Ahrefs
SEO toolset built around a large backlink index, with keyword research, site audits and rank tracking.
- Free plan or free version
- Developer API
- Chrome extension
About Semrush
SEO and marketing suite with keyword research, backlink data, site audits, rank tracking and competitor analysis.
Semrush is a web-based marketing suite that started with search data and now covers most day-to-day SEO jobs in one account. The core tools are a keyword database with search volumes and difficulty estimates, a backlink index, a site audit crawler, position tracking and domain reports that show which keywords and pages bring a competitor traffic.
Agencies and in-house teams use it to plan content from keyword gaps, monitor rankings for a set of target terms, and check a site for crawl errors after a release. It also has local SEO features and AI writing features for drafting and rewriting copy.
A free account gives a small number of searches a day. Data in any third-party tool is an estimate, so compare its numbers with your own Search Console data before you base a forecast on them.
Details
Free plan or free version
YesDeveloper API
YesWrites or rewrites content with AI
YesLocal SEO features
Yes
Not enough info yet on wordPress plugin, chrome extension. Check the tool's own site.
Listing written by SEO Opinion, checked 2026-11-03. Report a correction or request removal. Back to all-in-one seo suites.