Gleek alternatives: 4 apps ranked by verified data
Common reasons people leave Gleek: free plan limited to 5 files and 40 objects, and free diagrams are stored only in the browser. We ranked 4 alternatives by how directly each one replaces Gleek, then by reviews, real visits and how recently each app's facts were checked against its own website. Mermaid currently ranks first.
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Show all 4 alternativesThe best Gleek alternative for…
The highest-ranked app in this list for each need.
Best Gleek alternative for most people
MermaidFree and open source, with diagrams that render natively on GitHub.
Best Gleek alternative for a free plan you can upgrade
dbdiagram.ioSpecialised text-to-ERD tool if database diagrams are your main use.
Best Gleek alternative for open source
D2Open-source diagram language with an offline CLI and polished output.
Best Gleek alternative for self-hosting
MermaidFree and open source, with diagrams that render natively on GitHub.
Best Gleek alternative for working in the browser
MermaidFree and open source, with diagrams that render natively on GitHub.
Gleek alternatives: common questions
What is the best alternative to Gleek?
Mermaid ranks first right now. Free and open source, with diagrams that render natively on GitHub. PlantUML and dbdiagram.io follow it in our ranking.
Is there a free alternative to Gleek?
Yes. Mermaid (open source), PlantUML (open source), dbdiagram.io (free plan + paid) and D2 (open source) have a free option. Check each app's verified facts for current plan limits.
Is there an open-source alternative to Gleek?
Yes: Mermaid, PlantUML and D2. Mermaid and PlantUML can also be self-hosted.
Which Gleek alternatives work on Linux?
PlantUML and D2 run on Linux.
Why do people switch from Gleek?
The complaints we hear most: free plan limited to 5 files and 40 objects; free diagrams are stored only in the browser; smaller community and fewer integrations.
How is this list ranked?
Every app is scored with the same published formula: how directly it replaces Gleek, reviews (weighted by verification), visits from AppBreakup, how recently its facts were checked against its own website, and reader votes.