Surfer

Surfer is an on-page SEO tool built around a content editor. You enter a target keyword, it analyses pages that already rank for it, and then grades your draft on things like term usage, headings and length while you write. It also offers keyword research, content audits, AI-assisted drafting and tracking of how brands appear in AI search answers.

It is a fit for content marketers, SEO specialists and agencies who publish search-driven articles regularly and want a repeatable checklist. It integrates with Google Docs and WordPress, and a free browser extension shows keyword data alongside search results. Because its scores reflect what competing pages do, treat them as guidance rather than a guarantee of rankings.

There is no free plan, though Surfer offers several standalone free tools. Paid plans are tiered by usage and are cheaper when billed annually; Surfer’s help centre describes a 7-day trial that requires billing details up front. API access is reserved for the highest self-serve tier.