Semrush is a broad SEO and digital marketing platform covering keyword research, technical site audits, rank tracking, and backlink analysis, and has recently added AI-search visibility tracking.
It solves SEO research and ongoing monitoring: finding which keywords to target, auditing technical issues, and watching where competitors rank, backed by a database of 28 billion-plus keywords. That breadth is the differentiator against a narrower tool like Surfer SEO, which only optimizes content that is already being written.
Agencies and marketing teams running ongoing SEO and competitor tracking. Overkill for someone who only needs to optimize a single blog post.
There is a genuinely free account, separate from the paid trial, capped at 10 searches a day across tools, a 100-page site audit, and 10 tracked keywords: enough to explore but not to run a real campaign. The 7-day trial of paid plans requires a credit card.
Comprehensive SEO and digital marketing platform.