What happened to Proofcheck?

discontinued The URL on file (https://www.proofcheck.io/) did not respond across three consecutive checks; the streak completed on 2026-09-28.

The address on file matched Proofcheck's own domain with high confidence, so this observation is reported about Proofcheck directly. See the methodology for how the match is made.

The vendor's own description, unedited:
Proofcheck is a web-based AI tool that offers advanced proofreading capabilities aimed at helping content creators avoid errors and ensure polished, professional content. This platform stands out with its unique capacity to proof-check design-centric content such as books, magazines, reports, and pr...

Live alternatives

No active same-category alternatives in the registry yet. The tools index carries everything else that is live.

How this was decided

Not an editorial call. The URL on file failed three consecutive checks, with a confirmation re-probe before the streak counted (a bot-wall response never counts as one), and the 3-miss rule marks the listing discontinued automatically. If the URL responds again, the registry restores it on its own: warn first, then active. Both directions are recorded as events.

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