複数Googleアカウント向けスケジューリングツール5選（2026年）
· Norimitsu Shida · Kiruck Inc.
要点
(1) Tenbin — multi-account FreeBusy aggregation and booking (up to 10 accounts; $10/mo + $3/account). (2) CalendarBridge — sync-first with scheduling pages (from ~$4/mo). (3) OneCal — multi-provider sync (from ~$5/mo). (4) Calendly — market leader; one primary identity per account (free tier; paid from ~$12/mo). (5) Manual + sharing — $0 but does not scale. Choose based on provider mix and whether booking or unified view is primary.
How we evaluated these tools
Criteria: number of Google identities supported, how cross-account availability is computed, booking links, privacy (event copy vs free/busy), pricing at 5+ accounts, guest controls, languages.
1. Tenbin — best for multi-account booking links
Strength: native FreeBusy across up to 10 Google accounts without copying event bodies for availability. Pricing: $10/month includes 2 accounts; +$3 per additional. Unique: built for fractional and AI-sales workflows; 5-language booking. Best for: operators who live in multiple Google Workspace tenants.
2. CalendarBridge — sync + scheduling
Strength: multi-directional sync across Google, Outlook, iCloud; scheduling add-ons. Tradeoff: sync implies copied event data. From ~$4/month — verify current pricing. See /blog/tenbin-vs-calendarbridge.
3. OneCal — multi-provider unified view
Strength: Google + Outlook + iCloud; pricing tiers up to ~$30/month for unlimited on some plans. Booking is secondary to sync for many users. See /blog/tenbin-vs-onecal.
4. Calendly — best for single-company scheduling
Strength: integrations (CRM, video), team features. Limitation: one email identity per Calendly account — multi-company users often need multiple subscriptions. See /blog/tenbin-vs-calendly.
5. Manual + Google Calendar sharing — free but limited
No unified booking link; conflict prevention is manual. Fine for two accounts and very low volume only.
| Feature | Tenbin | CalendarBridge | OneCal | Calendly | Manual |
|---|---|---|---|---|---|
| Google accounts | 10 | 4/page (product dependent) | Via sync | 1 per account | N/A |
| Cross-account availability | FreeBusy | Sync | Sync | Sub-calendars in one acct | Manual |
| Event data copied | No (availability) | Yes | Yes | N/A | N/A |
| Booking link | Yes | Yes | Yes | Yes | No |
| Guest reschedule | All plans (product) | Limited | Undocumented | Paid tiers | No |
| Languages (booking) | 5 | EN-heavy | EN-heavy | Broad | N/A |
| Starting price | $10/mo | ~$4/mo | ~$5/mo | Free / ~$12+ | $0 |
FAQ
Tenbin is Google-native and avoids sync overhead when your goal is merged availability for booking.