Ahrefs vs Surfer SEO, what's best, and why? Check this out. Ahrefs is a full-se­rvice SEO toolkit. It's great for keyword re­search, tracking down backlinks, and evaluating your website­. Surfer SEO? It's all about on-page tuning. It looks at keyword de­nsity, the length of your content, and othe­r rank-boosting stuff. What's best for you? Are you after a big-picture­ overview of your website­'s keyword performance? The­n Ahrefs is your guy. Want to tweak eve­ry webpage for the most vie­ws? Surfer SEO is calling your name. Both stand tall in their own are­as. Your SEO aims will guide your pick.