TrefioTrefio
Built for reliability, not just convenience

Scheduling you can actually trust.

Trefio is built for professionals and teams who depend on accurate availability, clean workflows, and predictable bookings.

Free to start. No credit card required.

Reliable calendar sync across providers. With visible sync status.

Conflict detection when external events overlap bookings.

Unified calendar view with filtering across connected calendars.

February 2026
3 calendars synced
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Google Calendar
Outlook
Apple Calendar

The real problem

Scheduling breaks whenreal life happens.

Most scheduling tools assume a perfect world. But calendars change, syncs lag, and the chaos adds up.

Syncs that silently fail

Your calendar app says it's connected. But changes stop syncing and you find out when it's too late.

Double bookings slip through

Someone books a slot that looks free but isn't. Your external calendar wasn't reflected in time.

External changes go unnoticed

A client reschedules on their end. Your booking system has no idea. Conflicts pile up.

No visibility into what's happening

Is it syncing? When did it last sync? What failed? Most tools don't tell you.

What makes Trefio different

Scheduling that worksthe way it should.

Built from the ground up to handle the complexity of real calendars, real conflicts, and real consequences.

Reliable calendar sync

Not just a connection

Real sync with visible status. Know when it last ran, what changed, and if something failed. No more wondering.

Conflict awareness

By design

Know when external events overlap bookings. Get alerts before double bookings happen, not after.

Unified calendar view

With smart filtering

See all connected calendars in one place. Filter by calendar, event type, or date range. Your schedule, organized.

Professional workflows

Built for consequences

Designed for people whose time matters. Clean booking flows, clear confirmations, and audit-friendly behavior.

Security and trust

Built for trust.
Not just convenience.

When your business depends on accurate scheduling, you need tools that are transparent about what they do.

OAuth connections with secure token handling

We never see your calendar password. OAuth tokens are encrypted at rest and in transit.

Visible sync status and error states

Always know what's happening. See when syncs run, what changed, and if anything failed.

Audit-friendly behavior

Changes are surfaced, not hidden. Know exactly what Trefio did and when it did it.

Designed to reduce booking chaos

Conflict detection, deletion alerts, and clear status indicators. Prevention over damage control.

Sync Status

All healthy

Google Calendar

12 events synced

Synced

2 min ago

Outlook

8 events synced

Synced

5 min ago

Apple Calendar

4 events synced

Synced

3 min ago

Last full sync: Today at 10:42 AMNo conflicts detected

Early Access

Be first in line

We're building Trefio to solve real scheduling problems. Join the waitlist to get early access and help us shape the product.

Early access before public launch
Shape the product with your feedback
Priority support during beta

Free to join. We'll only email you about early access.

Stop fighting your calendar.

Start with scheduling you can actually trust. Free to try, no credit card required.

Reliable sync
Conflict detection
Unified view
Get started free