open-seo is an MIT open-source Semrush and Ahrefs alternative at 19,150 stars, seven months old
GitHub Trending·medium signal
every-app/open-seo was created 2026-02-27 and has taken 19,150 stars and 2,462 forks positioning itself directly against two subscription SEO products, and it gained 183 stars today on the TypeScript board. It carries 176 open issues and was pushed this morning. The pattern to watch is that the open-source-alternative-to-a-SaaS play is now landing on non-AI product categories, with the AI part being how the data gets summarized rather than what the tool is.