# Ahrefs vs Similarweb (slim)

> Ahrefs scores 49.8 (D) on agent readiness against Similarweb's 46 (D), and leads in 4 of 7 scored categories. Similarweb leads on security & auth. Both do seo keywords. Category scores, facts, verdicts and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/ahrefs-vs-similarweb.md (~2,000 tokens) · this version ~630 tokens · JSON https://www.anchorterminal.com/compare/ahrefs-vs-similarweb.json · canonical https://www.anchorterminal.com/compare/ahrefs-vs-similarweb
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-08

Ahrefs scores 49.8 (D) on agent readiness against Similarweb's 46 (D), and leads in 4 of 7 scored categories. Similarweb leads on security & auth. Both do seo keywords.

- Ahrefs: D 49.8, rank #526 of 629 · https://www.anchorterminal.com/tools/ahrefs.min.md
- Similarweb: D 46, rank #566 of 629 · https://www.anchorterminal.com/tools/similarweb.min.md
- Ahrefs, good for An agent doing backlink, keyword, SERP, rank and traffic research for a team that already pays for Ahrefs, and reading that team's Rank Tracker, Site Audit, Web Analytics and Search Console data. Ahead on Schema & documentation, 85 against 63; Payments & pricing, 23 against 5; Maintenance & community, 68 against 33; Transparency & trust, 65 against 60.
- Similarweb, good for Traffic and engagement estimates, traffic channel mix and keyword click data for domains an agent doesn't own, with app, company and retail data on the same key. Ahead on Security & auth, 52 against 45. Also No incidents deducted, where Ahrefs loses 3 points for them.

| Category | Ahrefs | Similarweb |
| --- | --- | --- |
| Reliability (16%) | 32 | 35 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 85 | 63 |
| Agent ergonomics (13%) | 63 | 67 |
| Security & auth (14%) | 45 | 52 |
| Payments & pricing (10%) | 23 | 5 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 68 | 33 |
| Transparency & trust (7%) | 65 | 60 |

| Fact (where they differ) | Ahrefs | Similarweb |
| --- | --- | --- |
| Vendor | Ahrefs Pte. Ltd. | Similarweb Ltd. |
| Hosted endpoint | `https://api.ahrefs.com/v3` | `https://api.similarweb.com` |
| Transports | HTTP, Streamable HTTP | HTTP |
| Licence | Proprietary service under Ahrefs' terms of service. The Python SDK on GitHub is MIT | Proprietary service under Similarweb's terms of use |
| Last release | 2026-10-01 | 2026-09-24 |
| Terms last updated | 2026-09-14 | 2025-03-19 |
| Privacy policy last updated | 2026-08-04 | 2026-06-30 |
| Customer content may train models | yes | not found in the text |
| Terms or service can change without notice | yes | not found in the text |
| Arbitration or class-action waiver | yes | not found in the text |