OpenCal
Your free time from all your calendars, on one link
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This is 1 of 96 launches in time zones, clocks, and scheduling tools — see how it stacks up on momentum and crowding →
231 other launches read as similar to this one →
Details
- External ID
- 1273689
- Source
- PH
- Company
- —
- Product
- OpenCal
- Website domain
- producthunt.com
- Launched
- Oct. 9, 2026
- Cohort
- —
- Upvotes
- 1
- Upvotes percentile
- 0.3259180348414588
- Tags
- Productivity, Meetings, Calendar
- Fetched at
- Oct. 9, 2026, 5 p.m.
- Updated at
- Oct. 9, 2026, 5 p.m.
Description
OpenCal gives you one link that shows free time across Google Calendar, Outlook, iCloud and Teams. Visitors see when you are free for up to 90 days ahead, but they never see your events. Most companies block outside apps from reading company Teams calendars. OpenCal reads your Teams week from your screen when you press Read from screen and pick the window. The screenshot never leaves your browser. OpenCal stores only encrypted busy times. OpenCal is free.
Enrichment
- Niche
- time zones, clocks, and scheduling tools
- Vertical
- Horizontal
- Function
- Workflow automation
- Audience
- Prosumer
- AI stance
- Not AI
- Project type
- Commercial product
- Normalized one-liner
- unified calendar availability link for professionals
- Manually corrected
- False
Could you build this?
Partial While standard OAuth integrations with Google Calendar and iCloud are easy, aggregating availability across locked-down corporate enterprise Teams/Outlook tenants often requires tricky headless sync or local browser extension workarounds.
What it would actually take: A full version requires a web application (Next.js/Node) managing multi-provider calendar OAuth tokens and a unified free-busy aggregation engine. The hard technical hurdle is bypassing restricted corporate Exchange/Teams policies, requiring either local helper extensions or client-side screen-scraping/session token extractors to pull calendar state without IT admin approval. Building this reliably without getting blocked by Microsoft enterprise security policies requires reverse-engineering private endpoints and maintaining brittle sync adapters.
Competitors
Other products that read as similar to this one — 231 launches clear the similarity bar, closest 8 shown.
Attention rank: #115 of 232 (itself plus its competitors, highest first — normalized so YC and Product Hunt are compared fairly).
Launched 309 days after the earliest competitor.
- OpenSlot · ph · 2026-09-10 · 1 upvotes · similarity 0.56
- SyncMyDay · ph · 2026-10-06 · 2 upvotes · similarity 0.54
- GCal Cleaner · ph · 2026-10-02 · 1 upvotes · similarity 0.51
- Dial • Time Tracker · ph · 2026-09-29 · 1 upvotes · similarity 0.50
- Free activity calendar for schools, sports clubs, and organizations · hn · 2026-05-29 · 9 upvotes · similarity 0.48
- DOFOTT · ph · 2026-09-28 · 48 upvotes · similarity 0.48
- Timely · ph · 2026-07-17 · 176 upvotes · similarity 0.47
- Calenoo · ph · 2026-10-08 · 8 upvotes · similarity 0.47