SyncDate alternative: Keeper.sh vs SyncDate

Keeper.sh is the SyncDate alternative when you want unlimited calendars for half the price of SyncDate Plus, or copies that hide the event's title, description and location unless you turn them on. SyncDate Plus is $10 a month billed yearly for 5 accounts (SyncDate pricing, checked 10 November 2026). Both products have a free plan, and both sync Google Calendar, Outlook, iCloud and CalDAV servers.

Keeper.sh is a calendar sync service that copies events between Google Calendar, Outlook, iCloud, Fastmail and any CalDAV server, so every calendar shows you as busy at the same times. It is free for 2 calendar accounts and 3 connections, and Pro is $5 a month for unlimited calendars.

Keeper.sh and SyncDate side by side

The table puts the free plans, entry prices, connected calendars, update speeds, copy defaults and trials side by side, and links each SyncDate figure to its source (checked 10 November 2026).

What does each one cost?

On Keeper.sh, Free covers 2 calendar accounts and 3 connections. Pro is $5 a month or $45 a year for unlimited calendars, priced per person with no seats and no higher tier (pricing). A Keeper.sh account is one signed-in calendar service, however many calendars it holds.

SyncDate's Free plan covers 2 accounts, 2 calendars and 1 sync, copies 30 days ahead, and has no time limit. Plus is $119.99 a year, which is $10 a month, for 5 accounts, 5 syncs and 20 calendars, copying one year ahead. Pro is $219.99 a year, which is $18.33 a month, for 20 accounts, 20 syncs and 100 calendars with no date limit. Plus and Pro each have a 7-day trial that needs a card. A Team plan puts every member on one subscription and one invoice (SyncDate pricing).

Keeper.sh copies events from one month back to two years ahead by default on both plans, and Pro can set that range anywhere from 1 week to 2 years. Sign-up needs no card: create a Keeper.sh account.

What does a copied event show?

Keeper.sh hides event details unless you turn them on. Each copy is a busy block named after the source calendar. The title, description and location are hidden by default, Pro can turn them back on per calendar, and guest lists are never copied. The calendar sync features page lists the other settings a connection has.

SyncDate lets you set a copy's title to "Busy, the real title, your text in front of it, or Custom", and choose whether its description and location are carried over. Its features page says "Copies carry no attendees by default" (SyncDate features, checked 10 November 2026). Rules that change what a copy says by event length, start time, weekday or guest email domain need Plus.

How fast does a change reach the other calendar?

On Pro, Google and Outlook changes land within seconds, and iCloud, Fastmail and CalDAV changes land every minute. On Free, changes land every 30 minutes.

SyncDate's features page says Google and Outlook changes arrive "Usually in under a minute", that iCloud and CalDAV calendars are checked about every 15 minutes, and that every plan syncs at the same speed (SyncDate features).

Which calendars does each one connect?

SyncDate connects Google Calendar, Outlook and Office 365, iCloud and any CalDAV server, with Fastmail and Nextcloud named, and syncs them both ways or one way. Feeds and ICS links sync one way, into one of your calendars (SyncDate features).

Keeper.sh connects Google Calendar, Outlook, iCloud, Fastmail and any CalDAV server, and reads and writes all five. It takes an .ics link as a read-only source. Each connection runs one way, so two-way sync is two connections. A two-way pair uses 2 accounts and 2 connections, which fits the Free plan with one connection spare.

What do the MCP servers cover?

Keeper.sh runs an MCP server at https://www.keeper.sh/mcp on both plans. An assistant such as Claude can use it to read and change events, answer invitations, find free time, and set up connections and shareable calendar links. It signs in through OAuth 2.1 with a consent screen and needs no API key. On Free, the MCP server and the REST API share 25 calls a day, and Pro has no daily cap. The Keeper.sh MCP server documentation lists every tool.

SyncDate's MCP page (checked 10 November 2026) lists 54 tools across two servers. Seven of them, in the Calendar Hub MCP on Plus and above, work with calendar events directly: list_calendars, list_events, get_event, find_free_time, create_event, update_event and delete_event. The rest are in the Platform MCP on every plan, and cover sync setup, account and team administration, billing and support.

What SyncDate offers

• Two-way sync as one setup: a single sync keeps two calendars matched in both directions.
• Rules on paid plans: a copy's title and privacy can depend on the event's length, start time, weekday or guest email domain, which suits people who want client meetings and internal meetings to appear differently.
• A Team plan: every member gets Pro access under one company subscription and one invoice.
• A published DPA: SyncDate's Data Processing Agreement (checked 10 November 2026) is part of its terms and includes its subprocessor list, which matters to businesses that need one on file.
• Administration through MCP: its Platform MCP lets an assistant manage syncs, accounts, teams and support tickets.

When Keeper.sh fits

• Price: you want unlimited accounts and connections for $5 a month.
• Free plan: you need a two-way pair plus one more connection, or events copied more than 30 days ahead, without paying.
• Privacy: you want copies to arrive as busy blocks with details hidden, with nothing to set.
• iCloud, Fastmail and CalDAV speed: you want changes on those calendars copied every minute, which is the Pro schedule.

Step-by-step setup is in how to sync Google Calendar and Outlook and how to sync two Google Calendars.

Common questions about Keeper.sh and SyncDate

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