---
title: "Discussion on \"RPC vs NATS: It's Not About Sync vs Async — It's About Who Owns Completion\" | Hashnode"
description: "Discussion on \"RPC vs NATS: It's Not About Sync vs Async — It's About Who Owns Completion\". The most common microservices mistake isn't picking the wrong transport. It's misreading who is responsible for knowing the work finished. A field guide to completion ownership in RPC, message bus, and event-driven systems."
url: "https://hashnode.com/posts/rpc-vs-nats-its-not-about-sync-vs-async-its-about-who-owns-completion/69e1ca4aba9f5834e25063c2"
---

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Discussion

# [RPC vs NATS: It's Not About Sync vs Async — It's About Who Owns Completion](https://harrisonsec.hashnode.dev/rpc-vs-nats-its-not-about-sync-vs-async-its-about-who-owns-completion?utm_source=hashnode&utm_medium=feed)

The most common microservices mistake isn't picking the wrong transport. It's misreading who is responsible for knowing the work finished. A field guide to completion ownership in RPC, message bus, and event-driven systems.

Apr 17 · 8 min read · harrisonsec.hashnode.dev  
Read the article

-   [#distributed-systems](https://hashnode.com/tag/distributed-systems)
-   [#grpc](https://hashnode.com/tag/grpc)
-   [#messaging](https://hashnode.com/tag/messaging)
-   [#nats](https://hashnode.com/tag/nats)
-   [#rpc](https://hashnode.com/tag/rpc)

## Written by

[Harrison Guo](https://hashnode.com/@harrisonguo)

@harrisonguo · WhiteRock, CA

  
[View profile](https://hashnode.com/@harrisonguo)

Security engineer and distributed systems practitioner. Writing about systems internals, performance, security research, and AI applications. Building harrisonsec.com.

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