# Source Defense How it works vs Wallarm API Security: side-by-side comparison (2026) [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). [Wallarm API Security](https://cybersectools.com/tools/wallarm-api-security) is a commercial [API security](https://cybersectools.com/categories/api-security) solution by [Wallarm](https://cybersectools.com/companies/wallarm). Features, integrations, deployment and the company behind each one, side by side. ## Our take What our shortlists say about the one we picked. ### [Wallarm API Security](https://cybersectools.com/tools/wallarm-api-security) Best for: Teams wanting inline API blocking without specifications Wallarm earns its place because it can start blocking before your APIs are documented, which helps when your specs lag behind the code. It runs hybrid, so you can put the filtering where your traffic is. Before you choose it, test its blocking modes on your busiest APIs, because a wrong block there lands on real users. 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). ## Side-by-side comparison | | Source Defense How it works | Wallarm API Security | |---|---|---| | Pricing model | Commercial | Commercial | | Category | Runtime Application Self-Protection | API Security | | Verified | No | No | | Deployment type | Cloud | Hybrid | | Company size fit | SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise | | Company | Source Defense | Wallarm | | Headquarters | – | – | ### Use cases and capabilities | | Source Defense How it works | Wallarm API Security | |---|---|---| | Web Security | Yes | – | | Sandbox | Yes | – | | Browser Security | Yes | – | | Bot Protection | – | Yes | | DDoS | – | Yes | | OWASP | – | Yes | | Serverless | – | Yes | | Kubernetes | – | Yes | ### Core features **Source Defense How it works** 8 features listed. Sign in on the page to see them. **Wallarm API Security** 10 features listed. Sign in on the page to see them. ### Integrations **Source Defense How it works** No integrations listed. **Wallarm API Security** 21 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. - [Source Defense How it works](https://cybersectools.com/tools/source-defense-how-it-works) fits if you want a cloud product. - [Wallarm API Security](https://cybersectools.com/tools/wallarm-api-security) fits if you need both cloud and on-premises options. ## Source Defense How it works vs Wallarm API Security FAQ Common questions when comparing Source Defense How it works vs Wallarm API Security for runtime application self-protection. ### What is the difference between Source Defense How it works and Wallarm API Security? **Source Defense How it works**: Client-side security for websites against 3rd party vendor attacks. Built by Source Defense. **Wallarm API Security**: Inline API discovery and protection platform blocking attacks, abuse, and ATO. Built by Wallarm. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes Source Defense How it works and Wallarm API Security? **Source Defense How it works** is made by Source Defense. **Wallarm API Security** is made by Wallarm. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit. ### Is Source Defense How it works a good alternative to Wallarm API Security? In part. Source Defense How it works and Wallarm API Security are not in the same category on CybersecTools. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [Source Defense How it works vs c/side](https://cybersectools.com/compare/source-defense-how-it-works-vs-cside) - [Source Defense How it works vs Aikido Zen](https://cybersectools.com/compare/aikido-zen-vs-source-defense-how-it-works) - [Source Defense How it works vs Source Defense Platform](https://cybersectools.com/compare/source-defense-how-it-works-vs-source-defense-platform) - [Wallarm API Security vs c/side](https://cybersectools.com/compare/cside-vs-wallarm-api-security) - [Wallarm API Security vs Aikido Zen](https://cybersectools.com/compare/aikido-zen-vs-wallarm-api-security) - [Wallarm API Security vs Source Defense Platform](https://cybersectools.com/compare/source-defense-platform-vs-wallarm-api-security) ## Alternatives to each - [See all Source Defense How it works alternatives](https://cybersectools.com/alternatives/source-defense-how-it-works) - [See all Wallarm API Security alternatives](https://cybersectools.com/alternatives/wallarm-api-security) --- Source: https://cybersectools.com/compare/source-defense-how-it-works-vs-wallarm-api-security 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/source-defense-how-it-works.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on Source Defense How it works and Wallarm 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