# DOSarrest vs Gatekeeper: side-by-side comparison (2026)

[DOSarrest](https://cybersectools.com/tools/dosarrest) is a commercial [DDoS mitigation](https://cybersectools.com/categories/ddos-mitigation) solution by [DOSarrest](https://cybersectools.com/companies/dosarrest). [Gatekeeper](https://cybersectools.com/tools/gatekeeper) is a free [DDoS mitigation](https://cybersectools.com/categories/ddos-mitigation) solution. Features, integrations, deployment and the company behind each one, side by side.

## Side-by-side comparison

| | DOSarrest | Gatekeeper |
|---|---|---|
| Pricing model | Commercial | Free |
| Category | DDoS Mitigation | DDoS Mitigation |
| Verified | No | No |
| Deployment type | Cloud | On-Premises |
| Company size fit | SMB, Mid-Market, Enterprise | Mid-Market, Enterprise |
| GitHub stars | – | 1,591 |
| Last commit | – | Nov 2025 |
| Company | DOSarrest | – |
| Headquarters | – | – |

### Use cases and capabilities

| | DOSarrest | Gatekeeper |
|---|---|---|
| DDoS | Yes | Yes |
| Network Protection | Yes | Yes |
| Mitigation | Yes | Yes |
| Security as a Service | Yes | – |
| Open Source | – | Yes |
| Network Monitoring | – | Yes |
| Attack Detection | – | Yes |
| Traffic Filtering | – | Yes |

## Which one fits you

Based on what each listing shows: deployment, company size, price and open source.

- [DOSarrest](https://cybersectools.com/tools/dosarrest) fits if you want a cloud product and you are a small business.
- [Gatekeeper](https://cybersectools.com/tools/gatekeeper) fits if you need to run it on your own servers, you need a free product and you want an open-source product.

## DOSarrest vs Gatekeeper FAQ

Common questions when comparing DOSarrest vs Gatekeeper for DDoS mitigation.

### What is the difference between DOSarrest and Gatekeeper?

**DOSarrest**: DDoS protection firm acquired by Link11 GmbH in Jan 2021. Built by DOSarrest.

**Gatekeeper**: An open source DDoS protection system that uses distributed algorithms to defend against multi-vector attacks and scale to handle varying bandwidth requirements for network operators and service providers.

The table above shows where their features, integrations, deployment and company size fit differ.

### Who makes DOSarrest and Gatekeeper?

**DOSarrest** is made by DOSarrest. **Gatekeeper** is open-source with 1,591 GitHub stars. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is DOSarrest a good alternative to Gatekeeper?

Often, yes. DOSarrest and Gatekeeper are both DDoS Mitigation products, and both cover DDoS, Network Protection, Mitigation. Key differences: DOSarrest is Commercial while Gatekeeper is Free, Gatekeeper is open-source. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [DOSarrest vs SkyCloud Anti-DDoS](https://cybersectools.com/compare/dosarrest-vs-skycloud-anti-ddos)
- [DOSarrest vs Blindspot Intelligent Network & Infra Protection](https://cybersectools.com/compare/blindspot-intelligent-network-and-infra-protection-vs-dosarrest)
- [DOSarrest vs Akamai Prolexic](https://cybersectools.com/compare/akamai-prolexic-vs-dosarrest)
- [Gatekeeper vs SkyCloud Anti-DDoS](https://cybersectools.com/compare/gatekeeper-vs-skycloud-anti-ddos)
- [Gatekeeper vs Blindspot Intelligent Network & Infra Protection](https://cybersectools.com/compare/blindspot-intelligent-network-and-infra-protection-vs-gatekeeper)
- [Gatekeeper vs Akamai Prolexic](https://cybersectools.com/compare/akamai-prolexic-vs-gatekeeper)

## Alternatives to each

- [See all DOSarrest alternatives](https://cybersectools.com/alternatives/dosarrest)
- [See all Gatekeeper alternatives](https://cybersectools.com/alternatives/gatekeeper)

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Source: https://cybersectools.com/compare/gatekeeper-vs-dosarrest

For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/dosarrest.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md.

More on DOSarrest and Gatekeeper: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=compare-md