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Up to three tools. The table shows the data as-is, without picking a “best”.
| Field | Bruno | D2 | Miller |
|---|---|---|---|
| Platforms | Universal | Universal | Universal, MCP, Claude Code, Codex, Cursor |
| Local support | Yes | Yes | Yes |
| Paid API | No | No | No |
| License | MIT | MPL-2.0 | BSD-2-Clause |
| Stars | 47971 | 25774 | 10055 |
| Last activity | October 30, 2026 | October 11, 2026 | October 21, 2026 |
| Install complexity | EASY | Easy with a supported package manager; Homebrew must already be installed for this command. Official binaries, Windows, Linux, and source options are documented. | EASY |
| Category | Testing, Git | Workflow, UI | Workflow, Data |
| Best use | Ideal for a solo developer or small team that wants API collections and tests beside the code with Git review. Use it for repeatable REST, GraphQL, gRPC, and WebSocket checks—not live cloud collaboration or load testing. | For developers and small teams that want architecture and data-flow diagrams close to the repository and reviewable as text. Use it when relationships matter more than pixel-perfect placement; not for free-form marketing design or exact manual positioning. | Ideal for developers, data analysts, and operators who need to clean a CSV export, inspect JSON Lines, or summarize a large file from the terminal without starting a Python project. Use it for quick, repeatable file processing; concurrent transactions and advanced visual analysis still call for a database or complementary analytics tool. |