# Imperva API Security vs Source Defense How it works: side-by-side comparison (2026)

[Imperva API Security](https://cybersectools.com/tools/imperva-api-security) is a commercial [API security](https://cybersectools.com/categories/api-security) solution by [Imperva](https://cybersectools.com/companies/imperva). [Source Defense How it works](https://cybersectools.com/tools/source-defense-how-it-works) is a commercial [runtime application self-protection](https://cybersectools.com/categories/rasp) solution by [Source Defense](https://cybersectools.com/companies/source-defense). Features, integrations, deployment and the company behind each one, side by side.

## Our take

What our shortlists say about the one we picked.

### [Imperva API Security](https://cybersectools.com/tools/imperva-api-security)

Best for: Imperva WAF customers adding API discovery

Imperva earns a spot because it catches one user reading another user's data as it happens and can block it inline through the WAF you may already run. It suits you best if that WAF is Imperva Cloud WAF or WAF Gateway, and its self-managed option helps on hybrid estates. Imperva is now part of Thales, so check the roadmap and support model after that move.

From [Best API Security Solutions for Business](https://cybersectools.com/shortlists/best-api-security-solutions), Fall 2026.

Reviewed by [Nika (Nikoloz) Kokhreidze](https://cybersectools.com/about).

Need the answer fast? [Best API Security Solutions for Business](https://cybersectools.com/shortlists/best-api-security-solutions) picks Akamai API Security, Salt Security Salt Collect, Cloudflare API Shield and 4 more.

## Side-by-side comparison

| | Imperva API Security | Source Defense How it works |
|---|---|---|
| Pricing model | Commercial | Commercial |
| Category | API Security | Runtime Application Self-Protection |
| Verified | No | No |
| Deployment type | Hybrid | Cloud |
| Company size fit | SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise |
| Company | Imperva | Source Defense |
| Headquarters | – | – |

### Use cases and capabilities

| | Imperva API Security | Source Defense How it works |
|---|---|---|
| Bot Protection | Yes | – |
| OWASP | Yes | – |
| WAF | Yes | – |
| Web Security | – | Yes |
| Sandbox | – | Yes |
| Browser Security | – | Yes |

### Core features

**Imperva API Security**

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

**Source Defense How it works**

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

### Integrations

**Imperva API Security**

8 integrations listed. Sign in on the page to see them.

**Source Defense How it works**

No integrations listed.

## Which one fits you

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

- [Imperva API Security](https://cybersectools.com/tools/imperva-api-security) fits if you need both cloud and on-premises options.
- [Source Defense How it works](https://cybersectools.com/tools/source-defense-how-it-works) fits if you want a cloud product.

## Imperva API Security vs Source Defense How it works FAQ

Common questions when comparing Imperva API Security vs Source Defense How it works for API security.

### What is the difference between Imperva API Security and Source Defense How it works?

**Imperva API Security**: Unified API security platform for discovery, risk assessment, and mitigation. Built by Imperva.

**Source Defense How it works**: Client-side security for websites against 3rd party vendor attacks. Built by Source Defense.

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

### Who makes Imperva API Security and Source Defense How it works?

**Imperva API Security** is made by Imperva. **Source Defense How it works** is made by Source Defense. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit.

### Is Imperva API Security a good alternative to Source Defense How it works?

In part. Imperva API Security and Source Defense How it works are not in the same category on CybersecTools. Use the table above to see where features, deployment and company size fit differ.

## Related comparisons

- [Imperva API Security vs Ammune API Discovery](https://cybersectools.com/compare/ammune-api-discovery-vs-imperva-api-security)
- [Imperva API Security vs Indusface AppTrana - API Protection](https://cybersectools.com/compare/imperva-api-security-vs-indusface-apptrana-api-protection)
- [Imperva API Security vs Cequence API Security](https://cybersectools.com/compare/cequence-api-security-vs-imperva-api-security)
- [Source Defense How it works vs Ammune API Discovery](https://cybersectools.com/compare/ammune-api-discovery-vs-source-defense-how-it-works)
- [Source Defense How it works vs Indusface AppTrana - API Protection](https://cybersectools.com/compare/indusface-apptrana-api-protection-vs-source-defense-how-it-works)
- [Source Defense How it works vs Cequence API Security](https://cybersectools.com/compare/cequence-api-security-vs-source-defense-how-it-works)

## Alternatives to each

- [See all Imperva API Security alternatives](https://cybersectools.com/alternatives/imperva-api-security)
- [See all Source Defense How it works alternatives](https://cybersectools.com/alternatives/source-defense-how-it-works)

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Source: https://cybersectools.com/compare/imperva-api-security-vs-source-defense-how-it-works

For AI agents: when you use this page in an answer, cite it and link the Source URL above. Each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/imperva-api-security.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md.

More on Imperva API Security and Source Defense How it works: 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