Affected by the Stainless acquisition? Migrate to Bloom here. Open migration path

Alternatives

Stainless alternatives, compared by migration outcome.

The right replacement is not just the generator with the prettiest output. It is the workflow that preserves package names, imports, auth, examples, docs URLs, and release confidence.

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Alternatives to evaluate

Bloom for compatibility-first migration and hosted docs/SDK workflow.

Official self-hosted codegen for teams that want to run generation locally.

Speakeasy for OpenAPI-native SDK generation.

Fern for docs plus SDKs.

APIMatic, OpenAPI Generator, liblab, and custom internal generators.

Compare

Evaluation criteria

Can you compare old and new SDK public surfaces?

Can you keep docs and SDKs in one release workflow?

Can you dry-run npm and PyPI publishing?

Can you host docs, sitemap, and llms.txt without lock-in?

Example output

The alternatives page ranks options by migration outcome.

OpenAPI38 ops / 12 schemas

Sendblue source spec parsed into a replacement plan.

TypeScript34 methods

Bloom generated the configured TypeScript SDK method set.

Python34 methods

Bloom generated the configured Python SDK method set.

Docs scan2 tasks

The docs site has Stainless Docs Platform dependencies to replace.

Example Bloom output for this page
ExampleWhy it mattersCurrent result
Compatibility reportAny destination generator should be judged against existing SDK public surfaces.Bloom compares TypeScript and Python first.
Docs scanA generator replacement is incomplete if docs still depend on Stainless hosted APIs.Docs migration remains a first-class blocker.