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Ahrefs

Free tier

AI marketing platform powered by big data — dominate search, AI, and beyond

Free tier available·All audiences·Powered by Anthropic (Claude), Google (Gemini), others·API available
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Key strengths

World's #1 SEO crawler with industry-leading backlink and keyword databasesAI agent (Agent A) with unrestricted access to all Ahrefs dataComprehensive all-in-one platform: SEO, content, PPC, brand, social, and localAI search visibility tracking across LLMs (Brand Radar, Custom Prompts)Enterprise-grade infrastructure with 100+ API endpoints and ISO27001 certification
Free tier + paid plans
Singapore, Singapore
Founded 2010
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Ahrefs is built on in-house big data infrastructure — including the world's #1 SEO crawler (per Cloudflare Radar) and a TOP500-ranked supercomputer — that powers custom LLMs and continuously expanding databases. The platform exposes 100+ flexible API endpoints for developers to build custom dashboards, automate reporting pipelines, and integrate real-time Ahrefs data into internal tools. Its AI agent, Agent A, provides unrestricted programmatic access to all Ahrefs data and supports model switching between Claude, Gemini, and others via an MCP (Model Context Protocol) integration. Ahrefs also integrates with Google Search Console, Data Studio, ChatGPT, Claude, and Microsoft Copilot, making it embeddable into existing marketing and analytics stacks.