Jigsaw

service

proprietary hosted API by Jigsaw/Google(no weights, no self-host)

access

free with quota

scores

toxicity + related attributes

source

closed

license

proprietary

Closed, API-only hosted classifier; no weights or source. Long-standing and influential, but proprietary. The product is also ending - the site leads with a sunset notice and the API goes out of service after 2026 - but that is a fact about availability rather than about openness, so the closed score stands.

• https://perspectiveapi.com/ recorded 2026-08-13

  Jigsaw's hosted API, governed by its own API Terms with no source or self-hostable implementation offered anywhere on the site; access is by quota, and the page handles usage and increased-quota requests. It now opens 'Important Notice - Perspective API is sunsetting and service is officially ending after 2026', with 'The service will remain active until December 31, 2026' and no migration support.