Stainlessvs
Speakeasy
Speakeasy: Speakeasy originally competed directly in SDK generation before repositioning as an AI governance platform.
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Generates client SDKs, API docs, and MCP servers from an OpenAPI spec
Overview
Stainless is a platform that generates production-quality client libraries, API documentation sites, and MCP servers from an OpenAPI specification, aiming to give any API a Stripe-quality developer experience. Generated SDK code is owned by the customer and published under the Apache 2.0 license. The platform supports webhooks, streaming, authentication configuration, and automated unit tests, and offers a free tier for small APIs plus paid tiers for larger or private SDKs and enterprise compliance needs.
The honest half
Concrete and checkable, so you can decide whether any of them matter to you. This is the half of a review a vendor will not write about Stainless.
Cross-shopped
Each pairing was judged by two reviewers asking whether a buyer would genuinely weigh the two against each other. The ones that failed were deleted rather than published.
Speakeasy: Speakeasy originally competed directly in SDK generation before repositioning as an AI governance platform.
Pricing
Taken from the vendor's own pricing page. Prices move, so check before you buy.
Free
Free
Starter
On request
Pro
On request
Enterprise
On request
Capabilities
SDK generation
Generates typed client SDKs in multiple languages from an OpenAPI spec.
MCP server generation
Generates MCP servers directly from the same API specification.
Docs site generation
Produces a documentation site alongside generated SDKs.
Webhooks and streaming support
Generated SDKs support webhooks and streaming responses out of the box.
Automated unit tests
Generates unit tests for the produced SDK code.
Git integration
Syncs generated SDK code changes through Git.
Answered, with sources
Each answer names the page it came from, so you can check it rather than take our word for it.
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.
SourceThe generated SDK code is owned by the customer and published by Stainless under the Apache 2.0 license.
SourceCustomers exceeding their endpoint limits are billed per SDK, per endpoint, per month for the overage.
SourceKeep looking
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Softwr does not host reviews and shows no star rating for Stainless, because a rating we did not collect is not ours to publish. What is here is the pricing and platform detail from the vendor’s own pages, limitations we could state concretely, and alternatives a reviewer confirmed people weigh against it. Tell us if any of it is wrong.
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Every tier, and where the cost actually lands
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