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RFC sheet

Drawing

RT-RFC-7-OSS-PUBSUB

Sheet

03 / 04

Rev

C

Scale

NTS

RFC index · issued 2026-09-29

7 Open-Source Pub/Sub Tools for Streaming Data

Not financial advice. Verify claims independently.

The message brokers that can carry a real-time market feed.

  1. Valkey — Redis-compatible, the Stock Picks choice
  2. NATS — cleanest pub/sub semantics
  3. Redpanda — Kafka wire-compatible, no ZooKeeper
  4. Apache Pulsar — tiered storage + multi-tenancy
  5. RabbitMQ streams — AMQP + streams
  6. EMQX — MQTT broker at scale
  7. Memphis — dev-friendly streaming

For market-data fan-out specifically: Valkey or NATS. Everything else is solving problems (durability, replay) that cost you latency you can't afford.