Slim SEO review (2026): is the free plan enough?
WordPress SEO plugin that sets meta tags and schema with no setup
Our verdict
First of our top three SEO plugins and apps
For: Most WordPress site owners
Slim SEO writes meta titles, descriptions, robots and social tags, connected JSON-LD schema, XML, image and News sitemaps and breadcrumbs from each post with no setup, and the free plugin also handles redirect rules and logs 404s. Personal is $59 a year for one site and renews at the same price, adding a schema builder with 30+ types, link suggestions, Search Console reports and a writing assistant. Know the limits: it runs only on self-hosted WordPress, AI meta writing uses your own OpenAI, Gemini, Claude or OpenRouter key billed by that provider, and writing tips while you draft are Pro only.
See all three and how we rankSlim SEO report card
Very good · out of 4.0 · graded Oct 23, 2026
Best for WordPress SEO with almost no settings
Slim SEO writes meta tags, schema and sitemaps on its own and handles redirects and 404s, all in the free plugin, with Pro at $59 a year for one site. The AI writing runs on your own AI key, so that's billed separately, and the schema builder, link tools and Search Console reports are all Pro.
Who Slim SEO is for
- Fits if you want SEO tags handled with very few settings to touch
- Works for freelancers adding schema and link reports across up to 10 client sites
Who Slim SEO is not for
- Watch out: AI meta writing runs on your own OpenAI, Gemini, Claude or OpenRouter key, billed by that provider
- Tight if you stay free, as the schema builder, link tools, Search Console reports and writing tips are Pro
- Skip it if your site isn't on self-hosted WordPress, as there's no standalone app
- Watch out: Pro includes a year of updates, refunds close after 14 days, and hosts and SaaS firms must ask for a quote
Why Slim SEO gets a 3.4
Five grades, each with its reason. The GPA is their average: an A is 4 points, an F is none.
- AValue for moneyPersonal is $59 a year for one site, about $4.92 a month, and renews at the same price. That's under 60% of this category's cheaper quarter. Ten sites are $119 a year and unlimited sites $179.
- AFree plan and trialThe free plugin has no caps: automatic meta and social tags, schema, XML, image and News sitemaps, breadcrumbs, redirects, 404 logs and AI meta writing with your own key. The schema builder and link tools are Pro.
- BFeaturesMeta tags, connected schema, sitemaps, breadcrumbs, redirects, 404 logs and AI meta writing, then on Pro a schema builder with 30+ types, link suggestions, Search Console reports and a writing assistant. It covers the whole job.
- BEase of useNo rating on record, but it works as soon as it's on: meta tags, schema and sitemaps are written from your posts with no setup. Only the AI writing needs a key pasted in.
- BPlatforms and integrationsWeb only, inside WordPress. It connects to Search Console, Google Analytics and Tag Manager, and to OpenAI, Gemini, Claude and OpenRouter for AI writing.
What these grades rest on. Graded from this listing, whose facts were read from Slim SEO's own pages on 23 October 2026. Not based on using the product, and shorter than our full reviews. How we review and grade.
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<a href="https://toolgpa.com/tools/slim-seo#review"><img src="https://toolgpa.com/badge/slim-seo.svg" alt="Slim SEO: 3.4 GPA on ToolGPA" width="196" height="56"></a>Where Slim SEO stands among SEO plugins and apps
Slim SEO's GPA of 3.4 is higher than 78 of the 78 other SEO plugins and apps we grade.
It stands best on free plan and trial (A, above 63 of 78) and worst on platforms and integrations (B, above 31).
Its paid plans start at $4.92 a month when paid by the year, against a middle price of $9.99 for the category: 7 of the 58 others that charge start lower.
On features, ease of use and platforms it scores 3.0 out of 4, and no tool on the category's chart scores higher without costing more.
Each grade against the category
Every bar is all 79 SEO plugins and apps we grade, cut by the letter each got. Slim SEO’s own letter is outlined.
- AValue for moneyAbove 53 of 78, level with 25
- AFree plan and trialAbove 63 of 78, level with 15
- BFeaturesAbove 53 of 78, level with 25
- BEase of useAbove 60 of 78, level with 18
- BPlatforms and integrationsAbove 31 of 78, level with 47
Price against what you get
Each dot is one of 70 SEO plugins and apps. Further left costs less, and higher up scores better on features, ease of use and platforms. Point at a dot to see which tool it is.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Keep Slim SEO, or make your own?
Keep it
The plain part of Slim SEO you could make: schema markup and internal linking. What surrounds it you could not. The 4 things listed below take a company, not a weekend.
It is one of the better ones too: its GPA of 3.4 is higher than 78 of the 78 other SEO plugins and apps we grade. It costs $59 a year.
What you could make
- Schema markup and internal linking: an app builder makes these well.
What you could not
- A score built from what the top results for each keyword cover.
- It plugs into other products, Google Search Console, Google Analytics and Google Tag Manager among them.
- AI features, unless you pay a model provider for each request yourself.
- The depth: we grade its features B, which means it covers the whole job.
What this rests on. Slim SEO’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
What is Slim SEO?
Slim SEO is a WordPress SEO plugin from the team behind Meta Box that works with almost no configuration. The free plugin generates meta tags, social tags, schema, XML sitemaps and breadcrumbs, handles redirects and 404 monitoring, and can write titles and descriptions with your own AI key. Slim SEO Pro adds a visual schema builder, internal link suggestions and link health reports, Search Console data and a writing assistant.
Worth knowing
- It needs a self-hosted WordPress site; there is no standalone app.
- AI meta writing uses your own OpenAI, Gemini, Claude or OpenRouter key, so the AI provider bills you separately.
- The schema builder, link tools, Search Console reports and writing assistant all need Slim SEO Pro.
- Pro licences include a year of updates and support; refunds can be requested within 14 days.
Key features
- Automatic meta and social tags
- Writes meta titles, descriptions, robots tags, Open Graph, Twitter Card and LinkedIn tags from each post with no setup, all editable.
- AI titles and descriptions
- The free plugin writes meta titles and descriptions one by one or in bulk using OpenAI, Gemini, Claude or OpenRouter, with your own API key.
- Schema, sitemaps and breadcrumbs
- Adds connected JSON-LD schema automatically and builds XML, image and Google News sitemaps. Pro adds a visual builder with 30+ schema types and custom JSON-LD.
- Redirects and 404 monitoring
- Set redirect rules, force www or non-www, log 404s and redirect automatically when a post's slug changes, on the free plugin.
- Link manager
- Pro scans every link for status, suggests internal links from post content, fixes broken or redirected links in bulk and reports orphan pages.
- Search Console and writing assistant
- Pro shows Search Console performance, keyword and page reports in WordPress, and gives tips on keywords, images, links and readability while writing.
Slim SEO pricing
As of Oct 23, 2026, Slim SEO has a free plan, and paid plans start at $59 per year for 1 site.
- Starts at
- $59 per year for 1 site
- Free plan
- Free plugin on WordPress.org: automatic meta and social tags, schema, XML, image and news sitemaps, breadcrumbs, redirects, 404 monitoring and AI meta writing with your own API key.
- Free trial
- None listed
| Plan | Price | What you get |
|---|---|---|
| Slim SEO | $0 | The free WordPress.org plugin with automatic meta tags, schema, sitemaps, redirects and AI-written metadata. |
| Personal | $59per year for 1 site, renews at the same price | Slim SEO Pro on 1 site: visual schema builder, link suggestions and health monitoring, Search Console reports and the writing assistant. |
| Freelancer | $119per year for 10 sites, renews at the same price | The same Pro features on up to 10 sites, with a year of updates and support. |
| Agency | $179per year for unlimited sites, renews at the same price | The same Pro features on unlimited sites. Hosts, SaaS companies and maintenance services must ask for a quote. |
Read from wpslimseo.com on Oct 23, 2026. Prices change, so confirm with Slim SEO before you buy.
Ways to pay less
- EducationEducation licence discount on request
The Slim SEO Pro page invites schools and other educational buyers to contact the team for a discounted licence. The amount is not stated.
Stated on wpslimseo.com - NonprofitNonprofit licence discount on request
The Slim SEO Pro page invites nonprofits to contact the team for a discounted licence. The amount is not stated.
Stated on wpslimseo.com
Works with
Slim SEO alternatives
- Slim SEO vs The SEO Framework
Free plan · from $7/mo
- Slim SEO vs Yoast SEO
Free plan · from $118.80/yr
- Slim SEO vs SEOPress
Free plan · from $49/yr
- Slim SEO vs All in One SEO (AIOSEO)
Free plan · from $99/yr
- Slim SEO vs Rank Math
Free plan · from €8.99/mo
Common questions
Does Slim SEO have an Android app?
No Android app was listed when its pages were read on Oct 23, 2026. Slim SEO is listed for Web.
Does Slim SEO have an iPhone app?
No iPhone app was listed when its pages were read on Oct 23, 2026. Slim SEO is listed for Web.
Is Slim SEO open source?
Slim SEO is not described as open source on its own site, as read on Oct 23, 2026.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Oct 23, 2026.