# @fastify/rate-limit vs Operant AI API Threat Protection: side-by-side comparison (2026) [@fastify/rate-limit](https://cybersectools.com/tools/fastifyrate-limit) is a free [API security](https://cybersectools.com/categories/api-security) solution. [Operant AI API Threat Protection](https://cybersectools.com/tools/operant-ai-api-threat-protection) is a commercial [API security](https://cybersectools.com/categories/api-security) solution by [Operant AI](https://cybersectools.com/companies/operant-ai). Features, integrations, deployment and the company behind each one, side by side. 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 | | @fastify/rate-limit | Operant AI API Threat Protection | |---|---|---| | Pricing model | Free | Commercial | | Category | API Security | API Security | | Verified | No | No | | Deployment type | On-Premises | Cloud | | Company size fit | Startup, SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise | | GitHub stars | 588 | – | | Last commit | Mar 2026 | – | | Company | – | Operant AI | | Headquarters | – | – | ### Use cases and capabilities | | @fastify/rate-limit | Operant AI API Threat Protection | |---|---|---| | Web Security | Yes | – | | Attack Paths | – | Yes | | Cloud Native | – | Yes | | Microsegmentation | – | Yes | | OWASP | – | Yes | | Kubernetes | – | Yes | ### Core features **@fastify/rate-limit** No features listed. **Operant AI API Threat Protection** 10 features listed. Sign in on the page to see them. ### Integrations **@fastify/rate-limit** No integrations listed. **Operant AI API Threat Protection** 50 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. - [@fastify/rate-limit](https://cybersectools.com/tools/fastifyrate-limit) fits if you need to run it on your own servers, you are a startup, you need a free product and you want an open-source product. - [Operant AI API Threat Protection](https://cybersectools.com/tools/operant-ai-api-threat-protection) fits if you want a cloud product. ## @fastify/rate-limit vs Operant AI API Threat Protection FAQ Common questions when comparing @fastify/rate-limit vs Operant AI API Threat Protection for API security. ### What is the difference between @fastify/rate-limit and Operant AI API Threat Protection? **@fastify/rate-limit**: A low overhead rate limiter for your routes. **Operant AI API Threat Protection**: Runtime API threat protection for Kubernetes environments with discovery, built by Operant AI. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes @fastify/rate-limit and Operant AI API Threat Protection? **@fastify/rate-limit** is open-source with 588 GitHub stars. **Operant AI API Threat Protection** is made by Operant AI. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit. ### Is @fastify/rate-limit a good alternative to Operant AI API Threat Protection? Often, yes. @fastify/rate-limit and Operant AI API Threat Protection are both API Security products. Key differences: @fastify/rate-limit is Free while Operant AI API Threat Protection is Commercial, @fastify/rate-limit is open-source. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [@fastify/rate-limit vs Prophaze API Security](https://cybersectools.com/compare/fastifyrate-limit-vs-prophaze-api-security) - [@fastify/rate-limit vs Levo Runtime Application Security](https://cybersectools.com/compare/fastifyrate-limit-vs-levo-runtime-application-security) - [@fastify/rate-limit vs Orca API Security](https://cybersectools.com/compare/fastifyrate-limit-vs-orca-api-security) - [Operant AI API Threat Protection vs Prophaze API Security](https://cybersectools.com/compare/operant-ai-api-threat-protection-vs-prophaze-api-security) - [Operant AI API Threat Protection vs Levo Runtime Application Security](https://cybersectools.com/compare/levo-runtime-application-security-vs-operant-ai-api-threat-protection) - [Operant AI API Threat Protection vs Orca API Security](https://cybersectools.com/compare/operant-ai-api-threat-protection-vs-orca-api-security) ## Alternatives to each - [See all @fastify/rate-limit alternatives](https://cybersectools.com/alternatives/fastifyrate-limit) - [See all Operant AI API Threat Protection alternatives](https://cybersectools.com/alternatives/operant-ai-api-threat-protection) --- Source: https://cybersectools.com/compare/fastifyrate-limit-vs-operant-ai-api-threat-protection For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/fastifyrate-limit.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on @fastify/rate-limit and Operant AI API Threat Protection: 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