GitDiagram vs Sourcegraph: an architecture map or code search
Written by GitDiagram. Facts about Sourcegraph checked against its own docs on (sources).
Sourcegraph and GitDiagram do different jobs. Sourcegraph is code search: it finds exact things across many repositories (a regular expression, a symbol, every reference to a function) and lets you jump through the code. GitDiagram draws a picture of how one repository is put together. Choose Sourcegraph when you need exact, complete answers from the code, especially across a large company's repositories; choose GitDiagram when you want to see a repository's main parts and how they connect, for free and without setup. Sourcegraph does not draw an architecture overview on its own.
Which to choose
| Choose Sourcegraph when | Choose GitDiagram when |
|---|---|
| You need every match: all callers of a function, every use of an API. | You are new to a repository and want its shape before reading code. |
| You search across hundreds or thousands of repositories at once. | You want a diagram to share or put in your docs. |
| You want precise go-to-definition and find-references in the browser. | You want something free for private repositories. |
| Your company can buy an enterprise contract for its private code. | You don't know yet what to search for. |
The same repository in both
Open FastAPI on Sourcegraph and you get its files with search and code navigation, free and without signing in. Search such as repo:fastapi/fastapi Depends( lists every match with its line.
Open FastAPI on GitDiagram and you get one diagram of 20 components in 4 groups with 22 labeled connections, each component linked to its file or folder on GitHub.
The two fit together: the diagram shows where things live, and code search finds every place a thing is used.
What Sourcegraph does
Sourcegraph Code Search supports regular expressions, boolean and keyword queries, symbol, commit and diff search, and code navigation, on any code host and across many repositories. Public open source code can be searched free at sourcegraph.com/search.
Private code needs Sourcegraph Enterprise, which its pricing page lists as starting at $16K on an annual contract, self-hosted or in a single-tenant cloud. Its AI agent, Deep Search, answers questions in plain language with sources and can draw diagrams when asked, on enterprise plans. Sourcegraph has an MCP server on enterprise instances. Cody Free and Pro ended in July 2025, and Sourcegraph's main repository stopped being public in 2024.
What GitDiagram does
Replace hub with diagram in a GitHub URL to get an interactive diagram of the repository's main parts. You can pan and zoom, read a written overview, export a PNG or copy the Mermaid code.
GitDiagram's limits: it is a map of the important parts, not a complete dependency graph. It can simplify or leave things out, it works only with GitHub repositories, and it shows the repository as it was when the diagram was made (Regenerate makes a fresh one).
At a glance
| Question | GitDiagram | Sourcegraph |
|---|---|---|
| What you get | One interactive architecture diagram: up to 34 main components in groups, with labeled connections and a written overview. Each component links to its file or folder on GitHub. | Search results and code navigation across repositories; Deep Search answers on enterprise plans. |
| Setup | None. Replace hub with diagram in a GitHub URL, or paste the URL on the home page. | None for public code on sourcegraph.com; private code needs an enterprise instance. |
| Reads the code | Yes. An AI model reads the file tree, the README and up to 12 source files; every linked path is checked against the real repository. | Yes: it indexes every file, which is why its answers are exact. |
| Private code | Yes, with a fine-grained GitHub token that stays in your browser and is never saved on GitDiagram's servers. | Yes, with Sourcegraph Enterprise. |
| Price | Free. Making new diagrams is free within a shared daily limit; after that you can add your own OpenAI API key. | Public search is free. Enterprise is listed as starting at $16K on an annual contract. |
| For AI agents | Markdown at gitdiagram.com/{owner}/{repo}.md and a free MCP server at https://gitdiagram.com/mcp, no sign-in. | An MCP server on enterprise instances, signed in by OAuth or token. |
Questions
Is Sourcegraph free?
Searching public open source code on sourcegraph.com is free. Searching your company's private code needs Sourcegraph Enterprise, a paid annual contract.
Can Sourcegraph make an architecture diagram?
Not by itself. Its Deep Search agent can draw a diagram when you ask it to, on enterprise plans. GitDiagram makes an architecture diagram of any GitHub repository automatically.
Is Cody still available?
Cody Free and Cody Pro stopped taking new users in June 2025 and ended in July 2025, according to Sourcegraph. Enterprise customers kept access.
Sources
Checked on . Products change: if something here is out of date, open an issue.