Lucid Train compared with CodeViz.
Same starting point, generated from code. Different answers to what the diagram is for.
Both generate architecture views from an existing codebase rather than asking you to draw one, which makes them closer to each other than to a general diagramming tool. The differences are where they live and what happens next. CodeViz runs as a VS Code extension inside the editor you already use, with integrations into GitHub, Jira, Slack and Figma. Lucid Train is a standalone desktop application with its own coding agent, so the generated diagram can be handed back as a specification for an implementation turn.
Inside the editor or beside it
An extension has an obvious advantage: it is where you already are, and nothing has to be launched. A separate application has a different one, which is that it is not competing for the editor's screen space or its lifecycle, and can run a diagram canvas, a coding agent, a dependency audit and a dashboards tab at once without any of them being a panel squeezed into a sidebar.
Who places the boxes
Lucid Train's agent emits a semantic graph of nodes, edges and tiers with no coordinates at all, and the ELK constraint solver computes positions and orthogonal routing. Overlapping boxes are structurally impossible rather than merely unlikely, which matters most on exactly the large diagrams where a generated view is worth having.
Where your code goes
Lucid Train reads the repository on your machine and can run fully offline against local Ollama models, with no API key and no telemetry. CodeViz's site does not state whether analysis happens locally or on a server, so if that property matters to you it is worth asking them directly rather than assuming either answer.
The return path
This is the structural difference. Lucid Train converts a diagram into a markdown specification that starts a coding turn, so the architecture is an input to implementation. A visualisation tool, however good the visualisation, produces a picture and stops there.
Side by side
| Lucid Train | CodeViz | |
|---|---|---|
| Form | Desktop application | VS Code extension |
| Generates from a codebase | Yes | Yes |
| Layout | ELK constraint solver | Not stated |
| Runs fully offline with local models | Yes | Not stated |
| Built-in coding agent | Yes | No |
| Diagram to code as a specification | Yes | No |
| Dependency and MCP audit | Yes | No |
| Price | CLI free and open source; desktop $3/month, 7-day trial, no card | Free trial, pricing on request |
Questions
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- Lucid Train vs MultiplayerMultiplayer starts from a production incident. Lucid Train starts from the shape of the code.
- Lucid Train vs ClineBoth are provider-agnostic and both run local. One lives in your editor; one draws your architecture.
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