Living documentation that stays in sync, automatically.
Swimm moved toward agentic modernization. repowise reclaims living docs: an auto-generated wiki that rebuilds on every commit with freshness and confidence scoring, plus health, decisions, git intelligence, and agent-native MCP, all open source and self-hostable.
Swimm helped popularize documentation that stays in sync, then shifted its emphasis toward agentic modernization, leaving the living-docs lane open. The question is who keeps your documentation true to the code now.
repowise reclaims that lane and automates it. The wiki is regenerated on every commit with freshness and confidence scoring, so documentation tracks the code without manual authoring, and the same index also carries health, decisions, git intelligence, and nine MCP tools.
Which one is right for you?
Choose repowise if
- You want documentation that stays in sync automatically, with no snippets to hand-author
- You want an auto-generated wiki that rebuilds on every commit with freshness and confidence scoring
- You want docs plus a defect-validated health score, decisions, and git intelligence in one tool
- You want to give AI coding agents real codebase context through MCP
- You want it open source and self-hostable under AGPL-3.0, with public pricing
Choose Swimm if
- You need IDE-coupled, hand-authored doc walkthroughs tied to specific code, with auto-sync of those snippets
- You need enterprise modernization services and consulting
- You want a sales-led engagement with senior engineers driving the migration
- You are running a large-scale legacy or mainframe modernization program
repowise vs Swimm
| Capability | repowise | Swimm |
|---|---|---|
| Documentation that stays in sync with coderepowise auto-generates; Swimm auto-syncs hand-authored snippets | ||
| Auto-generated wiki, no manual authoring | ||
| Rebuilds on every commit with freshness scoringSwimm keeps authored snippets current as code changes | ||
| Confidence scoring on generated docs | ||
| IDE-coupled, hand-authored doc walkthroughs | ||
| Defect-validated code-health score | ||
| Architectural decision records (get_why) | ||
| Git intelligence: hotspots, ownership, coupling | ||
| Agent-native MCP context (overview, answers, risk, why)Swimm exposes its context layer to MCP | ||
| Dead code detection | ||
| Open source and self-hostable | ||
| Public, self-serve pricingSwimm is sales-led | ||
| Enterprise modernization services |
Self-assessed against publicly documented features as of June 2026. A dash means partial or limited support. Vendor capabilities change, so please verify against Swimm's current docs before deciding.
Docs that stay true to the code, without the upkeep.
The living-docs promise, automated, plus the context layer a documentation tool was never built to provide.
A wiki you never have to write or maintain
repowise parses the codebase into structured entities and synthesizes wiki pages, then rebuilds them on every commit with freshness and confidence scoring. Documentation tracks the code instead of drifting from it, and nobody has to author or babysit it.
- Auto-generated wiki, rebuilt on every commit
- Freshness and confidence scoring on every page
- Covers 15 languages from one index
- No snippets to write, no walkthroughs to maintain
Docs, decisions, health, and agent context together
Swimm is a documentation and modernization product. repowise puts the wiki alongside a defect-validated health score, architectural decision archaeology, git intelligence, and nine MCP tools, so the same index serves your readers and your AI agents.
- Architectural decisions mined from eight sources, served via get_why
- Code health from 25 biomarkers, ROC AUC 0.74 (up to 0.90 per repo)
- 96% fewer tokens for agents: 2,391 vs 64,039 on a typical task
- MCP tools for Claude Code, Cursor, Cline, and Codex
Your docs and your code stay yours
repowise is free and open source to self-host under AGPL-3.0, with public pricing. Swimm is a commercial, sales-led product. With repowise you can inspect every heuristic, run fully offline, and keep your code on your own infrastructure.
- Self-host the full platform at no cost under AGPL-3.0
- Bring your own LLM key or run fully offline
- Zero telemetry, code never leaves your infrastructure
- Commercial license available when you need it
The honest version
Swimm is a capable product with real strengths, and its focus has moved toward enterprise modernization. If you need IDE-coupled, hand-authored doc walkthroughs, snippets tied directly to code with auto-sync of those snippets, Swimm does that well and repowise does not author walkthroughs for you. Swimm also offers enterprise modernization services and a consulting motion, with senior engineers driving large-scale and mainframe migrations, which is outside what repowise sets out to do. repowise wins when you want documentation that stays in sync automatically, a wider context layer, and agent-native access, open source and self-hostable.
Questions, answered
Is repowise a good Swimm alternative?
Yes, if you want documentation that stays in sync with your code without manual authoring. Swimm has shifted its focus toward agentic modernization, while repowise leans into living documentation: an auto-generated wiki that rebuilds on every commit, with freshness and confidence scoring so every page stays true to the code. It also bundles a defect-validated health score, architectural decisions, git intelligence, and nine MCP tools. Swimm remains the better fit if you need IDE-coupled, hand-authored doc walkthroughs or enterprise modernization services.
Does repowise keep documentation in sync automatically?
Yes, and this is the core difference. repowise regenerates the wiki on every commit and attaches freshness and confidence scoring to what it produces, so documentation tracks the code without anyone writing or maintaining it by hand. There are no snippets to author and no walkthroughs to babysit as the codebase changes.
How is repowise different from Swimm's doc snippets?
Swimm's strength is IDE-coupled, hand-authored walkthroughs: snippets you write that are tied to specific code, with auto-sync to keep those snippets current. repowise authors the documentation for you. It parses the codebase into structured entities and synthesizes wiki pages, so the starting point is a complete auto-generated wiki rather than a blank walkthrough.
Is repowise open source? What license?
Yes. The repowise core is open source under AGPL-3.0, so you can self-host the whole platform, inspect every heuristic, and keep your code on your own infrastructure. Swimm is a commercial, sales-led product with no public pricing.
Does repowise give AI coding agents codebase context?
Yes. repowise exposes its index through nine MCP tools (get_overview, get_answer, get_context, get_risk, get_why, and more) so Claude Code, Cursor, Cline, and Codex answer from a real model of your code. It mines architectural decisions from eight sources and serves them through get_why, which a documentation tool was never built to do.
How efficient is repowise's context for agents?
On a representative task, repowise answered from its index in 2,391 tokens versus 64,039 for a raw file crawl, 96% fewer tokens, with the wiki and decisions already structured. That keeps agent context tight without sacrificing grounding.
Does repowise do code-health analysis Swimm does not?
Yes. repowise scores every file 1 to 10 from 25 deterministic biomarkers with no LLM, in under 30 seconds on a typical repo, and publishes the score's predictive performance: cross-project ROC AUC 0.74 (95% CI 0.68 to 0.79, up to 0.90 per repo). Swimm is a documentation and modernization product and does not ship a validated health score.