Comparison

Google Cloud Pub/Sub vs NATS

On the evidence we track, NATS leads this comparison with a composite score of 75/100. 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 →

Machine formatsJSON Markdown GraphQLor send Accept: application/json

Google Cloud Pub/Sub53

★NATS75

Attribute comparison across 2 tools
Attribute	Google Cloud Pub/Sub	NATSLeader
Vioscale score	53 / 100low · 49%	75 / 100low · 48%
Pricing
Free tierpricing.free_tier	✓	✓
Modelpricing.model	freemium	open_source
Price levelpricing.price_level	low	free
Transparentpricing.transparent	✗	-
Integrations
Countintegrations.count	3	-
Security
Gdprsecurity.gdpr	-	✓
Scorecardsecurity.scorecard	-	7.2
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	-	20,599
Package downloads weeklyadoption.package_downloads_weekly	-	1,291,214
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 · HQ US	Available worldwide

Score

Vioscale score

Google Cloud Pub/Sub53 / 100low · 49%

NATS75 / 100low · 48%

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/Sub3

NATS–

Security

Gdpr

Google Cloud Pub/Sub–

NATS✓

Scorecard

Google Cloud Pub/Sub–

NATS7.2

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–

NATS20,599

Package downloads weekly

Google Cloud Pub/Sub–

NATS1,291,214

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 · HQ US

NATSAvailable worldwide

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

A cloud-based publish/subscribe messaging system that enables applications to ingest and stream event data at scale with guaranteed delivery, automatic scaling, and built-in replay capabilities. Integrates with data warehouses and stream processing pipelines for real-time analytics.

Independently observed

NATS

Leader

NATS enables components of a distributed software system to send messages to each other. It is an open-source project maintained by the Cloud Native Computing Foundation and can be deployed across cloud environments, on-site servers, edge computing devices, and embedded systems.

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 source

as of 2026-08-14verify ↗

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	✗	✓
On-premiseDeployment	✗	✓

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✓

On-premise

Google Cloud Pub/Sub✗

NATS✓

Integrations

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

Google Cloud Pub/Sub

3 total

BigQuery
Cloud Storage
Dataflow

Independently observed

NATS

Leader

Not documented yet.

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