6 companies, 6 verified offers, re-checked weekly.
Not sure which you qualify for? Match your repo.
Error tracking, 6 companies
IDCompanyWhat you getStatusVerified
FOS-0008AppSignalerror trackingmonitoringFree sponsored AppSignal account for open-source software and "for good" projects, with core monitoring…ACTIVEverified 2026-09-07›
What you get
Free sponsored AppSignal account for open-source software and "for good" projects, with core monitoring features: error tracking, performance monitoring, host monitoring, anomaly detection, uptime monitoring and log management. No named tier or hard limits published on the page.
Applies to
the project , not individual maintainers
Requirements
no stated requirements
How to apply
Email support@appsignal.com with the subject "Hi AppSignal, can I get a sponsored account?" to request a sponsored account.
Provenance
Confirmed against appsignal.com/open-source on 2026-09-07, matched anchor “is Free for Open-Source Software”.
FOS-0021BugSnagerror trackingFree standard plan for open source projects and non-profits: unlimited BugSnag usage with up to 15,000…ACTIVEverified 2026-09-07›
What you get
Free standard plan for open source projects and non-profits: unlimited BugSnag usage with up to 15,000 events per month, up to 15 collaborators, and access to the Releases Dashboard and Session Tracking.
Applies to
the project , not individual maintainers
Requirements
OSI-approved licensenon-commercial / non-profit
run a repo match above to see which you meet →
How to apply
Create a free BugSnag account, then submit the request form on the offer page with your license, README/About page, account email, and proof of the BugSnag logo backlink.
Provenance
Confirmed against bugsnag.com/open-source on 2026-09-07, matched anchor “Free for Open Source”.
FOS-0029CatchJSerror trackingComplimentary (free) CatchJS subscription for open source software projects; site states they give free…ACTIVEverified 2026-09-07›
What you get
Complimentary (free) CatchJS subscription for open source software projects; site states they give free subscriptions to open source projects out of appreciation for the OSS community. Exact plan tier not specified on the page.
Applies to
the project , not individual maintainers
Requirements
no stated requirements
How to apply
Apply via the form at https://catchjs.com/Contact/OpenSource (linked "Click here to apply" on the homepage).
Provenance
Confirmed against catchjs.com on 2026-09-07, matched anchor “free subscription to such projects”.
FOS-0070elmah.ioerror trackingmonitoringFree Small Business subscription to elmah.io (error logging and uptime monitoring for .NET) to monitor…ACTIVEverified 2026-09-07›
What you get
Free Small Business subscription to elmah.io (error logging and uptime monitoring for .NET) to monitor your open source project. Subscription may only be used for the open source project itself.
Applies to
the project , not individual maintainers
Requirements
public repositorynon-commercial / non-profit
run a repo match above to see which you meet →
How to apply
Get in contact with elmah.io (via site contact) to redeem the free subscription, per the open source sponsorship page.
Provenance
Confirmed against elmah.io/sponsorship/opensource on 2026-09-07, matched anchor “Monitor your open source website for free”.
FOS-0148Scout APMmonitoringerror trackingFree access to Scout's Large plan with full features: application traces, error monitoring, log…ACTIVEverified 2026-09-07›
What you get
Free access to Scout's Large plan with full features: application traces, error monitoring, log management, query analysis, and alerting. Supports Ruby, Python, PHP, and Elixir.
Applies to
the project , not individual maintainers
Requirements
OSI-approved licensepublic repository
run a repo match above to see which you meet →
How to apply
Open a support ticket via the "Apply for Free Access" link on the offer page with a link to your repo and a brief description.
Provenance
Confirmed against scoutapm.com/open-source on 2026-09-07, matched anchor “open source license”.
FOS-0151Sentryerror trackingmonitoringFree sponsored plan with Business features and no term limit: 5M errors, 5,000GB logs, 1B spans, 100K…ACTIVEverified 2026-09-07›
What you get
Free sponsored plan with Business features and no term limit: 5M errors, 5,000GB logs, 1B spans, 100K replays, 500 cron monitors, 25 uptime monitors, 3K continuous profile hours, 150 UI profile hours, 10GB attachments, 1,000 size analysis uploads, and Seer for 5 active contributors; overage budget can be enabled.
Applies to
the project , not individual maintainers
Requirements
OSI-approved license
run a repo match above to see which you meet →
How to apply
Application form on the offer page: provide name/email/website, select "Open-Source" company type, Sentry org details, project description and GitHub repository link.
Provenance
Confirmed against sentry.io/for/open-source on 2026-09-07, matched anchor “Open-Source Sponsorship”.