Head-to-head · September 2026
Akismet Anti-spam: Spam P… vs Knowledge Building
Akismet Anti-spam: Spam Pro… comes out ahead, winning 6 of 7 head-to-head checks against Knowledge Building.
Akismet Anti-spam: Spam Protection
The best anti-spam protection to block spam comments and spam in a contact form. The most trusted antispam…
Knowledge Building
Knowledge Building is a process of collaboratively building new understanding and knowledge through…
| Metric | Akismet Anti-spam: Spam P… | Knowledge Building |
|---|---|---|
| Active installs | 5M+ | 10+ |
| Downloads (30 days) | 1.8M | 46 |
| Download trend | -79.5% | +17.9% |
| Rating | 4.7/5 | 5/5 |
| Reviews | 1,187 | 1 |
| Health score | 94/100 | 30/100 |
| Last updated | 1 month ago | 11 years ago |
| Tested up to | WP 7.1.2 | WP 4.3.34 |
| Support resolved | 100% | — |
| Requires PHP | 7.2+ | Any |
| First released | Oct 2005 | Sep 2009 |
Daily downloads, last 90 days
Akismet Anti-spam: Spam…Knowledge Building
Choose Akismet Anti-spam: Spam P… if…
You care most about active installs, downloads (30 days) and reviews.
- One of the most-used plugins on the web — 5M+ active sites
- Loved by users — 4.7/5 from 1,187 reviews
- Tested with the latest WordPress (7.1)
Choose Knowledge Building if…
You care most about download trend.
- Small user base (10+ active installs)
- Very few reviews so far
- No update in 11 years
- Only tested up to WordPress 4.3 (latest is 7.1)
Both compete in: comments
FAQ
Akismet Anti-spam: Spam P… vs Knowledge Building: quick answers
Straight answers, pulled from live WordPress.org data.
Live data from WordPress.org · checked Sep 30, 2026
Which is better, Akismet Anti-spam: Spam Pro… or Knowledge Building?
Akismet Anti-spam: Spam Pro… comes out ahead, winning 6 of 7 head-to-head checks against Knowledge Building. Choose Akismet Anti-spam: Spam Pro… if you care most about active installs, downloads (30 days) and reviews. Choose Knowledge Building if you care most about download trend.
Is Akismet Anti-spam: Spam Pro… more popular than Knowledge Building?
Akismet Anti-spam: Spam Pro… is the more popular of the two with 5M+ active installs, compared with 10+ for Knowledge Building.
Can I use Akismet Anti-spam: Spam Pro… and Knowledge Building together?
Both plugins cover comments, so most sites only need one. Running two plugins that do the same job can cause conflicts and slow your site down — pick the one that fits best and remove the other.
Are Akismet Anti-spam: Spam Pro… and Knowledge Building free?
Yes. Both are free to download from the official WordPress.org plugin directory. Either may also offer paid upgrades from its developer.
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