Yellowstone gRPC

An open-source Geyser plugin implementation by Triton One that re-exposes the validator's internal event stream over a gRPC/Protobuf interface, enabling clients to subscribe to filtered streams of account updates, transactions, and slot notifications with sub-millisecond latency from the validator. It has become the de facto streaming standard for Solana MEV bots, high-frequency trading systems, and indexers that require lower latency and richer filtering than WebSocket subscriptions provide.