DeepWiki, from Devin maker Cognition, turns public GitHub repositories into AI-generated wikis with architecture diagrams, source links and codebase Q&A. It is free on the web and through an MCP server, while private repositories run through a Devin account.
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DeepWiki is a free web service from Cognition, the company behind the Devin coding agent, that turns public GitHub repositories into AI-generated wikis you can question in plain language. The DeepWiki homepage describes the service as up-to-date documentation you can talk to for every repo in the world, and likens it to Deep Research for GitHub.
Cognition introduced DeepWiki as the free public version of its Devin Wiki and Devin Search tools. In practice the product has two homes: the open site and MCP server for public code, and the same wiki engine inside the Devin app for an organization's own repositories, where accounts, effort levels and billing apply.
At launch in May 2025, Cognition said it had already indexed over 50,000 of the top public GitHub repos. As AI code documentation, DeepWiki is built for reading and understanding existing code rather than writing new code: its output is a browsable wiki with diagrams and source links, plus a question box grounded in the repository.
For public GitHub repositories, DeepWiki automatically generates architecture diagrams, documentation and links to source code, so wiki pages point back to the files they describe. When a project has no page yet, users can submit their own public GitHub repository URL for indexing. Maintainers can also add a DeepWiki badge to a project's README with Cognition's badge maker.
Beyond reading pages, you can ask complex questions about a codebase and get context-grounded, specific answers. Inside the Devin app, Ask Devin draws on the wiki to find relevant context in your code, so the generated documentation also feeds the question tool.
The trade-off is control versus coverage: named sections are guaranteed, but anything not listed is left out.
The two read tools return a repository's documentation topics and page contents, while ask_question returns a synthesized answer instead of raw pages.
In the Devin app, DeepWiki is generated automatically when repositories are connected during onboarding; the steps below add more repositories later.
The same thread also carries accuracy complaints from other maintainers, covered under Limitations, so these examples show how the wikis are used rather than how reliable they are.
Less suitable:
Independent technology press coverage in November 2025 described DeepWiki as already available for private repositories.
Adding a public repo at deepwiki.com is free, while private repos require signing up for a Devin account. In May 2025, Cognition said the DeepWiki MCP server, like DeepWiki.com, is completely free with no login or auth required.
| Effort level | Approximate cost | Requirement |
|---|---|---|
| Low (default) | Free | None |
| Medium | ~5-10 ACUs per wiki | Active subscription or available credits |
| High | ~20-40 ACUs per wiki | Active subscription or available credits |
Only the Medium and High levels carry an ACU cost, and both require an active subscription or available credits. The effort level is configurable per org and can be overridden per repo from the wiki page.
| Plan | Price | Members |
|---|---|---|
| Free | Free | 1 |
| Pro | $20/month | 1 |
| Max | $200/month | 1 |
| Teams | $80/month minimum | Up to 200 |
Devin's Free plan offers limited Devin usage and includes access to DeepWiki. Paid individual plans run from Pro at $20/month to Max at $200/month, and Teams starts from an $80/month minimum for up to 200 members. The Devin pricing page lists Teams at $80/month for the team plan plus $40/month per full dev seat. Devin's billing docs instead say the $80 Teams minimum can be met with any combination of full seats at $40 each and on-demand credits, so the two pages word Teams pricing differently.
Code Wiki was announced on November 13, 2025. The main contrast is the private-code route: DeepWiki's runs through the hosted Devin app, while Code Wiki's was announced as a local CLI extension.
It is not a Cognition product. Because it reuses the DeepWiki name, search results that mention DeepWiki may refer to this project rather than Cognition's hosted service; it fits teams that want the source code under an MIT licence or need GitLab and BitBucket coverage.
Generated wikis can be wrong. In an August 2025 public developer thread, several open-source maintainers reported specific errors:
These are individual reports from one thread, dated August 2025, not a measured error rate.
No DeepWiki-specific privacy policy appears in the Cognition and Devin pages checked; Cognition's company privacy policy covers its software-as-a-service offerings, naming Devin and Windsurf as examples, along with associated software, apps and websites. That policy also says people under 18 should stop accessing its Services.
These statements describe Devin, which hosts the private-repository version of DeepWiki; none of them names DeepWiki directly.
Yes for public repositories: adding a public repo and using the DeepWiki MCP server cost nothing. Wikis for private repositories run in the Devin app, where Low effort generation is free and Medium or High effort uses ACUs.
Only through a Devin account. Private repositories are indexed in the Devin app, and AI tools reach them through the authenticated Devin MCP server rather than the public DeepWiki MCP server.
Cognition's May 2025 launch posts describe DeepWiki.com and its MCP server as free with no login or auth required. The Devin app and the Devin MCP server do require an account.
Cognition, the company behind the Devin coding agent. Similarly named open-source projects such as DeepWiki-Open are unaffiliated.
Inside Devin, a .devin/wiki.json file in the repository root sets the pages and notes used for generation. For public wikis, one maintainer reported in August 2025 that there was no clear way to request a takedown.
The sources checked contain no measured accuracy figures. Maintainers have publicly reported incorrect pages for projects including LibreOffice and LLVM.
