# Open-source alternatives to Semrush

> Open-source alternatives to Semrush that run locally, allow commercial use and need no paid API include Unlighthouse (site audit; MIT). OpenSEO covers all 5 Semrush jobs.

Semrush: Paid hosted SEO suite for keyword research, rank tracking, backlink analysis, site audits and competitor research. Pricing: Free plan (10 reports per day); SEO plan £113/month, or £95.07/month billed annually (UK prices as served) (checked 2026-10-15). Facts checked 2026-10-15.

## Projects

| Project | Jobs | Runs locally | Commercial use | Paid services | Hardware |
|---|---|---|---|---|---|
| [OpenSEO](https://repoquarry.dev/projects/openseo) | keyword-research, rank-tracking, backlink-analysis, site-audit, competitor-analysis | Self-hosted with Docker or on your own Cloudflare account; hosted version also offered | Yes, MIT code (SEO data is bought separately from DataForSEO) | A paid DataForSEO API key is required for all SEO data; OpenRouter key optional for AI prompt suggestions | Not documented |
| [Unlighthouse](https://repoquarry.dev/projects/unlighthouse) | site-audit | Yes, CLI runs on your own machine | Yes, MIT code | None required | Not documented; needs Chrome or a downloaded Chromium |
| [SEOnaut](https://repoquarry.dev/projects/seonaut) | site-audit | Self-hosted web app (Docker or compiled Go binary); hosted version also offered | Yes, MIT code | None required | Not documented |
| [SerpBear](https://repoquarry.dev/projects/serpbear) | rank-tracking, keyword-research | Self-hosted web app (Docker or Node.js) | Yes, MIT code | Needs a SERP scraping API (the working ones listed are paid) or your own proxy IPs; Google Ads and Search Console optional | Not documented |

## Common questions

### Is there a free, open-source alternative to Semrush?

Yes. SerpBear, Unlighthouse and SEOnaut are free to download and run on your own computer without paid API keys. Each covers only part of what Semrush does, so check which job you need.

### Can I do keyword research locally without a Semrush subscription?

Yes, with OpenSEO (MIT) and SerpBear (MIT). Check the hardware notes and licence conditions on each page before you start.

### Can I do rank tracking locally without a Semrush subscription?

Yes, with OpenSEO (MIT) and SerpBear (MIT). Check the hardware notes and licence conditions on each page before you start.

### Which Semrush alternatives can I use commercially?

Confirmed: OpenSEO, SEOnaut, SerpBear and Unlighthouse. This is not legal advice; read each licence.

### Does any open-source project replace all of Semrush?

OpenSEO covers every job we list for Semrush.

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Source: RepoQuarry (https://repoquarry.dev/alternatives/semrush). Data licence: CC BY 4.0. Quotes are from project documentation and belong to their authors.