The Open Source Contributor Index (OSCI), launched by EPAM in 2019, stands as a revolutionary ranking tool that evaluates companies based on their GitHub contributions. Nearly seven years later, in 2026, EPAM continues to lead the charge, demonstrating its commitment to open-source innovation through meticulous OSCI maintenance, the commercialization of OSPulse and consistent top-20 rankings in the global contributor ecosystem.
OSCI: A Tool That Stands the Test of Time
EPAM's open-source legacy lives on through OSCI, which remains accessible at opensourceindex.io and on GitHub at GitHub/epam/OSCI. OSCI captures and processes GitHub Archive data across nearly 320 companies spanning 12 industries, measuring key metrics like active contributors (defined as users with 10 or more commits) and the total community base (those with at least 1 commit). This approach ensures that the index reflects the scale and depth of contributions in the open source landscape, giving organizations actionable insights into their role in driving innovation.
EPAM's Evolution: Introducing OSPulse (2024)
In February 2024, EPAM brought a new dimension to OSCI with the launch of OSPulse™, an enterprise-level analytics dashboard for monitoring open source engagement within an organization. Built on EPAM's deeply rooted expertise and powered by 140,000+ public commits made by EPAM engineers, OSPulse introduces advanced features that enable organizations to harness the full value of their open-source efforts.
OSPulse offers:
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Custom Reports: Tailored analytics showing contributions by project, language and license type.
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HR Integration: Tools that allow HR teams to identify skill gaps and highlight top-performing contributors.
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Skill Gap Analysis: A clear view of areas for growth across teams and individuals, helping businesses align their workforce development goals with open-source trends.
This product commercialized OSCI's core principles, making it a must-have tool for companies looking to integrate open source contributions into broader business strategies.
EPAM's Rise in the OSCI Rankings: A Journey of Growth
EPAM's own history with OSCI offers an inspiring narrative of commitment and progress. When the index first launched in 2019, EPAM ranked outside the top 25 contributors. Yet, through dedication and an expansive open-source roadmap, EPAM steadily climbed the rankings:
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2019: Positioned outside the Top 25 Contributors.
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2020–2022: Achieved incredible growth, rising to 18th place by 2022.
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2023–2026: Maintained a strong presence in the top 20 thanks to major contributions like Vividus and development across 90+ open-source projects driven by EPAM's open source leadership.
Today, EPAM stands tall among the largest contributors, offering invaluable expertise in an environment traditionally dominated by technical giants.
OPEN SOURCE
Vividus
Codeless test automation tool
Top 10 Open Source Contributors (2025)
This dashboard snapshot shows the top 10 commercial organizations by active open source contributors, along with month‑over‑month growth in contributor count and total community size, plus side panels summarizing most used languages (Python leading) and license usage across MIT, Apache‑2.0, GPL‑3.0 and others.
While EPAM's contributor base doesn't rival the giants like Google or Microsoft, its focused approach and strategic initiatives consistently position the company as a leader among consultancy firms and one of the most active contributors to open-source innovation.
EPAM's Broader Contributions to Open Source Innovation
EPAM's commitment to open source goes far beyond rankings and dashboards. The company actively contributes to 90+ open-source projects, boasts 3K+ contributors and 550K+ commits in the public domain, powering tools like Vividus, Indigo, Ketcher and more.
Additionally, EPAM offers free demos of OSPulse™, giving interested customers a hands-on experience with one of the industry's most detailed tools for tracking contributions.
Create Awareness or Build Your Own Index
EPAM didn't just launch OSCI; they refined it into OSPulse, raised their own rankings and helped establish open-source contribution measurement as mainstream.
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Submit Domain: Get ranked instantly via email mapping.
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Try OSPulse Free: Track commits, skill gaps, 90+ EPAM projects benchmarked.
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Join EPAM Open Source: Contribute to Vividus, Ketcher and more (130+ repos).
Future of open source starts now. No hunting, instant action.
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FAQs
What is OSCI?
Without going into too much detail, OSCI is a ranking of contributions to GitHub by commercial organizations. It is an open-source project that measures and tracks open-source activity on GitHub.
What commercial organizations does OSCI track?
OSCI focuses exclusively on commercial organizations, excluding universities, non-profits and government entities. Companies are identified through email domain mapping in commit author records.
How does OSCI define contribution activity?
OSCI uses two measures: Active Contributors (10+ commits) and Total Community (at least one commit). This dual approach captures both dedicated open source leaders and broader open source activity.
Can smaller companies appear in the OSCI rankings?
Absolutely. Smaller companies with focused open source software contributions regularly appear. Total commits and contributor count determine rank, not company size.
What methodology powers OSCI's rankings?
OSCI processes GH Archive data, mapping commit author emails to company fields via verified domains. It calculates the total number of contributors and commits across all GitHub languages and repositories — transparent code and documentation available on GitHub.
How has open source ecosystem measurement evolved?
OSCI tracks have become increasingly important for project management and business strategy. Similar studies like Two Sigma's index complement OSCI, while tools like Azure Cloud integration and EPAM's OSPulse make tracking accessible to all.
