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DeepWiki vs Swimm

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors. DeepWiki publishes a starting price ($20); Swimm does not. Only DeepWiki has a free tier. Only DeepWiki ships a public API.

DeepWikiTurns any public GitHub repo into a question-answerable wiki, built by the makers of Devin.SwimmStatic analysis plus AI that reads legacy code and writes the documentation and diagrams a migration team needs.

Side by side

FactDeepWikiSwimm
CategoryDocumentation GeneratorsDocumentation Generators
Pricing modelFreemiumContact
Starts at$20 month—
Public APIYesNo
PlatformsWeb, APIWeb, Vscode Ext
CompanyCognition AI, Inc.Swimm
Launched—2019
Last verifiedSep 1, 2026Sep 6, 2026

What our research says

DeepWiki

DeepWiki is a genuinely useful shortcut for understanding an unfamiliar public codebase before diving into the source, and it costs nothing for that core use case. It only becomes a paid product the moment you need it on a private repository, where it quietly becomes a Devin subscription rather than its own product.

Pros

  • Completely free for public repositories, no account needed
  • Already indexed 50,000+ popular repositories
  • Conversational query interface instead of just static generated docs
  • Backed by a well-funded, actively developed company

Cons

  • Private-repo support requires a separate paid Devin subscription, not a standalone DeepWiki price
  • AI-generated documentation can misread intent in unusual or poorly-commented code
  • No indication of how often an indexed repo's docs are refreshed after the source changes

Swimm

Swimm is the rare documentation tool that treats old code as the source of truth instead of asking humans to describe it. If you are staring at a COBOL or .NET estate nobody understands, the flow maps and extracted business rules are the useful part. The catch is that it is no longer a tool you can simply buy: it is a staged engagement with engineers attached, and the self-serve documentation product it was known for is not what the site sells today.

Pros

  • Deterministic static analysis backs the AI output, so traces come from the code rather than a guess
  • Produces diagrams and flow maps, not only prose
  • Covers mainframe and COBOL alongside .NET and Java
  • Work is broken into fixed-price stages you can stop after

Cons

  • No pricing published anywhere on the site
  • Repositioned away from the continuous-documentation product it was known for
  • Aimed at large estates, which makes it overkill for a normal repository

Which one fits

Choose DeepWiki if you need

  • Developers exploring an unfamiliar open-source codebase
  • Teams wanting a queryable overview of a repo instead of reading raw source
  • Anyone already paying for Devin who wants the same treatment for a private repo

Choose Swimm if you need

  • Teams documenting a mainframe or legacy .NET/Java estate before a migration
  • Architects who need job-flow and variable traces out of unfamiliar code
  • Enterprises that want non-engineers to read what the code actually does

More comparisons

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