A complete pure-Rust DDS implementation — open, audit-ready, no vendor lock-in.

ZeroDDS is the only complete OMG DDS implementation in pure Rust. It speaks native RTPS 2.5 — the same wire protocol as Cyclone, Fast DDS and RTI Connext — and interoperates with them out of the box. Ships under Apache 2.0 with no per-seat fees and no commercial gate.

From cargo add zerodds-dcps to a publisher talking to a subscriber takes about five minutes. One IDL file generates native types in Rust, C++, C#, Java, Python and TypeScript.

Seven core layers (RTPS, DCPS, XTypes, Security, XML, XRCE, RPC) at the centre. Nine protocol bridges (MQTT, AMQP, CoAP, WebSocket, gRPC, OPC UA, Zenoh, Web-Enabled DDS with REST and SOAP, CORBA) and the DDS-XRCE agent at the edge; ROS 2 loads ZeroDDS directly through rmw_zerodds. The full CORBA 3.3 family for finance and aerospace migration. QoS cookbook, security plugin stack, and OTLP/Prometheus observability are first-class, not bolted on.

Side-by-side per-feature evaluation against the established DDS vendors — Cyclone DDS, Fast-DDS (OSS & Pro), RTI Connext, OpenDDS, OpenSplice CE plus the Rust contenders dust-dds and RustDDS. ~80 feature rows across 8 sections with per-cell footnotes and source links to every vendor's documentation.

Publishers send, subscribers receive, topics route, QoS shapes the flow, discovery finds participants. That is the whole DDS model in one sentence.