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<img src='http://kentonv.github.io/capnproto/images/infinity-times-faster.png' style='width:334px; height:306px; float: right;'>

Cap'n Proto is an insanely fast data interchange format and capability-based RPC system. Think
JSON, except binary. Or think [Protocol Buffers](https://github.com/google/protobuf), except faster.
In fact, in benchmarks, Cap'n Proto is INFINITY TIMES faster than Protocol Buffers.

[Read more...](http://kentonv.github.io/capnproto/)
