# Majestic API vs Similarweb (slim)

> Similarweb scores 46 (D) to Majestic's 33.4 (F) for keyword data. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/majestic-vs-similarweb.md (~2,350 tokens) · this version ~630 tokens · JSON https://www.anchorterminal.com/compare/majestic-vs-similarweb.json · canonical https://www.anchorterminal.com/compare/majestic-vs-similarweb
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

Similarweb scores 46 (D) on agent readiness against Majestic API's 33.4 (F), and leads in 6 of 7 scored categories. Majestic API leads on payments & pricing. Both do keyword data.

- Majestic API: F 33.4, rank #937 of 950 · https://www.anchorterminal.com/tools/majestic.min.md
- Similarweb: D 46, rank #858 of 950 · https://www.anchorterminal.com/tools/similarweb.min.md
- Majestic API, good for An agent that needs backlink, referring domain, anchor text and Trust Flow data in volume for an owner who already pays for the API plan. Ahead on Payments & pricing, 15 against 5.
- 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 Reliability, 35 against 17; Schema & documentation, 63 against 44; Agent ergonomics, 67 against 54; Security & auth, 52 against 32; Maintenance & community, 33 against 22; Transparency & trust, 60 against 53.

| Category | Majestic API | Similarweb |
| --- | --- | --- |
| Reliability (16%) | 17 | 35 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 44 | 63 |
| Agent ergonomics (13%) | 54 | 67 |
| Security & auth (14%) | 32 | 52 |
| Payments & pricing (10%) | 15 | 5 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 22 | 33 |
| Transparency & trust (7%) | 53 | 60 |

| Fact (where they differ) | Majestic API | Similarweb |
| --- | --- | --- |
| Vendor | Majestic (Majestic-12 Limited) | Similarweb Ltd. |
| Hosted endpoint | `https://api.majestic.com` | `https://api.similarweb.com` |
| Auth | API key | OAuth or key |
| Licence | Proprietary service under Majestic's Terms and Conditions. The Python 3 connector on GitHub carries a BSD-style licence file | Proprietary service under Similarweb's terms of use |
| Last release | none | 2026-09-24 |
| Terms last updated | no date given | 2025-03-19 |
| Privacy policy last updated | 2026-04-01 | 2026-06-30 |
| Terms restrict benchmarking | not found in the text | yes |
| Terms or service can change without notice | yes | not found in the text |
| Popularity | 3 stars | none |