Design and diagrams decision
Gleek
A compact text-to-diagram app (parser + renderer + editor + export) is realistic for a single competent developer to build and maintain; Gleek’s higher-level features (AI chat, hosted collaboration, integrations) are the product differentiators you would forgo.
Visit website↗Open-source builds that already do this
Every project below is open source and already does this job today. Fork one, self-host it, or take the parts you need — the build prompt further down assumes an empty file, and this is the shortcut past that. Licences differ; check the one on each card before you ship.
What a replacement has to do
- Take a short domain-specific text description, parse it into a diagram model, render it to SVG/PNG, and export/share the result.
What it still won’t have
- Hosted multi-user collaboration / live collaboration
- AI-powered chat diagram generation
- Prebuilt templates and styling/custom themes
- Integrations (Confluence, Azure DevOps) and hosted Git-backed storage
- Priority support and team billing features
What remains hard
- Product polish and ongoing maintenance
First-year cost
Keep paying
Paying is—cheaper in year one.
On cash alone, building overtakes the subscription at 1 seat.
Money you would actually spend
Time you would spend
—
What you would spend
What we assumed
The verdict above measures whether you could build it. This one is only about money.
Runnable build prompt
Build a minimal web app (Node.js + Express backend, React frontend) that accepts a small Gleek-like text DSL and outputs downloadable SVG/PNG diagrams. In scope: a parser for the DSL, automatic layout for flow/ER/class/sequence basics, a keyboard-first text editor with live SVG preview, PNG/SVG export, and optional Git push to a user-specified repo. Out of scope: AI chat, live multi-user collaboration, paid subscription handling, Confluence/Azure integrations. Include error handling, unit tests for the parser and renderer, and a basic Dockerfile for hosting.
How we checked
How the score was reached
- Build verdict base78
- An open-source build was found+5
- 4 cited sources+3
- Price verified on pricing page+3
- 3/3 assessment runs agreed+4
- Evidence score93
The base comes from the verdict. Everything under it is a check that either happened or did not, and each one is a fact frozen in this record rather than a judgement made at render time — so the same evidence always produces the same number.
How scoring works →Cited sources · 4
Every page the run actually retrieved.
- official productGleek diagram maker
- official pricingPricing | Gleek diagram maker Pricing
- open sourcemermaid-js/mermaid-live-editor
- open sourcejgraph/drawio
Integrity checks
What held up, and what did not.
