Company lists · Data refreshed November 2026

Top 25 Open source project management software companies worldwide

RevenueBase identified 990 company matches for open source project management software companies worldwide as of November 2026 and tracks 27,604 professional contacts across them, including 13,500 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for open source project management 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 November 5, 2026. Country and city lists for open source project management 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 5, 2026 How this list was built
990Companies
27,604Contacts tracked
13,500Verified emails
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The 25 largest open source project management software companies worldwide

Ranked by team size
Top 25 of 990 company matches for open source project management software companies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 5, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchSydney, CA, TürkiyeHQ recorded Nov 5, 202610001+19,288 contacts →

Exact match

“Atlassian powers the collaboration that helps teams accomplish what would otherwise be impossible alone.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
2Exact matchNoida, IndiaHQ recorded Nov 5, 2026501-1,000666 contacts →

Exact match

“Webkul is one of the largest self-created open-source marketplaces in the world.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
3Exact matchPalo Alto, CA, United StatesHQ recorded Nov 5, 2026201-500415 contacts →

Exact match

“We design our software to fit the needs of modern teams.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
4Exact matchBlackpool, United KingdomHQ recorded Nov 5, 2026201-500309 contacts →

Exact match

“Combining powerful project management and easily streamlined operations - we’re the only platform built for managing client projects, profitably.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
5Exact matchSan Francisco, CA, United StatesHQ recorded Nov 5, 202651-200245 contacts →

Exact match

“At Linear, we are on a mission to bring magic back to software.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
6Exact matchTuebingen, GermanyHQ recorded Nov 5, 2026201-500176 contacts →

Exact match

“Founded in Tübingen, Germany in itdesign is an innovative and internationally operating software company.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
7Exact matchMunich, GermanyHQ recorded Nov 5, 202651-200158 contacts →

Exact match

“cplace is a modern software platform for project and portfolio management (PPM).”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
8Exact matchMumbai, IndiaHQ recorded Nov 5, 202651-200123 contacts →

Exact match

“Frappe creates 100% open source software to help businesses grow sustainably.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
9Exact matchTallinn, EstoniaHQ recorded Nov 5, 202651-200123 contacts →

Exact match

“Every capacity view, profitability report, and planning decision is only as good as the time data underneath it.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
10Exact matchSan Diego, United StatesHQ recorded Nov 5, 2026201-500111 contacts →

Exact match

“Sciforma is an award-winning provider of portfolio and project management software.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
11Exact matchAustin, United StatesHQ recorded Nov 5, 202611-5080 contacts →

Exact match

“ProjectManager is an award-winning, online project management software.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
12Exact matchPune, IndiaHQ recorded Nov 5, 202651-20078 contacts →

Exact match

“Celoxis is world's leading project management & PPM software.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13Exact matchCalifornia And Hyderabad, IndiaHQ recorded Nov 5, 202651-20076 contacts →

Exact match

“Plane is the work infrastructure for humans and AI agent era: one work graph that humans and AI agents operate as peers, structured enough for machines to read and reason over…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
14Exact matchGothenburg, SwedenHQ recorded Nov 5, 202651-20074 contacts →

Exact match

“Since 2001, Antura has been successfully supplying organisations with the Antura Projects PPM tool – a complete solution for project, portfolio and resource management.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
15Exact matchNew York, NY, United StatesHQ recorded Nov 5, 202651-20074 contacts →

Exact match

“We help teams move faster.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
16Exact matchSan Jose, CA, United StatesHQ recorded Nov 5, 2026201-50074 contacts →

Exact match

“ONES.com is an all-in-one project management platform that helps teams enhance development efficiency, ensure delivery quality, and foster seamless collaboration.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
17Exact matchMontclair, United StatesHQ recorded Nov 5, 202651-20069 contacts →

Exact match

“Taskworld is the world's first integrated project management platform that makes it easy to scale your organization.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
18Exact matchMinatoku, JapanHQ recorded Nov 5, 202651-20062 contacts →

Exact match

“KANNA is the No.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
19Exact matchBirmingham Business Park, United KingdomHQ recorded Nov 5, 202651-20060 contacts →

Exact match

“4PS creates, implements and maintains one of the most powerful Project Management software solutions for the global construction, civil engineering and installation industry.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
20Exact matchJoinville, BrazilHQ recorded Nov 5, 202651-20060 contacts →

Exact match

“Artia, Software de Gestão de Projeto 100% web com implantação rápida para toda a sua equipe.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
21Exact matchSão Paulo, BrazilHQ recorded Nov 5, 202611-5053 contacts →

Exact match

“We're reshaping one of the less digitized industries in the world.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
22Exact matchPalo Alto, CA, United StatesHQ recorded Nov 5, 202611-5051 contacts →

Exact match

“Our mission is to empower builders with software that streamlines projects and drives financial performance.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
23Exact matchToronto, ON, CanadaHQ recorded Nov 5, 202651-20048 contacts →

Exact match

“Birdview is a comprehensive, full-cycle platform aiding organizations to plan, manage, and forecast resources, finances, and projects in one place.”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
24Exact matchMilpitas, CA, United StatesHQ recorded Nov 5, 2026201-50047 contacts →

Exact match

“Planview AdaptiveWork (formerly Clarizen) enables PMOs and professional services delivery teams of all sizes to gain real-time visibility across all their work, automate…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
25Exact matchCovina, CA, United StatesHQ recorded Nov 5, 202611-5046 contacts →

Exact match

“ProofHub is an all-in-one project management and team collaboration platform built for teams of all sizes who want to spend less time managing work, and more time doing it - full…”

Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase

Showing 25 of 990 open source project management software companies worldwide

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Open source project management software companies worldwide at a glance

As of Nov 5, 2026
48.9%Verified-email coverage
27.9Average contacts per company
1-10Median size (employees)
2.3%Largest-city concentration · London
Nov 5, 2026Page data refreshed

Companies by employee count

1-10
592
11-50
311
51-200
60
201-500
13
501-1,000
3
1,001-5,000
4
10001+
2

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 project management software companies are linked below.
What qualifies
Company records worldwide whose business descriptions match “open source project management 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 13,500 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 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.

Open source project management software companies by location

9 lists · largest first

Every Open source project management software companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “open source project management software companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many open source project management software companies are there worldwide?

RevenueBase identified 990 company matches for open source project management software companies worldwide as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Atlassian tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most open source project management software companies?

The United States leads with 173 companies, followed by the United Kingdom (51) and France (50). Every open source project management software companies list by country and city is linked on this page.

Which city has the most open source project management software companies?

London leads with 23 company records, followed by Sydney (13) and Berlin (12).

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 13,500 professional contacts with verified work emails tracked across these 990 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 5, 2026.

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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.