What happened to Cardinal?

discontinued The URL on file (https://cardinalapp.io/) did not respond across three consecutive checks; the streak completed on 2026-09-19.

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

The vendor's own description, unedited:
Cardinal is an AI-based feature backlog tool designed to improve product management by incorporating customer feedback into the feature development process. With the ability to pull in diverse data from customer feedback platforms, CRM systems, and task management tickets, it helps to determine cust...

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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