# SiteOne Crawler review (2026): is it any good? > Free open-source site crawler and audit report, as an app or CLI Checked Oct 23, 2026 ยท graded Oct 23, 2026 by ToolGPA. SiteOne Crawler is a free, MIT-licensed website crawler made by the web development company SiteOne and offered as a desktop app and as a single command-line binary. A crawl produces an HTML audit report with a 0 to 10 quality score across security, performance, SEO, accessibility and best practices. The same tool can mirror a site for offline use, convert it to Markdown, generate sitemaps, run load tests and fail CI builds on set thresholds. - **Category:** Technical SEO & Site Audits - **Made by:** SiteOne - **Website:** https://crawler.siteone.io - **Runs on:** macOS, Windows, Linux - **Who should skip it:** Skip it if you want crawls run in the cloud, as it runs only on your own computer or server. - **Facts last checked:** Oct 23, 2026 ## Pricing As of Oct 23, 2026, SiteOne Crawler is free to use. - **Pricing model:** Free - **Free plan:** Free and open source under the MIT license: the desktop app, the command-line tool and online sharing of HTML reports. - **Free trial:** None listed. | Plan | Price | What you get | | --- | --- | --- | | Free | $0 | The desktop app and command-line crawler, run on your own computer, with free hosted links for sharing reports. | Read from https://crawler.siteone.io/introduction/faq/ on Oct 23, 2026. Prices change, so confirm with SiteOne Crawler before buying. ## Key features - **Audit report and quality score:** Each crawl ends in a self-contained HTML report with a 0 to 10 score, weighted 25% security and 20% each for performance, SEO and accessibility. - **Site-wide checks:** Covers SEO and OpenGraph tags, headings, redirects and 404s, security headers, SSL/TLS certificates, caching headers, content types and DNS. - **JavaScript rendering and screenshots:** An optional browser mode renders each page in Chromium so single-page apps are crawled, and can capture every page as an image, GIF or MP4. - **CI/CD quality gate:** The --ci option fails a build when scores fall below set thresholds, with JUnit XML output and annotations for GitHub Actions. - **Offline clone and Markdown export:** Saves a static mirror of a whole site, assets included, or converts its pages to Markdown and an llms.txt file. - **Optional AI assistant:** With your own key for OpenAI, Anthropic or Gemini, or a local model, adds per-page SEO rewrites, spelling checks and a site summary. ## Good for - Developers and QA engineers auditing a whole site at no cost - Adding a site quality check to a CI pipeline - Archiving a site as an offline copy or Markdown for AI tools ## Worth knowing - It runs on your own computer or server; there is no hosted crawler, and emailed reports need your own SMTP server. - The AI assistant uses your own API key or local model, so any LLM charges come from that provider. - Pages built by JavaScript are crawled only in the optional browser mode, which renders them in Chromium. - The desktop app is downloaded from the project's links; its page says it is not yet in the Mac App Store or Microsoft Store. ## ToolGPA grades **GPA: 3.0 out of 4**, graded Oct 23, 2026. SiteOne Crawler is a free, MIT-licensed crawler for Mac, Windows and Linux that ends each crawl with an HTML report scoring security, performance, SEO and accessibility, and it can also mirror a site, export Markdown and fail CI builds. It only runs on your own machine, though: there's no hosted crawler, JavaScript sites need the optional browser mode, and the AI features bill through your own API key. - **Value for money: A.** Free and open source under MIT: the desktop app, the command-line binary and hosted links for sharing reports. You download it and run it on your own computer, with no paid tier on record. - **Free plan and trial: A.** Free outright, with every feature included. The only costs are your own: an SMTP server if you want reports emailed, and an LLM provider's charges if you switch the AI assistant on. - **Features: C.** Site-wide checks of SEO and OpenGraph tags, headings, redirects and 404s, security headers, SSL, caching and DNS, with a 0 to 10 score, CI gates and an offline mirror. The gaps: no hosted crawler, and no Search Console or analytics data on record. - **Ease of use: B.** No rating on record. The desktop app is a download you open and point at a site, and the CLI is a single binary with no runtime to install. JavaScript rendering is an extra mode you switch on. - **Platforms and integrations: C.** Mac, Windows and Linux, with GitHub Actions, GitLab CI, Jenkins and your choice of OpenAI, Anthropic, Gemini or a local model. A program for computers only: no web or phone version. These are ToolGPA's own grades. Graded from this listing, whose facts were read from SiteOne's own pages on 23 October 2026. Not based on using the product, and shorter than our full reviews. ## Where it stands among technical SEO tools - SiteOne Crawler's GPA of 3.0 is higher than 73 of the 83 other technical SEO tools we grade, and level with 7. - It stands best on free plan and trial (A, above 62 of 83) and worst on platforms and integrations (C, above 3). - SiteOne Crawler has no paid plan. - On features, ease of use and platforms it scores 2.3 out of 4. Nothing scores higher for less, though at least one tool matches that score at a lower price. The category's chart of price against score: https://toolgpa.com/charts/technical-seo ## Keep it, or make your own? **Keep it.** SiteOne Crawler is free, so making your own would save you nothing. And it is not the kind of software a weekend replaces. It is one of the better ones too: its GPA of 3.0 is higher than 73 of the 83 other technical SEO tools we grade. - You could not: A crawler that checks every page of a site. - You could not: Apps for macOS, Windows and Linux that stay in step with each other. - You could not: It plugs into other products, GitHub Actions, GitLab CI and Jenkins among them. - You could not: AI features, unless you pay a model provider for each request yourself. A judgement by ToolGPA from this listing, by rules that are the same for every tool. Nothing was built to test it. ## Works with GitHub Actions, GitLab CI, Jenkins, OpenAI, Anthropic, Google Gemini, Ollama, LM Studio **Tags:** Site audit, Open source, AI features ## Alternatives - [Screaming Frog SEO Spider](https://toolgpa.com/tools/screaming-frog): Desktop website crawler for technical SEO audits. [Compare](https://toolgpa.com/compare/screaming-frog-vs-siteone-crawler) - [Sitebulb](https://toolgpa.com/tools/sitebulb): Website auditing crawler for Windows and Mac, with a cloud edition. [Compare](https://toolgpa.com/compare/sitebulb-vs-siteone-crawler) - [Beam Us Up](https://toolgpa.com/tools/beam-us-up): Free desktop SEO crawler for Windows, Mac and Linux. [Compare](https://toolgpa.com/compare/beam-us-up-vs-siteone-crawler) - [Visual SEO Studio](https://toolgpa.com/tools/visual-seo-studio): Desktop SEO crawler for Windows and Mac with XML sitemap tools. [Compare](https://toolgpa.com/compare/siteone-crawler-vs-visual-seo-studio) - [Unlighthouse](https://toolgpa.com/tools/unlighthouse): Free open-source tool that runs Lighthouse on every page of a site. [Compare](https://toolgpa.com/compare/siteone-crawler-vs-unlighthouse) ## Sources The prices, plans, platforms and features above were read from these pages on Oct 23, 2026: - https://crawler.siteone.io/introduction/faq/ - https://crawler.siteone.io/ - https://crawler.siteone.io/features/audit-report/ - https://crawler.siteone.io/installation-and-requirements/desktop-application/ - https://crawler.siteone.io/features/mailer/ - https://crawler.siteone.io/ai-assistant/ai-assistant/ - https://crawler.siteone.io/quality/ci-cd-integration/ - https://crawler.siteone.io/introduction/motivation/ - https://github.com/janreges/siteone-crawler Page: https://toolgpa.com/tools/siteone-crawler Listed by ToolGPA (toolgpa.com).