Alternatives to Gleek

Gleek: Text-to-diagram tool for developers that generates diagrams using only the keyboard. 8 products similar to Gleek, compared on pricing, free tier, API, MCP server, SDK and open source. 8 of 8 have a free tier, 5 of 8 have an API, 6 of 8 offer an MCP server, 1 of 8 is open source.

Lucidchart
Diagramming powered by intelligence
Frontend & design free tierMCP
Cacoo
Online diagramming tool for collaborative diagramming
Frontend & design free tier
Ilograph
Interactive system architecture diagrams
Developer productivity free tier
Tyk
API management platform and API gateway with AI, MCP and agent traffic governance on a unified control plane.
APIs & backend free tierAPIMCPSDKopen source
Geekflare API
Web scraping, search, and screenshot APIs for AI agents and developers
Scraping & browser automation free tierAPIMCPSDK
Tweek Calendar
Minimal weekly planner and to-do list app with a weekly calendar view
Other free tierAPIMCP
Linear
The system for product development
Developer productivity free tierAPIMCPSDK
Slack
AI work platform and productivity tools
Email & messaging free tierAPIMCPSDK

Side by side

Product	Pricing	Free tier	API	MCP server	SDK	Open source
Gleek	Freemium	yes	—	—	—	no
Lucidchart	Freemium	yes	—	yes	—	no
Cacoo	Freemium	yes	—	no	—	no
Ilograph	Freemium	yes	no	no	no	no
Tyk	Usage-based	yes	yes	yes	yes	yes
Geekflare API	Freemium · from $0 (Free, 500 credits/month); paid plans from $19/mo; credit packs from $10	yes	yes	yes	yes	no
Tweek Calendar	Freemium · from $5.99/month	yes	yes	yes	—	no
Linear	Freemium · from $10 per user/month (Basic, billed yearly)	yes	yes	yes	yes	no
Slack	Freemium	yes	yes	yes	yes	no

Facts come from each product's own website, or from its verified owner when they have edited the listing. Each product page shows when it was last verified and how it was extracted. Similarity comes from the products' descriptions.

API

curl https://toolgrep.com/api/products/gleek/alternatives