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APIs · head to head

PubNub vs Swagger

PubNub logo

PubNub

APIs

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

From
Free
Rated
-
Full reviewWebsite
Swagger logo

Swagger

APIs

API design and documentation platform for building, testing, and managing APIs

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.; Swagger specific pricing details not published on main website; requires accessing pricing page or contacting sales
  • They diverge on capability: PubNub covers Pub/sub messaging, Swagger covers API Specification.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which PubNub and Swagger actually diverge.

Attributes where PubNub and Swagger differ
AttributePubNubSwagger
Platformsweb, ios, android, apiWeb, CLI, Desktop
FoundedUnknown2011

Identical on both: starting price (Free), pricing model (freemium), 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 Swagger

  • API Specification
  • Interactive Documentation
  • Code Generation
  • GitHub
  • GitLab
  • Azure DevOps
  • Jira
  • Web support

What people use each for

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

PubNub

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

Swagger

  • 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.

Swagger

  • Specific pricing details not published on main website; requires accessing pricing page or contacting sales

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

Swagger

Free
  • FreeFree
    • OpenAPI specification
    • Swagger UI
    • API documentation
  • Professional$20/monthly
    • Advanced features
    • Team collaboration
    • API testing
  • Enterprise$undefined/monthly
    • Custom deployment
    • Advanced security
    • Dedicated 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 Swagger if

  • You need api specification.
  • You want to start without paying.
  • You work on Web, CLI, Desktop.
  • You also want interactive documentation.
Swagger review

Questions people ask

Is PubNub or Swagger better?
Neither clearly leads. PubNub starts at Free and Swagger at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, PubNub or Swagger?
PubNub starts at Free and Swagger at Free.
Does PubNub or Swagger run on more platforms?
PubNub runs on web, ios, android, api. Swagger runs on Web, CLI, Desktop.
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 Swagger is typically brought in for.
What can PubNub do that Swagger cannot?
PubNub covers Pub/sub messaging, Presence tracking, Message persistence, Serverless Functions. Swagger covers API Specification, Interactive Documentation, Code Generation, GitHub.

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
Swagger: How much does Swagger cost?

Swagger does not publish specific pricing details on its main website. A free tier is available with a Start Free Trial option. For detailed pricing information, users must visit the dedicated pricing page or contact Swagger sales directly.

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
Swagger: Does Swagger offer a free plan?

Yes, Swagger offers a free tier described as simple, useful, and easy to master for API client functionality. Exact feature details and limitations are not specified on the homepage.

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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