Company lists · Data refreshed November 2026
Top 25 Mainframe migration services worldwide
RevenueBase identified 286 company matches for mainframe migration services worldwide as of November 2026 and tracks 8,027 professional contacts across them, including 3,060 with verified work emails. The United States is the largest market and London the largest hub.
This list covers company matches for mainframe migration services worldwide, 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 November 6, 2026. Country and city lists for mainframe migration services follow the table.
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 migration services worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 3,542 contacts → | ||||
Exact match “Ensono is an expert technology adviser and managed service provider.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 2 | 456 contacts → | ||||
Exact match “TmaxSoft is a global software innovator focused on infrastructure and data modernization, with solutions that offer enterprise CIOs viable alternatives to support their global IT…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 3 | 239 contacts → | ||||
Exact match “Maintec Technologies offers globally compliant IT solutions that empower businesses to become more competitive by leveraging both onsite and offshore capabilities.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 4 | 208 contacts → | ||||
Exact match “Astadia is the industry leader for mainframe migrations and modernizations.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 5 | 163 contacts → | ||||
Exact match “Founded in 2004 by visionaries from leading technology organizations, mLogica’s leaders envisioned a faster, more efficient way of modernizing IT infrastructures to eliminate the…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 6 | 159 contacts → | ||||
Exact match “Platform 3 Solutions is a global leader in end-to-end legacy application migration and retirement solutions.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 7 | 125 contacts → | ||||
Exact match “MOST Software Technologies helps customers leverage their investment in mainframe applications.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 8 | 108 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 · Nov 6, 2026 · View company records in RevenueBase | |||||
| 9 | 104 contacts → | ||||
Exact match “Data Driven and Data First!” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 10 | 90 contacts → | ||||
Exact match “Since 1982, Treehouse Software has been helping mainframe customers with innovative tools, services, and training.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 11 | 82 contacts → | ||||
Exact match “Softacom is a full-cycle business app migration and modernization provider.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 12 | 67 contacts → | ||||
Exact match “Headquartered in the UK, Vertali has a long and distinctive pedigree providing IBM mainframe services, skills and software to organizations around the world.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 13 | 59 contacts → | ||||
Exact match “Legacy to Cloud-At Your Pace, Without the Risk.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 14 | 56 contacts → | ||||
Exact match “Modern Systems empowers efficiency, agility, and competitive advantage through core application modernization.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 15 | 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 · Nov 6, 2026 · View company records in RevenueBase | |||||
| 16 | 46 contacts → | ||||
Exact match “Who are we?” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 17 | 41 contacts → | ||||
Exact match “Since 1993, Syspertec Group has been developing software solutions designed to simplify information system integration and modernize complex technical environments.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 18 | 37 contacts → | ||||
Exact match “Move Solutions is an IT services company specialized in development and transformation of information systems : Data Migration, Modernization and Maintenance.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 19 | 37 contacts → | ||||
Exact match “Over the years ADA Software has developed its expertise in the re-engineering and modernization of legacy application software and has delivered projects involving large and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 20 | 34 contacts → | ||||
Exact match “MAINFRAME IS AT OUR CORE ISI is an Australian mainframe expert distinguished by its surgical focus on mainframe technologies and a clear 30-year pedigree in mainframe…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 21 | 34 contacts → | ||||
Exact match “Since 1995 Flynet have been building some of the industry's most sophisticated web based solutions for Mainframe, Unix, IBM i, VMS, VAX and MultiValue systems.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 22 | 33 contacts → | ||||
Exact match “Transform your business with AINRATech’s expert cloud migration and legacy system modernization solutions.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 23 | 31 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 24 | 31 contacts → | ||||
Exact match “Data Strategies Interchange is a leading provider of large-scale data migration and conversion services to Fortune 500 and Global companies that need to upgrade from older…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 25 | 29 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 · Nov 6, 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 migration services”. 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 286 mainframe migration services worldwide
See the full list, filter by size, metro and specialty, and access 3,060 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Mainframe migration services worldwide at a glance
As of Nov 6, 2026Companies by employee count
Email recency is reported on each country list linked below.
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.
- Coverage
- Every country. Country and city lists for mainframe migration services are linked below.
- What qualifies
- Company records worldwide whose business descriptions match “mainframe migration services” 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. 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 3,060 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 November 6, 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.
Mainframe migration services by location
1 lists · largest firstEvery Mainframe migration services list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
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 migration services”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many mainframe migration services are there worldwide?
RevenueBase identified 286 company matches for mainframe migration services worldwide as of November 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?
Ensono tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which country has the most mainframe migration services?
The United States leads with 83 companies. Every mainframe migration services list by country and city is linked on this page.
Which city has the most mainframe migration services?
London leads with 5 company records, followed by Bangalore (4) and Paris (4).
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 3,060 professional contacts with verified work emails tracked across these 286 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 November 6, 2026.
Ready to reach these companies? Verified emails and direct dials for all 286 mainframe migration services worldwide. 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.
More company lists
Company intelligence · public preview
Top 25 mainframe migration services worldwide
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 286 matching company records for mainframe migration services worldwide, with 8,027 tracked contacts and 3,060 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: November 6, 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 migration services worldwide
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 |  Ensonoensono.comHQ: Downers Grove, IL, United StatesReported employees: 1,001-5,000 | Downers Grove, IL, United States | 1,001-5,000 | Exact match | 3,542 contacts → |
“Ensono is an expert technology adviser and managed service provider.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Tmaxsofttmaxsoft.comHQ: Gyeonggi-do, South KoreaReported employees: 501-1,000 | Gyeonggi-do, South Korea | 501-1,000 | Exact match | 456 contacts → |
“TmaxSoft is a global software innovator focused on infrastructure and data modernization, with solutions that offer enterprise CIOs viable alternatives to support their global IT…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Maintec Technologies - USAmaintec.comHQ: Raleigh, United StatesReported employees: 501-1,000 | Raleigh, United States | 501-1,000 | Exact match | 239 contacts → |
“Maintec Technologies offers globally compliant IT solutions that empower businesses to become more competitive by leveraging both onsite and offshore capabilities.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Astadiaastadia.comHQ: St. Louis, MO, United StatesReported employees: 201-500 | St. Louis, MO, United States | 201-500 | Exact match | 208 contacts → |
“Astadia is the industry leader for mainframe migrations and modernizations.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Mlogicamlogica.comHQ: Las Vegas, United StatesReported employees: 201-500 | Las Vegas, United States | 201-500 | Exact match | 163 contacts → |
“Founded in 2004 by visionaries from leading technology organizations, mLogica’s leaders envisioned a faster, more efficient way of modernizing IT infrastructures to eliminate the…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Platform 3 Solutionsplatform3solutions.comHQ: Minnetonka, United StatesReported employees: 201-500 | Minnetonka, United States | 201-500 | Exact match | 159 contacts → |
“Platform 3 Solutions is a global leader in end-to-end legacy application migration and retirement solutions.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Most Technologiesmosttechnologies.comHQ: Atlanta, GA, IsraelReported employees: 51-200 | Atlanta, GA, Israel | 51-200 | Exact match | 125 contacts → |
“MOST Software Technologies helps customers leverage their investment in mainframe applications.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Evolveware, INCevolveware.comHQ: Santa Clara, CA, United StatesReported employees: 51-200 | Santa Clara, CA, United States | 51-200 | Exact match | 108 contacts → |
“Founded in 2001, EvolveWare provides seamless application modernization journeys for enterprises, government organizations and global partners.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Proliant Dataproliantdatallc.comHQ: Burlington, MA, United StatesReported employees: 51-200 | Burlington, MA, United States | 51-200 | Exact match | 104 contacts → |
“Data Driven and Data First!” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Treehouse Softwaretreehouse.comHQ: Sewickley, PA, United StatesReported employees: 11-50 | Sewickley, PA, United States | 11-50 | Exact match | 90 contacts → |
“Since 1982, Treehouse Software has been helping mainframe customers with innovative tools, services, and training.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Softacomsoftacom.comHQ: Bellevue, WA, United StatesReported employees: 51-200 | Bellevue, WA, United States | 51-200 | Exact match | 82 contacts → |
“Softacom is a full-cycle business app migration and modernization provider.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Vertalivertali.comHQ: Bromsgrove B60 3dj, United KingdomReported employees: 11-50 | Bromsgrove B60 3dj, United Kingdom | 11-50 | Exact match | 67 contacts → |
“Headquartered in the UK, Vertali has a long and distinctive pedigree providing IBM mainframe services, skills and software to organizations around the world.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Openlegacyopenlegacy.comHQ: Princeton, NJ, United StatesReported employees: 51-200 | Princeton, NJ, United States | 51-200 | Exact match | 59 contacts → |
“Legacy to Cloud-At Your Pace, Without the Risk.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Modern Systems An Advanced Companymodernsystems.oneadvanced.comHQ: Dallas, TX, United StatesReported employees: 51-200 | Dallas, TX, United States | 51-200 | Exact match | 56 contacts → |
“Modern Systems empowers efficiency, agility, and competitive advantage through core application modernization.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | 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 · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Renapsrenaps.comHQ: Montréal, QC, CanadaReported employees: 51-200 | Montréal, QC, Canada | 51-200 | Exact match | 46 contacts → |
“Who are we?” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Syspertec Groupsyspertec.comHQ: Saint-cloud, CA, FranceReported employees: 11-50 | Saint-cloud, CA, France | 11-50 | Exact match | 41 contacts → |
“Since 1993, Syspertec Group has been developing software solutions designed to simplify information system integration and modernize complex technical environments.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Move Solutionsmovesol.comHQ: 69002, FranceReported employees: 51-200 | 69002, France | 51-200 | Exact match | 37 contacts → |
“Move Solutions is an IT services company specialized in development and transformation of information systems : Data Migration, Modernization and Maintenance.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  ADA Software RE Engineering Services Pvt. LTDadasoftware.comHQ: Kolkata, IndiaReported employees: 11-50 | Kolkata, India | 11-50 | Exact match | 37 contacts → |
“Over the years ADA Software has developed its expertise in the re-engineering and modernization of legacy application software and has delivered projects involving large and…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | ISI PTY LTDisi.com.au HQ: AustraliaReported employees: 51-200 | Australia | 51-200 | Exact match | 34 contacts → |
“MAINFRAME IS AT OUR CORE ISI is an Australian mainframe expert distinguished by its surgical focus on mainframe technologies and a clear 30-year pedigree in mainframe…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Flynetflynetviewer.comHQ: Burwell, United KingdomReported employees: 11-50 | Burwell, United Kingdom | 11-50 | Exact match | 34 contacts → |
“Since 1995 Flynet have been building some of the industry's most sophisticated web based solutions for Mainframe, Unix, IBM i, VMS, VAX and MultiValue systems.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Ainratechainratech.comHQ: Hyderabad, IndiaReported employees: 11-50 | Hyderabad, India | 11-50 | Exact match | 33 contacts → |
“Transform your business with AINRATech’s expert cloud migration and legacy system modernization solutions.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Databorough India PVT LTDdbindia.com HQ: United StatesReported employees: 11-50 | United States | 11-50 | Exact match | 31 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 24 |  Data Strategies Interchange, LLCgo-dsi.comHQ: Houston, TX, United StatesReported employees: 11-50 | Houston, TX, United States | 11-50 | Exact match | 31 contacts → |
“Data Strategies Interchange is a leading provider of large-scale data migration and conversion services to Fortune 500 and Global companies that need to upgrade from older…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Heirloom Computingheirloomcomputing.comHQ: Alamo, CA, United StatesReported employees: 51-200 | Alamo, CA, United States | 51-200 | Exact match | 29 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 · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 286 company matches
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Mainframe migration services: dataset insights
November 6, 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
284 records in the displayed employee bands.
2 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 across the whole country list rather than for Worldwide, so it is reported there. Company counts and contact totals on this page are exact for Worldwide, over 286 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: November 6, 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 ↗
Mainframe migration services by location
1 lists · largest firstEvery Mainframe migration services list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
Questions about this company list
What does Exact match mean for mainframe migration services?
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 migration services did RevenueBase find worldwide?
The saved snapshot records 286 matching company records, 8,027 tracked contacts and 3,060 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: November 6, 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.
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Cite this list
RevenueBase Data Team. Top 25 mainframe migration services worldwide. Snapshot: November 6, 2026. https://revenuebase.ai/companies/browse/mainframe-migration-services.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
Company intelligence · public preview
Top 25 mainframe migration services worldwide
RevenueBase records 286 matching company records for mainframe migration services worldwide, with 8,027 tracked contacts and 3,060 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: November 6, 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 migration services worldwide
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 | Ensonoensono.com HQ: Downers Grove, IL, United StatesReported employees: 1,001-5,000 | Downers Grove, IL, United States | 1,001-5,000 | Exact match | 3,542 contacts → |
“Ensono is an expert technology adviser and managed service provider.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Tmaxsofttmaxsoft.com HQ: Gyeonggi-do, South KoreaReported employees: 501-1,000 | Gyeonggi-do, South Korea | 501-1,000 | Exact match | 456 contacts → |
“TmaxSoft is a global software innovator focused on infrastructure and data modernization, with solutions that offer enterprise CIOs viable alternatives to support their global IT…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Maintec Technologies - USAmaintec.com HQ: Raleigh, United StatesReported employees: 501-1,000 | Raleigh, United States | 501-1,000 | Exact match | 239 contacts → |
“Maintec Technologies offers globally compliant IT solutions that empower businesses to become more competitive by leveraging both onsite and offshore capabilities.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Astadiaastadia.com HQ: St. Louis, MO, United StatesReported employees: 201-500 | St. Louis, MO, United States | 201-500 | Exact match | 208 contacts → |
“Astadia is the industry leader for mainframe migrations and modernizations.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Mlogicamlogica.com HQ: Las Vegas, United StatesReported employees: 201-500 | Las Vegas, United States | 201-500 | Exact match | 163 contacts → |
“Founded in 2004 by visionaries from leading technology organizations, mLogica’s leaders envisioned a faster, more efficient way of modernizing IT infrastructures to eliminate the…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Platform 3 Solutionsplatform3solutions.com HQ: Minnetonka, United StatesReported employees: 201-500 | Minnetonka, United States | 201-500 | Exact match | 159 contacts → |
“Platform 3 Solutions is a global leader in end-to-end legacy application migration and retirement solutions.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Most Technologiesmosttechnologies.com HQ: Atlanta, GA, IsraelReported employees: 51-200 | Atlanta, GA, Israel | 51-200 | Exact match | 125 contacts → |
“MOST Software Technologies helps customers leverage their investment in mainframe applications.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Evolveware, INCevolveware.com HQ: Santa Clara, CA, United StatesReported employees: 51-200 | Santa Clara, CA, United States | 51-200 | Exact match | 108 contacts → |
“Founded in 2001, EvolveWare provides seamless application modernization journeys for enterprises, government organizations and global partners.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Proliant Dataproliantdatallc.com HQ: Burlington, MA, United StatesReported employees: 51-200 | Burlington, MA, United States | 51-200 | Exact match | 104 contacts → |
“Data Driven and Data First!” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Treehouse Softwaretreehouse.com HQ: Sewickley, PA, United StatesReported employees: 11-50 | Sewickley, PA, United States | 11-50 | Exact match | 90 contacts → |
“Since 1982, Treehouse Software has been helping mainframe customers with innovative tools, services, and training.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Softacomsoftacom.com HQ: Bellevue, WA, United StatesReported employees: 51-200 | Bellevue, WA, United States | 51-200 | Exact match | 82 contacts → |
“Softacom is a full-cycle business app migration and modernization provider.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Vertalivertali.com HQ: Bromsgrove B60 3dj, United KingdomReported employees: 11-50 | Bromsgrove B60 3dj, United Kingdom | 11-50 | Exact match | 67 contacts → |
“Headquartered in the UK, Vertali has a long and distinctive pedigree providing IBM mainframe services, skills and software to organizations around the world.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Openlegacyopenlegacy.com HQ: Princeton, NJ, United StatesReported employees: 51-200 | Princeton, NJ, United States | 51-200 | Exact match | 59 contacts → |
“Legacy to Cloud-At Your Pace, Without the Risk.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Modern Systems An Advanced Companymodernsystems.oneadvanced.com HQ: Dallas, TX, United StatesReported employees: 51-200 | Dallas, TX, United States | 51-200 | Exact match | 56 contacts → |
“Modern Systems empowers efficiency, agility, and competitive advantage through core application modernization.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | 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 · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Renapsrenaps.com HQ: Montréal, QC, CanadaReported employees: 51-200 | Montréal, QC, Canada | 51-200 | Exact match | 46 contacts → |
“Who are we?” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Syspertec Groupsyspertec.com HQ: Saint-cloud, CA, FranceReported employees: 11-50 | Saint-cloud, CA, France | 11-50 | Exact match | 41 contacts → |
“Since 1993, Syspertec Group has been developing software solutions designed to simplify information system integration and modernize complex technical environments.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Move Solutionsmovesol.com HQ: 69002, FranceReported employees: 51-200 | 69002, France | 51-200 | Exact match | 37 contacts → |
“Move Solutions is an IT services company specialized in development and transformation of information systems : Data Migration, Modernization and Maintenance.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | ADA Software RE Engineering Services Pvt. LTDadasoftware.com HQ: Kolkata, IndiaReported employees: 11-50 | Kolkata, India | 11-50 | Exact match | 37 contacts → |
“Over the years ADA Software has developed its expertise in the re-engineering and modernization of legacy application software and has delivered projects involving large and…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | ISI PTY LTDisi.com.au HQ: AustraliaReported employees: 51-200 | Australia | 51-200 | Exact match | 34 contacts → |
“MAINFRAME IS AT OUR CORE ISI is an Australian mainframe expert distinguished by its surgical focus on mainframe technologies and a clear 30-year pedigree in mainframe…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Flynetflynetviewer.com HQ: Burwell, United KingdomReported employees: 11-50 | Burwell, United Kingdom | 11-50 | Exact match | 34 contacts → |
“Since 1995 Flynet have been building some of the industry's most sophisticated web based solutions for Mainframe, Unix, IBM i, VMS, VAX and MultiValue systems.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Ainratechainratech.com HQ: Hyderabad, IndiaReported employees: 11-50 | Hyderabad, India | 11-50 | Exact match | 33 contacts → |
“Transform your business with AINRATech’s expert cloud migration and legacy system modernization solutions.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Databorough India PVT LTDdbindia.com HQ: United StatesReported employees: 11-50 | United States | 11-50 | Exact match | 31 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 24 | Data Strategies Interchange, LLCgo-dsi.com HQ: Houston, TX, United StatesReported employees: 11-50 | Houston, TX, United States | 11-50 | Exact match | 31 contacts → |
“Data Strategies Interchange is a leading provider of large-scale data migration and conversion services to Fortune 500 and Global companies that need to upgrade from older…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Heirloom Computingheirloomcomputing.com HQ: Alamo, CA, United StatesReported employees: 51-200 | Alamo, CA, United States | 51-200 | Exact match | 29 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 · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 286 company matches
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Mainframe migration services: dataset insights
November 6, 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
284 records in the displayed employee bands.
2 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 across the whole country list rather than for Worldwide, so it is reported there. Company counts and contact totals on this page are exact for Worldwide, over 286 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: November 6, 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 ↗
Mainframe migration services by location
1 lists · largest firstEvery Mainframe migration services list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
Questions about this company list
What does Exact match mean for mainframe migration services?
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 migration services did RevenueBase find worldwide?
The saved snapshot records 286 matching company records, 8,027 tracked contacts and 3,060 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: November 6, 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.
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Cite this list
RevenueBase Data Team. Top 25 mainframe migration services worldwide. Snapshot: November 6, 2026. https://revenuebase.ai/companies/browse/mainframe-migration-services.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗