Ahrefs and Semrush are the two heavyweight SEO platforms. Both are excellent; the right pick depends on whether you prioritize backlink data and a clean workflow (Ahrefs) or the broadest all-in-one toolkit and keyword data (Semrush).
Full reviews: Ahrefs review · Semrush review
Quick verdict
- Choose Ahrefs for the best backlink index, a faster learning curve, and a cleaner interface.
- Choose Semrush for the most complete all-in-one suite — keyword research, PPC, content, and competitor data in one place.
Head to head
| Ahrefs | Semrush | |
|---|---|---|
| Rating | 4.5/5 | 4.5/5 |
| Best for | Backlink analysis & content research | All-in-one SEO + PPC |
| Free option | Webmaster Tools (own site) | Limited free account |
| Entry price | Starter $29/mo | SEO $139/mo ($117.33 annual) |
| Backlink data | Best-in-class | Strong |
| Keyword data | Excellent | Best-in-class |
| Toolkit breadth | Focused on SEO | SEO + PPC + content + social |
| Seats per plan | Varies by tier | 1 user by default |
When Ahrefs wins
Ahrefs has the most trusted backlink index and a famously clean, fast interface. If link building and competitor backlink analysis are central to your work — and you want a tool the whole team can pick up quickly — Ahrefs is the better daily driver. Its new $29 Starter plan also lowers the entry barrier.
When Semrush wins
Semrush does more. Beyond core SEO it covers PPC research, content optimization, local SEO, and social tools, with arguably the deepest keyword and competitor database. For agencies that want one platform to cover the entire search marketing workflow, Semrush is hard to beat — though it is pricier and steeper to learn.
Bottom line
For backlinks and simplicity, pick Ahrefs. For the widest all-in-one toolkit, pick Semrush. Many serious teams run both. Read the full Ahrefs review and Semrush review.
Frequently asked questions
Which is cheaper, Ahrefs or Semrush?
Ahrefs’ Starter plan starts at $29/mo, much cheaper than Semrush’s SEO plan at $139/mo.
Which has better backlink data?
Ahrefs has the best-in-class backlink index, while Semrush’s backlink data is strong but rated a step behind.
Which has better keyword data?
Semrush has best-in-class keyword data, while Ahrefs’ keyword data is rated excellent, a close second.
Which should I pick for an all-in-one marketing toolkit?
Semrush is the broader all-in-one suite covering SEO, PPC, content, and social tools, while Ahrefs stays focused on SEO with a cleaner, faster interface.