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

[Cloudflare API Shield](https://cybersectools.com/tools/cloudflare-api-shield) is a commercial [API security](https://cybersectools.com/categories/api-security) solution by [Cloudflare, Inc](https://cybersectools.com/companies/cloudflare-inc). [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.

### [Cloudflare API Shield](https://cybersectools.com/tools/cloudflare-api-shield)

Best for: Cloudflare customers protecting public APIs at the edge

It makes the list because it adds discovery, schema checks and leak scanning on a network you may already use, so there is little new to deploy. Its positive security model only lets through requests that match your schema, which works well if your OpenAPI specs are current. If they are not, or your APIs sit outside Cloudflare, weigh the schema upkeep and rerouting it would take.

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

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

### Use cases and capabilities

| | Cloudflare API Shield | Source Defense How it works |
|---|---|---|
| Web Security | Yes | Yes |
| Sandbox | – | Yes |
| Browser Security | – | Yes |

### Core features

**Cloudflare API Shield**

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

**Cloudflare API Shield**

1 integration listed. Sign in on the page to see them.

**Source Defense How it works**

No integrations listed.

## Cloudflare API Shield vs Source Defense How it works FAQ

Common questions when comparing Cloudflare API Shield vs Source Defense How it works for API security.

### What is the difference between Cloudflare API Shield and Source Defense How it works?

**Cloudflare API Shield**: API security platform for discovering, validating, and protecting API endpoints. Built by Cloudflare, Inc.

**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 Cloudflare API Shield and Source Defense How it works?

**Cloudflare API Shield** is made by Cloudflare, Inc. **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 Cloudflare API Shield a good alternative to Source Defense How it works?

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

## Related comparisons

- [Cloudflare API Shield vs Indusface AppTrana - API Protection](https://cybersectools.com/compare/cloudflare-api-shield-vs-indusface-apptrana-api-protection)
- [Cloudflare API Shield vs Prophaze API Security](https://cybersectools.com/compare/cloudflare-api-shield-vs-prophaze-api-security)
- [Cloudflare API Shield vs Wallarm API Security](https://cybersectools.com/compare/cloudflare-api-shield-vs-wallarm-api-security)
- [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 Prophaze API Security](https://cybersectools.com/compare/prophaze-api-security-vs-source-defense-how-it-works)
- [Source Defense How it works vs Wallarm API Security](https://cybersectools.com/compare/source-defense-how-it-works-vs-wallarm-api-security)

## Alternatives to each

- [See all Cloudflare API Shield alternatives](https://cybersectools.com/alternatives/cloudflare-api-shield)
- [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/cloudflare-api-shield-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/cloudflare-api-shield.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md.

More on Cloudflare API Shield 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