On-Page.ai
On-Page.ai is an SEO suite that scores a page against the results already ranking for a keyword, then rewrites and optimizes it. It bundles the Stealth Writer article generator, AI-content detection and a REST/MCP API.
What is On-Page.ai?
On-Page.ai is an SEO platform built around a single idea: rather than scoring a page against generic best practices, it compares it directly with the pages Google already ranks for the keyword you care about. You enter a target keyword, optionally the URL you want to improve, and the scanner returns the terms and entities your page is missing, the Google category your term belongs to, the internal links worth adding and a prioritized list of fixes. The vendor calls this Triple Ranking Technology and says it pairs Google's own natural-language processing with in-house models; its crawler separates main content from sidebars, headers, footers and advertising, so recommendations apply to the text that actually counts.
Several modules sit around that scanner. The AI Optimizer, included in every plan, grades a page on title, intent, sourceability, quotability, freshness, authority and visual first impression. Auto-Optimize inserts related entities into a draft in one click. Link Relevancy rates the contextual relevance of inbound links, Predictive Guest Post scores a guest article before it goes live, the Topical Keyword tool maps a keyword to a category and suggests aligned subjects, and an experimental AI-detection scanner flags machine-written pages across a site.
The second half of the product is the Stealth Writer, an article generator now in version 5. It researches a topic online before writing, can crawl your own site to fold your business into the text, produces articles averaging over 3,500 words with a generated image, checks each one against the vendor's own AI detector and ships with a WordPress plugin for bulk publishing.
A third surface, on a separate subdomain, exposes the same analysis as a REST API and an MCP server: four endpoints covering standard, lite and deep scans plus classification into 1,091 categories, asynchronous jobs, webhooks, 27 Google SERP regions and eight MCP tools that Claude, ChatGPT, Cursor or n8n can call directly. The vendor is explicit about the boundary: this is not a rank tracker, a backlink index or a keyword-volume provider.
What it does
- Score a page against the results currently ranking on Google for a keyword
- Surface the entities, terms and headings a page is missing
- Generate long-form researched articles with the Stealth Writer
- Rewrite and auto-optimize existing copy by injecting related entities
- Measure the contextual relevance of inbound and internal links
- Predict the SEO value of a guest post before publishing it
- Detect AI-written pages across a whole site or in a single document
When to use On-Page.ai / When not to
A quick filter to help you decide if On-Page.ai is the right fit.
When to use On-Page.ai
- SEO agencies juggling several client sites at once
- Solo founders and bloggers optimizing their own pages
- Content teams publishing long-form articles in volume
- In-house marketers running enterprise SEO workflows
- Developers wiring scan data into a product or an AI agent
When not to use On-Page.ai
- Anyone shopping for rank tracking, backlink indexes or keyword volumes, all three excluded by the vendor
- Tight budgets: the cheapest plan is USD 129 per month and there is no permanent free tier
- Teams working outside English on categorization, link relevancy or guest-post scoring
- Organizations that require a signed DPA, an EU Article 27 representative or a written GDPR commitment
- People who want a mobile app: there is no iOS or Android release
How to use On-Page.ai
A typical end-to-end flow, from setup to results.
- Create a free account on the registration page; no credit card is needed to look inside
- Activate a plan from the dashboard once you know which modules you need
- Enter the keyword you want to rank for, and optionally the URL of the page to improve
- Read the scan report: missing entities, highly related words, Google category, internal-link suggestions
- Apply the fixes in the built-in content editor, or let Auto-Optimize insert the entities for you
- Send a topic to the Stealth Writer when you need a new article rather than an edit
- Push finished articles to WordPress with the bulk-publishing plugin
- Submit your inbound links to Link Relevancy, or a draft article to Predictive Guest Post
- Run the AI-detection scanner over a list of URLs before publishing
- For automation, create an API key and call the REST endpoints, or connect the MCP server to Claude, ChatGPT or Cursor
Pros & Cons
Pros
- Recommendations come from the pages actually ranking, not from third-party authority metrics
- Audit, writing, link analysis and AI detection sit under a single subscription
- The API and MCP server are documented publicly, with a named report schema and published rate limits
- All plan prices are shown openly, with no contract and cancellation at any time
- A seven-day money-back guarantee covers the suite, and registering costs nothing
- Suite subscribers receive monthly API credits without buying a separate plan
- Live training, replays and a help centre are included, and the vendor offers to train teams
Cons
- Entry price of USD 129 per month, with no permanent free plan
- The suite's legal documents date from January 2023 and lag three years behind the API's
- No postal address and no legal-notice page anywhere on the site
- No GDPR commitment, no data processing agreement and no EU representative
- A data-access request under the suite's policy costs an administration fee and a certified passport copy
- Refunds are reduced by USD 30 per Stealth article, and Stealth plans are excluded outright
- Categorization, link relevancy and guest-post scoring work in English only
Pricing & Plans
There is no permanent free plan. Registration is free and requires no credit card, which allows a look inside the product before paying, and new API accounts receive starter credits. The cheapest paid plan of the On-Page suite is USD 129 per month, billed monthly with no contract and cancellable at any time. The API is priced separately in credits: custom top-ups start at USD 50, the smallest listed pack is USD 99 for 200 credits, and the cheapest monthly API plan is USD 229. A seven-day money-back guarantee applies to the suite, excluding Stealth articles.
- USD 129 per month
- USD 229 per month
- USD 229 per month
- USD 299 per month
- USD 399 per month
- USD 499 per month
- USD 599 per month
- USD 1999 per month
- USD 3499 per month
- USD 229 per month for 500 credits
- USD 499 per month for 1
- 400 credits
- USD 999 per month for 3
- 000 credits
- USD 99
- 399
- 1
- 799 or 4
- 999
- with custom top-ups from USD 50
- Custom plans on request beyond the published tiers
Data, GDPR & hosting
A consolidated view of how On-Page.ai handles your data.
GDPR overview
There is no mention of the GDPR anywhere on the site. None of the four legal documents uses the word: neither the suite's terms and privacy policy from January 2023, nor the API's terms and privacy policy from April 2026. That is silence rather than refusal, since the vendor neither claims compliance nor denies it. Some adjacent material exists. The suite's policy warns that data may be transferred to countries without protection equivalent to the European Economic Area, and the API policy promises unnamed appropriate safeguards for international transfers. The API side lists rights of access, correction, deletion, portability and consent withdrawal, exercised through privacy@on-page.ai. The suite, by contrast, charges an administration fee for a data-access request and asks for a certified passport copy. No DPA, no Article 27 EU representative and no data protection officer are published.
Who owns the data?
Ownership depends on which contract applies. The API terms of April 2026 state that you keep ownership of anything you submit and grant On-Page only a limited licence to process it while delivering the service; the vendor explicitly disclaims ownership of your content and will not train models on it without your consent. The suite's terms, unchanged since January 2023, are far broader: submitting content grants LanPublications a worldwide, irrevocable, non-exclusive, royalty-free licence to use, reproduce, adapt, publish, translate and distribute it in any existing or future medium, with the right to sub-license. Deleting your account triggers automatic deletion of the stored data.
Reuse rights
The two contracts diverge here as well. Material published by On-Page itself may only be streamed for personal use: you must not resell access, share it through a group buy, sub-license it, reproduce it for commercial purposes, or download and resell the training videos. On the API side you may not resell or redistribute API access without authorization, nor reverse-engineer the service. Nothing restricts what you do with the scan reports and articles the tool produces for you: publishing them on your own or a client's site is the advertised purpose, and the WordPress plugin exists for exactly that. Systematic scraping of the On-Page site itself requires written consent.
Data retention & training
Hosting summary
The API privacy policy of April 2026 is the only document that locates the infrastructure, and it does so loosely: hosting and compute providers are said to run servers in North America and Europe, with no country, no provider and no region-selection option named. It adds that data may be processed in countries other than your own, under unspecified appropriate safeguards for those transfers. The suite's older policy says only that personal data sits on secure, firewall-protected servers, and warns separately that information may be transferred to countries without protections equivalent to those in force in the European Economic Area. Outside the vendor's own statements, the domain resolves to an OVH address located in Montreal, Canada, which is consistent with the declared Montreal headquarters but is a network observation, not a hosting commitment. No data-residency choice, no regional isolation and no sub-processor page are offered.
Things to keep in mind
Risks and trade-offs to weigh before adopting On-Page.ai.
- Publishing generated articles at volume can flood a site with text nobody has actually read, and the vendor's own AI detector is described as experimental, so the safety net is not guaranteed
- The Stealth framing markets content engineered to pass AI detection; using it to misrepresent authorship carries editorial and reputational risk that no tool absorbs for you
- Leaning on an automated ranking score can quietly erode the habit of judging whether a page is genuinely useful to a human reader
- The suite's terms grant a worldwide, irrevocable, sub-licensable licence over the content you submit, a clause worth reading before uploading client material
- Requesting your own data under the suite's privacy policy costs an administration fee and a certified passport copy, which makes exercising that right deliberately expensive
- The refund guarantee shrinks by USD 30 per Stealth article and disappears entirely on Stealth plans, so the money-back promise is narrower than the homepage suggests
- A live legal page carries a visible internal marker, legal-review, final wording pending counsel review, on the clause waiving EU and UK withdrawal rights
Setup & Integrations
Technical difficulty
Low for the web interface. Nothing is installed: you register free of charge, activate a plan and run a first scan from the browser on any operating system. Live training, recorded replays and a help centre are provided, and the vendor offers to train a team at no cost. The API asks a little more: a bearer key, an asynchronous job pattern of submit, poll and fetch, plus optional webhooks. The MCP server is the easiest route for anyone already working in Claude, ChatGPT, Cursor or n8n, with a one-click install after signing in.
Deployment
Integrations
Supported languages
Behind On-Page.ai
Resources
All the official URLs gathered for verification and reference.
Alternatives
Tools that compete with or complement On-Page.ai.
Frequently asked questions
Can I use On-Page.ai for my clients?
Does it work with WordPress and e-commerce platforms?
Is there a free plan?
Which languages are supported?
Is there an API?
Is my content used to train models?
How long is my data kept?
What is the refund policy?
Who is behind the tool?
Is there a mobile app?
Should you pick On-Page.ai?
On-Page.ai is a working, well-documented product rather than a promise. Nine priced plans are published in the open, the API and MCP server come with a named report schema, per-action credit costs and published rate limits, a help centre covers seventeen product areas, and the domain has been live and continuously archived since 2021. The positioning is unusually frank for the category: the vendor states plainly that this is not a rank tracker, not a backlink index and not a keyword-volume source, but a tool that compares one page with the pages already winning its keyword and says what to change.
The weak point is everything around the product. There is no postal address, no legal-notice page and no register reference. The operating company appears as LanPublications in the suite's terms, as Lan Publications in the help-centre footer, and not at all in the API's own legal documents. Those documents themselves split in two: the API side was rewritten in April 2026 with concrete retention periods and a consent-gated training clause, while the suite still runs on policies from January 2023 that charge a fee and demand a certified passport copy for a data-access request. Nothing on the site mentions the GDPR, and no data processing agreement or EU representative is offered.
For an agency or a solo publisher optimizing and producing content in volume, the tool earns its USD 129 monthly entry point and the price ladder above it. For a regulated organization, or for anyone who needs contractual guarantees on data handling, the paperwork is not yet where the software is, and that gap is worth settling with the vendor before signing.
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