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Ahrefs vs Semrush
Ahrefs leads on backlink and content research; Semrush trades some of that depth for PPC, social and AI-visibility modules in one subscription.
Side by side
| Ahrefs | Semrush | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Ahrefs Pte. Ltd. | Semrush Inc. | ||||||||||||||||
| Pricing model | Subscription | Subscription | ||||||||||||||||
| Free tier | Yes | No | ||||||||||||||||
| Deployment | Cloud | Cloud | ||||||||||||||||
| Open source | No | No | ||||||||||||||||
| Best for | SEOs and content teams whose primary need is backlink and competitor content research. | Agencies and in-house marketing teams that need SEO, PPC, and content research in one subscription. | ||||||||||||||||
| Pricing | Monthly subscription tiers by tracked keywords, crawl credits, and history; a limited free Ahrefs Webmaster Tools version exists for verified site owners.
Prices read from the vendor's own page on September 21, 2026. Vendors change prices; check the source before you budget. | Tiered monthly subscription by tracked domains, daily keyword checks, and AI-prompt monitoring; billed monthly or annually at a discount.
Prices read from the vendor's own page on September 21, 2026. Vendors change prices; check the source before you budget. | ||||||||||||||||
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Verdict
Both run proprietary web-scale crawlers and compete on nearly every report type: keyword research, rank tracking, site audits, backlink indexes. The difference is what sits around that core. Ahrefs stays narrowly focused on SEO and is most often chosen for its backlink index and Content Explorer, used to study competitors' top-performing pages and link profiles. Semrush bundles PPC keyword planning, social media tracking and, on higher tiers, AI-search-prompt monitoring into the same login, which suits a team reporting across channels rather than SEO in isolation. Practitioners who have used both tend to agree the core keyword and rank-tracking data is close enough that the choice comes down to what else you need in the subscription.
Choose Ahrefs if
- Your main use case is backlink research and competitive content analysis.
- You want a free tier (Ahrefs Webmaster Tools) for verified site owners before committing to a paid plan.
- You'd rather pay for a narrower, SEO-only tool than a broader marketing suite.
Choose Semrush if
- You manage PPC and organic search together and want shared keyword data across both.
- You want AI-assistant visibility tracking included in the platform rather than a separate add-on purchase.
- Your team also needs lightweight social media tracking without a second subscription.
What they share
Both price by tracked domains, daily keyword-check volume and crawl credits rather than by user seat, and both now report AI-search visibility as an extension of their core keyword research and SERP tracking. Neither publishes a self-hosted option — both are cloud-only. For the wider category, see how to choose an SEO platform.
The honest caveat
Ahrefs' backlink index is widely regarded in the SEO community as the deepest of the two, but that reputation is based on practitioner consensus rather than a published, audited benchmark either vendor discloses — verify against your own link profile in a trial rather than taking either company's marketing at face value.
Last reviewed September 22, 2026