Inbox Zero is listed under Email, Scheduling & Tasks, in the Productivity & Workflow category on Flocci AI Tools. Open-source codebase (9k GitHub stars), self-hostable for free. It is freemium — a usable free tier with paid plans above it, and it lives at getinboxzero.com.
Inbox Zero is freemium: there is a free tier you can work in and paid plans above it. It is one of 391 freemium tools in the catalog, all labelled the same way so you are never surprised by a paywall.
Inbox Zero does 3 things the catalog singles out: Open-source codebase (9k github stars), self-hostable for free; plain-english custom rules engine for inbox automation; cold-email blocking and bulk unsubscribe built in.
Zero is the closest free alternative: it sits in the same Email, Scheduling & Tasks sub-category and is free. Reclaim.ai, Shortwave and Taskade also start free. The full list is on the alternatives page.
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