Ahrefs's free plan provides lifetime access to six core tools including Site Explorer, Site Audit, Website Analytics, Social Media Manager, AI Content Helper, and the Ahrefs SEO Toolbar, but with significant limitations. G2 reviewers note the free tier is useful for basic site auditing and backlink monitoring on verified properties. Ahrefs's paid plans starting at $29 per month unlock Keywords Explorer, rank tracking, project slots, historical data, and higher credit allowances. Higher tiers like Standard at $249 per month add Content Explorer, advanced reports, AI keyword tools, and extended history. G2 users frequently cite crawl budget limits and restricted credits on lower paid tiers as the primary frustrations driving upgrades.