Better Search Lab is a free, self-hosted alternative to Ahrefs, Semrush and SE Ranking. Rank tracking, keyword and competitor research, site audits, backlinks, a weekly ranked list of what to do next, and AI-visibility scans of Perplexity, ChatGPT and Gemini. AGPL-3.0, no seats or credits: you pay only DataForSEO's pay-as-you-go data, about $0.37 to map a 150-keyword site. One command to install.