Company lists · Data refreshed September 2026
Top 9 Open source software companies based in Germany
RevenueBase identified 33 company matches for open source software companies associated with Germany as of September 2026 and tracks 420 professional contacts across them, including 65 with verified work emails and 21 with mobile numbers. Berlin is the largest hub.
This list covers company matches for open source software companies associated with Germany, 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 September 5, 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 9 largest open source software companies based in Germany
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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 · Sep 5, 2026 · View company records in RevenueBase | |||||
| 2 | 38 contacts → | ||||
Exact match “Der Anspruch der synyx GmbH & Co.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 3 | 18 contacts → | ||||
Exact match “Die K&K Software AG aus Gerolzhofen existiert seit dem Jahr und ist in den Bereichen Open Source ERP (ERPNext), Softwareentwicklung, Internetanwendungen und Netzwerkbetreuung…” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 4 | 14 contacts → | ||||
Exact match “ECC Digital baut Open-Source-Software, die nach dem Projekt nicht im Regal landet.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 5 | 8 contacts → | ||||
Exact match “Open Elements is an IT company whose main focus is on the two points of Open Source Software (OSS) and Java.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 6 | 6 contacts → | ||||
Exact match “Our Open-Source is part of our company.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 7 | 6 contacts → | ||||
Exact match “effective WEBWORK GmbH is a company that offers consultancy work and development support for open source software solutions in libraries, schools and universities.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 8 | 2 contacts → | ||||
Exact match “Wir sind spezialisiert auf Entwicklung und Beratung in verschiedensten Softwarebereichen.” Recorded in the RevenueBase company graph · Sep 5, 2026 · View company records in RevenueBase | |||||
| 9 | 2 contacts → | ||||
Exact match “Open Source und Cloud-Computing für agile Business Applications Solutions.” Recorded in the RevenueBase company graph · Sep 5, 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 9 of 33 open source software companies based in Germany
See the full list, filter by size, metro and specialty, and access 65 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Open source software companies based in Germany at a glance
As of Sep 5, 2026Companies by employee count
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
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 Germany 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. 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 65 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 September 5, 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 software companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many open source software companies are there based in Germany?
RevenueBase identified 33 company matches for open source software companies associated with Germany as of September 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?
B1 Systems tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most open source software companies?
Berlin leads with 11 company records, followed by Hamburg (3) and Kiel (2).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 65 professional contacts with verified work emails tracked across these 33 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 September 5, 2026.
Ready to reach these companies? Verified emails and direct dials for all 33 open source software companies based in Germany. Start with a free account, no credit card.
Download this list →Related lists
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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- Lists A-Z
- New lists
- Open source software companies based in the United States
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Company intelligence · public preview
Top 9 open source software companies based in Germany
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 33 matching company records for open source software companies based in Germany, with 420 tracked contacts and 65 verified work emails.
This public preview shows 9 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 5, 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 9 open source software companies based in Germany
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 |  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 · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  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 · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  K&k Software AGkk-software.deHQ: Gerolzhofen, GermanyReported employees: 11-50 | Gerolzhofen, Germany | 11-50 | Exact match | 18 contacts → |
“Die K&K Software AG aus Gerolzhofen existiert seit dem Jahr und ist in den Bereichen Open Source ERP (ERPNext), Softwareentwicklung, Internetanwendungen und Netzwerkbetreuung…” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  ECC Digitalecc-digital.deHQ: Kiel, GermanyReported employees: 11-50 | Kiel, Germany | 11-50 | Exact match | 14 contacts → |
“ECC Digital baut Open-Source-Software, die nach dem Projekt nicht im Regal landet.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Open Elementsopen-elements.comHQ: Leverkusen, GermanyReported employees: 1-10 | Leverkusen, Germany | 1-10 | Exact match | 8 contacts → |
“Open Elements is an IT company whose main focus is on the two points of Open Source Software (OSS) and Java.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Cinovo AGcinovo.deHQ: Stuttgart, GermanyReported employees: 1-10 | Stuttgart, Germany | 1-10 | Exact match | 6 contacts → |
“Our Open-Source is part of our company.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Effective Webwork Gmbheffective-webwork.deHQ: Hamburg, GermanyReported employees: 11-50 | Hamburg, Germany | 11-50 | Exact match | 6 contacts → |
“effective WEBWORK GmbH is a company that offers consultancy work and development support for open source software solutions in libraries, schools and universities.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Epnw Gmbhepnw.euHQ: Schorndorf, GermanyReported employees: 1-10 | Schorndorf, Germany | 1-10 | Exact match | 2 contacts → |
“Wir sind spezialisiert auf Entwicklung und Beratung in verschiedensten Softwarebereichen.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Adventos Gmbhadventos.deHQ: Hamburg, GermanyReported employees: 1-10 | Hamburg, Germany | 1-10 | Exact match | 2 contacts → |
“Open Source und Cloud-Computing für agile Business Applications Solutions.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 9 of 33 company matches
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Open source software companies: dataset insights
September 5, 2026These summaries describe recorded coverage in this saved dataset. Coverage describes records in RevenueBase, rather than a census of every business in this market.
Reported company sizes
32 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
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.
Coverage describes records in RevenueBase, rather than a census of every business in this market.
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: September 5, 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 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 based in Germany?
The saved snapshot records 33 matching company records, 420 tracked contacts and 65 verified emails. The public preview displays 9 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: September 5, 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 software companies by geography
- Open source software companies based in the United States
- Open source software companies based in France
- Open source software companies based in Brazil
- Open source software companies based in the Netherlands
- Open source software companies based in Canada
- Open source software companies based in India
Cite this list
RevenueBase Data Team. Top 9 open source software companies based in Germany. Snapshot: September 5, 2026. https://revenuebase.ai/companies/open-source-software-companies/germany.
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 software companies based in the United States
- Open source software companies based in France
- Open source software companies based in Brazil
- Open source software companies based in the Netherlands
- Open source software companies based in Canada
- Open source software companies based in India
Company intelligence · public preview
Top 9 open source software companies based in Germany
RevenueBase records 33 matching company records for open source software companies based in Germany, with 420 tracked contacts and 65 verified work emails.
This public preview shows 9 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 5, 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 9 open source software companies based in Germany
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 | 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 · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | 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 · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | K&k Software AGkk-software.de HQ: Gerolzhofen, GermanyReported employees: 11-50 | Gerolzhofen, Germany | 11-50 | Exact match | 18 contacts → |
“Die K&K Software AG aus Gerolzhofen existiert seit dem Jahr und ist in den Bereichen Open Source ERP (ERPNext), Softwareentwicklung, Internetanwendungen und Netzwerkbetreuung…” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | ECC Digitalecc-digital.de HQ: Kiel, GermanyReported employees: 11-50 | Kiel, Germany | 11-50 | Exact match | 14 contacts → |
“ECC Digital baut Open-Source-Software, die nach dem Projekt nicht im Regal landet.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Open Elementsopen-elements.com HQ: Leverkusen, GermanyReported employees: 1-10 | Leverkusen, Germany | 1-10 | Exact match | 8 contacts → |
“Open Elements is an IT company whose main focus is on the two points of Open Source Software (OSS) and Java.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Cinovo AGcinovo.de HQ: Stuttgart, GermanyReported employees: 1-10 | Stuttgart, Germany | 1-10 | Exact match | 6 contacts → |
“Our Open-Source is part of our company.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Effective Webwork Gmbheffective-webwork.de HQ: Hamburg, GermanyReported employees: 11-50 | Hamburg, Germany | 11-50 | Exact match | 6 contacts → |
“effective WEBWORK GmbH is a company that offers consultancy work and development support for open source software solutions in libraries, schools and universities.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Epnw Gmbhepnw.eu HQ: Schorndorf, GermanyReported employees: 1-10 | Schorndorf, Germany | 1-10 | Exact match | 2 contacts → |
“Wir sind spezialisiert auf Entwicklung und Beratung in verschiedensten Softwarebereichen.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Adventos Gmbhadventos.de HQ: Hamburg, GermanyReported employees: 1-10 | Hamburg, Germany | 1-10 | Exact match | 2 contacts → |
“Open Source und Cloud-Computing für agile Business Applications Solutions.” Recorded description excerpt · September 5, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 9 of 33 company matches
Build a targeted audience, find relevant contacts and export available records to your workflow.
Free signup · 500 credits · limited free results
Open source software companies: dataset insights
September 5, 2026These summaries describe recorded coverage in this saved dataset. Coverage describes records in RevenueBase, rather than a census of every business in this market.
Reported company sizes
32 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Freshness & accuracy
How recently the business emails on this list were verified
Email last verified
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.
Coverage describes records in RevenueBase, rather than a census of every business in this market.
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: September 5, 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 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 based in Germany?
The saved snapshot records 33 matching company records, 420 tracked contacts and 65 verified emails. The public preview displays 9 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: September 5, 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 software companies by geography
- Open source software companies based in the United States
- Open source software companies based in France
- Open source software companies based in Brazil
- Open source software companies based in the Netherlands
- Open source software companies based in Canada
- Open source software companies based in India
Cite this list
RevenueBase Data Team. Top 9 open source software companies based in Germany. Snapshot: September 5, 2026. https://revenuebase.ai/companies/open-source-software-companies/germany.
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 software companies based in the United States
- Open source software companies based in France
- Open source software companies based in Brazil
- Open source software companies based in the Netherlands
- Open source software companies based in Canada
- Open source software companies based in India