Every roundup of the best AI SEO tools compares the same feature grid, and the grid is close to useless. Nine products will all claim keyword research, article generation, internal linking and CMS publishing. The differences that decide whether you are glad you bought it show up somewhere else: in what happens to a draft between the writer and your domain, in where the traffic number on the dashboard comes from, and in whether anyone can tell you the work caused the result. This piece compares on those three things. Every competitor figure was read off the vendor's own live pricing page on 4 September 2026.
How to compare the best AI SEO tools without a feature grid
Ask four questions. Each one has a checkable answer, and each one splits the category differently from the marketing.
What is the unit you are buying? A finished published article, a word, a credit, or a seat. This decides your real cost and it is where the price comparisons quietly break.
What runs between the writer and your site? Some products are a writer with a publish button. Some run checks on the finished draft and can refuse to send it.
Where does the reported result come from? Your own Google Search Console, the vendor's estimate, or a chart with no stated source.
Can it tell you whether the work caused the change? Almost nothing in this category attempts this. It is the difference between a dashboard and evidence.
The tools, with prices from their own pages
Rankli
$99 a month on Growth for 30 articles on one site, $899 for 60 across four sites, $1,200 for 90 across five, and a $1 trial that gives you three finished articles in fourteen days. Add-ons take one site to 60 articles for $85 or 90 for $160. Every draft passes fifteen checks. Publishing goes to ten destinations: WordPress, WordPress.com, Webflow, Shopify, Wix, Ghost, Notion, Framer, a Next.js blog and a signed webhook, with a REST API and a CLI behind the same pipeline. Traffic comes from your Search Console. Citations are measured across ChatGPT, Perplexity, Gemini and Claude on every plan.
Outrank
Their pricing page lists $99 a month for the All-in-One Plan, 30 articles a month described as one a day, eight publishing destinations, unlimited users, and volume discounts of 10% to 20% for two to twenty-five sites. Add-ons on the same page: 60 articles for $85, 90 for $160, Premium Images $49 a month, Human Curated Service $1,399 a month, Backlink Premium $199 a month. Article length is not stated on the pages we read.
RankYak
Their pricing page lists RankYak Pro at $99 a month, or $82.50 billed yearly, for 30 articles a month, with a three-day full-access trial. It lists Search Console integration, a keyword plan refreshed monthly, and an agency model that prices every client site the same as the first. Site Guard, at $99 a month, is listed as rewriting existing pages that are losing ground.
SEObot
Their homepage states subscriptions start at $49 a month, an average article length of 3,000 words, internal linking with monthly re-linking, and nine CMS destinations plus REST, webhooks, Zapier and Make. Per-tier article allowances are not on the public page, so ask before you buy if the number matters.
Koala AI
Their pricing page lists Essentials at $9 a month for 15,000 words and 250 credits, a free allowance of 5,000 words and 25 credits with no card, KoalaLinks internal linking from the Professional plan at $49 a month, and Search Console plus Analytics in one dashboard from that same tier. It is priced by the word, so the cost per article is arithmetic you do yourself.
Byword
Their pricing page states Starter at $99 a month for 25 articles, Standard at $299 for 80, Scale at $999 for 300, and a free start of five articles. On published pieces per dollar at the top tier, nothing else on this list is close.
Surfer
Their pricing page lists Discovery at $49 a month billed yearly, described as creating or optimising 120 documents and tracking 10 pages, with a start-for-free action on every plan. Surfer is an optimisation surface for documents you are working on rather than a pipeline that publishes without you.
Jasper
Their pricing page lists Pro at $69 a month per seat billed monthly, or $59 billed yearly, with a seven-day free trial. It is sold per seat to marketing teams and covers campaigns, brand governance and images as well as articles, so compare it on the whole marketing job rather than on cost per article.
Writesonic
Their pricing page, with the annual toggle selected, lists Starter at $79 a month for 15 AI articles, Basic at $199 for 25 and Growth at $399 for 50, with a free trial action on every plan card. Their plans bundle brand tracking across AI assistants alongside the writing.
What the grid will not tell you
The gate between the writer and your domain
This is the one that costs money when it is missing. A model asked for 2,000 words will produce a sentence that opens with "according to" and closes on a precise-looking percentage, with total confidence and nothing behind it, and an automatic publisher will put that under your byline.
Rankli's answer is fifteen rules that run on the finished draft, eleven of them blocking. The word count has to land between 1,500 and 3,000. There must be one H1 and no skipped heading levels. The keyword has to appear in the title, the opening 100 words and at least one H2, and stay under 2.5% of total words. Any phrase on your banned list fails the draft. A percentage sitting in the same sentence as attribution language fails it. An H2 with nothing under it fails it. An article that never mentions what you sell, outside the keyword phrase it was told to rank for, fails it. A failed hard rule regenerates the draft once, and the project setting "hold drafts that fail checks" keeps it in the app instead.
You can run those same fifteen checks on a draft from any tool, free, in the SEO article checker. It is the fastest way to compare two products, because it reads the output rather than the marketing.
Where the traffic number comes from
Ask this of any dashboard you are shown in a demo. Rankli reports from your own Google Search Console property and never substitutes for it: no estimates, no interpolation, and a day Google did not report renders as no data rather than a zero. A tool that fills gaps to keep a line smooth is teaching you to trust a shape that was drawn rather than measured.
Whether AI assistants cite you
Buyers now ask ChatGPT and Perplexity what to buy, and the answer either names you or does not. Rankli tracks a set of your buyers' questions across four engines on every plan, with repeated runs per question because the answers move on their own. From Growth up, each change is registered as a prediction before the data exists and read out against a held-out control group of questions, which is the only way to separate your work from the platform's drift. Our calibration harness built 150 independent worlds and ran the same window twice, once with the intervention and once without, from identical seeds: the difference-in-differences estimator covered the true effect 92.7% of the time with a bias of −0.03 points, while the pre/post estimator most tools use overstated a true 2.3-point effect by 31%. The full method is on the AI citation proof page.
The arithmetic nobody does for you
Price per finished article is the number that makes these plans comparable, and three of the pricing models above hide it.
Priced by the article, the sum is one division. Rankli's Growth plan is $99 for 30, which is $3.30 each. The Agency plan is $1,200 for 90 across five sites, which is $13.33 each and buys five separate calendars, voices and connections.
Priced by the word or the credit, you supply the missing assumption. A 15,000-word monthly allowance is ten articles at 1,500 words, or five at 3,000, and the answer changes with the model you pick if the vendor counts some models at two or three times the rate. Decide your article length first, then divide.
Priced by the seat, the article count is unbounded and the constraint is people. That is the right shape if writers are the bottleneck and the wrong shape if publishing volume is.
Then add the things that are separate line items elsewhere: images, internal linking, a human editor, extra sites. A $99 plan with three $199 add-ons is a $700 plan. Write the total for a year next to each name on your shortlist before you look at any feature grid again.
Which one to buy
One site, no content team. You want a full pipeline at a fixed price with a check before publishing. Rankli's Growth plan at $99 is built for exactly this, and the $1 trial answers the writing question in a fortnight.
An agency with five clients. You need separate calendars, voices and CMS connections per client, and per-client reporting. Rankli's Agency plan is 90 articles across five sites at $1,200. Read our agency page for how the calendars and approvals split.
A Shopify store. You want articles that name your actual products and link to them, published to the store blog. Rankli's Shopify app publishes product-led articles from your catalogue, with three free to start.
A team that lives in a writing tool. If your writers want to sit in an editor with a model beside them, buy the tool built for that shape of work. Pipelines are the wrong answer to that job.
Whatever the shortlist, buy the entry tier of two products, give both the same keyword and the same banned phrases, and read the drafts. Two hours of reading beats two weeks of comparison pages. Our pricing page has every Rankli plan, limit and add-on in one table.
Start Rankli for $1: three finished articles in your voice, published live to your own site, each with its scorecard attached. Cancel from the app any day, unused articles refunded.