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APIs · head to head

Stainless vs Thredd

Stainless logo

Stainless

APIs

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

From
Free
Rated
-
Full reviewWebsite
Thredd logo

Thredd

APIs

Issuer processing platform for fintechs and digital banks, formerly Global Processing Services

From
On request
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Stainless starter and Pro plan prices are not published and require contacting the company.; Thredd pricing is entirely unpublished, so cost comparison against competing processors requires a sales process.
  • They diverge on capability: Stainless covers SDK generation, Thredd covers Issuer processing.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Stainless and Thredd actually diverge.

Attributes where Stainless and Thredd differ
AttributeStainlessThredd
Starting priceFreeOn request
Pricing modelfreemiumquote
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 Thredd

  • Issuer processing
  • Multi-country reach
  • Scheme certification
  • Programme support across verticals
  • High platform availability
  • Global office footprint

What people use each for

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

Stainless

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

Thredd

  • A digital bank or fintech needing issuer processing across many countries under one contractnot Stainless
  • A BNPL, lending or crypto product needing certified card processing behind its own brandnot Stainless
  • A company that finds outdated Global Processing Services (GPS) material and needs to confirm it is now Threddnot Stainless
  • An embedded finance platform wanting a processor already integrated with core banking systems such as Mambunot 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.

Thredd

  • Pricing is entirely unpublished, so cost comparison against competing processors requires a sales process.
  • The 2023 rebrand from GPS to Thredd means research under either name alone can miss relevant material, and partner or press references before 2023 will still say GPS.
  • Issuer processing does not include the banking licence itself, so a fintech still needs a separate BIN sponsor or bank partner, adding a second relationship to manage.
  • As shared infrastructure behind many fintech brands, an outage or processing delay at Thredd becomes a simultaneous incident for every programme running on it, with limited visibility for any single customer into root cause.
  • Its verticals span crypto, BNPL and remittance broadly, so depth of specialist support in any one vertical may be thinner than a processor focused narrowly on that niche.

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

Thredd

On request
  • Thredd$undefined/year
    • Volume and programme-based pricing, not published
    • Custom quote required via sales

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 Thredd if

  • You need issuer processing.
  • You work on Web, API.
  • You also want multi-country reach.
Thredd review

Questions people ask

Is Stainless or Thredd better?
Neither clearly leads. Stainless starts at Free and Thredd at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Stainless or Thredd?
Stainless has a free tier; the other does not. Paid plans start at Free for Stainless and On request for Thredd.
Does Stainless or Thredd run on more platforms?
Stainless runs on web, api. Thredd runs on Web, API.
Can I use Stainless for free?
Yes. Stainless has a free tier, so you can try it without paying. Thredd starts at On request.
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 Thredd is typically brought in for.
What can Stainless do that Thredd cannot?
Stainless covers SDK generation, MCP server generation, Docs site generation, Webhooks and streaming support. Thredd covers Issuer processing, Multi-country reach, Scheme certification, Programme support across verticals.

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
Thredd: Is Thredd the same company as Global Processing Services?

Yes, GPS rebranded as Thredd in 2023; it is the same company and platform.

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
Thredd: Does it hold the banking licence for programmes it processes?

No, Thredd is the issuer processor; a separate bank or BIN sponsor holds the actual issuing licence.

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
Thredd: Is pricing published?

No, it requires a sales conversation.

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