Compare
cal.diy vs onyx
cal.diy and onyx share 7 technologies: Next.js, React, Postgres, Redis, Sentry, PostHog, and Stripe. cal.diy is written in TypeScript and onyx in Python.
What they share and what sets them apart
calcom
cal.diy
Scheduling infrastructure for absolutely everyone.
TypeScript49.6kRead on October 30, 2026, at commit 2e41247What is cal.diy built with?onyx-dot-app
onyx
Open Source AI Platform - AI Chat with advanced features that works with every LLM
Python33.1kRead on November 1, 2026, at commit 3eb6420What is onyx built with?In common
Only in cal.diy
Only in onyx
Side by side
cal.diyonyx
SizeLines written by people and agents, without generated ones; code files, without tests.
cal.diy554,284 lines written4,310 code files
onyx1,580,032 lines written4,036 code files
Who writes itA commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
cal.diy6.3% of its commits signed by AIWith Devin, Claude Code, CodeRabbit, Cursor, and GitHub Copilot
onyx11.6% of its commits signed by AIWith Claude Code, Devin, Cursor, CodeRabbit, GitHub Copilot, and Sweep
ActivityFrom GitHub and its history, on the day SeeRepo read it.
cal.diyLast push October 29, 202616,062 commits49,552 stars
onyxLast push November 1, 202611,257 commits33,146 stars
TestsThe files that test the code, and the share of code files a test imports.
cal.diy642 test files14.8% of its code files have a test that imports them
onyx3,061 test files43.4% of its code files have a test that imports them
Frequently asked questions
Which is bigger, cal.diy or onyx?
onyx, with 1,580,032 lines written in 4,036 code files; cal.diy has 554,284 in 4,310.
The proof: onyx-dot-app/onyx's code at commit 3eb6420
Which has more GitHub stars, cal.diy or onyx?
cal.diy, with 49,552 stars; onyx has 33,146.
The proof: calcom/cal.diy on GitHub
Which has more tests, cal.diy or onyx?
onyx, with 3,061 test files; cal.diy has 642.
The proof: onyx-dot-app/onyx's code at commit 3eb6420
Which was updated more recently, cal.diy or onyx?
onyx: its last push was on November 1, 2026, and cal.diy's on October 29, 2026.
The proof: onyx-dot-app/onyx's commits on GitHub
Which has more commits signed by AI, cal.diy or onyx?
onyx: an AI signed 11.6% of its commits, with Claude Code, Devin, Cursor, CodeRabbit, GitHub Copilot, and Sweep; in cal.diy, 6.3%.
The proof: the commits each tool signed in onyx-dot-app/onyx
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