Skip to content
effecthub

DocComment 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. DocComment publishes a starting price ($9); Swimm does not. Only DocComment has a free tier.

DocCommentGenerates class, function, and inline code comments plus sidecar explanations without editing your code.SwimmStatic analysis plus AI that reads legacy code and writes the documentation and diagrams a migration team needs.

Side by side

FactDocCommentSwimm
CategoryDocumentation GeneratorsDocumentation Generators
Pricing modelFreemiumContact
Starts at$9 month—
Public APINoNo
PlatformsWebWeb, Vscode Ext
CompanyDocCommentSwimm
Launched—2019
Last verifiedSep 1, 2026Sep 6, 2026

What our research says

DocComment

DocComment stays narrowly focused on writing comments and explanations for existing code rather than trying to be a full AI coding assistant, which keeps its scope predictable. The IDE plugins that would make it fit into a normal workflow are still only planned, so today it's a web-based, paste-your-code tool.

Pros

  • Covers class, function, and inline comment granularity separately
  • Non-intrusive sidecar explanations that don't alter the original code
  • Git integration on the Silver plan for tracking documentation over time

Cons

  • VS Code and Cursor plugins are only planned, not shipped
  • Line-count limits mean heavy users will need the paid tiers quickly
  • No company background or founding info published on the site

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 DocComment if you need

  • Teams retrofitting documentation onto an undocumented codebase
  • Developers who want sidecar explanations without editing the original file
  • Projects in one of the seven supported languages

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

Browse all Documentation Generators →