Overview

Founded by Jasja ter Horst in 2013 and headquartered in Groningen, the Netherlands, SEO Review Tools (SRT) is a free-tools-first SEO and AI platform in the communication & collaboration category. The platform offers 82 free real-time tools covering keyword research, rank checks, backlink checks, domain authority, page speed and AI content optimization, with over 180,000 registered members, about 185,000 monthly visitors and an average tool rating of 9.3/10.

SRT is positioned as a "fast, free SEO diagnostic entry point": unlike large subscription SaaS platforms, it lets individual webmasters, content creators and SEO beginners run basic site and keyword checks without spending money. It also offers a paid SEO API and a Chrome extension for bulk data collection and automated workflows.

Key Strengths

  • Completely free entry: 82 tools are largely free ($0), from keyword research to rank checks. See the SEO beginner's guide.
  • High community trust: Over 180,000 members, about 185,000 monthly visitors and a 9.3/10 average rating, used or cited by CNBC, Siemens and Nokia.
  • Rich AI-era tools: AI content optimization checks and AI brand visibility monitoring across ChatGPT, Gemini and Perplexity. See AI search optimization.
  • Extensible API: SEO API covers keyword, backlink, traffic, readability and AI visibility data, integrable with BI tools and AI agents. See SEO data monitoring.
  • Lightweight and fast: Most tools run instantly without registration, handy for quick page speed and SEO checks.

Product Ecosystem

Keyword Research Tool

A free Google keyword research tool supporting quick mobile lookups for long-tail keyword mining and content topic validation.

Rank & Authority Checkers

Google rank checker plus domain authority / page authority queries to quickly gauge a site's performance versus competitors.

Backlink & Page Checkers

Free backlink checker, duplicate content checker, HTML Headings Checker and word count tools for on-page diagnostics.

AI Toolset

AI Content Optimization Checker (content fit for AI answers and LLM retrieval), AI Brand Visibility (brand presence in AI models) and the SEO Content Editor writing assistant.

SEO API & Chrome Extension

Paid APIs provide keyword, backlink, traffic, readability and AI visibility data; the Chrome extension (v3.5.0) brings the most common checks into the browser.

Limitations

  • No historical trend tracking: Free tools run one-off checks and do not store history, so rank and authority trends cannot be monitored. Pair with continuous monitoring tools.
  • Limited data depth: Data is supplied by third parties such as SEMrush, so database size is far below paid platforms like Ahrefs.
  • Usage-based API pricing: Large-scale batch calling requires paid API plans; assess cost by call volume.
  • English-only interface: No Chinese support, adding a hurdle for Chinese users.

Use Cases

  • SEO beginners & content creators (★★★★★): Run keyword, rank and page checks at zero cost. See the SEO checklist.
  • Quick diagnostics & second-opinion checks (★★★★★): Use free tools to cross-verify audit results from other platforms.
  • Developers needing bulk data （★★★★☆）: Use the SEO API to fetch keyword, backlink and AI visibility data for automated workflows.
  • Enterprises needing long-term rank monitoring （★★★☆☆）: No trend tracking; pair with a dedicated rank tracker.

Pricing

Type Price Description
Free Tools $0 82 real-time SEO and AI tools, usable after registration
SEO API Usage-based Keyword, backlink, traffic, readability and AI visibility data interfaces
Chrome Extension $0 In-browser quick check tools

Note: API pricing and quotas per the official website; free personal use is the norm, while enterprise-scale bulk calls require paid API plans.

FAQ

  • Are all 82 tools really free? Most tools are free, and some require a free account; bulk data collection and automation require the paid API. See the official website for details; see also the SEO beginner's guide.

  • Can it replace paid SEO tools? It is great for quick free diagnostics and second opinions, but lacks historical trends and deep databases. For long-term monitoring compare SEO tool options.

  • What can the AI tools do? They check how well content fits AI answer retrieval and monitor brand visibility in AI models. See the AI search optimization guide.

  • Who should use the API? Developers and agencies that need bulk keyword, backlink and AI visibility data integrated into BI tools or automated workflows; see API integration basics for websites.