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APIs · head to head

Stainless vs Treblle

Stainless logo

Stainless

APIs

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

From
Free
Rated
-
Full reviewWebsite
Treblle logo

Treblle

APIs

API observability, security, and governance platform

From
$233/month
Rated
-
Full reviewWebsite

The short version

  • Only Stainless has a free tier, so it costs nothing to try first.
  • Each has a real cost: Stainless starter and Pro plan prices are not published and require contacting the company.; Treblle no free tier is offered; the entry-level Core plan starts at $233/month billed yearly.
  • They diverge on capability: Stainless covers SDK generation, Treblle covers API discovery.
  • Prices and features above were last checked on 29 August 2026.

Where they differ

Only the attributes on which Stainless and Treblle actually diverge.

Attributes where Stainless and Treblle differ
AttributeStainlessTreblle
Starting priceFree$233/month
Pricing modelfreemiumsubscription
Free tierYesNo

Identical on both: platforms (web, api), 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 Stainless

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

Only in Treblle

  • API discovery
  • Runtime security
  • API governance
  • Compliance monitoring
  • API documentation and analytics
  • Agentic AI support

What people use each for

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

Stainless

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

Treblle

  • Gaining full visibility into API traffic across multi-cloud environmentsnot Stainless
  • Detecting shadow APIs and runtime security risksnot Stainless
  • Meeting compliance audit requirements such as HIPAA or GDPRnot Stainless
  • Governing API design standards through CI/CDnot Stainless

Where each one falls short

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

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.

Treblle

  • No free tier is offered; the entry-level Core plan starts at $233/month billed yearly.
  • Growth and Enterprise pricing is custom and not published, requiring a sales conversation to budget.
  • Core plan is limited to 1 workspace and only 30 days of data retention.
  • SSO and on-prem/BYO cloud deployment are reserved for the top Enterprise tier.

Pricing, plan by plan

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

Treblle

$233/month
  • Core$233/month
    • Billed yearly
    • 5 APIs
    • 500 requests/min
  • Growth$undefined/month
    • Custom APIs and request limits
    • 50M requests/month baseline
    • API security
  • Enterprise$undefined/month
    • Unlimited workspaces, APIs, and requests/min
    • API governance and compliance
    • SSO

Which should you pick?

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

Choose Treblle if

  • You need api discovery.
  • You work on web, api.
  • You also want runtime security.
Treblle review

Questions people ask

Is Stainless or Treblle better?
Neither clearly leads. Stainless starts at Free and Treblle at $233/month, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Stainless or Treblle?
Stainless has a free tier; the other does not. Paid plans start at Free for Stainless and $233/month for Treblle.
Does Stainless or Treblle run on more platforms?
Both run on web, api, so platform support will not decide this one for you.
Can I use Stainless for free?
Yes. Stainless has a free tier, so you can try it without paying. Treblle starts at $233/month.
What is Stainless best used for?
Stainless is most often used for generating typed sdks for a public api, producing an mcp server from an existing openapi spec, building an api documentation site alongside client libraries, giving open-source apis a free sdk generation path. Of those, generating typed sdks for a public api and producing an mcp server from an existing openapi spec are not what Treblle is typically brought in for.
What can Stainless do that Treblle cannot?
Stainless covers SDK generation, MCP server generation, Docs site generation, Webhooks and streaming support. Treblle covers API discovery, Runtime security, API governance, Compliance monitoring.

Answered from the vendors’ own pages

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
Treblle: What does Treblle cost?

Treblle's Core plan costs $233/month billed yearly and covers 5 APIs and 5M requests/month; Growth and Enterprise plans use custom pricing for larger request volumes and advanced features.

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
Treblle: Is there a free plan?

Treblle does not offer a free tier; it instead offers a no-credit-card demo rather than free ongoing access.

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
Treblle: How is usage metered?

Plans are metered by number of APIs monitored and requests per minute/month, with the Core plan capped at 500 requests/min and 5M requests/month.

Source
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