What Open Source Pledge does

Open Source Pledge is a non-profit cultural initiative that encourages companies to commit at least $2,000 per developer per year in direct financial support to open source software (OSS) maintainers. Founded in October 2024, the Pledge evolved from Sentry's (Functional Software, Inc.) 2021 OSS funding program and serves as a coordination and advocacy mechanism rather than a financial intermediary. The Pledge does not charge membership fees and does not handle or process funds—member companies pay OSS maintainers independently through affiliated platforms.

The initiative is operationally backed by Sentry and led by founder Chad Whitacre, with support from Vlad-Stefan Harbuz and Sentry CTO David Cramer. A small team (estimated 1-10 employees) coordinates outreach, member onboarding, and public positioning. The Pledge has secured endorsements from the Open Source Initiative (OSI), Accel, and Open Source Collective, and partners with thanks.dev, GitHub Sponsors, Open Collective, and ecosyste.ms Funds to facilitate payments from members to maintainers.

Since launch, members have routed approximately $7.16 million to OSS maintainers, with $3 million+ committed in the past year alone—a meaningful acceleration given the initiative's short history. More than 40 companies have joined as members, including Sentry, Posit, AG Grid, Sanity, Zerodha, and Mux, ranging from small organizations to those with over 100 developers. The Pledge has received public visibility through repeated features on the Nasdaq Tower in Times Square (October 2024, May 2025, October 2025) and presentations at FOSDEM and State of Open UK. In February 2026, the Pledge welcomed the complementary Open Source Endowment, expanding the institutional framework for OSS sustainability.

Name

Open Source Pledge

Legal name

Functional Software, Inc.

Website

https://opensourcepledge.com

Company type

Private

Founded year

2024

Operating status

Operating

Headcount range

1–10 employees

Short description

Open Source Pledge is a non-profit initiative that encourages companies to commit at least $2,000 per developer per year in direct financial support to open source software maintainers; over 40 member companies participate globally.

Ownership category

akta.pro rank

Product category

Open Source Sustainability Services

NAICS

Grantmaking Foundations (813211), Grantmaking and Giving Services (81321)

SIC

Finance Services (6199)

akta.pro primary industry

Capacity Building & Nonprofit Infrastructure Funders (BPAGAKAO)

akta.pro secondary industries

Grantmaking & Philanthropic Funds (Institutional Donors) (BPADAOAB), Donor-Advised Fund (DAF) Sponsors (BPAGAKAF)

Keywords

• Open source sustainability
• OSS maintainer funding
• Corporate open source
• Developer sponsorship programs
• Open source advocacy

GTM type

B2B

Offering type

Services

Cost components

Marketing or Sales, Personnel, Operations, Others

Revenue model

1. Membership fees (OSS funding contributions): Member companies pay at least $2,000 per year per full-time equivalent developer on their payroll directly to OSS maintainers. The Open Source Pledge does not handle funds itself — it facilitates direct payments. Member companies route funds via platforms like GitHub Sponsors, Open Collective, and thanks.dev. The Pledge earns no revenue from this; it is a non-profit cultural initiative backed by Sentry's operational support.

Pricing tiers

Go-to-market motion3 records

Distribution channels1 record

Marketing channels5 records

Core offering

Open Source Pledge is a membership initiative that recruits technology companies to publicly commit to paying at least $2,000 per year per full-time developer on their payroll directly to open source software maintainers and foundations. The Pledge does not handle funds itself; member companies route payments to maintainers via third-party platforms such as GitHub Sponsors, Open Collective, thanks.dev, and ecosyste.ms Funds, while the Pledge provides commitment tracking, member badges, a job board, recruiting resources, and brand assets.

Product overview

Open Source Pledge is a membership organization (not a software product) that facilitates financial contributions from companies to open source maintainers. Member companies commit to paying at least $2,000 per year per employed developer directly to open source maintainers and foundations. The organization provides promotional tools including member badges, a job board, recruiting resources, and brand assets to help member companies demonstrate their commitment to open source sustainability. The core offering is the membership program itself, which serves as both a commitment mechanism and a signal of corporate responsibility to the open source ecosystem.

Differentiator

Problem solved

Functional benefit

Products and services

• Open Source Pledge Membership Program A membership program where companies commit to contributing at least $2,000 per year per employed developer directly to Open Source maintainers and foundations, facilitating corporate reciprocity for the open source ecosystem. Targets CTOs, CFOs, and founders of technology companies that depend on OSS in their products.
• Open Source Pledge Job Board A dedicated job board where member companies can post job listings, targeting developers who value companies that financially support the open source ecosystem.
• Member Badges and Social Icons Digital badges and icons that member companies can display on their websites, careers pages, and job boards to demonstrate their commitment to supporting open source maintainers.
• Member Recruiting Resources Tools and materials including pitch decks, email templates, and social media kits to help recruit new companies into the Pledge program.
• Pledge Logos (Co-branding Assets) Branded logo assets available for use by member companies in blog posts, social collateral, and co-branding materials.

Quantifiable outcome

• $7,156,281 paid to OSS maintainers since launch; $3M+ in the past year alone
• +3 more outcomes

Named customers8 records

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Nine partnerships are on record, tiered core and minor.

• Open Source Initiative (OSI)coreStrategic or Co-development PartnerThe OSI officially supports and endorses the Open Source Pledge. Their endorsement is featured prominently on the Pledge homepage, lending credibility as the steward of the Open Source definition.
• AccelcoreStrategic or Co-development PartnerVenture capital firm Accel has publicly endorsed the Open Source Pledge and published commentary on its Noteworthy blog explaining why it supports the initiative, signaling that paying OSS maintainers is a smart investment.
• Open Source CollectivecoreStrategic or Co-development PartnerOpen Source Collective endorses the Pledge and is a key payment infrastructure partner. Their platform is used by Pledge member companies to route funds to OSS maintainers. Open Source Collective moves approximately $25 million annually on behalf of 2,500 member OSS projects.
• GitHub SponsorscoreTechnology or IntegrationOne of the primary platforms through which Pledge member companies route payments to OSS maintainers. Recommended alongside Open Collective and thanks.dev as an easy-button for companies to pay maintainers.
• thanks.devcoreTechnology or IntegrationRecommended as an 'easy button' platform for companies to meter their OSS consumption and distribute payments to maintainers. David Cramer (Founder & CTO of Sentry, and Pledge initiator) is also a contributor to thanks.dev. The platform helps companies audit their dependency trees and route funds.
• EthicalAdsminorGTM or Marketing PartnerEthicalAds provides ethical, privacy-respecting advertising for the Open Source Pledge website, supporting the initiative's operations.
• StaticHostminorOthersProvides web hosting for the Open Source Pledge website (statichost.eu).
• PHP FoundationcoreStrategic or Co-development PartnerA key example of the kind of OSS foundation the Pledge funds. The PHP Foundation employs ten full- and part-time developers to maintain PHP. Featured in a Pledge blog post exploring how foundations steward critical OSS ecosystems. Founding members include Automattic, Laravel, Zend, and JetBrains.
• Open Source Endowment (OSE)minorStrategic or Co-development PartnerThe Open Source Endowment (endowment.dev) launched in February 2026 as a complementary initiative to the Pledge. While Pledge companies directly pay maintainers, Endowment members (primarily individuals) invest broadly in the long-term OSS ecosystem. OSE's founding board includes Chad Whitacre.

Scale indicators7 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Open Collective: Open Collective (and its Open Source Collective arm) is a fiscal sponsorship and funding platform that moves ~$25M annually on behalf of 2,500 OSS projects. It is both an OSP endorser and the underlying payment infrastructure through which Pledge members route funds to maintainers.
• Open Source Initiative (OSI): OSI is the steward of the Open Source Definition and a public endorser of OSP. While its primary mission is licensing/advocacy rather than funding, it operates in the same OSS sustainability space and lends OSP category credibility.
• Tidelift: Tidelift operates a subscription-based service that helps companies pay the open source maintainers they depend on, taking a cut of the payments routed through its platform. Directly comparable to OSP in targeting the same corporate-underfunding-of-maintainers problem, but with a commercial revenue model.
• GitHub Sponsors: GitHub Sponsors is the largest direct-maintainer sponsorship platform and one of the primary channels through which OSP member companies route payments to OSS maintainers. Closest direct comparison as a corporate-giving-to-maintainers facilitation layer.
• thanks.dev: thanks.dev meters a company's OSS consumption via dependency trees and distributes payments to maintainers — explicitly built as an "easy button" recommended by OSP. Closely aligned mission and customer base; OSP member Sentry uses it to distribute $75K of funding.
• Software Freedom Conservancy: Software Freedom Conservancy provides fiscal sponsorship and advocacy for OSS projects and is a comparable nonprofit infrastructure organization in the open-source sustainability space. Functions as both a peer and a potential member/beneficiary of OSP-funded contributions.

Emerging players

• PHP Foundation: The PHP Foundation employs ~10 developers to maintain PHP and is a key example of the kind of OSS foundation that OSP member contributions fund. Features in OSP blog content as a model for foundation-stewarded OSS sustainability.
• Open Source Endowment: Open Source Endowment (OSE) launched February 2026 as a complementary initiative to OSP — focusing on individual investors rather than corporate pledges, with Chad Whitacre on its founding board. Same mission surface, different contributor base.

Broad incumbents

• Linux Foundation: The Linux Foundation is the largest OSS funding and stewardship organization globally, supporting thousands of projects via corporate membership dues. A broad incumbent in the same "corporate funding of OSS" category as OSP, though much larger in scope.
• Sentry: Sentry is both the parent company and the originating sponsor of OSP, and the largest individual member (~$100M ARR, ~135 engineers, $270K/yr minimum commitment). Compares as a broad incumbent because it already runs an internal OSS funding program since 2021 that OSP evolved out of.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• GitHubgithub.com/opensourcepledge
• Xx.com/ThePledge
• LinkedInlinkedin.com/company/opensourcepledge

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Open Source Pledge