Closure Templates (Soy) review

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Closure Templates, also known as Soy, is an open-source templating system for building reusable HTML and UI components. It suits teams that need templates to render both in the browser and on a Java server, especially when localization and shared template logic matter. Templates can call one another, while a shared data model and expression syntax support work across the two environments.

Soy’s rendering options are its defining strength. Client-side templates can be precompiled into JavaScript, while Java handles server-side rendering. The Java SoySauce backend also supports asynchronous and streaming rendering. For teams building across both environments, that range can help keep template work within one system rather than splitting it between separate client and server template approaches. Contextual autoescaping is included to reduce XSS risk, and inline message support gives templates a path for localized text. The project is self-hosted, so it fits teams prepared to operate their own rendering stack.

Its open-source model makes Soy available without a paid plan, but buyers should weigh that against the repository’s note that support for the open-source release is minimal; documentation and community support are the listed channels. That makes it a more natural fit for teams able to rely on those resources than for organizations expecting substantial vendor assistance. Choose Soy when Java server rendering, client-side compilation, localization, and reusable templates align with your architecture. Teams seeking stronger support or a managed hosted service should consider another option.

Closure Templates (Soy) pros and cons

• Where it wins
  • Renders templates on both client and Java server environments
  • Contextual autoescaping helps reduce XSS risk
  • Inline messages support localized content
• Where it doesn't
  • Support for the open-source release is minimal
  • JavaScript and Java serve different rendering environments
  • Self-hosted deployment requires teams to manage their own setup

Closure Templates (Soy) 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. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Last updated 29 Oct 2026 · How we research and update