The best WordPress SEO plugins of 2026: Yoast, Rank Math, AIOSEO and SEOPress compared

For most small business sites, the free version of Yoast SEO or Rank Math is the best WordPress SEO plugin. Pay only when you want AI help with titles, descriptions or internal links. Then choose on price per site and on how much you want to approve yourself.

All four big plugins do the basics well. You get a field per page for the title and meta description, an XML sitemap, structured data and redirects. The differences come down to three things. What does the AI do? What do you pay for more than one site? And what happens without you pressing a button?

The four big plugins side by side

All prices come from the plugins’ own pricing pages and exclude sales tax (October 2026 prices). Install counts come from the plugin pages on WordPress.org.

Plugin	Free version	Paid from	Number of sites	AI in the paid version
Yoast SEO	Yes, 10+ million installs	Premium: $118.80 a year	1 site per subscription	Suggests titles and descriptions, also in bulk
Rank Math	Yes, 4+ million installs	PRO: $7.99 a month, billed yearly	Unlimited own sites, no client sites	Automatic internal links; writing help as a separate subscription
SEOPress	Yes, 300,000+ installs	PRO: $49 a year	1 site (5 sites $59, unlimited $149)	Titles, descriptions and alt text with your own AI key, also automatically on publish
AIOSEO	Yes (Lite), 2+ million installs	Basic: $49.50 the first year	1 site	AI credits for titles, descriptions and FAQs; link assistant from Pro

One rule up front: never install two at once. Two SEO plugins both write a title, a sitemap and schema into your page, and Google does not know which counts. How the plugin fits with the rest of your settings is in WordPress SEO: the five settings that matter.

Yoast SEO: everything waits for your approval

Yoast is the best-known plugin, and the free version does more than many people think. It creates an llms.txt file: an overview of your site for AI systems. It also merges your site’s structured data into one connected graph (Yoast AI features). For an employment law firm in Columbus with forty pages, that is enough.

Yoast Premium costs $118.80 a year per site (October 2026 price, Yoast SEO pricing). It adds the AI features. AI Generate suggests titles and meta descriptions. AI Optimize suggests improvements to your text. And the AI Bulk Editor drafts suggestions for all your pages at once.

Yoast sums it up itself: the AI makes a suggestion, and you approve every change. Premium also includes internal link suggestions and a redirect manager, plus the Local, Video and News SEO add-ons.

Yoast AI+ costs $358.80 a year. It bundles Premium, WooCommerce SEO and AI Brand Insights. Brand Insights measures every week how ChatGPT, Gemini, Claude and Perplexity talk about your brand, based on up to five brand questions you set (Yoast AI+).

New since version 28.7 (October 13, 2026) is Yoast SEO Abilities. It lets an AI tool you use change your SEO title, meta description and social previews. Your focus keyphrase stays read-only for that tool (release 28.7).

Our advice: choose Yoast Premium if you want AI help but do not want anything live that you have not read. With ten sites you do pay ten times.

Looking for something other than Yoast? Read Yoast alternative.

Rank Math: the most generous free version

Rank Math gives a lot for free. You get five focus keywords per post as standard and sixteen or more types of structured data. A redirect manager and a 404 monitor are included too. The latter tracks which addresses on your site do not exist (Rank Math on WordPress.org).

PRO costs $7.99 a month, billed yearly. On renewal that becomes $107.88 a year (Rank Math pricing). You may use PRO on unlimited sites of your own, but not on client sites. For those there are Business ($24.99 a month, 100 client sites) and Agency ($54.99 a month, 500 client sites).

The most notable AI feature in PRO is AI Link Genius. You make a list of keywords, each with the page they should link to. Click “Preview & execute” and Rank Math shows which links it wants to add to your posts. You untick what you do not want, and it places the rest, by default up to three per post.

Turn on “Auto-link on publish” and that also happens for new posts, without you looking. You can roll back every link through the history.

The writing help is called Content AI: more than forty AI tools, including titles and descriptions in bulk and alt text. It is a separate subscription, from $71.88 a year (Content AI). A new PRO, Business or Agency subscription comes with a fifteen-day trial, after which you get a limited free monthly allowance.

Our advice: choose Rank Math PRO if you run several sites of your own and want internal links placed automatically. Keep your keyword list narrow, though. Say the Columbus law firm enters the keyword “termination”. Rank Math then adds a link to the termination page in every post where that word appears, including a post about non-compete agreements, where the link does not help the reader. What makes a good link is in internal links in WordPress.

SEOPress: affordable for many sites, with your own AI key

SEOPress PRO costs $49 a year for one site and $59 for five sites. Unlimited sites cost $149 (SEOPress pricing). For an agency with many client sites, that is the lowest price in this lineup.

The AI works differently from Yoast. You connect an AI provider yourself, such as OpenAI, Claude, Gemini, Mistral or DeepSeek. For that you need an API key: a code from that AI service. Or you buy SEOPress AI Credits, from $19 a month. SEOPress PRO then writes titles, descriptions and alt text for you.

There is also a fully automatic mode. Publish a post with an empty title or description field and SEOPress fills it on publish. A title or description you wrote yourself is never overwritten. And if you update an existing post, nothing happens (SEOPress guide).

SEOPress is good and cheap, but the automatic mode has no approval step. So read the first ten descriptions. An AI that writes “Welcome to our website” as a description is something you only notice when you look. What a good description looks like is in writing a meta description.

AIOSEO, and why you look at the second year

AIOSEO has a free Lite version and four paid plans. The first year, Basic costs $49.50 for 1 site and Plus $99.50 for 3 sites. Pro costs $179.55 for 10 sites and Elite $239.60 for 100 sites (October 2026 prices, AIOSEO pricing). Renewal is at full price: Basic then becomes $99 a year.

Every plan includes AI credits, from 10,000 on Basic to 200,000 on Elite. With them you have titles, meta descriptions, FAQs, summaries and entire posts written. With “Optimize with AI” AIOSEO rewrites your title, description, heading and text in one click (Optimize with AI). The Link Assistant, which suggests and places internal links, is only in Pro and Elite.

So with AIOSEO, look at the second-year price: that is what you keep paying. And if you rewrite whole pages with one click, read whole pages too. See AI content that does not sound like AI.

Lighter: The SEO Framework and Slim SEO

There are also leaner plugins without AI writing help. The two best known are The SEO Framework and Slim SEO. The SEO Framework is free, with paid plans from $7 a month billed yearly (October 2026 price). The pricing page lists no AI writing features (The SEO Framework pricing). Slim SEO is free too and has a Pro version with a schema builder and an internal linking tool (Slim SEO).

Which SEO plugin fits your situation?

If you have one site with ten to fifty pages, keep the free plugin that is already there. Choose a paid version only once you know what you want to automate.

Your situation	Plugin that fits	Why
Freelancer or small business with one site, such as a law firm	Free Yoast or free Rank Math, whichever is installed	Fields, sitemap and schema are in the free version. Your time is better spent on titles than on switching
You want AI help but approve everything yourself	Yoast Premium ($118.80 a year)	Every AI change waits for your approval, also in bulk
WooCommerce store with hundreds of products	Yoast with WooCommerce SEO, or AI+ ($358.80 a year)	AI titles and the bulk editor then also work for your product catalog
Several sites of your own	Rank Math PRO ($7.99 a month)	Unlimited own sites and automatic internal links
Agency with many client sites	SEOPress PRO unlimited ($149 a year) or Rank Math Business ($24.99 a month)	Per-site licenses add up fast with twenty clients

We advise against switching for one AI feature. A switch costs an afternoon, plus the risk that titles or redirects do not come across. If you do switch, SEOPress has a one-click import from other SEO plugins in its free version. Afterwards, check ten pages in the source code before you remove the old plugin.

Want to see other tools next to your plugin, free and paid? Read the best SEO tools for small businesses.

What a plugin does not take off your hands

A plugin with AI writes a title when you ask. Which page needs a new title, you have to see yourself. Some plugins help with numbers. Rank Math connects Google Search Console even in the free version. AIOSEO shows in its Elite plan which posts are losing visitors (AIOSEO Search Statistics). Reading the numbers and choosing the page remains your work.

Only the AI features side by side, with what runs on its own and what does not, are in AI plugins for WordPress SEO.

Back to the Columbus law firm. Its wrongful termination page got 3,100 impressions and 41 clicks in three months. That is a click-through rate of 1.3 percent, and that page has the most to gain.

The title is now “Termination | Firm Name” (23 characters). A better title is “Wrongful Termination Lawyer in Columbus | Firm Name” (51 characters). The keyword comes first, and the reader sees right away that they are in the right place. After four weeks, compare the clicks with the four weeks before. How to find and measure such pages is in improve your SEO.

GreatCompany on top of your SEO plugin

GreatCompany works with Yoast, Rank Math, SEOPress and AIOSEO, or with no SEO plugin at all. With Automatic, GreatCompany prepares up to five improvements on its own every Monday, for titles, descriptions, internal links and alt text, and applies them on your WordPress site. Automatic costs $99 a month, is made for WordPress and has no annual contract.

By default, page improvements go through automatically. Want to read everything first, as with Yoast? Then every proposal lands in your inbox first, and you reply Yes or No. Whether it paid off is in your overview email: from four weeks after an improvement, it shows how many extra clicks those pages got from Google. You connect with the GreatCompany plugin and the “Connect to GreatCompany” button. Your WordPress password never goes into GreatCompany.

For the Columbus law firm it looks like this. The page “Employment Law | Firm Name” (26 characters) is called “Employment Lawyer in Columbus, Ohio | Firm Name” (47 characters) after the Monday round. Read how to automate WordPress SEO and how the plugin works.