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RTOS (open)

RTOS (open) — docs sheet

RFC sheet

Drawing

RT-RFC-TOP-10-OPEN-

Sheet

03 / 04

Rev

C

Scale

NTS

RFC index · issued 2026-09-29

Top 10 Open-Source Real-Time Projects Worth Contributing To

Not financial advice. Verify claims independently.

The OSS projects building the real-time stack — and where contributions actually land.

  1. NATS — CNCF, clean codebase, welcoming
  2. Valkey — Redis fork, actively seeking contributors
  3. Socket.io — most-deployed real-time library
  4. uWebSockets — fastest WS server, C++
  5. ws (Node) — the canonical Node WS lib
  6. Hono — edge-native web framework w/ WS
  7. Zod — validation that catches bad data at the edge
  8. Temporal — workflow/durable execution
  9. Redpanda — Kafka-compatible, C++
  10. RTOS reference impl — the Stock Picks-backed fan-out stack

Contribute where the PRs get merged — check commit velocity before you write code.