Comparison
Everything Stainless gives you — TypeScript/Python SDKs, OpenAPI ingestion, docs previews — plus a migration report, free hosted docs review sites, per-API-project pricing, and a launch checklist. On this page: a feature-by-feature parity table, side-by-side pricing, and the four steps to switch.
Unlimited previews and up to 2 hosted docs review sites. No credit card required.
01Feature parity
Sourced covers TypeScript/Python SDK previews and docs previews for teams leaving Stainless, then adds migration reporting, release-readiness checks, and project-based pricing on top.
| Feature | Sourced | Stainless |
|---|---|---|
| OpenAPI ingestion | ||
| OpenAPI 3.0 / 3.1 input | ||
| Imports an existing stainless.ymlSourced uses it to plan a migration and preserve package names. | ||
| Config-drift detection (methods configured but missing from spec)Surfaced as a first-class report row in Sourced. | Partial | |
| SDK generation | ||
| TypeScript SDK | ||
| Python SDK | ||
| Go SDKStainless ships Go today; on Sourced's roadmap. | ||
| Java / Kotlin / Ruby / .NET SDKsStainless covers more languages today. | ||
| MCP server generatorSourced ships a standalone OpenAPI-to-MCP generator; deeper release-pipeline publishing remains gated. | ||
| Preview SDK output before publishing | ||
| API docs | ||
| Docs preview | ||
| Custom-domain readiness | ||
| llms.txt + agent-readable docs | Partial | |
| SEO guardrails (sitemap, JSON-LD, OG) | Partial | |
| Migration & switching | ||
| Compatibility report vs current SDK surfaceSourced-specific: read your existing Stainless SDK and diff method/error/pagination surfaces before swapping packages. | ||
| stainless.yml → migration plan | ||
| Docs-platform dependency scan | ||
| Reversible plan (preview before publishing) | Partial | |
| Publishing & release | ||
| Repo-sync readiness plan | Partial | |
| npm / PyPI publish readiness checks | Partial | |
| Release-readiness checklist | Partial | |
| Long track record / public customer rosterStainless has shipped longer; this is an honest call-out, not a knock on Sourced. | ||
| Pricing | ||
| Per API project, transparentStainless now publicly frames free usage around generators; Sourced prices paid workflow by API project. | Partial | |
| Unlimited previews, no credit cardSourced adds unlimited previews and free hosted docs review sites; Stainless has a free generator tier. | Partial | |
| Free hosted docs review sitesSourced includes up to 2 noindex hosted docs review sites on Free; Stainless counts docs sites as generators. | ||
| Live SDK add-ons priced separatelySourced: $99/mo per extra live SDK, only after publishing. | ||
02Pricing, side by side
Pricing verified August 2026 from Stainless's official pricing page. Provider pricing changes frequently — verify before buying.
Free docs review sites first; Launch adds two live SDKs and production release workflows.
Public free generator tier; paid Starter, Pro, and Enterprise plans should be verified on Stainless's pricing page.
01Details
High-quality generated SDKs across many languages.
Long-running customer roster and SDK engineering team.
Granular SDK customization through stainless.yml.
Docs Platform and MCP targets are bundled with the SDK workflow.
02Details
Migration report runs before customers see any change.
Pricing per API project, not per live SDK or seat.
Docs, SDKs, redirects, and release checks live in one dashboard.
Reversible plan: preview docs + packages before publishing anything.
03Switching path
Four steps before any package or domain changes. Reversible until your team gives the green light.
Paste a public GitHub repo URL for a one-click import, or upload the files manually. Sourced reads both, recovers package names, and inventories the resources, auth, and publish settings you already have.
Sourced diffs Sourced-generated TypeScript and Python against your live Stainless SDK — zero missing methods, plus a list of shapes to review.
Hosted preview of the new docs site (with llms.txt) and a downloadable SDK preview, before any DNS or package change.
When the report is clean, Sourced prepares repo-sync, registry readiness, and docs cutover checks; external writes stay behind explicit approval.
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