Semrush

The scale of the underlying dataset is the pitch: 28 billion keywords, 43 trillion backlinks, 808 million domain profiles and 142 geo databases. That index feeds everything else — keyword research, rank tracking, technical site audits, backlink analysis and competitor traffic estimates all draw on the same pool.

AI visibility alongside classic SEO

The newer half of the platform tracks whether LLMs mention and cite your brand. Semrush monitors 317M+ prompts, reports prompt-level visibility and AI market share against competitors, and publishes an AI Visibility Index of brand mention counts across platforms like ChatGPT. Semrush One bundles this with traditional search work.

Beyond search there are modules for content creation and scoring, local presence and Google Business Profile, Google and Meta ad research, digital PR pitching to LLM-trusted media, and social publishing with mention monitoring. An MCP server pipes live Semrush data into AI assistants, and there’s an API, App Center, integrations and an Enterprise tier sold via demo.