| Price from | Free | Free |
| Free plan | Yes | Yes |
| Free trial | — | — |
| Open source | — | — |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| Self-hosted | — | Yes |
| Plans published | 1 | 2 |
| Spec score · SEO Audit Software | 8.2 (#10) | 8.2 (#12) |
| Spec score · Website Audit software | 8.2 (#7) | 8.3 (#6) |
| Spec score · SEO Crawler Software | 8.2 (#12) | 8.1 (#14) |
| Spec score · SEO tools | 7.7 (#134) | 7.7 (#137) |
| Free plan | Yes | Yes |
| Integrations | The maker's comparison page lists Google Analytics, Search Console, PageSpeed Insights, and other integrations as “Soon.” | Listed integrations include Google Search Console, GA4, Google Sheets, BigQuery, PageSpeed Insights, Ahrefs, Moz, Semrush, Majestic, OpenAI, Anthropic, and Ollama. |
| JavaScript rendering | Crab can render JavaScript sites with headless Chrome, including React, Vue, and other single-page applications. | JavaScript rendering uses bundled Chromium via Playwright and supports screenshots, LCP candidate detection, and mobile usability audits. |
| Product | Crab is a desktop SEO crawler for auditing websites. | FreeCrawl is an open-source desktop SEO crawler that runs locally and offers unlimited URL crawling. |
| Site audit | Yes | Yes |
| Support | The homepage directs users with questions to GitHub. | The site directs users to GitHub Issues for bugs and feature requests and says private email support replies within 48 hours. |
