Side by side

Google Cloud Pub/Sub vs VerneMQ

Both stand on message broker software. Which one you can start free with, which one lets you read the code, and what each costs once you pay.

Google Cloud Pub/Sub

Free plan APIWeb

Pub/Sub provides message delivery controls and integrations for service-to-service workloads. Its authentication options, typical latency, and intended audience are important constraints to weigh.

Visit Google Cloud Pub/Sub

VerneMQ offers a broad MQTT protocol range, clustering, integrations, and monitoring for self-hosted environments. Check operating-system support and the production subscription requirement before deployment.

Visit VerneMQ

The facts

	Google Cloud Pub/Sub	VerneMQ
Free plan	Yes	Yes
Open source	Not published	Not published
Runs on	API, Web	API, Linux, Mac, Self-hosted
Lowest paid plan	See the plans	Free or on request
Plans published	4	1
Maker	Not published	Not published
Website	cloud.google.com	vernemq.com
On message broker software	#21 of 39	#29 of 39

Google Cloud Pub/Sub: what it does well

First 10 GB per month is free.
Supports REST and gRPC.
Includes seek, replay, and dead letter topics.
Automatic provisioning after quota is set.
Maximum message size is 10 MB.

What to know first

API keys are not supported for authentication.
Intended for services, not direct end-user or IoT clients.
Typical communication latency is around 100 milliseconds.

VerneMQ: what it does well

Supports MQTT 3.1, 3.1.1, and 5.0
Masterless clustering handles node or network failures
TLS encryption is available
Integrates with PostgreSQL, MySQL, Redis, and MongoDB
Extensible through plugins, Lua, and webhooks

What to know first

Windows is not currently supported
Production use of packages requires a paid subscription
Self-hosted deployment requires your infrastructure

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