DiagnoSEO vs SEOptimer (2026): which should you pick?
As of Oct 23, 2026, DiagnoSEO and SEOptimer share a 2.6 GPA, and only SEOptimer has a free plan.
Checked Oct 17, 2026 and Oct 23, 2026 · graded Oct 17, 2026 and Oct 23, 2026 by ToolGPA
DiagnoSEO 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.
DiagnoSEO
Credit-based SEO toolkit with audits, keyword tools and AI writing
SEOptimer
SEO audit tool with white-label reports and a lead-generation widget
Which one is for you
Pick DiagnoSEO if
- Fits if you run WordPress sites and want the DiagnoSEO Pro plugin with your SEO tools
- Works for freelancers running audits and keyword checks now and then on a small budget
Look elsewhere if
- Pricey if you need rank tracking or the API, as both start on Enterprise at $129 per user a month
- Tight if you're on Basic, as 60 credits a month is six keyword ideas reports at 10 credits each
- Watch out: extra credits are $1 per 10, need an active plan and expire after a year
- Watch out: monthly and annual plans list different limits, such as 100 projects monthly but 50 yearly on Pro
- Not for you if you want a free plan, as there's only a 7-day trial and refunds cover a first purchase within 7 days
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
| 2.6GPADiagnoSEOGood | 2.6GPASEOptimerGood | |
|---|---|---|
| Value for money | ABasic is $9 per user a month, under 60% of this category's cheaper quarter, for 20 tools, 60 credits and 5 projects. The catch: a keyword ideas report is 10 credits, and rank tracking needs Enterprise at $129. | 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 | CNo free plan, but a 7-day free trial of Basic, and Advanced can be tried for $7. Refunds cover a first purchase only, within 7 days. | 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, a site crawler, a SERP analyzer, keyword research, a backlink checker, a content editor, AI articles and a WordPress plugin. The gap the listing names: rank tracking only comes with Enterprise. | 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 | CNo rating on record. Each tool spends a different number of credits, from 1 for an audit to 10 for a GPT-4o article, so there's a meter to keep an eye on. | 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 plus a WordPress plugin, connected to Search Console, with an API on Enterprise. No desktop or phone app. | 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 | credit-based SEO tools with a WordPress plugin | 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: DiagnoSEO and SEOptimer. How we grade
Price against what you get
DiagnoSEO starts at $9 a month for each person and scores 2.3 out of 4 on features, ease of use and platforms. SEOptimer starts at $21.75 a month and scores 2.7.
SEOptimer scores higher, and starts $12.75 a month higher: the question is whether the extra is worth that to you. Of the other SEO tools on the chart, 1 scores higher than DiagnoSEO for less, and none scores higher than SEOptimer for less.
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
Where they differ
- DiagnoSEO also covers long-form writing and content optimization.
- SEOptimer also covers reports and rank tracking.
At a glance
| DiagnoSEO | SEOptimer | |
|---|---|---|
| Pricing | Free trial | Free plan |
| Starts at | $9 per user / month, billed monthly | $21.75 per month, billed annually ($29 billed monthly) |
| Free plan | None | 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 | 7-day free trial of the Basic plan; the Advanced plan can be tried for $7 | 14-day free trial with full access to the plan's features |
| Web | ||
| Browser extension | ||
| Made by | DiagnoSEO | SEOptimer Pte. Ltd. |
| Price read from | diagnoseo.com | web.archive.org (not the vendor's own page) |
| Checked | Oct 23, 2026 | Oct 17, 2026 |
Worth knowing
DiagnoSEO
- Tools spend credits per use (an SEO audit 1, a GPT-4o article 10); extra credits cost $1 per 10, need an active plan and expire after a year.
- Rank tracking, API access and the embeddable audit tool come only with Enterprise at $129 per user a month.
- Monthly and annual plans list different limits: Pro has 100 projects monthly but 50 annually, and Enterprise tracks 500 or 5,000 keywords.
- Refunds cover the first purchase only, if asked within 7 days. The WordPress plugin is also sold alone at $49 a year, shown cut from $69.
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
DiagnoSEO
- SEO audit and site crawler
- Checks a page against more than 200 on-page factors, with an advanced audit at 3 credits, and crawls whole sites; the pages allowed per crawl rise with the plan.
- SERP Analyzer and visibility checker
- The SERP Analyzer compares the pages ranking for a keyword and gives AI tips on what to change; the Website Visibility Checker reports a domain's top 50 or top 1,000 keywords.
- Keyword research
- Keyword ideas from live Google autocomplete with search volume and intent, related keywords, questions, People Also Ask, a topical map and bulk volume checks of 1,000 keywords.
- Content Editor and AI writing
- Semantic keyword recommendations while you write, plus AI articles of up to 5,000 words with GPT-4o mini or GPT-4o, rewriting, outlines, headlines and internal link suggestions.
- Backlink checker
- Lists the linking domains and pages for any site, with broken backlinks, anchor text distribution, link locations and linking TLDs at no extra credit.
- WordPress SEO plugin
- The DiagnoSEO Pro plugin adds AI titles and meta descriptions, schema, content analysis, sitemaps, redirections and internal links to WordPress sites.
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
DiagnoSEO
Basic$9
per user / month, billed monthly
20 tools, 60 credits, 5 projects and the DiagnoSEO Pro WordPress plugin on 5 sites. Has a 7-day free trial.
Advanced$19
per user / month, billed monthly
30+ tools including the advanced ones, 200 credits, 20 projects and the WordPress plugin on 10 sites. Can be tried for $7.
Pro$39
per user / month, billed monthly
60+ tools, 400 credits, 100 projects (50 on annual billing), the plugin on unlimited sites and the WordPress theme builder on 30 sites.
Enterprise$129
per user / month, billed monthly
1,600 credits, 1,000 projects, rank tracking, an embeddable audit tool, custom audits, bulk content generation, API access and dedicated support.
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
DiagnoSEO
- Annual discount
Two months free with annual billing
DiagnoSEO says annual billing saves 16%, or two months free: Basic is $90 per user a year instead of $9 a month.
- Other savings
10% off renewals at the regular price
The pricing FAQ says subscriptions renewed at the regular price get a 10% discount, the same on every plan.
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, DiagnoSEO or SEOptimer?
As of Oct 23, 2026, DiagnoSEO starts at $9 per user / month, billed monthly, and SEOptimer starts at $21.75 per month, billed annually ($29 billed monthly). One is priced for each person and the other is not, so which costs less depends on how many of you use it.
Which has a free plan, DiagnoSEO or SEOptimer?
As of Oct 23, 2026, only SEOptimer has a free plan. DiagnoSEO does not, though it has a free trial.
Which platforms do DiagnoSEO 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.