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APIs · head to head

PubNub vs Spring Cloud Gateway

PubNub logo

PubNub

APIs

Realtime communication platform for chat, IoT, and live data apps

From
Free
Rated
-
Full reviewWebsite
Spring Cloud Gateway logo

Spring Cloud Gateway

APIs

API gateway built on Project Reactor for building microservices

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: PubNub free plan storage history is limited to 7 days, which is short for apps needing longer message retention.; Spring Cloud Gateway released under the Apache 2.0 license, free and open source with no commercial tier
  • They diverge on capability: PubNub covers Pub/sub messaging, Spring Cloud Gateway covers Routing.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which PubNub and Spring Cloud Gateway actually diverge.

Attributes where PubNub and Spring Cloud Gateway differ
AttributePubNubSpring Cloud Gateway
Pricing modelfreemiumopen-source
Platformsweb, ios, android, apiJava, Spring Boot
FoundedUnknown1998

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (APIs).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in PubNub

  • Pub/sub messaging
  • Presence tracking
  • Message persistence
  • Serverless Functions
  • File sharing
  • Encryption and access controls

Only in Spring Cloud Gateway

  • Routing
  • Path Rewriting
  • Circuit Breaker
  • Spring Boot
  • Spring Security
  • Spring Cloud
  • Java support
  • Spring Boot support

What people use each for

The jobs each tool is most often brought in to do.

PubNub

  • Building realtime chat applicationsnot Spring Cloud Gateway
  • Streaming live IoT sensor datanot Spring Cloud Gateway
  • Adding presence indicators to collaborative appsnot Spring Cloud Gateway
  • Running edge logic with serverless Functions on realtime eventsnot Spring Cloud Gateway

Spring Cloud Gateway

  • API Developmentnot PubNub
  • API Gatewaynot PubNub
  • API Testingnot PubNub
  • API Documentationnot PubNub
  • Microservicesnot PubNub

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

PubNub

  • Free plan storage history is limited to 7 days, which is short for apps needing longer message retention.
  • MAU-based pricing means costs scale directly with user growth, which can be less predictable than flat message-based pricing.
  • Pro-tier custom pricing above 50,000 MAU requires contacting sales rather than self-serve checkout.

Spring Cloud Gateway

  • Released under the Apache 2.0 license, free and open source with no commercial tier

Pricing, plan by plan

PubNub

Free
  • FreeFree
    • Up to 200 MAU or 1M transactions
    • 1GB data storage (7 days)
    • 5 test Serverless Functions
  • Starter$98/month
    • 1,000 MAU included
    • User management
    • Insights
  • Pro$undefined/month
    • Custom MAU packages
    • Volume discounts
    • Enterprise-scale configurations

Spring Cloud Gateway

Free
  • Open SourceFree
    • Core Spring Cloud Gateway
    • Community support

Which should you pick?

Choose PubNub if

  • You need pub/sub messaging.
  • You want to start without paying.
  • You work on web, ios, android, api.
  • You also want presence tracking.
PubNub review

Choose Spring Cloud Gateway if

  • You need routing.
  • You want to start without paying.
  • You work on Java, Spring Boot.
  • You also want path rewriting.
Spring Cloud Gateway review

Questions people ask

Is PubNub or Spring Cloud Gateway better?
Neither clearly leads. PubNub starts at Free and Spring Cloud Gateway at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, PubNub or Spring Cloud Gateway?
PubNub starts at Free and Spring Cloud Gateway at Free.
Does PubNub or Spring Cloud Gateway run on more platforms?
PubNub runs on web, ios, android, api. Spring Cloud Gateway runs on Java, Spring Boot.
Can I use PubNub for free?
Both have a free tier, so you can try either at no cost before committing.
What is PubNub best used for?
PubNub is most often used for building realtime chat applications, streaming live iot sensor data, adding presence indicators to collaborative apps, running edge logic with serverless functions on realtime events. Of those, building realtime chat applications and streaming live iot sensor data are not what Spring Cloud Gateway is typically brought in for.
What can PubNub do that Spring Cloud Gateway cannot?
PubNub covers Pub/sub messaging, Presence tracking, Message persistence, Serverless Functions. Spring Cloud Gateway covers Routing, Path Rewriting, Circuit Breaker, Spring Boot.

Answered from the vendors’ own pages

PubNub: What does PubNub cost?

PubNub offers a free plan for up to 200 MAU or 1 million transactions, a Starter plan at $98/month for 1,000 MAU, and custom Pro pricing for larger volumes, e.g. around $550/month for 10,000 MAU.

Source
Spring Cloud Gateway: Is Spring Cloud Gateway free?

Yes, Spring Cloud Gateway is free and open-source software. It is part of the Spring ecosystem and available through GitHub repositories with open-source dependencies like spring-cloud-starter-gateway-server-webflux and spring-cloud-starter-gateway-server-webmvc.

Source
PubNub: Is there a free plan, and what are its limits?

Yes, the free plan supports up to 200 monthly active users or 1 million transactions, includes 1GB of data storage retained for 7 days, and requires no credit card.

Source
Spring Cloud Gateway: What enterprise support is available for Spring Cloud Gateway?

Tanzu Spring provides optional enterprise support including Day 0 access to security patches for organizations requiring guaranteed support, but specific pricing is not published on the Spring Cloud Gateway project page.

Source
PubNub: How is usage metered?

PubNub bills primarily by Monthly Active Users, defined as a unique user who connects at least once in a billing cycle; messages are bundled into MAU pricing with no separate per-message fees, and overage is billed proportionally.

Source
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