Open SEO Crawler vs Rank Math SEO
Open SEO Crawler
github.com
Rank Math SEO
rankmath.comSide by side
| Figure | Open SEO Crawler | Rank Math SEO |
|---|---|---|
| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | — | Yes |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| API | — | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 1 | 9 |
| Spec score · SEO tools | 7.8 (#119) | 9.3 (#2) |
| Competitor research | Yes | Yes |
| Free plan | Yes | Yes |
| Privacy | The crawler runs locally with no accounts, telemetry, or API calls; it contacts the target site and checks GitHub for updates when requested. | The privacy policy page is available, but the opened page content did not state a security certification or compliance claim. |
| Site audit | Yes | Yes |
| Support | The maintainer directs bug reports to GitHub Issues and other inquiries to LinkedIn. | Rank Math says it provides support through email and tickets, does not offer live chat or phone support, and aims to respond to tickets within 24 hours. |
Plans
Rank Math SEO
- FreeFree
- FreeFree
- PRO€7.99 a year
- Rank Math + WP Rocket€11.99 a year
- Business€24.99 a year
- Agency€54.99 a year
- PRO$107.88 a year
- Business$335.88 a year
- Agency$779.88 a year
In their own words
Open SEO Crawler
Open SEO Crawler is a free, self-hosted, open-source tool for auditing websites for technical SEO issues. It checks titles, meta descriptions, H1s, canonicals, structured data, redirects, HTTP errors, indexability, hreflang, mobile viewports, mixed content, images and security headers. It detects numerous CMS platforms, including Shopify, WordPress, Webflow, Wix, Squarespace, Kajabi, Ghost, Drupal, HubSpot and Joomla, then applies crawl recommendations. Optional Playwright rendering supports JavaScript-heavy sites, while compare mode identifies content absent from raw HTML.
Bulk reports can be exported to XLSX, and sitemap export is available. Default settings allow 1,500 pages, five workers, a 0.4-second per-host delay and depth 10; the page cap can be changed to unlimited. The crawler runs locally without accounts, telemetry or API calls, though it contacts target sites and checks GitHub for updates when requested. Installers are documented for Linux, macOS 11 or newer, and Windows 10/11. The project uses the MIT license.
Rank Math SEO
Rank Math SEO is a WordPress plugin for search optimization, with content suggestions, indexability controls, structured data, and performance tracking. It includes keyword research, rank tracking, site audits, and competitor research. Its built-in analysis checks 30 SEO factors, and users can enable and configure more than 15 modules. Structured data support covers more than 20 Schema types, including FAQ and HowTo. A Google Search Console integration displays keyword performance and click-through rates in WordPress admin, and the plugin works with Gutenberg and Classic Editors. Content AI offers more than 40 tools and can generate SEO-oriented content within WordPress; AI Link Genius suggests internal links and can identify orphan pages and broken links. Rank Math AI tracks brand mentions and visibility across ChatGPT and Gemini, with additional platforms described as coming soon. The Free plan is listed at free, and a free trial is available. PRO includes 500 tracked keywords and unlimited personal websites, while Business and Agency list 100 and 500 client websites, respectively.