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APIs · head to head

Pusher vs Stainless

Pusher logo

Pusher

APIs

Realtime messaging API for building live features into apps

From
Free
Rated
-
Full reviewWebsite
Stainless logo

Stainless

APIs

Generates client SDKs, API docs, and MCP servers from an OpenAPI spec

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Pusher the free Sandbox plan is capped at 100 concurrent connections, which is quickly outgrown by production apps.; Stainless starter and Pro plan prices are not published and require contacting the company.
  • They diverge on capability: Pusher covers Pub/sub channels, Stainless covers SDK generation.
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Pusher and Stainless actually diverge.

Attributes where Pusher and Stainless differ
AttributePusherStainless
Platformsweb, ios, android, apiweb, api

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 Pusher

  • Pub/sub channels
  • Presence channels
  • Client libraries
  • Webhooks
  • 24/7 monitoring
  • Priority support

Only in Stainless

  • SDK generation
  • MCP server generation
  • Docs site generation
  • Webhooks and streaming support
  • Automated unit tests
  • Git integration

What people use each for

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

Pusher

  • Adding live chat to a web or mobile appnot Stainless
  • Showing realtime presence of online usersnot Stainless
  • Pushing live notifications or dashboard updatesnot Stainless
  • Building collaborative features without managing WebSocket serversnot Stainless

Stainless

  • Generating typed SDKs for a public APInot Pusher
  • Producing an MCP server from an existing OpenAPI specnot Pusher
  • Building an API documentation site alongside client librariesnot Pusher
  • Giving open-source APIs a free SDK generation pathnot Pusher

Where each one falls short

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

Pusher

  • The free Sandbox plan is capped at 100 concurrent connections, which is quickly outgrown by production apps.
  • Pricing jumps sharply between tiers (e.g. $49 to $99 to $299), leaving few options for teams with moderate but growing usage.
  • Priority support with faster response times costs an additional $3,000/month on top of plan pricing.

Stainless

  • Starter and Pro plan prices are not published and require contacting the company.
  • The free plan caps APIs at 25 endpoints, which excludes larger production APIs.
  • Overage charges apply per SDK/endpoint/month once limits are exceeded, which can make costs unpredictable at scale.

Pricing, plan by plan

Pusher

Free
  • SandboxFree
    • 200k messages/day
    • 100 concurrent connections
    • Standard support
  • Startup$49/month
    • 1M messages/day
    • 500 concurrent connections
  • Pro$99/month
    • 4M messages/day
    • 2,000 concurrent connections
  • Business$299/month
    • 10M messages/day
    • 5,000 concurrent connections
    • Premium support

Stainless

Free
  • FreeFree
    • Up to 5 generators (SDKs, docs, or MCP servers)
    • 5 seats
    • APIs with 25 or fewer endpoints
  • Starter$undefined/mo
    • Unlimited generators
    • Expanded seats
    • Private SDKs of any size
  • Pro$undefined/mo
    • Custom enterprise features and pricing
  • Enterprise$undefined/mo
    • Dedicated support
    • SOC 2 compliance reports
    • Purchase order/invoicing with negotiable terms

Which should you pick?

Choose Pusher if

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

Choose Stainless if

  • You need sdk generation.
  • You want to start without paying.
  • You work on web, api.
  • You also want mcp server generation.
Stainless review

Questions people ask

Is Pusher or Stainless better?
Neither clearly leads. Pusher starts at Free and Stainless at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Pusher or Stainless?
Pusher starts at Free and Stainless at Free.
Does Pusher or Stainless run on more platforms?
Pusher runs on web, ios, android, api. Stainless runs on web, api.
Can I use Pusher for free?
Both have a free tier, so you can try either at no cost before committing.
What is Pusher best used for?
Pusher is most often used for adding live chat to a web or mobile app, showing realtime presence of online users, pushing live notifications or dashboard updates, building collaborative features without managing websocket servers. Of those, adding live chat to a web or mobile app and showing realtime presence of online users are not what Stainless is typically brought in for.
What can Pusher do that Stainless cannot?
Pusher covers Pub/sub channels, Presence channels, Client libraries, Webhooks. Stainless covers SDK generation, MCP server generation, Docs site generation, Webhooks and streaming support.

Answered from the vendors’ own pages

Pusher: What does Pusher cost?

Pusher Channels offers a free Sandbox plan (200k messages/day, 100 connections) and paid plans starting at $49/month for Startup, scaling up through Pro, Business, and several higher tiers up to $1,199/month, plus custom Enterprise pricing.

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

Yes. The Free plan supports up to 5 generators, 5 seats, APIs with 25 or fewer endpoints, and 100 preview builds per month, with email support.

Source
Pusher: Can I change or cancel my plan?

Yes, customers can log into the dashboard and adjust their plan at any time, including upgrading, downgrading, or cancelling.

Source
Stainless: Who owns the generated SDK code?

The generated SDK code is owned by the customer and published by Stainless under the Apache 2.0 license.

Source
Pusher: How is usage metered?

Usage is measured by concurrent connections and messages per day; a message counts both the publish and each delivery, so publishing one message to 50 subscribers counts as 51 messages.

Source
Stainless: What happens if I exceed my plan's endpoint limit?

Customers exceeding their endpoint limits are billed per SDK, per endpoint, per month for the overage.

Source
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