SyncGene alternative: Keeper.sh vs SyncGene

SyncGene syncs calendars, contacts and tasks between Google, iCloud, Office 365, Outlook.com and Exchange accounts. Keeper.sh is the SyncGene alternative for calendar sync that runs unattended on a free plan: Keeper.sh's Free plan copies changes every 30 minutes, and SyncGene's free plan allows one manual sync a month. 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.

The table compares the two on plans, calendars, speed and what a synced event shows, and links each SyncGene figure to the SyncGene page it comes from.

Which calendars each one connects

SyncGene connects "iCloud, Google Calendar, Gmail Contacts and Tasks, Outlook.com/Hotmail, Office 365 and Microsoft Exchange accounts" (SyncGene). Its free plan connects 2 accounts, and its FAQ says free accounts can "synchronize only one Calendar and Contacts folder/group" and that "the number of calendars to share and accept is limited to one per account" (SyncGene FAQ). Existing Premium accounts sync up to 5 sources by default (SyncGene pricing).

Keeper.sh connects Google Calendar, Outlook (Microsoft 365 and Outlook.com), iCloud, Fastmail and any CalDAV server, which covers Nextcloud, Radicale and other servers that give you a CalDAV address. It also reads a pasted .ics link as a read-only source. One account can hold any number of calendars, and the Pro plan has no limit on accounts.

How often each one syncs

SyncGene's free plan syncs when you press the button, at most once a month. Its FAQ lists the free limits: "automatic synchronization is disabled" and "manual sync is limited to one time per month" (SyncGene FAQ). A new free account gets a 7-day preview of automatic sync, and existing Premium accounts keep automatic sync on (SyncGene pricing). SyncGene does not publish how often automatic sync runs; its FAQ says the interval can be changed by contacting support.

Keeper.sh syncs on its own schedule on both plans. 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.

What each one costs

SyncGene's pricing page says "New subscriptions now start on CiraHub" and lists CiraHub as "Starting $8 per month (billed yearly)", with a 14-day free trial (SyncGene pricing). The free SyncGene plan is still listed on the same page. Existing Premium accounts are billed yearly, with a full refund within 14 days of purchase; the page did not show the Premium price on 10 November 2026.

Keeper.sh has one paid plan, priced per person. Free covers 2 calendar accounts and 3 connections. Pro is $5 a month or $45 a year for unlimited calendars (pricing).

What a synced event shows

SyncGene's homepage says "Any changes or entries you make in your Contacts, Calendars and Tasks will appear on all your connected devices and services", and it describes merging accounts into "one synced view of one Calendar" (SyncGene). That suits one person who wants the same full calendar on every account.

Keeper.sh writes a copy for availability. 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. That suits a work calendar that colleagues can open: they see that the time is taken, and the personal event's details are not on the work account. Each connection runs one way, so two-way sync is two connections.

What SyncGene offers beyond calendar sync

• Contacts and tasks: SyncGene syncs address books and to-do lists as well as calendars, which matters if you are moving contacts between Google, iCloud and Microsoft accounts.
• Calendar sharing across platforms: you can invite someone on another provider to view or edit a calendar, or create a public link on existing Premium accounts (SyncGene Premium).
• Microsoft Exchange: Exchange accounts are on SyncGene's supported list.
• Phone apps: SyncGene has iOS and Android apps for setup and notifications.
• Backups: SyncGene backs data up to your own Google Drive, iCloud or OneDrive before it syncs, and says it "does not store any personal data on the servers" (SyncGene FAQ).

When Keeper.sh fits

• You want sync to run by itself without paying. A two-way pair uses 2 accounts and 2 connections, which fits the Free plan with one connection spare.
• One of your calendars is on Fastmail, Nextcloud or another CalDAV server. Keeper.sh connects these directly.
• You want busy time shared, not event details. Copies are busy blocks by default, on both plans.
• You have many accounts. Pro has no limit on accounts or connections.
• You want an assistant to manage sync. Keeper.sh has a REST API and an MCP server on both plans; the calendar sync features page lists both.

Create an account at Keeper.sh and the first sync starts when you add a connection (sign up).

Step-by-step setup is in how to sync iCloud Calendar with Outlook and how to sync iCloud and Google Calendar.

Common questions about SyncGene and Keeper.sh

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