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WhoFundsOSS

Freshness 5 Oct 2026

How a number gets onto this site.

Known public total, per company, is the sum of amounts that were already public. Nothing is annualized. Nothing private is inferred. The same pledge dollar is not counted twice.

The four sources

  • Open Collective — historical totalAmountDonated, often multi-year. Not a run-rate.
  • Open Source Pledge — annual payment from the latest public report, devs times dollars per dev.
  • GitHub Sponsors — a monthly amount only when the tier is public. That is rare. It is not multiplied by twelve.
  • Own programs — a figure from a public page, or a name with no figure.

What was left out

Before this file: 119 spam companies ($643.7k) and 1 self-fund (Supabase, $1.1M). Spam and the Supabase self-fund are already out of this file. Counts are the 2026-10-05 method note, not recomputed here.

Supabase appears as a backer of its own collective. That was read as money moving through the project, not as classic outbound sponsoring, and kept out of the ranking until a manual review says otherwise.

Transparency, in one sentence

Score = 0.6 × (public dollars ÷ the leader) + 0.4 × (sponsorships with a public amount ÷ sponsorships). The leader this collection is $762.4k. A high score on a small total is labeled low volume. The score is never shown alone.

Snapshots

This build holds one snapshot, 5 Oct 2026, hash 9fca312af00a. 838 companies, 3,112 sponsorship lines, $9.3M in the top 200. baseline — next full collection is the 1st of the month. Deltas compare two hashes. They do not forecast the next one.

Internal API

Read-only. Preview key, header X-API-Key: wfo_preview_floor. Health is open. The rest refuse a missing key.

  • GET /api/health
  • GET /api/v1/leaderboard?sort=public_usd|projects|gh&limit=50&offset=0&include_whales=false
  • GET /api/v1/companies/:slug
  • GET /api/v1/companies/:slug/sponsorships
  • GET /api/v1/deltas?from=&to=
  • GET /api/v1/graph/co-sponsorships?min_shared=2
  • GET /api/v1/watchlist
  • GET /api/v1/watchlist/alerts?since=
  • GET /api/v1/export/companies
  • GET /api/v1/export/sponsorships
  • GET /api/v1/export/snapshots