GWS review

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

GWS is an open-source WebSocket server and client library written in Go, aimed at developers building WebSocket services who want control over connection handling and I/O. Its event-driven APIs expose connection, message, ping, pong, and close events, while reads can use ReadLoop, ReadMessage, or streaming NextReader modes. That makes it a fit for Go teams building services such as connection hubs, reverse proxies, chat systems, games, streaming, or push systems. It is a library rather than a hosted service, and its published client SDK support is Go.

The standout is the range of server-side controls in one library. It supports broadcast with reusable compressed frames, permessage-deflate with context takeover options, customizable proxy dialing with SOCKS5 examples, and segmented writes for large files. Concurrent and asynchronous non-blocking writes give developers additional ways to manage output. Transport options include TCP, KCP, and Unix domain sockets. These are useful building blocks for systems that need to tune connection and message handling, but they also leave architecture and operational choices with the implementing team.

GWS is free and open source, with self-hosted deployment and community support. Its scope is narrower than a broader WebSocket platform: the pub/sub example uses the separate event_emitter package, rather than establishing built-in pub/sub, and the listed integrations are event_emitter and kcp-go. Teams looking for a Go library with granular lifecycle, read, write, compression, proxy, and transport controls should consider it. Teams seeking built-in pub/sub or a managed service should look elsewhere.

GWS pros and cons

• Where it wins
  • Event-driven server and client APIs cover WebSocket lifecycle events.
  • Offers streaming reads, asynchronous writes, and segmented large-file writes.
  • Supports broadcast, permessage-deflate, proxy dialing, TCP, KCP, and Unix sockets.
• Where it doesn't
  • Go is the only client SDK listed, limiting language options.
  • Pub/sub is not built in; the example relies on a separate event_emitter package.
  • It is a library, so teams must build and operate their own service.

GWS fact sheet, pricing and score →

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. How we rank.

Last updated 9 Oct 2026 · How we research and update