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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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The change the title of the WordPress plugin
We changed the old title of the plugin for WordPress “Anti-Spam by CleanTalk” to the new “Spam protection by CleanTalk”. Don’t worry, we want to test how people perceive the long and short titles.
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Non-visual methods to protect the site from spam. Part 3. Repeats
Continuation of the article Non-visual methods to protect the site from spam Part 3: Repeats of substrings As mentioned above, non-visual methods for site protection against spam using text analysis. One of the most common spam signals – is the presence of repeated strings. As always, these examples are taken from actual company data CleanTalk.…
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Non-visual methods to protect the site from spam. Part 2. The true face of symbols
Continuation of the article Non-visual methods to protect the site from spam Part 2: The true face of symbols Non-visual methods to protect website from spam use, in particular, the analysis of the transmitted text. Spammers use many techniques to complicate the analysis. Here will be shown examples of one of them, namely, substitution of…
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Non-visual methods to protect the site from spam. Part 1. Statistics
Part 1. What statistic says Non-visual methods to protect the site from spam suggest automatic analysis of data coming from the visitor. As more data is analyzed, the more fully and more accurately visitor can be defined and made a decision is he a spammer or not. Systems that analyze such data usually accumulate visitor…