Semrush is one of the best-known SEO and digital marketing research suites, covering keyword research, site audits, rank tracking, backlink analysis, competitor research and content tools across a modular set of toolkits (SEO, AI Visibility, Traffic & Market, Local, Content, Social, Advertising and AI PR). Its three core plans, Pro, Guru and Business, scale by number of projects, keywords tracked and crawl limits.
Guru adds the Content Marketing Toolkit, historical data and multi-location tracking, making it the plan most agencies land on; Business adds API access, Share of Voice and the highest data limits for larger operations. Additional specialist toolkits can be added on top of a base SEO/AI Visibility plan, and extra user seats cost $45-$100 a month each depending on plan.
Semrush suits teams that need deep research data, competitive intelligence and content planning tools, where a person on the team (or a client-side team) will act on the findings. AgentixSEO is built for the opposite end of that workflow: it is the implementation layer that writes, deploys and keeps optimizing after research or an audit identifies what to do.