Comparison

Google Cloud Pub/Sub vs NATS

On the evidence we track, NATS leads this comparison with a composite score of 68/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Google Cloud Pub/Sub full profile →NATS full profile →

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Google Cloud Pub/Sub54

★NATS68

Attribute comparison across 2 tools
Attribute	Google Cloud Pub/Sub	NATSLeader
vioscaleAI score	54 / 100medium · 50%	68 / 100medium · 58%
Pricing
Free tierpricing.free_tier	✓	✓
Modelpricing.model	freemium	open_source
Price levelpricing.price_level	low	free
Transparentpricing.transparent	✗	-
Integrations
Countintegrations.count	9	12
Security
Disclosure policysecurity.disclosure_policy	-	✓
Gdprsecurity.gdpr	-	✓
Scorecardsecurity.scorecard	-	7.4
Vulnerabilitiessecurity.vulnerabilities	-	Count: 29 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=github.com%2Fnats-io%2Fnats-server%2Fv2&per_page=100 · Last 12m: 14 · Max severity: CRITICAL
Reliability
Status pagereliability.status_page	✓	-
Adoption
Dependent reposadoption.dependent_repos	-	24,884
Github starsadoption.github_stars	-	20,867
Package downloads weeklyadoption.package_downloads_weekly	-	1,353,667
Activity
Commits last 30dactivity.commits_last_30d	-	100
Release
Cadence daysrelease.cadence_days	-	1
Historyrelease.history	-	20 items
License
Spdxlicense.spdx	-	Apache-2.0
Language
Primarylanguage.primary	-	Go
Market
Availabilitymarket.availability	Available worldwide · Popular in US	Available worldwide
Content
Faqcontent.faq	6 items	6 items

Score

vioscaleAI score

Google Cloud Pub/Sub54 / 100medium · 50%

NATS68 / 100medium · 58%

Pricing

Free tier

Google Cloud Pub/Sub✓

NATS✓

Model

Google Cloud Pub/Subfreemium

NATSopen_source

Price level

Google Cloud Pub/Sublow

NATSfree

Transparent

Google Cloud Pub/Sub✗

NATS–

Integrations

Count

Google Cloud Pub/Sub9

NATS12

Security

Disclosure policy

Google Cloud Pub/Sub–

NATS✓

Gdpr

Google Cloud Pub/Sub–

NATS✓

Scorecard

Google Cloud Pub/Sub–

NATS7.4

Vulnerabilities

Google Cloud Pub/Sub–

NATSCount: 29 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=github.com%2Fnats-io%2Fnats-server%2Fv2&per_page=100 · Last 12m: 14 · Max severity: CRITICAL

Reliability

Status page

Google Cloud Pub/Sub✓

NATS–

Adoption

Dependent repos

Google Cloud Pub/Sub–

NATS24,884

Github stars

Google Cloud Pub/Sub–

NATS20,867

Package downloads weekly

Google Cloud Pub/Sub–

NATS1,353,667

Activity

Commits last 30d

Google Cloud Pub/Sub–

NATS100

Release

Cadence days

Google Cloud Pub/Sub–

NATS1

History

Google Cloud Pub/Sub–

NATS20 items

License

Spdx

Google Cloud Pub/Sub–

NATSApache-2.0

Language

Primary

Google Cloud Pub/Sub–

NATSGo

Market

Availability

Google Cloud Pub/SubAvailable worldwide · Popular in US

NATSAvailable worldwide

Content

Faq

Google Cloud Pub/Sub6 items

NATS6 items

Capabilities

Feature-by-feature on the axes that matter for message queues. “-” means undocumented, not absent.

Capability comparison for Message Queues
Capability	Google Cloud Pub/Sub	NATS
Core
Messaging paradigm	Pub/sub	Pub/sub
Correctness
Delivery guarantee	At-least-once	-
Ordering guarantee	Per-key	-
Durability
Durable replayable log	✓	✓
Message replay / rewind	✓	✓
Interop
Wire protocol	-	-
Kafka-protocol compatible	-	-
Scale
Partitioned horizontal scaling	✓	✓
Geo / cross-region replication	✓	✓
Consumption
Consumer groups / competing consumers	✓	✓
Dead-letter queue	-	-
Deployment
Managed cloud offering exists	✓	✓
Hosting	Cloud only	Self-hosted only
Processing
Built-in stream processing	✓	-

Core

Messaging paradigm

Google Cloud Pub/SubPub/sub

NATSPub/sub

Correctness

Delivery guarantee

Google Cloud Pub/SubAt-least-once

NATS-

Ordering guarantee

Google Cloud Pub/SubPer-key

NATS-

Durability

Durable replayable log

Google Cloud Pub/Sub✓

NATS✓

Message replay / rewind

Google Cloud Pub/Sub✓

NATS✓

Interop

Wire protocol

Google Cloud Pub/Sub-

NATS-

Kafka-protocol compatible

Google Cloud Pub/Sub-

NATS-

Scale

Partitioned horizontal scaling

Google Cloud Pub/Sub✓

NATS✓

Geo / cross-region replication

Google Cloud Pub/Sub✓

NATS✓

Consumption

Consumer groups / competing consumers

Google Cloud Pub/Sub✓

NATS✓

Dead-letter queue

Google Cloud Pub/Sub-

NATS-

Deployment

Managed cloud offering exists

Google Cloud Pub/Sub✓

NATS✓

Hosting

Google Cloud Pub/SubCloud only

NATSSelf-hosted only

Processing

Built-in stream processing

Google Cloud Pub/Sub✓

NATS-

What each one is

The product in its own terms, so the numbers below have context.

Google Cloud Pub/Sub

Google Cloud's publish-subscribe messaging platform that delivers events to multiple subscribers with at-least-once delivery guarantees, cross-zone replication, and optional per-key ordering. It integrates with popular data processing, analytics, and monitoring tools for end-to-end data streaming solutions.

Independently observed

NATS

Leader

An open-source, lightweight messaging platform that combines pub/sub, request/reply, and persistent streaming capabilities into a single system for building high-performance distributed applications.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Google Cloud Pub/Sub

from $0.27/moUsage-basedFree tier

Usage-based: $40/TiB throughput, $0.27/GiB-month storage. Free tier: 10 GiB/month throughput.

Standard Pub/Sub$40/TiB throughput + $0.27/GiB-month storage (first 10 GiB throughput free)
- At-least-once message delivery
- Per-key message ordering
- Pull and push delivery modes
- Cross-zone replication
- Automatic scaling and provisioning
- +1 more

as of 2026-08-05verify ↗

NATS

Leader

Open sourceFree tier

as of 2026-10-13verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platform and deployment support comparison
Supports	Google Cloud Pub/Sub	NATS
WebPlatforms	✓	✓
CLIPlatforms	✗	✓
Cloud / SaaSDeployment	✓	✓
Self-hostedDeployment	✗	✓
HybridDeployment	✓	✗

Platforms

Web

Google Cloud Pub/Sub✓

NATS✓

CLI

Google Cloud Pub/Sub✗

NATS✓

Deployment

Cloud / SaaS

Google Cloud Pub/Sub✓

NATS✓

Self-hosted

Google Cloud Pub/Sub✗

NATS✓

Hybrid

Google Cloud Pub/Sub✓

NATS✗

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

In common (1)

Apache Kafka

Google Cloud Pub/Sub

12 total - 11 not shared

BigQuery
Cloud Storage
Dataflow
Splunk
Datadog
Striim
Informatica
Confluent Cloud
Knative Eventing
Looker Studio
Data Studio

Independently observed

NATS

Leader

12 total - 11 not shared

Stripe
Apache Spark
Apache Flink
RabbitMQ
Prometheus
RisingWave
Caddy
Deepstream
Synadia
Gatling
Yii

Independently observed

Still deciding?

Google Cloud Pub/Sub or NATS: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.