Self-Hosted Anti-Spam in 2026: Why Proof-of-Work CAPTCHAs Are Not Enough and What On-Prem Protection Needs

TL;DR. Self-hosted protection is having its moment: Cap has 8,013 GitHub stars after 21 months, ALTCHA’s npm packages are downloaded 1.49 million times a month, Anubis collected 23,427 stars in a year and a half. Every one of these tools runs on your server and keeps your users’ data at home. Every one of them…

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