# Fortra BeSTORM vs PortSwigger: side-by-side comparison (2026)

[Fortra BeSTORM](https://cybersectools.com/tools/fortra-bestorm) is a commercial [dynamic application security testing](https://cybersectools.com/categories/dast) solution by [Fortra](https://cybersectools.com/companies/fortra). [PortSwigger](https://cybersectools.com/tools/portswigger) is a free [dynamic application security testing](https://cybersectools.com/categories/dast) solution by [PortSwigger Ltd](https://cybersectools.com/companies/portswigger-ltd). Features, integrations, deployment and the company behind each one, side by side.

Need the answer fast? [Best DAST Solutions for Business](https://cybersectools.com/shortlists/best-dast-solutions) picks PortSwigger Burp Suite DAST, Invicti DAST, Rapid7 InsightAppSec and 4 more.

## Side-by-side comparison

| | Fortra BeSTORM | PortSwigger |
|---|---|---|
| Pricing model | Commercial | Free |
| Category | Dynamic Application Security Testing | Dynamic Application Security Testing |
| Verified | Verified | No |
| Deployment type | Hybrid | Cloud |
| Company size fit | Mid-Market, Enterprise | Startup, SMB, Mid-Market, Enterprise |
| Company | Fortra | PortSwigger Ltd. |
| Headquarters | – | – |

### Use cases and capabilities

| | Fortra BeSTORM | PortSwigger |
|---|---|---|
| DAST | Yes | – |
| Fuzzing | Yes | – |
| Black Box Testing | Yes | – |
| Protocol Analysis | Yes | – |
| Critical Infrastructure | Yes | – |
| Bug Bounty | – | Yes |
| Web Security | – | Yes |
| App Security | – | Yes |

### Core features

**Fortra BeSTORM**

- Black box fuzzing without source code access
- Automated malformed input generation and injection
- Protocol and API security testing
- Vulnerability detection including buffer overflows and format string errors
- Support for a wide range of protocols and application interfaces
- Pre-release application security validation

**PortSwigger**

No features listed.

## Which one fits you

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

- [Fortra BeSTORM](https://cybersectools.com/tools/fortra-bestorm) fits if you need both cloud and on-premises options.
- [PortSwigger](https://cybersectools.com/tools/portswigger) fits if you want a cloud product, you are a startup or a small business and you need a free product.

## Fortra BeSTORM vs PortSwigger FAQ

Common questions when comparing Fortra BeSTORM vs PortSwigger for dynamic application security testing.

### What is the difference between Fortra BeSTORM and PortSwigger?

**Fortra BeSTORM**: Black box fuzzer and DAST product for application security testing. Built by Fortra. Core capabilities include Black box fuzzing without source code access, Automated malformed input generation and injection, Protocol and API security testing.

**PortSwigger**: A comprehensive toolkit for web application security testing, offering a range of products and solutions for identifying vulnerabilities and improving security posture. Built by PortSwigger Ltd.

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

### Who makes Fortra BeSTORM and PortSwigger?

**Fortra BeSTORM** is made by Fortra. **PortSwigger** is made by PortSwigger Ltd. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is Fortra BeSTORM a good alternative to PortSwigger?

Often, yes. Fortra BeSTORM and PortSwigger are both Dynamic Application Security Testing products. Key differences: Fortra BeSTORM is Commercial while PortSwigger is Free. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [Fortra BeSTORM vs Rapid7 InsightAppSec](https://cybersectools.com/compare/fortra-bestorm-vs-rapid7-insightappsec)
- [Fortra BeSTORM vs DerScanner Dynamic Application Security Testing (DAST)](https://cybersectools.com/compare/derscanner-dynamic-application-security-testing-dast-vs-fortra-bestorm)
- [Fortra BeSTORM vs Greenbone Web App Scanning](https://cybersectools.com/compare/fortra-bestorm-vs-greenbone-web-app-scanning)
- [PortSwigger vs Rapid7 InsightAppSec](https://cybersectools.com/compare/portswigger-vs-rapid7-insightappsec)
- [PortSwigger vs DerScanner Dynamic Application Security Testing (DAST)](https://cybersectools.com/compare/derscanner-dynamic-application-security-testing-dast-vs-portswigger)
- [PortSwigger vs Greenbone Web App Scanning](https://cybersectools.com/compare/greenbone-web-app-scanning-vs-portswigger)

## Alternatives to each

- [See all Fortra BeSTORM alternatives](https://cybersectools.com/alternatives/fortra-bestorm)
- [See all PortSwigger alternatives](https://cybersectools.com/alternatives/portswigger)

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Source: https://cybersectools.com/compare/fortra-bestorm-vs-portswigger

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

More on Fortra BeSTORM and PortSwigger: 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