Hi HN, I'm Vladimir Baranov — a builder of a tool called CalOverlap.

CalOverlap helps you find overlapping availability across multiple calendar links, like Calendly and Cal.com. It’s for those painful group scheduling moments when everyone says "here’s my link", and somehow none of them align. Instead of emailing back and forth or opening 6 tabs, you just paste in the links, and CalOverlap returns top overlapping time slots.

Here’s a demo with four links to show you how it works: https://caloverlap.com/ and instructions - https://www.loom.com/share/e1a34f8dd8674c10bdc29733c7e61724?...

This came out of a pattern I kept seeing in my coaching work with groups of founders and execs. Smart, busy people who all had scheduling links—yet still couldn’t book a meeting. The problem wasn’t lack of availability. It was lack of overlap visibility. Each person’s tool was doing its job, but nobody was coordinating across tools.

The current MVP supports both Calendly and Cal.com, with more platforms on the roadmap. It works entirely client-side—no signups, no tracking, just a quick way to see what works for everyone.

Why I built it

I've spent most of my life shipping software, coaching technical leaders, and wrangling calendars across companies and continents. I’ve built and exited startups in fintech and space-tech, but this project is refreshingly small and specific. It’s not trying to change the world. It’s trying to make scheduling less terrible.

There are other solutions—multi-scheduling apps, internal coordination tools—but they’re often overkill for the "let’s just book one call" use case. I wanted something so simple it felt like a shared calculator for time.

What’s next

Support for more calendar tools (e.g., SavvyCal, Cron, Outlook, Google)

A simple API version (some folks already asked to embed it into ops workflows)

I’d love feedback on the UX, edge cases, or other use cases you’d want this to handle. And if you’ve ever felt like scheduling is a tax on your soul, I’d love to hear that too :)

Thanks for checking it out.

—Vladimir https://caloverlap.com

Show HN: CalOverlap – Group Scheduling from Multiple Calendly/Cal.com Links