# Blackfire free for open source

What Blackfire gives open source projects, who qualifies, and how to apply. 1 verified offer, last checked 2026-09-07.

- Website: https://www.blackfire.io
- Categories: monitoring

## Blackfire Profiler free subscriptions for open source maintainers

**What you get.** A free Blackfire Profiler subscription for each project lead and core committer, valid for one year and renewable while the project still qualifies. For developing non-commercial open source projects only; subscriptions cannot be shared.

**Who qualifies.** Applies to the maintainer; OSI-approved license required; active development required; non-commercial use only. The project must meet the Open Source definition and show regular commits in the past 3 months. Maintainers must not sell paid versions or commercial services around the project, must not be funded by commercial companies or by NGO, educational, research or governmental organizations, and must not pay their core developers.

**How to apply.** Use the "Apply for sponsorship" button on the offer page, which leads to the application form at blackfire.io/open-source-apply.

Program page: https://www.blackfire.io/open-source/free-subscriptions/

Verified 2026-09-07 - manual: blackfire.io/open-source/free-subscriptions/ live 2026-09-07; requirements and support terms read from the page. Found via the README sponsor-mining pilot (7 sample repos).

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