Akismet

Hosted spam filter for comments and contact-form submissions

Overview

Akismet checks comments and contact-form submissions against a hosted spam database and filters out those that look like spam, keeping a status history for each comment.[11] It is developed by Automattic and shows 5+ million active installations. The plugin requires an Akismet API key; its WordPress.org page says keys are free for personal blogs and that paid subscriptions are available for businesses and commercial sites.[11] Akismet’s pricing page lists a “name your price” Personal plan, a Pro plan from US$9.95 per month billed yearly (500 spam checks a month, one site) and a Business plan at US$49.95 per month billed yearly.[12]

Akismet strengths and limitations

Strengths

  • Filtering happens server-side with no CAPTCHA for visitors
  • Works with comments and several form plugins

Limitations

  • Commercial sites must pay, with monthly check limits on lower tiers
  • Submissions are sent to an external service for analysis

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