SYNCDATE vs LeapSync: Google and Outlook, or Every Calendar

Quick Answer: LeapSync is the better pick if your calendars are only Google and Microsoft 365, one pair mirrored two-way is the whole job, you want a booking page in the same subscription, and a low flat price decides it. SYNCDATE is the better fit when iCloud, Fastmail or another CalDAV calendar has to be a real two-way calendar rather than a read-only feed, when several calendars need to sit in one sync, when a rule should decide what each copy says, when you want a free plan with no clock on it, or when a team needs it on one bill. On both, a new copy shows as Busy (on SYNCDATE, unless it is a two-way Mirror between calendars you own). We make SYNCDATE, so weigh this as our view; LeapSync facts were checked on 19 October 2026 on its own pages.

LeapSync and SYNCDATE both sit in the small category of tools that copy events between calendars you own so that other people see you as busy. LeapSync keeps the job narrow and adds scheduling on top. SYNCDATE keeps the job wide and adds control over the copies. This page compares the two on what each does now, using what LeapSync publishes on its own site on 19 October 2026. Where a page does not say, we say we could not confirm it.

What LeapSync is

LeapSync is two-way calendar sync between Google Calendar and Microsoft 365 or Outlook.com, including personal Microsoft accounts. It runs on Cloudflare's edge, needs no install, and signs you in without a password. Its pages do not name the company behind it, and its terms page would not load for us, so we cannot say who the legal operator is or where it is based.

Each pair is set to two-way, one-way, busy-block or full details, and you can change that at any time. Mirrors say "Busy" by default. Changes on Google and Outlook arrive by push notification, which it describes as "Typically under 5 seconds end-to-end", with a safety sweep every hour. iCloud is not a sync target: LeapSync publishes a private, read-only feed of your Google and Outlook calendars that you subscribe to in Apple Calendar by scanning a QR code. Its FAQ says two-way iCloud and CalDAV sync is "planned for v2".

Since July 2026 it also sells a booking page, a public link where anyone picks a free slot computed across all your connected calendars, and group availability boards, where people paint their free days through a private link without an account. Every plan, including the trial, has one of each.

The trial is 14 days with no card: one pair, Busy blocks only, and only the next 14 days of events. Basic is $4 a month, or $1 a month billed as $12 a year and "locked in forever", for one pair with full details. Pro is $7.95 a month, or $6.25 a month billed as $75 a year, for up to 4 calendars. Team is $6 a seat a month, or $5 billed yearly, with a 3-seat minimum and an admin console. A DPA is listed on the Enterprise tier only.

What SYNCDATE is

SYNCDATE connects Google Calendar and Outlook or Microsoft 365 through their own APIs, the same two providers LeapSync covers, and then keeps going: iCloud, Fastmail, Nextcloud and any other CalDAV server connect as writable calendars, and iCal feeds as one-way sources. A sync holds the calendars you pick and a direction. Push copies one way and never touches the source. Mirror goes both ways, so each calendar gets a copy of the others' events.

New syncs copy events as Busy. A two-way Mirror between calendars you own keeps the real titles. You can change either before you start. Google and Outlook changes usually reach the other calendar in under a minute, because both providers send us a notification; CalDAV calendars are checked about every 15 minutes, and iCal feeds on a schedule.

Between Busy and full details there is a sync screen. Custom text builds the title, description or location from pieces of the original on every plan, and on Plus and up if-this-then-that rules decide the result, such as "10 or more guests, show Busy". On Pro each destination calendar in a sync can have its own rule.

Free covers 2 accounts, 2 calendars and 1 sync with no card and no end date. Plus allows 5 accounts, 5 syncs and 20 calendars; Pro and Team allow 20 accounts, 20 syncs and 100 calendars. Prices are on the pricing page. We have no booking page and no availability board.

Providers: iCloud as a feed, or as a calendar

For a Google calendar and a Microsoft 365 calendar, the two tools cover the same ground, and LeapSync's note that it is built on Microsoft Graph applies to us as well: we connect Outlook through the Graph API, not through Exchange Web Services.

The difference is Apple. In LeapSync your iPhone sees the merged Google and Outlook schedule through a read-only subscription; an event you add in Apple Calendar goes nowhere. In SYNCDATE iCloud is a CalDAV calendar, so it can be one side of a Mirror: add a dentist appointment on your phone and it blocks time on your work calendar. The same goes for Fastmail, Nextcloud, mailbox.org, Posteo and self-hosted servers, and an iCal feed from a school or a booking tool can be a source. If an Apple calendar is where you actually put things, that is the deciding line. We keep a ranked list for the three-provider case as well.

One pair, or several calendars in one sync

LeapSync's trial and Basic plans are one pair of calendars; Pro is "up to 4 calendars", and its pages do not say how four calendars map onto pairs, so we cannot say whether a three-calendar mirror fits.

In SYNCDATE a Mirror holds 2 calendars on Free, 4 on Plus and 5 on Pro, and every calendar in it receives the others' events. A Push can feed up to 10 calendars (Plus) or 20 (Pro) into one calendar you look at. Three client calendars pushing into one working calendar is one sync with four calendars in it. Two separate syncs do not chain, so a three-way mirror goes in one Mirror, not two.

Privacy: both start at Busy

LeapSync's mirrors say "Busy" by default, and you pick full details per pair. On its trial, Busy is the only option; full details start on Basic.

SYNCDATE's new syncs copy events as Busy too. The exception is a two-way Mirror between calendars you own, which keeps the real titles, because there is nobody to hide them from. Between Busy and everything, Custom text can write "[Acme] Busy" on every plan, rules on Plus can show details for some events and Busy for others, and on Pro the same sync can show full titles at home and Busy at work. LeapSync's pages describe the per-pair mode switch and nothing in between.

On storage, LeapSync says it keeps event-ID mappings, change markers and a content hash, not your titles or attendees, with tokens encrypted at rest. We store what a sync needs and encrypt tokens at rest; the detail is on our privacy and security page.

Speed

LeapSync's number is bold: "Typically under 5 seconds end-to-end via push notifications from Google and Microsoft." Its safety sweep runs every hour.

We listen for the same notifications and say Google and Outlook changes usually reach the other calendar in under a minute. Our safety poll runs every 15 minutes on paid plans and every 2 hours on Free; it exists because Google warns that push notifications are not perfectly reliable, and a missed one waits for the next poll. Neither of us publishes a measurement, so we are not going to claim we are faster. What we will say is that the poll behind the webhooks is where a missed change gets caught, and ours is four times more frequent on paid plans than LeapSync's hourly sweep.

Scheduling: they have it, we do not

LeapSync's booking page and availability boards are real features and we have no equivalent. If you want one subscription that both keeps two calendars in step and gives clients a link to book you, LeapSync does that and SYNCDATE does not. We copy events; if you need a scheduling link, you will run a second tool alongside us.

Free plan, trial and teams

LeapSync's free period is a 14-day trial with one pair, Busy blocks only and the next 14 days of events, with no card. After that, Basic is $12 a year on annual billing. SYNCDATE's Free plan is permanent: 2 accounts, 2 calendars, 1 sync, 30 days ahead, no card, and it is not limited to Busy. Plus and Pro start with a 7-day trial that asks for a card up front, and you can cancel inside the 7 days without being charged.

Both have a seat plan. LeapSync's Team is $5 or $6 a seat a month with a 3-seat minimum and an admin console. SYNCDATE's Team plan gives every seat Pro on one bill, with five seats minimum; admins see sync health, never events, and can set how members' syncs copy events.

Where the data lives

LeapSync runs on Cloudflare's global infrastructure and says data "may be processed in countries other than your own"; its DPA is an Enterprise line item. SYNCDATE runs at Hetzner in Germany and Finland, and our Data Processing Agreement is published at syncdate.app/dpa for every plan, including Free. If you need an EU processor or a DPA before you sign up, that is a difference.

Pricing

LeapSync's prices on 19 October 2026: Basic $4 a month or $12 a year for one pair with full details; Pro $7.95 a month or $75 a year for up to 4 calendars; Team $6 a seat a month or $60 a seat a year, 3 seats minimum; Enterprise on request. A 14-day trial with no card.

SYNCDATE has Free, Plus, Pro and Team plans; the current prices and every cap are on the pricing page. Free needs no card. Plus and Pro start with a 7-day trial that asks for a card up front. On price LeapSync is lower, and its annual Basic is very low. What you are paying us for is iCloud and CalDAV as real calendars, several calendars per sync, the rules, a DPA on every plan, and a free plan without a clock. If none of those apply to you, LeapSync is the cheaper answer.

Which should you choose

Choose LeapSync if:

• Your calendars are only Google and Microsoft 365, and an iPhone view of them is enough
• One pair mirrored two-way is the whole job
• You want a booking page or a group availability board in the same subscription
• Price decides it: $12 a year for the annual Basic plan

Choose SYNCDATE if:

• An iCloud, Fastmail, Nextcloud or other CalDAV calendar must be a real two-way calendar, not a feed
• Three or more calendars should show each other's events in one sync
• Some copies should say more than Busy and some less, and a rule should decide which
• Each destination in the same sync should show a different level of detail (Pro)
• You want a free plan without a 14-day clock, a DPA on every plan, an EU processor, or copies removed for you when a sync goes

If you are weighing other tools too, see SYNCDATE vs Hetk, SYNCDATE vs 2calendars and the calendar sync tool comparison.

Moving from LeapSync

Set up the SYNCDATE sync first and check that copies land as you expect. Then cancel the LeapSync pair. Its FAQ says the mirror events it created remain in your calendar and that you can keep, delete or hide them, so delete them by hand before the new sync runs, or you will see two blocks for every event until you do. Two tools writing to the same calendar will produce duplicates in the meantime.

Before you start, compare the plans on the pricing page: Free covers one two-calendar sync, and the 7-day Plus trial covers up to 4 calendars in one Mirror.