Lucid Train
Lucid Train: A local-first diagramming tool for developers who work offline. Ranked #6 of 32 in AI Diagram Generators by our editors (8.8/10); pricing: Free plan · 7-day trial; best for offline developer architecture work.
At a glance
- Editor score8.8 / 10
- PricingFree plan · 7-day trial
- Best forOffline developer architecture work
- Free planYes
- Paid from$30/yr
- Mermaid supportYes
- Facts checked20 Sep 2026
Where it wins
- Free Rust CLI supports local models and needs no account
- Generates architecture, system design, ER, UML, cloud, and sequence diagrams
- Exports SVG, PNG, Markdown, and Excalidraw scenes
Where it doesn't
- Visual diagram canvas requires a paid desktop plan
- Model-provider charges are separate
- The desktop plan supports up to three devices
Our verdict on Lucid Train
Lucid Train is a local-first coding and diagramming tool for developers and software teams. It analyzes code repositories or design inputs, then generates architecture, system design, sequence, ER, cloud, UML, flowchart, and related diagrams. Its free Rust CLI runs in terminal environments, while the desktop application adds a visual canvas alongside coding-agent, audit, dashboard, and connector features. Local models and offline operation make it suited to architecture work where repository content should stay within a local workflow.
Pricing is split between the free CLI and paid desktop access. The CLI includes local models or own API keys, open-source access, and no account requirement. Desktop plans cost $3 per month with monthly billing or $30 per year with annual billing, and include the native application, Design, Diagram, Audit and Dashboards, local models or own API keys, and use on up to three devices. A seven-day free trial is available, and the published starting price is $2.50 per month billed annually. Model-provider charges are separate. The visual diagram canvas is not part of the free CLI.
Lucid Train fits developer toolchains through Ollama, OpenRouter, OpenAI-compatible endpoints, VS Code, Cursor, Zed, Claude CLI, and Codex CLI. It also connects with Grafana, Prometheus, Loki, and MCP for observability and dependency-related workflows. ELK-based semantic graph layout, diagram-to-code specification conversion, Mermaid-to-Excalidraw conversion, exports, and version history of up to 50 versions per diagram give it a focused repository-to-diagram workflow. Developers who want local, offline generation and terminal access should consider it; teams seeking a browser-based visual canvas without a paid desktop plan should look elsewhere.
Your product? Our editors can test Lucid Train in depth and publish a review, labelled as paid · from $149/mo →
Lucid Train pricing
All 2 Lucid Train plans and prices →
Lucid Train fact sheet
| Free plan | Yes |
|---|---|
| Paid from | $30/yr |
| AI diagram limit | Not verified |
| Mermaid support | Yes |
| Real-time collaboration | Not verified |
| Diagram import | Yes |
| Platform | Desktop |
| Export formats | SVG, PNG, Markdown, Excalidraw |
| Free trial | 7 days · no card needed |
| Deployment | Desktop |
| Platforms | Windows, macOS, Linux |
| Support | Email, Docs |
| Built for | Solo, Small business (editorial estimate) |
| Integrations | 12 integrations: Ollama, OpenRouter, OpenAI-compatible endpoints, Grafana, Prometheus, Loki … |
| Pricing | Free plan · 7-day trial (source) |
| Website | lucidtrain.com |
| Facts checked | 20 Sep 2026 |
Lucid Train integrations
Lucid Train lists 12 integrations on its own site.
- Ollama
- OpenRouter
- OpenAI-compatible endpoints
- Grafana
- Prometheus
- Loki
- MCP
- VS Code
- Cursor
- Zed
- Claude CLI
- Codex CLI
Alternatives to Lucid Train
- OpenFlowKitA flexible free diagramming workspace for technical teams that prefer editable, portable outputs.9.4
- EraserA broad diagram workspace combining AI, diagram-as-code, collaboration, and integrations.9.3
- ArchwayA broad architecture diagram generator with AI input, collaboration, APIs, and self-hosting.9.2
See all Lucid Train alternatives →
Lucid Train vs the competition
- Lucid Train vs OpenFlowKit
- Lucid Train vs Eraser
- Lucid Train vs Archway
- Lucid Train vs LetDraw
- Lucid Train vs sysdraw
- Lucid Train vs Mermaid Chart
Compare Lucid Train with any tool side by side →
Also Ranked In
Lucid Train is ranked in 2 of our directories.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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