OpenSEO
An open-source SEO toolkit that does keyword research, rank tracking, and site audits — the same job as Semrush or Ahrefs — that you can run yourself for a fraction of the cost.
🔗 Visit OpenSEO
Description
Semrush and Ahrefs are the standard tools for keyword research, rank tracking, and competitor analysis, but they typically cost well over $100/month. OpenSEO is an open-source project that covers the same core jobs — keyword research, rank tracking, competitor insights, backlink analysis, and site audits — plus AI-visibility monitoring, either self-hosted for free or through a low-cost hosted version.
It's TypeScript-based, MIT-licensed, and includes an MCP server plus agent skills so AI agents can pull SEO data or run workflows directly. Self-hosted, it's free but requires your own DataForSEO API key (the actual data source behind the numbers); the hosted version costs $10/month plus DataForSEO usage costs with a 28% markup. It deploys via Docker for local use or Cloudflare for internet-facing deployments, has around 9.3k GitHub stars, 1.1k forks, and 402 commits with 26 open issues at time of writing.
💬 Our review
The short version: if your SEO needs are real but your budget doesn't stretch to a $100+/month Semrush or Ahrefs subscription, OpenSEO covers the same core workflows for a fraction of the price, provided you're willing to either self-host or accept a modest markup on a hosted plan.
Compared to Semrush or Ahrefs (mature, huge proprietary databases, polished UI, but expensive), OpenSEO is younger and its data ultimately comes from the same third-party source (DataForSEO) rather than its own proprietary crawl, so data freshness and coverage will track whatever DataForSEO provides rather than a competitor's in-house index. The MCP server and agent-skills integration is a genuinely modern touch that most incumbent SEO tools don't offer yet, useful if you're already running AI agents for content or marketing work. For a freelancer, small agency, or bootstrapped SaaS watching every dollar, the cost savings alone likely justify the self-hosting effort; for an enterprise team that needs guaranteed data depth and support, the established paid tools still have the edge.
💰 Pricing
📊 Global score
🤖 AI-enriched data
Gratuit en self-hosted (nécessite une clé API DataForSEO à vos frais) ; version hébergée 10$/mois + coûts DataForSEO (+28%)
Pros
Couvre l'essentiel : mots-clés, positions, backlinks, audits de site
Serveur MCP + agent skills pour intégration IA
Bien moins cher que Semrush/Ahrefs
Open-source, auto-hébergeable gratuitement
Cons
Données finalement issues de DataForSEO, pas d'index propriétaire
Nécessite une clé API DataForSEO payante en self-hosted
Moins mature et moins profond que les leaders établis