Company lists · Data refreshed October 2026
Top 25 Mainframe modernization software suppliers based in the United States
RevenueBase identified 83 company matches for mainframe modernization software suppliers associated with the United States as of October 2026 and tracks 1,395 professional contacts across them, including 383 with verified work emails. Houston is the largest hub.
This list covers company matches for mainframe modernization software suppliers associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 19, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest mainframe modernization software suppliers based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 207 contacts → | ||||
Exact match “Astadia is the industry leader for mainframe migrations and modernizations.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase | |||||
| 2 | 106 contacts → | ||||
Exact match “Founded in 2001, EvolveWare provides seamless application modernization journeys for enterprises, government organizations and global partners.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase | |||||
| 3 | 85 contacts → | ||||
Exact match “Since 1982, Treehouse Software has been helping mainframe customers with innovative tools, services, and training.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase | |||||
| 4 | 80 contacts → | ||||
Exact match “Ispirer Systems is an international software company that provides the customers with the effective way to improve IT infrastructure.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase | |||||
| 5 | 77 contacts → | ||||
Exact match “Softacom is a full-cycle business app migration and modernization provider.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase | |||||
| 6 | 74 contacts → | ||||
Exact match “Adaptigent™ empowers the adaptive, intelligent enterprise, unlocking the potential of legacy mission-critical systems to enable digital transformation.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase | |||||
| 7 | 55 contacts → | ||||
Exact match “As a leading provider of software modernization services, TSRI enables technology readiness for the Cloud and other modern architecture environments.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase | |||||
| 8 | 55 contacts → | ||||
Exact match “Modern Systems empowers efficiency, agility, and competitive advantage through core application modernization.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase | |||||
| 9 | 50 contacts → | ||||
Exact match “The CloudFrame Modernization Suite is the most advanced legacy modernization software in the industry.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase | |||||
| 10 | 46 contacts → | ||||
Exact match “The UNICOM Systems Technology Division delivers world-class CICS automation and z/OS and z/VM software solutions to IBM Z customers globally, integration services and solutions to…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase | |||||
| 11 | 43 contacts → | ||||
Exact match “Updraft is a Chicago-based company providing automated software modernization tools to companies and systems integrators (SIs) needing exceptionally high quality code when…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase | |||||
| 12 | 28 contacts → | ||||
Exact match “Heirloom Computing is a global enterprise software company that partners with GSIs and CSPs to migrate mainframe workloads as cloud-native applications on any cloud.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase | |||||
| 13 | 25 contacts → | ||||
Exact match “Select provides comprehensive solutions consisting of tools and services for information access and enterprise reporting, as well as business critical IT software development…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase | |||||
| 14 | 24 contacts → | ||||
Exact match “Thousands of organizations in the private and public sectors worldwide depend on applications written decades ago, but this legacy software hinders their ability to exploit new…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase | |||||
| 15 | 20 contacts → | ||||
Exact match “Veryant provides COBOL software solutions that optimize IT resources, revitalize programming resources, and dramatically lower cost.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase | |||||
| 16 | 18 contacts → | ||||
Exact match “Zengines helps financial services enterprises position their data for AI, usable across every system change, and explainable across decades of legacy code.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase | |||||
| 17 | 17 contacts → | ||||
Exact match “We transition organizations from what feels like moving a mountain to building a solid foundation and proven framework that accelerates and simplifies modernization.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase | |||||
| 18 | 12 contacts → | ||||
Exact match “At AveriSource, our mission is to help you achieve your legacy modernization objectives.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase | |||||
| 19 | 11 contacts → | ||||
Exact match “Sembix is the end-to-end Modernization Intelligence platform that helps organizations fully understand the system they have, define the system they want, and automate the…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase | |||||
| 20 | 11 contacts → | ||||
Exact match “Great Migrations develops, sells, and supports advanced system analysis and re-engineering tools that help preserve and enhance our customers' software assets so they can adapt…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase | |||||
| 21 | 11 contacts → | ||||
Exact match “Infinite Corporation is the global leader in IBM i (AS/400) migration and modernization toolsets.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase | |||||
| 22 | 10 contacts → | ||||
Exact match “SFI offers one of the most comprehensive portfolios of IBM Mainframe software expertise in North America.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase | |||||
| 23 | 9 contacts → | ||||
Exact match “Ice Tea Group LLC, located in Washington DC, is a worldwide specialist for enterprise application modernization and business web frameworks.” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase | |||||
| 24 | 9 contacts → | ||||
Exact match “Unlocking Legacy Code with AI, Automated, Accurate, Future-Ready Updraft, powered by Natsoft, is an AI-driven legacy modernization platform that transforms complex, undocumented…” Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase | |||||
| 25 | 8 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 19, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “mainframe modernization software suppliers”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 83 mainframe modernization software suppliers based in the United States
See the full list, filter by size, metro and specialty, and access 383 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Mainframe modernization software suppliers based in the United States at a glance
As of Oct 19, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 83 companies.
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Company records associated with the United States whose business descriptions match “mainframe modernization software suppliers” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every displayed company carries at least one verified work email. RevenueBase tracks 383 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on October 19, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “mainframe modernization software suppliers”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many mainframe modernization software suppliers are there based in the United States?
RevenueBase identified 83 company matches for mainframe modernization software suppliers associated with the United States as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
Astadia tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most mainframe modernization software suppliers?
Houston leads with 4 company records, followed by Austin (3) and Dallas (2).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 383 professional contacts with verified work emails tracked across these 83 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 19, 2026.
Ready to reach these companies? Verified emails and direct dials for all 83 mainframe modernization software suppliers based in the United States. Start with a free account, no credit card.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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Company intelligence · public preview
Top 25 mainframe modernization software suppliers based in the United States
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 83 matching company records for mainframe modernization software suppliers based in the United States, with 1,395 tracked contacts and 383 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: October 19, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 mainframe modernization software suppliers based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Astadiaastadia.comHQ: St. Louis, MO, United StatesReported employees: 201-500 | St. Louis, MO, United States | 201-500 | Exact match | 207 contacts → |
“Astadia is the industry leader for mainframe migrations and modernizations.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Evolveware, INCevolveware.comHQ: Santa Clara, CA, United StatesReported employees: 51-200 | Santa Clara, CA, United States | 51-200 | Exact match | 106 contacts → |
“Founded in 2001, EvolveWare provides seamless application modernization journeys for enterprises, government organizations and global partners.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Treehouse Softwaretreehouse.com HQ: Sewickley, PA, United StatesReported employees: 11-50 | Sewickley, PA, United States | 11-50 | Exact match | 85 contacts → |
“Since 1982, Treehouse Software has been helping mainframe customers with innovative tools, services, and training.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Ispirer Systemsispirer.comHQ: Dover, DE, United StatesReported employees: 51-200 | Dover, DE, United States | 51-200 | Exact match | 80 contacts → |
“Ispirer Systems is an international software company that provides the customers with the effective way to improve IT infrastructure.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Softacomsoftacom.comHQ: Bellevue, WA, United StatesReported employees: 51-200 | Bellevue, WA, United States | 51-200 | Exact match | 77 contacts → |
“Softacom is a full-cycle business app migration and modernization provider.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Adaptigentadaptigent.comHQ: Winter Park, FL, United StatesReported employees: 51-200 | Winter Park, FL, United States | 51-200 | Exact match | 74 contacts → |
“Adaptigent™ empowers the adaptive, intelligent enterprise, unlocking the potential of legacy mission-critical systems to enable digital transformation.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | HQ: Kirkland, WA, United StatesReported employees: 11-50 | Kirkland, WA, United States | 11-50 | Exact match | 55 contacts → |
“As a leading provider of software modernization services, TSRI enables technology readiness for the Cloud and other modern architecture environments.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Modern Systems An Advanced Companymodernsystems.oneadvanced.comHQ: Dallas, TX, United StatesReported employees: 51-200 | Dallas, TX, United States | 51-200 | Exact match | 55 contacts → |
“Modern Systems empowers efficiency, agility, and competitive advantage through core application modernization.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Cloudframecloudframe.comHQ: Princeton, NJ, United StatesReported employees: 51-200 | Princeton, NJ, United States | 51-200 | Exact match | 50 contacts → |
“The CloudFrame Modernization Suite is the most advanced legacy modernization software in the industry.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Unicom Systems, INCunicomsi.com HQ: Mission Hills, CA, United StatesReported employees: 11-50 | Mission Hills, CA, United States | 11-50 | Exact match | 46 contacts → |
“The UNICOM Systems Technology Division delivers world-class CICS automation and z/OS and z/VM software solutions to IBM Z customers globally, integration services and solutions to…” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Uniquesoft IS NOW Updraftupdraft.comHQ: Palatine, IL, United StatesReported employees: 11-50 | Palatine, IL, United States | 11-50 | Exact match | 43 contacts → |
“Updraft is a Chicago-based company providing automated software modernization tools to companies and systems integrators (SIs) needing exceptionally high quality code when…” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Heirloom Computingheirloomcomputing.comHQ: Alamo, CA, United StatesReported employees: 51-200 | Alamo, CA, United States | 51-200 | Exact match | 28 contacts → |
“Heirloom Computing is a global enterprise software company that partners with GSIs and CSPs to migrate mainframe workloads as cloud-native applications on any cloud.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Select Business Solutionsselectbs.com HQ: Shelton, CT, United StatesReported employees: 51-200 | Shelton, CT, United States | 51-200 | Exact match | 25 contacts → |
“Select provides comprehensive solutions consisting of tools and services for information access and enterprise reporting, as well as business critical IT software development…” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  CM First Groupcmfirstgroup.comHQ: Austin, TX, United StatesReported employees: 11-50 | Austin, TX, United States | 11-50 | Exact match | 24 contacts → |
“Thousands of organizations in the private and public sectors worldwide depend on applications written decades ago, but this legacy software hinders their ability to exploit new…” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Veryantveryant.comHQ: San Diego, CA, United StatesReported employees: 11-50 | San Diego, CA, United States | 11-50 | Exact match | 20 contacts → |
“Veryant provides COBOL software solutions that optimize IT resources, revitalize programming resources, and dramatically lower cost.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Zengineszengines.aiHQ: Bedford, MA, United StatesReported employees: 11-50 | Bedford, MA, United States | 11-50 | Exact match | 18 contacts → |
“Zengines helps financial services enterprises position their data for AI, usable across every system change, and explainable across decades of legacy code.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  FIVEMfivem.llcHQ: Tampa, FL, United StatesReported employees: 1-10 | Tampa, FL, United States | 1-10 | Exact match | 17 contacts → |
“We transition organizations from what feels like moving a mountain to building a solid foundation and proven framework that accelerates and simplifies modernization.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Averisourceaverisource.comHQ: San Antonio, TX, United StatesReported employees: 51-200 | San Antonio, TX, United States | 51-200 | Exact match | 12 contacts → |
“At AveriSource, our mission is to help you achieve your legacy modernization objectives.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Sembixsembix.aiHQ: Houston, TX, United StatesReported employees: 11-50 | Houston, TX, United States | 11-50 | Exact match | 11 contacts → |
“Sembix is the end-to-end Modernization Intelligence platform that helps organizations fully understand the system they have, define the system they want, and automate the…” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Great Migrations LLCgreatmigrations.comHQ: Dublin, OH, United StatesReported employees: 1-10 | Dublin, OH, United States | 1-10 | Exact match | 11 contacts → |
“Great Migrations develops, sells, and supports advanced system analysis and re-engineering tools that help preserve and enhance our customers' software assets so they can adapt…” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Infinite Corporationinfinitecorporation.com HQ: Laguna Niguel, CA, United StatesReported employees: 51-200 | Laguna Niguel, CA, United States | 51-200 | Exact match | 11 contacts → |
“Infinite Corporation is the global leader in IBM i (AS/400) migration and modernization toolsets.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Streamfoundrystreamfoundry.com HQ: Newton, MA, United StatesReported employees: 11-50 | Newton, MA, United States | 11-50 | Exact match | 10 contacts → |
“SFI offers one of the most comprehensive portfolios of IBM Mainframe software expertise in North America.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  ICE TEA Group Wisej.Neticeteagroup.comHQ: Washington Dc, DC, United StatesReported employees: 11-50 | Washington Dc, DC, United States | 11-50 | Exact match | 9 contacts → |
“Ice Tea Group LLC, located in Washington DC, is a worldwide specialist for enterprise application modernization and business web frameworks.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Updraft Worksupdraftworks.comHQ: Somerset, NJ, United StatesReported employees: 51-200 | Somerset, NJ, United States | 51-200 | Exact match | 9 contacts → |
“Unlocking Legacy Code with AI, Automated, Accurate, Future-Ready Updraft, powered by Natsoft, is an AI-driven legacy modernization platform that transforms complex, undocumented…” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Datatek, INCdatatek-net.comHQ: Durham, NC, United StatesReported employees: 11-50 | Durham, NC, United States | 11-50 | Exact match | 8 contacts → |
No recorded description excerpt is available for this public record. | |||||
Showing 25 of 83 company matches
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Mainframe modernization software suppliers: dataset insights
October 19, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
83 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 83 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: October 19, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for mainframe modernization software suppliers?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many mainframe modernization software suppliers did RevenueBase find based in the United States?
The saved snapshot records 83 matching company records, 1,395 tracked contacts and 383 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: October 19, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Cite this list
RevenueBase Data Team. Top 25 mainframe modernization software suppliers based in the United States. Snapshot: October 19, 2026. https://revenuebase.ai/companies/mainframe-modernization-software-suppliers/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- AI companies based in the United States
- Cybersecurity companies based in the United States
- Manufacturing companies based in the United States
- Media companies based in the United States
- Oil and gas companies based in the United States
- Real estate companies based in the United States
Company intelligence · public preview
Top 25 mainframe modernization software suppliers based in the United States
RevenueBase records 83 matching company records for mainframe modernization software suppliers based in the United States, with 1,395 tracked contacts and 383 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: October 19, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 mainframe modernization software suppliers based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Astadiaastadia.com HQ: St. Louis, MO, United StatesReported employees: 201-500 | St. Louis, MO, United States | 201-500 | Exact match | 207 contacts → |
“Astadia is the industry leader for mainframe migrations and modernizations.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Evolveware, INCevolveware.com HQ: Santa Clara, CA, United StatesReported employees: 51-200 | Santa Clara, CA, United States | 51-200 | Exact match | 106 contacts → |
“Founded in 2001, EvolveWare provides seamless application modernization journeys for enterprises, government organizations and global partners.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Treehouse Softwaretreehouse.com HQ: Sewickley, PA, United StatesReported employees: 11-50 | Sewickley, PA, United States | 11-50 | Exact match | 85 contacts → |
“Since 1982, Treehouse Software has been helping mainframe customers with innovative tools, services, and training.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Ispirer Systemsispirer.com HQ: Dover, DE, United StatesReported employees: 51-200 | Dover, DE, United States | 51-200 | Exact match | 80 contacts → |
“Ispirer Systems is an international software company that provides the customers with the effective way to improve IT infrastructure.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Softacomsoftacom.com HQ: Bellevue, WA, United StatesReported employees: 51-200 | Bellevue, WA, United States | 51-200 | Exact match | 77 contacts → |
“Softacom is a full-cycle business app migration and modernization provider.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Adaptigentadaptigent.com HQ: Winter Park, FL, United StatesReported employees: 51-200 | Winter Park, FL, United States | 51-200 | Exact match | 74 contacts → |
“Adaptigent™ empowers the adaptive, intelligent enterprise, unlocking the potential of legacy mission-critical systems to enable digital transformation.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | HQ: Kirkland, WA, United StatesReported employees: 11-50 | Kirkland, WA, United States | 11-50 | Exact match | 55 contacts → |
“As a leading provider of software modernization services, TSRI enables technology readiness for the Cloud and other modern architecture environments.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Modern Systems An Advanced Companymodernsystems.oneadvanced.com HQ: Dallas, TX, United StatesReported employees: 51-200 | Dallas, TX, United States | 51-200 | Exact match | 55 contacts → |
“Modern Systems empowers efficiency, agility, and competitive advantage through core application modernization.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Cloudframecloudframe.com HQ: Princeton, NJ, United StatesReported employees: 51-200 | Princeton, NJ, United States | 51-200 | Exact match | 50 contacts → |
“The CloudFrame Modernization Suite is the most advanced legacy modernization software in the industry.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Unicom Systems, INCunicomsi.com HQ: Mission Hills, CA, United StatesReported employees: 11-50 | Mission Hills, CA, United States | 11-50 | Exact match | 46 contacts → |
“The UNICOM Systems Technology Division delivers world-class CICS automation and z/OS and z/VM software solutions to IBM Z customers globally, integration services and solutions to…” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Uniquesoft IS NOW Updraftupdraft.com HQ: Palatine, IL, United StatesReported employees: 11-50 | Palatine, IL, United States | 11-50 | Exact match | 43 contacts → |
“Updraft is a Chicago-based company providing automated software modernization tools to companies and systems integrators (SIs) needing exceptionally high quality code when…” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Heirloom Computingheirloomcomputing.com HQ: Alamo, CA, United StatesReported employees: 51-200 | Alamo, CA, United States | 51-200 | Exact match | 28 contacts → |
“Heirloom Computing is a global enterprise software company that partners with GSIs and CSPs to migrate mainframe workloads as cloud-native applications on any cloud.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Select Business Solutionsselectbs.com HQ: Shelton, CT, United StatesReported employees: 51-200 | Shelton, CT, United States | 51-200 | Exact match | 25 contacts → |
“Select provides comprehensive solutions consisting of tools and services for information access and enterprise reporting, as well as business critical IT software development…” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | CM First Groupcmfirstgroup.com HQ: Austin, TX, United StatesReported employees: 11-50 | Austin, TX, United States | 11-50 | Exact match | 24 contacts → |
“Thousands of organizations in the private and public sectors worldwide depend on applications written decades ago, but this legacy software hinders their ability to exploit new…” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Veryantveryant.com HQ: San Diego, CA, United StatesReported employees: 11-50 | San Diego, CA, United States | 11-50 | Exact match | 20 contacts → |
“Veryant provides COBOL software solutions that optimize IT resources, revitalize programming resources, and dramatically lower cost.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Zengineszengines.ai HQ: Bedford, MA, United StatesReported employees: 11-50 | Bedford, MA, United States | 11-50 | Exact match | 18 contacts → |
“Zengines helps financial services enterprises position their data for AI, usable across every system change, and explainable across decades of legacy code.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | FIVEMfivem.llc HQ: Tampa, FL, United StatesReported employees: 1-10 | Tampa, FL, United States | 1-10 | Exact match | 17 contacts → |
“We transition organizations from what feels like moving a mountain to building a solid foundation and proven framework that accelerates and simplifies modernization.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Averisourceaverisource.com HQ: San Antonio, TX, United StatesReported employees: 51-200 | San Antonio, TX, United States | 51-200 | Exact match | 12 contacts → |
“At AveriSource, our mission is to help you achieve your legacy modernization objectives.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Sembixsembix.ai HQ: Houston, TX, United StatesReported employees: 11-50 | Houston, TX, United States | 11-50 | Exact match | 11 contacts → |
“Sembix is the end-to-end Modernization Intelligence platform that helps organizations fully understand the system they have, define the system they want, and automate the…” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Great Migrations LLCgreatmigrations.com HQ: Dublin, OH, United StatesReported employees: 1-10 | Dublin, OH, United States | 1-10 | Exact match | 11 contacts → |
“Great Migrations develops, sells, and supports advanced system analysis and re-engineering tools that help preserve and enhance our customers' software assets so they can adapt…” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Infinite Corporationinfinitecorporation.com HQ: Laguna Niguel, CA, United StatesReported employees: 51-200 | Laguna Niguel, CA, United States | 51-200 | Exact match | 11 contacts → |
“Infinite Corporation is the global leader in IBM i (AS/400) migration and modernization toolsets.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Streamfoundrystreamfoundry.com HQ: Newton, MA, United StatesReported employees: 11-50 | Newton, MA, United States | 11-50 | Exact match | 10 contacts → |
“SFI offers one of the most comprehensive portfolios of IBM Mainframe software expertise in North America.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | ICE TEA Group Wisej.Neticeteagroup.com HQ: Washington Dc, DC, United StatesReported employees: 11-50 | Washington Dc, DC, United States | 11-50 | Exact match | 9 contacts → |
“Ice Tea Group LLC, located in Washington DC, is a worldwide specialist for enterprise application modernization and business web frameworks.” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Updraft Worksupdraftworks.com HQ: Somerset, NJ, United StatesReported employees: 51-200 | Somerset, NJ, United States | 51-200 | Exact match | 9 contacts → |
“Unlocking Legacy Code with AI, Automated, Accurate, Future-Ready Updraft, powered by Natsoft, is an AI-driven legacy modernization platform that transforms complex, undocumented…” Recorded description excerpt · October 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Datatek, INCdatatek-net.com HQ: Durham, NC, United StatesReported employees: 11-50 | Durham, NC, United States | 11-50 | Exact match | 8 contacts → |
No recorded description excerpt is available for this public record. | |||||
Showing 25 of 83 company matches
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Mainframe modernization software suppliers: dataset insights
October 19, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
83 records in the displayed employee bands.
0 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 83 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: October 19, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Questions about this company list
What does Exact match mean for mainframe modernization software suppliers?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many mainframe modernization software suppliers did RevenueBase find based in the United States?
The saved snapshot records 83 matching company records, 1,395 tracked contacts and 383 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: October 19, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Cite this list
RevenueBase Data Team. Top 25 mainframe modernization software suppliers based in the United States. Snapshot: October 19, 2026. https://revenuebase.ai/companies/mainframe-modernization-software-suppliers/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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