ninenines.eu

What It Is

Nine Nines is not a single SaaS product, but a collection of open-source developer tools for Erlang/OTP. Its core projects include the Cowboy HTTP server, the Gun HTTP client, the Ranch TCP/TLS socket acceptor pool, the Cowlib web protocol library, and the Erlang.mk build tool. It is better understood as an infrastructure toolkit for Erlang web and network protocol development.

Core Capabilities

Cowboy supports HTTP/1.1, HTTP/2, WebSocket, REST, static files, middleware, stream processing, and more, positioning it as a complete HTTP stack. Gun is an asynchronous, persistent-connection HTTP client that can automatically reconnect when needed and also supports WebSocket. Ranch is designed for custom TCP/TLS protocol servers, with listeners that can be inspected and reconfigured without interruption. Cowlib covers parsing and building protocols such as HTTP, WebSocket, Multipart, Cookie, and URL encoding. Overall, the ecosystem’s strengths lie in protocol completeness and deep Erlang/OTP integration.

Pricing and Support

The project pages provide source code and indicate open-source sponsorship. No commercial licensing fees are specified. The author accepts donations through GitHub Sponsors and also offers consulting, sponsorship, and training: remote consulting is 250€/hour, the day rate is 1200€, and project sponsorship starts at 200€/month. Support is more direct-from-author and sponsorship-driven than a standard enterprise SLA.

Pros and Cons

The main advantages are clear component boundaries and coverage across server-side tooling, client-side tooling, protocol libraries, and build tools. The documentation includes User Guides, Function References, and migration guides across multiple versions, making the maintenance history easy to follow. The drawbacks are that it primarily serves Erlang/OTP users, so non-Erlang teams may face higher learning and hiring costs. The main content does not provide information on licenses, package manager installation, SLA, Chinese-language materials, or mainland China mirrors.

Who It’s For and Access from China

Nine Nines is well suited to teams already using Erlang/OTP that need to build high-concurrency HTTP/WebSocket services, asynchronous clients, or custom TCP/TLS protocols. It is also a good fit for projects that need author-level protocol consulting and code review. The main content does not state the access situation from China. GitHub Sponsors payments and access may be affected by local network and payment conditions. If your team does not use Erlang, you may want to consider HTTP/WebSocket frameworks in your own language ecosystem, or alternatives such as Nginx/OpenResty, Go, Rust, or Node.js.