Web application programming platform.
Event-driven, truly non-blocking.

JS-like syntax

Opa new default syntax is more similar to JavaScript and other C-like languages, which increases readability and familiarity of the source code. The previous syntax is still available, per community request.

Enhanced support for MongoDB

In addition to a full-featured MongoDB driver, Opa S4 optionally provides a high-level, typed syntax to handle database queries and updates in a safe and easy way. This unique typed setting ensures full consistency at compile time between the data model of the application and the requests sent to MongoDB.

What is Opa?

Opa is the new generation of Web development language that allows users to write distributed web applications using a single technology.
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Why Opa?

Opa Web development platform is well-suited for building distributed Web applications and services as well as games!
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News & Events

Press Release

Opa S4, the New Version of Opa, Is Now Available.

Offers New Syntax and Support for MongoDB | Read ›

Opa Paris DevCamp at "La Cantine"

March 7 2012 7PM-10PM

Technical presentations and use cases around Opa, coding workshops animated by the organizing team | Subscribe now ›

InfoWorld

Programming Opa: Web development, reimagined

MLstate's Opa streamlines Web app development with a single language for client and server, but the bright promise is not without pitfalls | Learn more ›