All in One SEO vs Slim SEO (September 2026)
Updated September 7, 2026 · Data from WordPress.org, refreshed daily · How this works
Both rank in the WordPress.org SEO Plugins top 10: All in One SEO at #3 and Slim SEO at #8. All in One SEO leads on 4 of the 5 measures we track. Every number below comes straight from WordPress.org and is refreshed every day.
All in One SEO
All in One SEO – AI SEO Plugin to Boost SEO Rankings & Traffic (Schema, Local SEO, Sitemap & SEO Insights)
AIOSEO is the WordPress SEO plugin. Boost SEO rankings with AI SEO tools, schema, meta descriptions, XML sitemaps & rank tracking.
Slim SEO
Slim SEO – AI SEO Plugin, Lightweight, Fast & Automated
An AI SEO plugin for WordPress that's lightweight and fast. Automatically generates meta tags, sitemaps, schemas and more with no bloat.
Who leads on what
All in One SEO leads on 4 of the 5 measures we track.
All in One SEO ranks higher on WordPress.org: #3 against #8 in SEO Plugins.
All in One SEO has more users: 2 million+ active installs against 70,000+.
Both are rated 4.7 out of 5 (5,202 and 136 reviews).
All in One SEO has more reviews behind its score: 5,202 against 136.
All in One SEO was updated more recently, on August 28, 2026; Slim SEO on August 24, 2026.
Which one to pick
Each plugin is the better answer for the measure it actually leads on. Nothing here is a recommendation we invented.
All in One SEO
Pick All in One SEO if you go by where WordPress.org itself puts them, you want the plugin more sites already run, you want the score backed by more reviews or you want the one shipping releases most recently.
Slim SEO
Slim SEO does not lead on any measure we track, so pick it only for something these numbers cannot show, such as a feature you need.
All in One SEO vs Slim SEO side by side
| All in One SEO | Slim SEO | |
|---|---|---|
| SEO Plugins ranking | #3 | #8 |
| Rating | 4.7 | 4.7 |
| Reviews | 5,202 | 136 |
| Active installs | 2 million+ | 70,000+ |
| Total downloads | 210,108,374 | 2,133,444 |
| Downloads, last 30 days | – | – |
| Last updated | Aug 28, 2026 | Aug 24, 2026 |
| First published | Mar 30, 2007 | Dec 31, 2018 |
| Tested up to WordPress | 7.1 | 7.1 |
| Requires PHP | 7.2 | 7.4 |
| Pricing | Free on WordPress.org | Free on WordPress.org |
30-day download figures appear after both plugins have 30 days of tracking.
All in One SEO ratings
Slim SEO ratings
How we compare these two
Every figure here is pulled from the WordPress.org plugin API every day at 03:00 UTC, for both plugins in the same run, so the two are always read on the same day. We compare only what the directory reports: active installs, the rating and how many reviews stand behind it, the last release date and, once we have a month of history, downloads over the last 30 days. Ratings are only called a win above 50 reviews each, because a handful of five-star reviews is not evidence. Nothing is weighted into an overall score, no measure is worth more than another, and neither All in One SEO nor Slim SEO can pay to appear here: the pair exists only because both plugins reached the SEO Plugins top 10. Full methodology.
All in One SEO vs Slim SEO: common questions
Is All in One SEO better than Slim SEO?
All in One SEO leads on 4 of the 5 measures we track. Neither is better at everything, and the answer depends on which measure you weigh. All in One SEO ranks higher on WordPress.org: #3 against #8 in SEO Plugins.
Which has more users, All in One SEO or Slim SEO?
All in One SEO ranks higher on WordPress.org: #3 against #8 in SEO Plugins.
Which is rated higher, All in One SEO or Slim SEO?
All in One SEO has more users: 2 million+ active installs against 70,000+.
Are All in One SEO and Slim SEO free?
Both are free to install from WordPress.org. All in One SEO may also sell a paid version or add-ons. Slim SEO may also sell a paid version or add-ons.
Alternatives to All in One SEO and Slim SEO
Plugins that score close to both in the same WordPress.org rankings and tags.
More SEO Plugins comparisons
- ACF Content Analysis for Yoast SEO vs All in One SEO
- ACF Content Analysis for Yoast SEO vs Slim SEO
- All in One SEO vs Cloudflare
- All in One SEO vs XML Sitemap Generator for Google
- All in One SEO vs LiteSpeed Cache
- All in One SEO vs Rank Math SEO
- All in One SEO vs SEO SIMPLE PACK
- All in One SEO vs SiteSEO
- All in One SEO vs SpeedyCache
- All in One SEO vs SureRank SEO
- All in One SEO vs Yoast SEO
- All in One SEO vs SEOPress
Weekly · free
What moved this week
One email a week, built from the same daily snapshots these rankings come from: the plugins that climbed, what launched, and one ranking worth a look.