Company lists · Data refreshed November 2026
Top 22 Open source development firms based in the United States
RevenueBase identified 210 company matches for open source development firms associated with the United States as of November 2026 and tracks 28,878 professional contacts across them, including 12,601 with verified work emails. New York is the largest hub.
This list covers company matches for open source development firms 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 November 6, 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 22 largest open source development firms based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 25,149 contacts → | ||||
Exact match “Red Hat is the world’s leading provider of enterprise open source solutions, using a community-powered approach to deliver high-performing Linux, hybrid cloud, edge, and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 2 | 1,207 contacts → | ||||
Exact match “The Apache Software Foundation (ASF) is the global home for open source software, powering some of the world’s most ubiquitous software projects including Apache Airflow, Apache…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 3 | 866 contacts → | ||||
Exact match “The Linux Foundation is the organization of choice for the world's top developers and companies to build ecosystems that accelerate open technology development and commercial…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 4 | 378 contacts → | ||||
Exact match “Altamira Technologies, a Parsons Company, is a top open source technology company in the national security space.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 5 | 44 contacts → | ||||
Exact match “Quansight catalyzes sustainable innovation by connecting enterprise needs with community driven open source.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 6 | 27 contacts → | ||||
Exact match “Enterprise support for your entire stack powered by a self-hosted AI agent that runs entirely inside your perimeter, with human experts one escalation away.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 7 | 25 contacts → | ||||
Exact match “Quimbik is a software engineering company focused on web applications (solutions).” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 8 | 16 contacts → | ||||
Exact match “Lucidus Solutions (Lucidus) is an Information Technology company that has earned a reputation for providing exceptional services and support to clients since our founding in 2006.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 9 | 13 contacts → | ||||
Exact match “Founded in 2008, Zivtech is a full-service web design and development agency that specializes in open-source software.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 10 | 12 contacts → | ||||
Exact match “Gloscon is an Open Source consulting company specializing in Drupal, Ruby on Rails, Hadoop and Mobile development.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 11 | 11 contacts → | ||||
Exact match “Unison Computing is a Delaware public benefit corp.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 12 | 11 contacts → | ||||
Exact match “Nonadyne Inc was founded in 2013.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 13 | 9 contacts → | ||||
Exact match “Responding to these goals we have assembled a world-class team of developers who bring a unique mix of experience in Open Source development, building communities around…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 14 | 9 contacts → | ||||
Exact match “We offer the same professional services as large software development firms, but at rates that are competitive on an international level.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 15 | 8 contacts → | ||||
Exact match “We are Infinity.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 16 | 8 contacts → | ||||
Exact match “Since we've built on open source: not as a compromise, but as a conviction.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 17 | 8 contacts → | ||||
Exact match “We are an Open Source Product Agency defining, designing and delivering websites, platforms and digital experiences.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 18 | 7 contacts → | ||||
Exact match “We are a team of diverse and highly skilled freelance Information Technology (IT) professionals sourced from various locations across the United States and managed from our…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 19 | 7 contacts → | ||||
Exact match “At Little Bear Labs, we channel your big ideas into real-world software products.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 20 | 7 contacts → | ||||
Exact match “Innovative Software Solutions for Your Business.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 21 | 7 contacts → | ||||
Exact match “Founded in Denver, Colorado, in 2012, we are a highly experienced team of designers and developers delivering exceptional software solutions.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase | |||||
| 22 | 6 contacts → | ||||
Exact match “At Mementia, we deliver only the highest quality software solutions.” 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 “open source development firms”. 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 22 of 210 open source development firms based in the United States
See the full list, filter by size, metro and specialty, and access 12,601 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Open source development firms based in the United States at a glance
As of Nov 6, 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 210 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 “open source development firms” 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 12,601 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.
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 “open source development firms”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many open source development firms are there based in the United States?
RevenueBase identified 210 company matches for open source development firms associated with the United States 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?
RED HAT tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most open source development firms?
New York leads with 10 company records, followed by San Francisco (8) and Austin (7).
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 12,601 professional contacts with verified work emails tracked across these 210 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 210 open source development firms based in the United States. Start with a free account, no credit card.
Download this list →Related lists
Open source development firms by geography
- Open source development firms based in France
- Open source development firms based in Germany
- Open source development firms based in India
- Open source development firms based in Italy
- Open source development firms based in the Netherlands
- Open source development firms based in Spain
- Open source development firms based in the United Kingdom
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
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Open source development firms based in France
- Open source development firms based in Germany
- Open source development firms based in India
- Open source development firms based in Italy
- Open source development firms based in the Netherlands
- Open source development firms based in Spain
Company intelligence · public preview
Top 22 open source development firms 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 210 matching company records for open source development firms based in the United States, with 28,878 tracked contacts and 12,601 verified work emails.
This public preview shows 22 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 22 open source development firms 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 |  RED HATredhat.comHQ: Raleigh, NC, United StatesReported employees: 10001+ | Raleigh, NC, United States | 10001+ | Exact match | 25,149 contacts → |
“Red Hat is the world’s leading provider of enterprise open source solutions, using a community-powered approach to deliver high-performing Linux, hybrid cloud, edge, and…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  The Apache Software Foundationapache.orgHQ: Wilmington, DE, United StatesReported employees: 5,001-10,000 | Wilmington, DE, United States | 5,001-10,000 | Exact match | 1,207 contacts → |
“The Apache Software Foundation (ASF) is the global home for open source software, powering some of the world’s most ubiquitous software projects including Apache Airflow, Apache…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  The Linux Foundationlinuxfoundation.orgHQ: San Francisco, CA, United StatesReported employees: 201-500 | San Francisco, CA, United States | 201-500 | Exact match | 866 contacts → |
“The Linux Foundation is the organization of choice for the world's top developers and companies to build ecosystems that accelerate open technology development and commercial…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Altamira Technologies Corporationaltamiracorp.comHQ: Mclean, MD, United StatesReported employees: 501-1,000 | Mclean, MD, United States | 501-1,000 | Exact match | 378 contacts → |
“Altamira Technologies, a Parsons Company, is a top open source technology company in the national security space.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Quansightquansight.comHQ: Austin, TX, United StatesReported employees: 11-50 | Austin, TX, United States | 11-50 | Exact match | 44 contacts → |
“Quansight catalyzes sustainable innovation by connecting enterprise needs with community driven open source.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Hosstedhossted.comHQ: Middletown, DE, United StatesReported employees: 11-50 | Middletown, DE, United States | 11-50 | Exact match | 27 contacts → |
“Enterprise support for your entire stack powered by a self-hosted AI agent that runs entirely inside your perimeter, with human experts one escalation away.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Quimbik, INCquimbik.comHQ: San Francisco, CA, United StatesReported employees: 11-50 | San Francisco, CA, United States | 11-50 | Exact match | 25 contacts → |
“Quimbik is a software engineering company focused on web applications (solutions).” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Lucidus Solutionslucidus.comHQ: Baltimore, United StatesReported employees: 11-50 | Baltimore, United States | 11-50 | Exact match | 16 contacts → |
“Lucidus Solutions (Lucidus) is an Information Technology company that has earned a reputation for providing exceptional services and support to clients since our founding in 2006.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Zivtechzivtech.comHQ: Philadelphia, PA, United StatesReported employees: 11-50 | Philadelphia, PA, United States | 11-50 | Exact match | 13 contacts → |
“Founded in 2008, Zivtech is a full-service web design and development agency that specializes in open-source software.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Gloscon Solutions PVT Limitedgloscon.comHQ: Fort Worth, TX, United StatesReported employees: 11-50 | Fort Worth, TX, United States | 11-50 | Exact match | 12 contacts → |
“Gloscon is an Open Source consulting company specializing in Drupal, Ruby on Rails, Hadoop and Mobile development.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Unison Computingunison.cloudHQ: Somerville, MA, United StatesReported employees: 1-10 | Somerville, MA, United States | 1-10 | Exact match | 11 contacts → |
“Unison Computing is a Delaware public benefit corp.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Nonadyne,incnonadyne.comHQ: Wixom, MI, United StatesReported employees: 1-10 | Wixom, MI, United States | 1-10 | Exact match | 11 contacts → |
“Nonadyne Inc was founded in 2013.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Brainfoodbrainfood.comHQ: Dallas, TX, United StatesReported employees: 11-50 | Dallas, TX, United States | 11-50 | Exact match | 9 contacts → |
“Responding to these goals we have assembled a world-class team of developers who bring a unique mix of experience in Open Source development, building communities around…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Interaticainteratica.comHQ: Walnut, CA, United StatesReported employees: 11-50 | Walnut, CA, United States | 11-50 | Exact match | 9 contacts → |
“We offer the same professional services as large software development firms, but at rates that are competitive on an international level.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Infinity Interactiveiinteractive.comHQ: Manhasset, NY, United StatesReported employees: 11-50 | Manhasset, NY, United States | 11-50 | Exact match | 8 contacts → |
“We are Infinity.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Freelockfreelock.comHQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 8 contacts → |
“Since we've built on open source: not as a compromise, but as a conviction.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Mediacurrentmediacurrent.com HQ: Alpharetta, GA, United StatesReported employees: 51-200 | Alpharetta, GA, United States | 51-200 | Exact match | 8 contacts → |
“We are an Open Source Product Agency defining, designing and delivering websites, platforms and digital experiences.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Extra Nerdsextranerds.comHQ: Athens, OH, United StatesReported employees: 1-10 | Athens, OH, United States | 1-10 | Exact match | 7 contacts → |
“We are a team of diverse and highly skilled freelance Information Technology (IT) professionals sourced from various locations across the United States and managed from our…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Little Bear Labslittlebearlabs.ioHQ: Boulder, CO, United StatesReported employees: 11-50 | Boulder, CO, United States | 11-50 | Exact match | 7 contacts → |
“At Little Bear Labs, we channel your big ideas into real-world software products.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Savantly LLCsavantly.netHQ: Fort Worth, TX, United StatesReported employees: 1-10 | Fort Worth, TX, United States | 1-10 | Exact match | 7 contacts → |
“Innovative Software Solutions for Your Business.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Epic Appsepicbusinessapps.comHQ: Greenwood Village, CO, United StatesReported employees: 11-50 | Greenwood Village, CO, United States | 11-50 | Exact match | 7 contacts → |
“Founded in Denver, Colorado, in 2012, we are a highly experienced team of designers and developers delivering exceptional software solutions.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Mementiamementia.comHQ: Carlisle, PA, United StatesReported employees: 1-10 | Carlisle, PA, United States | 1-10 | Exact match | 6 contacts → |
“At Mementia, we deliver only the highest quality software solutions.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 22 of 210 company matches
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Open source development firms: 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
210 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 210 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 ↗
Questions about this company list
What does Exact match mean for open source development firms?
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 open source development firms did RevenueBase find based in the United States?
The saved snapshot records 210 matching company records, 28,878 tracked contacts and 12,601 verified emails. The public preview displays 22 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.
Related lists
Open source development firms by geography
- Open source development firms based in France
- Open source development firms based in Germany
- Open source development firms based in India
- Open source development firms based in Italy
- Open source development firms based in the Netherlands
- Open source development firms based in Spain
- Open source development firms based in the United Kingdom
Cite this list
RevenueBase Data Team. Top 22 open source development firms based in the United States. Snapshot: November 6, 2026. https://revenuebase.ai/companies/open-source-development-firms/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
- Open source development firms based in France
- Open source development firms based in Germany
- Open source development firms based in India
- Open source development firms based in Italy
- Open source development firms based in the Netherlands
- Open source development firms based in Spain
Company intelligence · public preview
Top 22 open source development firms based in the United States
RevenueBase records 210 matching company records for open source development firms based in the United States, with 28,878 tracked contacts and 12,601 verified work emails.
This public preview shows 22 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 22 open source development firms 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 | RED HATredhat.com HQ: Raleigh, NC, United StatesReported employees: 10001+ | Raleigh, NC, United States | 10001+ | Exact match | 25,149 contacts → |
“Red Hat is the world’s leading provider of enterprise open source solutions, using a community-powered approach to deliver high-performing Linux, hybrid cloud, edge, and…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | The Apache Software Foundationapache.org HQ: Wilmington, DE, United StatesReported employees: 5,001-10,000 | Wilmington, DE, United States | 5,001-10,000 | Exact match | 1,207 contacts → |
“The Apache Software Foundation (ASF) is the global home for open source software, powering some of the world’s most ubiquitous software projects including Apache Airflow, Apache…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | The Linux Foundationlinuxfoundation.org HQ: San Francisco, CA, United StatesReported employees: 201-500 | San Francisco, CA, United States | 201-500 | Exact match | 866 contacts → |
“The Linux Foundation is the organization of choice for the world's top developers and companies to build ecosystems that accelerate open technology development and commercial…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Altamira Technologies Corporationaltamiracorp.com HQ: Mclean, MD, United StatesReported employees: 501-1,000 | Mclean, MD, United States | 501-1,000 | Exact match | 378 contacts → |
“Altamira Technologies, a Parsons Company, is a top open source technology company in the national security space.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Quansightquansight.com HQ: Austin, TX, United StatesReported employees: 11-50 | Austin, TX, United States | 11-50 | Exact match | 44 contacts → |
“Quansight catalyzes sustainable innovation by connecting enterprise needs with community driven open source.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Hosstedhossted.com HQ: Middletown, DE, United StatesReported employees: 11-50 | Middletown, DE, United States | 11-50 | Exact match | 27 contacts → |
“Enterprise support for your entire stack powered by a self-hosted AI agent that runs entirely inside your perimeter, with human experts one escalation away.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Quimbik, INCquimbik.com HQ: San Francisco, CA, United StatesReported employees: 11-50 | San Francisco, CA, United States | 11-50 | Exact match | 25 contacts → |
“Quimbik is a software engineering company focused on web applications (solutions).” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Lucidus Solutionslucidus.com HQ: Baltimore, United StatesReported employees: 11-50 | Baltimore, United States | 11-50 | Exact match | 16 contacts → |
“Lucidus Solutions (Lucidus) is an Information Technology company that has earned a reputation for providing exceptional services and support to clients since our founding in 2006.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Zivtechzivtech.com HQ: Philadelphia, PA, United StatesReported employees: 11-50 | Philadelphia, PA, United States | 11-50 | Exact match | 13 contacts → |
“Founded in 2008, Zivtech is a full-service web design and development agency that specializes in open-source software.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Gloscon Solutions PVT Limitedgloscon.com HQ: Fort Worth, TX, United StatesReported employees: 11-50 | Fort Worth, TX, United States | 11-50 | Exact match | 12 contacts → |
“Gloscon is an Open Source consulting company specializing in Drupal, Ruby on Rails, Hadoop and Mobile development.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Unison Computingunison.cloud HQ: Somerville, MA, United StatesReported employees: 1-10 | Somerville, MA, United States | 1-10 | Exact match | 11 contacts → |
“Unison Computing is a Delaware public benefit corp.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Nonadyne,incnonadyne.com HQ: Wixom, MI, United StatesReported employees: 1-10 | Wixom, MI, United States | 1-10 | Exact match | 11 contacts → |
“Nonadyne Inc was founded in 2013.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Brainfoodbrainfood.com HQ: Dallas, TX, United StatesReported employees: 11-50 | Dallas, TX, United States | 11-50 | Exact match | 9 contacts → |
“Responding to these goals we have assembled a world-class team of developers who bring a unique mix of experience in Open Source development, building communities around…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Interaticainteratica.com HQ: Walnut, CA, United StatesReported employees: 11-50 | Walnut, CA, United States | 11-50 | Exact match | 9 contacts → |
“We offer the same professional services as large software development firms, but at rates that are competitive on an international level.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Infinity Interactiveiinteractive.com HQ: Manhasset, NY, United StatesReported employees: 11-50 | Manhasset, NY, United States | 11-50 | Exact match | 8 contacts → |
“We are Infinity.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Freelockfreelock.com HQ: Seattle, WA, United StatesReported employees: 11-50 | Seattle, WA, United States | 11-50 | Exact match | 8 contacts → |
“Since we've built on open source: not as a compromise, but as a conviction.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Mediacurrentmediacurrent.com HQ: Alpharetta, GA, United StatesReported employees: 51-200 | Alpharetta, GA, United States | 51-200 | Exact match | 8 contacts → |
“We are an Open Source Product Agency defining, designing and delivering websites, platforms and digital experiences.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Extra Nerdsextranerds.com HQ: Athens, OH, United StatesReported employees: 1-10 | Athens, OH, United States | 1-10 | Exact match | 7 contacts → |
“We are a team of diverse and highly skilled freelance Information Technology (IT) professionals sourced from various locations across the United States and managed from our…” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Little Bear Labslittlebearlabs.io HQ: Boulder, CO, United StatesReported employees: 11-50 | Boulder, CO, United States | 11-50 | Exact match | 7 contacts → |
“At Little Bear Labs, we channel your big ideas into real-world software products.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Savantly LLCsavantly.net HQ: Fort Worth, TX, United StatesReported employees: 1-10 | Fort Worth, TX, United States | 1-10 | Exact match | 7 contacts → |
“Innovative Software Solutions for Your Business.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Epic Appsepicbusinessapps.com HQ: Greenwood Village, CO, United StatesReported employees: 11-50 | Greenwood Village, CO, United States | 11-50 | Exact match | 7 contacts → |
“Founded in Denver, Colorado, in 2012, we are a highly experienced team of designers and developers delivering exceptional software solutions.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Mementiamementia.com HQ: Carlisle, PA, United StatesReported employees: 1-10 | Carlisle, PA, United States | 1-10 | Exact match | 6 contacts → |
“At Mementia, we deliver only the highest quality software solutions.” Recorded description excerpt · November 6, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 22 of 210 company matches
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Open source development firms: 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
210 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 210 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 ↗
Questions about this company list
What does Exact match mean for open source development firms?
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 open source development firms did RevenueBase find based in the United States?
The saved snapshot records 210 matching company records, 28,878 tracked contacts and 12,601 verified emails. The public preview displays 22 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.
Related lists
Open source development firms by geography
- Open source development firms based in France
- Open source development firms based in Germany
- Open source development firms based in India
- Open source development firms based in Italy
- Open source development firms based in the Netherlands
- Open source development firms based in Spain
- Open source development firms based in the United Kingdom
Cite this list
RevenueBase Data Team. Top 22 open source development firms based in the United States. Snapshot: November 6, 2026. https://revenuebase.ai/companies/open-source-development-firms/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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- Open source development firms based in France
- Open source development firms based in Germany
- Open source development firms based in India
- Open source development firms based in Italy
- Open source development firms based in the Netherlands
- Open source development firms based in Spain