DocComment vs Swimm

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
• +Annual plans release the whole year's line quota at once, which suits burst use

Cons

• −Silver, the plan with Git integration and the IDE plugin, is waitlist-only; VS Code and Cursor support is still planned
• −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

Is DocComment cheaper than Swimm?

DocComment starts at $9/mo; Swimm prices on request, so a quote is the only way to compare.

Does DocComment or Swimm have a free tier?

DocComment has a free tier; Swimm prices on request.