# Cloudflare API Shield vs Data Theorem API Security: 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). [Data Theorem API Security](https://cybersectools.com/tools/data-theorem-api-security) is a commercial [API security](https://cybersectools.com/categories/api-security) solution by [Data Theorem](https://cybersectools.com/companies/data-theorem). 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 | Data Theorem API Security | |---|---|---| | Pricing model | Commercial | Commercial | | Category | API Security | API Security | | Verified | No | No | | Deployment type | Cloud | Hybrid | | Company size fit | SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise | | Company | Cloudflare, Inc. | Data Theorem | | Headquarters | – | – | ### Use cases and capabilities | | Cloudflare API Shield | Data Theorem API Security | |---|---|---| | Web Security | Yes | – | | Bot Protection | – | Yes | | DAST | – | Yes | ### Core features **Cloudflare API Shield** 10 features listed. Sign in on the page to see them. **Data Theorem API Security** 10 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. **Data Theorem API Security** 13 integrations 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. - [Cloudflare API Shield](https://cybersectools.com/tools/cloudflare-api-shield) fits if you want a cloud product. - [Data Theorem API Security](https://cybersectools.com/tools/data-theorem-api-security) fits if you need both cloud and on-premises options. ## Cloudflare API Shield vs Data Theorem API Security FAQ Common questions when comparing Cloudflare API Shield vs Data Theorem API Security for API security. ### What is the difference between Cloudflare API Shield and Data Theorem API Security? **Cloudflare API Shield**: API security platform for discovering, validating, and protecting API endpoints. Built by Cloudflare, Inc. **Data Theorem API Security**: API security platform for discovery, testing, and runtime protection. Built by Data Theorem. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes Cloudflare API Shield and Data Theorem API Security? **Cloudflare API Shield** is made by Cloudflare, Inc. **Data Theorem API Security** is made by Data Theorem. 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 Data Theorem API Security? Often, yes. Cloudflare API Shield and Data Theorem API Security are both API Security products. 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 Wallarm API Security](https://cybersectools.com/compare/cloudflare-api-shield-vs-wallarm-api-security) - [Cloudflare API Shield vs Ammune API Discovery](https://cybersectools.com/compare/ammune-api-discovery-vs-cloudflare-api-shield) - [Data Theorem API Security vs Indusface AppTrana - API Protection](https://cybersectools.com/compare/data-theorem-api-security-vs-indusface-apptrana-api-protection) - [Data Theorem API Security vs Wallarm API Security](https://cybersectools.com/compare/data-theorem-api-security-vs-wallarm-api-security) - [Data Theorem API Security vs Ammune API Discovery](https://cybersectools.com/compare/ammune-api-discovery-vs-data-theorem-api-security) ## Alternatives to each - [See all Cloudflare API Shield alternatives](https://cybersectools.com/alternatives/cloudflare-api-shield) - [See all Data Theorem API Security alternatives](https://cybersectools.com/alternatives/data-theorem-api-security) --- Source: https://cybersectools.com/compare/cloudflare-api-shield-vs-data-theorem-api-security For AI agents: 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 Data Theorem API Security: 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