# PortSwigger vs Start Left® Security DAST: side-by-side comparison (2026)

[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). [Start Left® Security DAST](https://cybersectools.com/tools/start-leftr-security-dast) is a commercial [dynamic application security testing](https://cybersectools.com/categories/dast) solution by [Start Left® Security](https://cybersectools.com/companies/start-leftr-security). 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

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

### Use cases and capabilities

| | PortSwigger | Start Left® Security DAST |
|---|---|---|
| Bug Bounty | Yes | – |
| Web Security | Yes | – |
| App Security | Yes | Yes |
| DAST | – | Yes |
| CI/CD | – | Yes |
| DevSecOps | – | Yes |
| Continuous Testing | – | Yes |
| Vulnerability Prioritization | – | Yes |

### Core features

**PortSwigger**

No features listed.

**Start Left® Security DAST**

4 features listed. Sign in on the page to see them.

## Which one fits you

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

- [PortSwigger](https://cybersectools.com/tools/portswigger) fits if you are a startup and you need a free product.

## PortSwigger vs Start Left® Security DAST FAQ

Common questions when comparing PortSwigger vs Start Left® Security DAST for dynamic application security testing.

### What is the difference between PortSwigger and Start Left® Security DAST?

**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.

**Start Left® Security DAST**: DAST tool that tests running apps for runtime vulnerabilities via attack simulation. Built by Start Left® Security.

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

### Who makes PortSwigger and Start Left® Security DAST?

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

### Is PortSwigger a good alternative to Start Left® Security DAST?

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

## Related comparisons

- [PortSwigger vs Cobalt DAST](https://cybersectools.com/compare/cobalt-dast-vs-portswigger)
- [PortSwigger vs Mend DAST](https://cybersectools.com/compare/mend-dast-vs-portswigger)
- [PortSwigger vs NightVision Platform](https://cybersectools.com/compare/nightvision-platform-vs-portswigger)
- [Start Left® Security DAST vs Cobalt DAST](https://cybersectools.com/compare/cobalt-dast-vs-start-leftr-security-dast)
- [Start Left® Security DAST vs Mend DAST](https://cybersectools.com/compare/mend-dast-vs-start-leftr-security-dast)
- [Start Left® Security DAST vs NightVision Platform](https://cybersectools.com/compare/nightvision-platform-vs-start-leftr-security-dast)

## Alternatives to each

- [See all PortSwigger alternatives](https://cybersectools.com/alternatives/portswigger)
- [See all Start Left® Security DAST alternatives](https://cybersectools.com/alternatives/start-leftr-security-dast)

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Source: https://cybersectools.com/compare/portswigger-vs-start-leftr-security-dast

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

More on PortSwigger and Start Left® Security DAST: 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