OpenSEO: The Free, Open-Source Alternative to Semrush and Ahrefs

Are you tired of paying hundreds of dollars a month for bloated SEO suites? OpenSEO is a free, open-source SEO tool that gives you the core workflows you actually need — keyword research, rank tracking, competitor insights, backlinks and site audits — without the subscription.

What makes OpenSEO stand out

OpenSEO is an SEO tool for the people. If Semrush or Ahrefs are too expensive or too bloated, OpenSEO is a pay-as-you-go alternative you actually control:

• Keyword research: Find the keywords that matter for your site.
• Rank tracking: Track how your pages rank over time.
• Competitor insights: See what your competitors are doing.
• Backlinks: Monitor your link profile.
• Site audits: Find and fix technical SEO issues.
• AI visibility: Track how you appear in AI answers.

Built for you and your AI agent

OpenSEO connects with any AI agent like Claude Code, OpenClaw or Hermes. It has pre-built skills and an MCP server, so your agent can use your SEO data directly. No subscriptions — bring your own DataForSEO API key and pay only for what you use.

Free, open source, and self-hostable

OpenSEO is open source with 17,000+ GitHub stars. You can use the hosted version for free, or fork it and build your own custom SEO tool.

Best for

SEO professionals, marketers and site owners who want a modern, simple SEO tool without the bloated complexity and high cost of Semrush or Ahrefs.