Company lists · Data refreshed October 2026
Top 25 Open source software companies worldwide
RevenueBase identified 934 company matches for open source software companies worldwide as of October 2026 and tracks 35,839 professional contacts across them, including 13,083 with verified work emails. The United States is the largest market and London the largest hub.
This list covers company matches for open source software companies 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 October 1, 2026. Country and city lists for open source software companies 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 open source software companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 24,404 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 · Oct 1, 2026 · View company records in RevenueBase | |||||
| 2 | 1,512 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 · Oct 1, 2026 · View company records in RevenueBase | |||||
| 3 | 843 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 · Oct 1, 2026 · View company records in RevenueBase | |||||
| 4 | 669 contacts → | ||||
Exact match “Webkul is one of the largest self-created open-source marketplaces in the world.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 5 | 140 contacts → | ||||
Exact match “Software DELSOL, S.A.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 6 | 138 contacts → | ||||
Exact match “Notre Mission est depuis 20 ans, d’inventer et de développer les Logiciels Libres et Open Source éthiques (ce que nous appelons la « GoodTech ») pour participer à changer le Monde…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 7 | 122 contacts → | ||||
Exact match “Collabora is a global consultancy specializing in delivering the benefits of Open Source software to the commercial world.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 8 | 104 contacts → | ||||
Exact match “Irontec es una empresa ubicada en Bilbao, en un centro empresarial con gran presencia de empresas tecnológicas a orillas de la ría del Nervión.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 9 | 103 contacts → | ||||
Exact match “Forem provides open source software that empowers community.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 10 | 94 contacts → | ||||
Exact match “Contribute to the best open-source projects.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 11 | 91 contacts → | ||||
Exact match “Frappe creates 100% open source software to help businesses grow sustainably.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 12 | 78 contacts → | ||||
Exact match “B1 Systems GmbH is a provider of Linux/Open Source consulting, training, development & support services.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 13 | 75 contacts → | ||||
Exact match “Zestbrains pvt ltd is a Leading software development company based in India catering to the enterprise solutions worldwide.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 14 | 66 contacts → | ||||
Exact match “Savoir-faire Linux® is an outstanding team of 50 Free Software consultants based in Montreal and Rennes.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 15 | 45 contacts → | ||||
Exact match “Quansight catalyzes sustainable innovation by connecting enterprise needs with community driven open source.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 16 | 41 contacts → | ||||
Exact match “Linux® Polska - we are a Polish IT company founded in 2009.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 17 | 41 contacts → | ||||
Exact match “Since 2007 We have been providing cutting-edge enterprise solutions with free and open source softwares.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 18 | 41 contacts → | ||||
Exact match “Ozgur Software Inc.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 19 | 40 contacts → | ||||
Exact match “We help developers and company create fast, resource-efficient, secure infrastructure applications, targeting a wide range of deployment platform: from cloud to IoT, through…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 20 | 39 contacts → | ||||
Exact match “Open Source Solutions is your leading partner and service provider for various Infrastructure-based open source solutions in Saudi Arabia.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 21 | 38 contacts → | ||||
Exact match “Der Anspruch der synyx GmbH & Co.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 22 | 36 contacts → | ||||
Exact match “Kaleidos is an international Madrid-based venture infused with private capital.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 23 | 35 contacts → | ||||
Exact match “We are the best pathfinder to enhance and accelerate your business goals through our range of services.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 24 | 34 contacts → | ||||
Exact match “Cytrion started in 2005 with a sole vision of making people's life easier by providing them affordable solutions through software.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase | |||||
| 25 | 33 contacts → | ||||
Exact match “Lyra Infosystems is a trusted leader in enterprise open source solutions, dedicated to empowering businesses worldwide to thrive in today's dynamic digital landscape.” Recorded in the RevenueBase company graph · Oct 1, 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 software companies”. 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 934 open source software companies worldwide
See the full list, filter by size, metro and specialty, and access 13,083 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Open source software companies worldwide at a glance
As of Oct 1, 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 open source software companies are linked below.
- What qualifies
- Company records worldwide whose business descriptions match “open source software companies” 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 13,083 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 1, 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.
Open source software companies by location
7 lists · largest firstEvery Open source software companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Open source software companies based in the United States101
- Open source software companies based in India71
- Open source software companies based in France60
- Open source software companies based in Brazil39
- Open source software companies based in Germany33
- Open source software companies based in the Netherlands30
- Open source software companies based in Canada29
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 software companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many open source software companies are there worldwide?
RevenueBase identified 934 company matches for open source software companies worldwide 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?
RED HAT tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which country has the most open source software companies?
The United States leads with 101 companies, followed by India (71) and France (60). Every open source software companies list by country and city is linked on this page.
Which city has the most open source software companies?
London leads with 18 company records, followed by Paris (17) and Berlin (11).
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 13,083 professional contacts with verified work emails tracked across these 934 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 1, 2026.
Ready to reach these companies? Verified emails and direct dials for all 934 open source software companies 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 open source software companies worldwide
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 934 matching company records for open source software companies worldwide, with 35,839 tracked contacts and 13,083 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 1, 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 open source software companies 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 |  RED HATredhat.comHQ: Raleigh, NC, United StatesReported employees: 10001+ | Raleigh, NC, United States | 10001+ | Exact match | 24,404 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 · October 1, 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 | 1,512 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 · October 1, 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 | 843 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 · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Webkulwebkul.comHQ: Noida, IndiaReported employees: 501-1,000 | Noida, India | 501-1,000 | Exact match | 669 contacts → |
“Webkul is one of the largest self-created open-source marketplaces in the world.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Teamsystem Software Delsolsdelsol.comHQ: Mengíbar, SpainReported employees: 51-200 | Mengíbar, Spain | 51-200 | Exact match | 140 contacts → |
“Software DELSOL, S.A.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Linagoralinagora.comHQ: Issy-les-moulineaux, FranceReported employees: 201-500 | Issy-les-moulineaux, France | 201-500 | Exact match | 138 contacts → |
“Notre Mission est depuis 20 ans, d’inventer et de développer les Logiciels Libres et Open Source éthiques (ce que nous appelons la « GoodTech ») pour participer à changer le Monde…” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Collaboracollabora.comHQ: Cambridge, United KingdomReported employees: 51-200 | Cambridge, United Kingdom | 51-200 | Exact match | 122 contacts → |
“Collabora is a global consultancy specializing in delivering the benefits of Open Source software to the commercial world.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Irontecirontec.comHQ: Bilbao, SpainReported employees: 51-200 | Bilbao, Spain | 51-200 | Exact match | 104 contacts → |
“Irontec es una empresa ubicada en Bilbao, en un centro empresarial con gran presencia de empresas tecnológicas a orillas de la ría del Nervión.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | FOREMforem.com HQ: Distributed Across The World, United StatesReported employees: 11-50 | Distributed Across The World, United States | 11-50 | Exact match | 103 contacts → |
“Forem provides open source software that empowers community.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Only Dustonlydust.xyz HQ: United StatesReported employees: 11-50 | United States | 11-50 | Exact match | 94 contacts → |
“Contribute to the best open-source projects.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Frappefrappe.ioHQ: Mumbai, IndiaReported employees: 51-200 | Mumbai, India | 51-200 | Exact match | 91 contacts → |
“Frappe creates 100% open source software to help businesses grow sustainably.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  B1 Systemsb1-systems.deHQ: Vohburg, GermanyReported employees: 51-200 | Vohburg, Germany | 51-200 | Exact match | 78 contacts → |
“B1 Systems GmbH is a provider of Linux/Open Source consulting, training, development & support services.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Zestbrains Pvt. LTDzestbrains.comHQ: Ahmedabad, IndiaReported employees: 51-200 | Ahmedabad, India | 51-200 | Exact match | 75 contacts → |
“Zestbrains pvt ltd is a Leading software development company based in India catering to the enterprise solutions worldwide.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Savoir-Faire Linuxsavoirfairelinux.comHQ: Montréal, QC, CanadaReported employees: 51-200 | Montréal, QC, Canada | 51-200 | Exact match | 66 contacts → |
“Savoir-faire Linux® is an outstanding team of 50 Free Software consultants based in Montreal and Rennes.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Quansightquansight.comHQ: Austin, TX, United StatesReported employees: 11-50 | Austin, TX, United States | 11-50 | Exact match | 45 contacts → |
“Quansight catalyzes sustainable innovation by connecting enterprise needs with community driven open source.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Linux Polska Sp. Z O.Olinuxpolska.plHQ: Warsaw, PolandReported employees: 51-200 | Warsaw, Poland | 51-200 | Exact match | 41 contacts → |
“Linux® Polska - we are a Polish IT company founded in 2009.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Profelisprofelis.com.trHQ: Ankara, TürkiyeReported employees: 11-50 | Ankara, Türkiye | 11-50 | Exact match | 41 contacts → |
“Since 2007 We have been providing cutting-edge enterprise solutions with free and open source softwares.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Özgür Yazılım A.Şozguryazilim.com.trHQ: İstanbul, TürkiyeReported employees: 11-50 | İstanbul, Türkiye | 11-50 | Exact match | 41 contacts → |
“Ozgur Software Inc.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Taridestarides.comHQ: Paris, FranceReported employees: 11-50 | Paris, France | 11-50 | Exact match | 40 contacts → |
“We help developers and company create fast, resource-efficient, secure infrastructure applications, targeting a wide range of deployment platform: from cloud to IoT, through…” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Open Source Solutionsopensource.sa HQ: Dhahran, Saudi ArabiaReported employees: 11-50 | Dhahran, Saudi Arabia | 11-50 | Exact match | 39 contacts → |
“Open Source Solutions is your leading partner and service provider for various Infrastructure-based open source solutions in Saudi Arabia.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Synyx Gmbh & Co. KGsynyx.deHQ: Karlsruhe, GermanyReported employees: 51-200 | Karlsruhe, Germany | 51-200 | Exact match | 38 contacts → |
“Der Anspruch der synyx GmbH & Co.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Kaleidoskaleidos.net HQ: Madrid, SpainReported employees: 11-50 | Madrid, Spain | 11-50 | Exact match | 36 contacts → |
“Kaleidos is an international Madrid-based venture infused with private capital.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Linux LABlinuxlab.pro HQ: Yangon, MyanmarReported employees: 11-50 | Yangon, Myanmar | 11-50 | Exact match | 35 contacts → |
“We are the best pathfinder to enhance and accelerate your business goals through our range of services.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Cytrion Software Solutions PVT LTDcytrion.comHQ: Hydeabad, IndiaReported employees: 11-50 | Hydeabad, India | 11-50 | Exact match | 34 contacts → |
“Cytrion started in 2005 with a sole vision of making people's life easier by providing them affordable solutions through software.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Lyra Infosystemslyrainfo.comHQ: Bangalore, IndiaReported employees: 51-200 | Bangalore, India | 51-200 | Exact match | 33 contacts → |
“Lyra Infosystems is a trusted leader in enterprise open source solutions, dedicated to empowering businesses worldwide to thrive in today's dynamic digital landscape.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 934 company matches
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Open source software companies: dataset insights
October 1, 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
930 records in the displayed employee bands.
4 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 934 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 1, 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 ↗
Open source software companies by location
7 lists · largest firstEvery Open source software companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Open source software companies based in the United States101
- Open source software companies based in India71
- Open source software companies based in France60
- Open source software companies based in Brazil39
- Open source software companies based in Germany33
- Open source software companies based in the Netherlands30
- Open source software companies based in Canada29
Questions about this company list
What does Exact match mean for open source software companies?
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 software companies did RevenueBase find worldwide?
The saved snapshot records 934 matching company records, 35,839 tracked contacts and 13,083 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 1, 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
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Cite this list
RevenueBase Data Team. Top 25 open source software companies worldwide. Snapshot: October 1, 2026. https://revenuebase.ai/companies/browse/open-source-software-companies.
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 open source software companies worldwide
RevenueBase records 934 matching company records for open source software companies worldwide, with 35,839 tracked contacts and 13,083 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 1, 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 open source software companies 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 | RED HATredhat.com HQ: Raleigh, NC, United StatesReported employees: 10001+ | Raleigh, NC, United States | 10001+ | Exact match | 24,404 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 · October 1, 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 | 1,512 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 · October 1, 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 | 843 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 · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Webkulwebkul.com HQ: Noida, IndiaReported employees: 501-1,000 | Noida, India | 501-1,000 | Exact match | 669 contacts → |
“Webkul is one of the largest self-created open-source marketplaces in the world.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Teamsystem Software Delsolsdelsol.com HQ: Mengíbar, SpainReported employees: 51-200 | Mengíbar, Spain | 51-200 | Exact match | 140 contacts → |
“Software DELSOL, S.A.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Linagoralinagora.com HQ: Issy-les-moulineaux, FranceReported employees: 201-500 | Issy-les-moulineaux, France | 201-500 | Exact match | 138 contacts → |
“Notre Mission est depuis 20 ans, d’inventer et de développer les Logiciels Libres et Open Source éthiques (ce que nous appelons la « GoodTech ») pour participer à changer le Monde…” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Collaboracollabora.com HQ: Cambridge, United KingdomReported employees: 51-200 | Cambridge, United Kingdom | 51-200 | Exact match | 122 contacts → |
“Collabora is a global consultancy specializing in delivering the benefits of Open Source software to the commercial world.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Irontecirontec.com HQ: Bilbao, SpainReported employees: 51-200 | Bilbao, Spain | 51-200 | Exact match | 104 contacts → |
“Irontec es una empresa ubicada en Bilbao, en un centro empresarial con gran presencia de empresas tecnológicas a orillas de la ría del Nervión.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | FOREMforem.com HQ: Distributed Across The World, United StatesReported employees: 11-50 | Distributed Across The World, United States | 11-50 | Exact match | 103 contacts → |
“Forem provides open source software that empowers community.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Only Dustonlydust.xyz HQ: United StatesReported employees: 11-50 | United States | 11-50 | Exact match | 94 contacts → |
“Contribute to the best open-source projects.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Frappefrappe.io HQ: Mumbai, IndiaReported employees: 51-200 | Mumbai, India | 51-200 | Exact match | 91 contacts → |
“Frappe creates 100% open source software to help businesses grow sustainably.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | B1 Systemsb1-systems.de HQ: Vohburg, GermanyReported employees: 51-200 | Vohburg, Germany | 51-200 | Exact match | 78 contacts → |
“B1 Systems GmbH is a provider of Linux/Open Source consulting, training, development & support services.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Zestbrains Pvt. LTDzestbrains.com HQ: Ahmedabad, IndiaReported employees: 51-200 | Ahmedabad, India | 51-200 | Exact match | 75 contacts → |
“Zestbrains pvt ltd is a Leading software development company based in India catering to the enterprise solutions worldwide.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Savoir-Faire Linuxsavoirfairelinux.com HQ: Montréal, QC, CanadaReported employees: 51-200 | Montréal, QC, Canada | 51-200 | Exact match | 66 contacts → |
“Savoir-faire Linux® is an outstanding team of 50 Free Software consultants based in Montreal and Rennes.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Quansightquansight.com HQ: Austin, TX, United StatesReported employees: 11-50 | Austin, TX, United States | 11-50 | Exact match | 45 contacts → |
“Quansight catalyzes sustainable innovation by connecting enterprise needs with community driven open source.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Linux Polska Sp. Z O.Olinuxpolska.pl HQ: Warsaw, PolandReported employees: 51-200 | Warsaw, Poland | 51-200 | Exact match | 41 contacts → |
“Linux® Polska - we are a Polish IT company founded in 2009.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Profelisprofelis.com.tr HQ: Ankara, TürkiyeReported employees: 11-50 | Ankara, Türkiye | 11-50 | Exact match | 41 contacts → |
“Since 2007 We have been providing cutting-edge enterprise solutions with free and open source softwares.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Özgür Yazılım A.Şozguryazilim.com.tr HQ: İstanbul, TürkiyeReported employees: 11-50 | İstanbul, Türkiye | 11-50 | Exact match | 41 contacts → |
“Ozgur Software Inc.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Taridestarides.com HQ: Paris, FranceReported employees: 11-50 | Paris, France | 11-50 | Exact match | 40 contacts → |
“We help developers and company create fast, resource-efficient, secure infrastructure applications, targeting a wide range of deployment platform: from cloud to IoT, through…” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Open Source Solutionsopensource.sa HQ: Dhahran, Saudi ArabiaReported employees: 11-50 | Dhahran, Saudi Arabia | 11-50 | Exact match | 39 contacts → |
“Open Source Solutions is your leading partner and service provider for various Infrastructure-based open source solutions in Saudi Arabia.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Synyx Gmbh & Co. KGsynyx.de HQ: Karlsruhe, GermanyReported employees: 51-200 | Karlsruhe, Germany | 51-200 | Exact match | 38 contacts → |
“Der Anspruch der synyx GmbH & Co.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Kaleidoskaleidos.net HQ: Madrid, SpainReported employees: 11-50 | Madrid, Spain | 11-50 | Exact match | 36 contacts → |
“Kaleidos is an international Madrid-based venture infused with private capital.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Linux LABlinuxlab.pro HQ: Yangon, MyanmarReported employees: 11-50 | Yangon, Myanmar | 11-50 | Exact match | 35 contacts → |
“We are the best pathfinder to enhance and accelerate your business goals through our range of services.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Cytrion Software Solutions PVT LTDcytrion.com HQ: Hydeabad, IndiaReported employees: 11-50 | Hydeabad, India | 11-50 | Exact match | 34 contacts → |
“Cytrion started in 2005 with a sole vision of making people's life easier by providing them affordable solutions through software.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Lyra Infosystemslyrainfo.com HQ: Bangalore, IndiaReported employees: 51-200 | Bangalore, India | 51-200 | Exact match | 33 contacts → |
“Lyra Infosystems is a trusted leader in enterprise open source solutions, dedicated to empowering businesses worldwide to thrive in today's dynamic digital landscape.” Recorded description excerpt · October 1, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 934 company matches
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Open source software companies: dataset insights
October 1, 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
930 records in the displayed employee bands.
4 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 934 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 1, 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 ↗
Open source software companies by location
7 lists · largest firstEvery Open source software companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Open source software companies based in the United States101
- Open source software companies based in India71
- Open source software companies based in France60
- Open source software companies based in Brazil39
- Open source software companies based in Germany33
- Open source software companies based in the Netherlands30
- Open source software companies based in Canada29
Questions about this company list
What does Exact match mean for open source software companies?
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 software companies did RevenueBase find worldwide?
The saved snapshot records 934 matching company records, 35,839 tracked contacts and 13,083 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 1, 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
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Cite this list
RevenueBase Data Team. Top 25 open source software companies worldwide. Snapshot: October 1, 2026. https://revenuebase.ai/companies/browse/open-source-software-companies.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗