SEO Score API vs SEOptimer (2026): which should you pick?
As of Oct 24, 2026, SEO Score API and SEOptimer share a 2.6 GPA, both have a free plan, and SEO Score API starts cheaper, at $5 a month against $21.75 a month.
Checked Oct 17, 2026 and Oct 23, 2026 · graded Oct 17, 2026 and Oct 24, 2026 by ToolGPA
SEO Score API grades higher on value for money. SEOptimer grades higher on ease of use. They get the same grade on the free plan, features and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
SEO Score API
SEO audit API that scores any URL on 80+ checks, AI readability too
SEOptimer
SEO audit tool with white-label reports and a lead-generation widget
Which one is for you
Pick SEO Score API if
- Fits if you want a build to fail when a page's SEO score drops
- Works for developers adding page checks to their own apps or dashboards
Look elsewhere if
- Skip it if you need backlinks, keyword research or rank tracking, which it doesn't do
- Tight if you're on Free, with 20 audits a month and only 2 checks per category shown
- Pricey if you want Deep Site Audits, which start on Pro at $39 a month or $12 for a single audit
- Watch out: extra AI citation checks cost $10 for 500, and the pages don't say which AI engines are checked
- Watch out: the product is labeled as being in public beta
Pick SEOptimer if
- Fits if you're an agency sending clients audits with your own logo, from White Label at $29.25 a month
- Works for small sites that want a list of on-page fixes in priority order
Look elsewhere if
- Too light for real rank tracking, with 20 keywords and 25 keyword searches on DIY SEO
- Tight if you crawl often, as DIY SEO allows 4 crawls of one site
- Pricey if you want the lead form, webhooks or Zapier, which need Lead Generation at $44.25 a month on yearly billing
- Watch out: local SEO packs from $29 a month, extra GEO audits and the API from $100 a month are separate add-ons
- Not for you if you want to pay with PayPal or use a phone or desktop app, as it takes cards only and runs on the web
How we grade them
| 2.6GPASEO Score APIGood | 2.6GPASEOptimerGood | |
|---|---|---|
| Value for money | AStarter is $5 a month for 200 audits with all 80+ checks, under 60% of this category's cheaper quarter, and Pro is $39 for 5,000 with 20 deep audits. Google's Lighthouse, one of its listed alternatives, is free, though. | BDIY SEO is $21.75 a month on yearly billing ($29 monthly), right on the line of this category's cheapest quarter. The limits are tight for the money: 4 crawls of 1 site, 20 tracked keywords and 25 keyword searches. |
| Free plan and trial | CA free plan for good with no card, but tight: 20 audits a month on 50+ checks, showing only 2 checks per category and the top 2 fixes, at 2 requests a minute. | CFree single-page audits from the Chrome extension with no account, limited per day, plus a 14-day trial with the plan's full features. Fine for checking pages, not for running your SEO. |
| Features | CPage audits done fully: 80+ checks, AI readability, SXO, AEO and AIO scores, monitoring, history and a 14,000+ check deep audit from Pro. It's a smaller job, though: no backlinks, keyword research or rank tracking, which the vendor says to get from Ahrefs or Moz. | CPage audits, a site crawler, keyword and backlink research, rank tracking, an AI writer, white-label reports and a lead-capture audit form. Broad, but the listing shows the gaps: 4 crawls and 20 tracked keywords on DIY SEO. |
| Ease of use | CJudged on how fast a developer gets a first result: send a URL and get a score back, with Python, Node.js and Go clients and a GitHub Action. No rating on record. | BNo rating on record, but there's little to set up: paste a URL or click the extension and you get an audit with fixes in priority order. |
| Platforms and integrations | BWeb, with an API, Python, Node.js and Go clients, an n8n node, an MCP server, a Claude Code skill and a GitHub Action, plus Vercel and Netlify. No desktop or phone app, so B is the top. | BWeb plus a Chrome extension, with Zapier and webhooks on Lead Generation and an SEO Audit API as a paid add-on from $100 a month. No desktop or phone app. |
| Best for | SEO scores for single pages from your own code | branded SEO audits for agencies |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: SEO Score API and SEOptimer. How we grade
Where they differ
- SEO Score API also covers AI search visibility.
- SEOptimer also covers reports, keyword research, rank tracking and backlink analysis.
At a glance
| SEO Score API | SEOptimer | |
|---|---|---|
| Pricing | Free plan | Free plan |
| Starts at | $5 per month for 200 audits, billed monthly | $21.75 per month, billed annually ($29 billed monthly) |
| Free plan | 20 audits a month scored on 50+ checks, showing 2 checks per category and the top 2 fixes, at 2 requests a minute. No card needed. | Free SEO audits of any page from the Chrome extension, with no account needed; free users are limited in how many audits they can run a day. |
| Free trial | None listed | 14-day free trial with full access to the plan's features |
| Web | ||
| Browser extension | ||
| Made by | 45Squared | SEOptimer Pte. Ltd. |
| Price read from | seoscoreapi.com | web.archive.org (not the vendor's own page) |
| Checked | Oct 23, 2026 | Oct 17, 2026 |
Worth knowing
SEO Score API
- It audits pages only: no backlinks, keyword research or rank tracking, which the vendor says to get from suites such as Ahrefs or Moz.
- Deep Site Audits come only with Pro (20 a month) and Ultra (100), or as credit packs from $12 for one audit to $499 for 100.
- Extra AI citation checks cost $10 for 500 or $36 for 2,000; the pages read do not say which AI engines are checked.
- The product is labeled as being in public beta.
SEOptimer
- Limits are tight on DIY SEO: 4 crawls of one site, 20 tracked keywords and 25 keyword searches.
- White-label reports need the White Label plan, and the embeddable lead form, webhooks and Zapier need Lead Generation.
- Local SEO packs (from $29 a month), extra GEO audits and the SEO Audit API (from $100 a month) are separate add-ons.
- Payment is by credit card only; PayPal is not accepted.
Key features
SEO Score API
- 80+ checks per URL
- Titles, headings, canonical tags, robots.txt, sitemaps, structured data, Open Graph, page weight and accessibility, each marked pass, warning or fail with a fix.
- AI readability and GEO audits
- 26 checks on whether AI crawlers such as GPTBot and ClaudeBot can read a page, including llms.txt and bot access; GEO audits measure visibility to AI search.
- SXO, AEO and AIO scores
- Paid plans score search experience, how well a page answers questions for snippets and AI Overviews, and how easily language models can take it in.
- Deep Site Audit
- An asynchronous audit of about 90 seconds against a 14,000+ check catalog across nine areas, with an AI pass and a scan for leaked API keys.
- Monitoring and history
- Watch scores on a set of URLs, pull a page's score history, run batch audits, and share HTML reports and score badges.
- SDKs, CI and agents
- Python, Node.js and Go clients, an n8n node, an MCP server, a Claude Code skill and a GitHub Action that fails a build when a score drops.
SEOptimer
- SEO and GEO audits
- Checks a page's on-page elements, crawlability, speed and Core Web Vitals, backlinks, social and local details, and signals AI search engines use.
- White-label PDF reports
- Reports carry your logo, colors and company details, can be produced in 15 languages and scheduled; from the White Label plan.
- Lead-generation audit form
- An audit widget for your own website that collects visitors' contact details with each audit and sends leads by email, webhook or Zapier.
- Site crawler
- Crawls every page of a site to find problems in depth, with the number of crawls set by plan.
- Keyword and backlink research
- Keyword research, rank tracking, backlink research and backlink change monitoring, each with monthly limits by plan.
- Chrome extension
- Runs a full audit of the page in the current tab, with prioritized recommendations, without needing an account.
Plans
SEO Score API
Free$0
20 audits a month on 50+ checks, with partial results, no history and no AI citation tracking.
Starter$5
per month for 200 audits, billed monthly
All 80+ checks, SXO, AEO and AIO scores, AI citation tracking with 15 prompts, 5 monitored URLs and 30 days of history.
Basic$15
per month for 1,000 audits, billed monthly
Adds 1 GEO audit a month, 30 tracked prompts, 10 monitored URLs and 90 days of history.
Pro$39
per month for 5,000 audits, billed monthly
20 Deep Site Audits, 5 GEO audits, 75 tracked prompts, 25 monitored URLs, a year of history and priority support.
Ultra$99
per month for 25,000 audits, billed monthly
100 Deep Site Audits, 10 GEO audits, 200 tracked prompts, 50 monitored URLs, unlimited history and dedicated support.
EnterpriseCustom
Custom audit volume and limits on an annual agreement with invoicing. Through sales.
SEOptimer
DIY SEO$21.75
per month, billed annually ($29 billed monthly)
SEO audits for your own site, 4 crawls of 1 site, 20 tracked keywords, 25 keyword and 25 backlink searches, 20 AI articles a month.
White Label$29.25
per month, billed annually ($39 billed monthly)
Branded PDF audit reports, 10 crawls, 100 tracked keywords, 100 keyword and 50 backlink searches, and 3 users.
Lead Generation$44.25
per month, billed annually ($59 billed monthly)
Adds the embeddable audit form for leads, webhooks and Zapier; 50 crawls, 250 tracked keywords and 6 users.
CustomCustom
Custom limits, requirements and API integration for enterprises, arranged by chat with the sales team.
Ways to pay less
SEO Score API
- Annual discount
Two months free with annual billing
SEO Score API bills paid plans yearly for the price of 10 months: Starter is $50 a year and Pro $390, with monthly allowances unchanged.
SEOptimer
- Annual discount
25% off with annual billing
SEOptimer's pricing FAQ offers annual billing on every plan at 25% off the monthly price, which it likens to three months free.
Common questions
Which is cheaper, SEO Score API or SEOptimer?
As of Oct 23, 2026, SEO Score API is cheaper to start with: $5 a month, against $21.75 a month for SEOptimer. SEO Score API starts at $5 per month for 200 audits, billed monthly, and SEOptimer starts at $21.75 per month, billed annually ($29 billed monthly).
Which has a free plan, SEO Score API or SEOptimer?
As of Oct 23, 2026, both SEO Score API and SEOptimer have a free plan.
Which platforms do SEO Score API and SEOptimer run on?
As of Oct 23, 2026, only SEOptimer lists a browser extension. Both list a web app. A platform missing from a listing is one its maker's pages did not mention.
More comparisons
How this page was made
- The verdict at the top follows a fixed rule. When both tools are in the same category and either is in our top three for it, the verdict follows that ranking: the higher-placed tool is our pick. The top three weigh who each tool suits as well as its grades, so a pick can go against the GPA. Otherwise the page does not pick one and says which grades higher: the higher GPA first; on a tie, the one with a free plan, then the one that starts cheaper in dollars a month, counted the same way for both; if they are still level, what the choice depends on.
- The grades are our own, from each tool’s review or report card. The GPA is their average.
- Prices, plans and platforms come from each tool’s listing. The table above says where each price was read and when.
- The differences and the answers to the questions are worked out from those listings.