Free Calendly alternatives are easy to find. Working out which ones stay free once you use them for real work is harder. Every tool in this post has a free option, except Microsoft Bookings, which comes inside a Microsoft 365 subscription somebody is already paying for. The question worth asking is where that free option stops, because it does stop, and it tends to stop in the same four places.
The four questions that decide whether free is free
How many booking links do you get? One is fine until you want a 20 minute intro call and a 60 minute working session with different hours.
How many calendar accounts does it check before it offers a time? This is the one that does real damage. If the tool reads your work calendar only, your Saturday morning is still bookable by a stranger.
Is a team page included? A page where a colleague can take the booking instead of you is usually the first thing behind a wall.
Does it send reminders? Nobody misses reminders until the no-shows start.
Everything below is sorted by those four questions. Where another tool is the better pick, it says so.
Calendly's free plan is the baseline
Start with the thing you are replacing. Calendly's free plan lists one event type, one calendar connection, one-on-one scheduling, a customizable booking page and the browser extension. Unlimited event types, multiple calendar connections and automated reminders are listed on the Standard plan, and round-robin and team scheduling on the Teams plan.
The calendar count is the part that surprises people. Calendly checks the calendars you connect so you are not double booked, and how many accounts you can connect depends on your plan, between one and six per user. On one connection that means one account: a work Google account or a personal one, not both.
There is an official workaround. Calendly's help center suggests sharing your other calendars into the one you connected, with read and write access, so those events are visible. It works. It also means granting read and write access from one calendar to the other, which is more sharing than some people want, and it moves events only. It does not add a booking page either, because the free plan still lists one event type.
Calendly does let you name events you are happy to be booked over, so a focus block or a personal event on a connected calendar does not have to cost you the slot.
For the rest of the detail, we wrote up the Calendly free plan limits, and WhenNOT vs Calendly is the sourced side by side table.
Cal.com
Cal.com's free plan is for one user and lists unlimited event types and calendars, email and SMS notifications, integrations with more than 100 apps, a mobile app and a browser extension. Its feature table lists unlimited calendar connections, to sync availability and prevent double bookings. For a solo freelancer with a work calendar and a personal one, that is a genuinely free answer to questions one and two, and the free plan does list email and SMS notifications.
Question three is the wall. One team with shared availability, round-robin scheduling and managed or collective event types are listed on the Teams plan.
Self-hosting deserves a note, because it is one of the reasons people pick Cal.com. In April 2026 Cal.com moved its production codebase from a public repository to a private one, and the public repository became Cal.diy, the open-source, self-hostable, community-driven version. Organizations and teams and the automated workflow engine, among other commercial features, were removed from it. Self-hosting is still real; it is just not the same codebase as the hosted product.
Pick Cal.com if you are one person who wants a lot of event types, or if you want to run your own instance. WhenNOT vs Cal.com covers the rest.
Microsoft Bookings
Microsoft Bookings is a Microsoft 365 app for scheduling and managing appointments. It does not stand on its own: it is not available as a standalone app, and Outlook on the web has to be enabled to use it. So it is free in the sense that it already sits inside a subscription somebody is paying for.
What you get is solid. A booking made on the self-service page triggers a confirmation and a reminder email. Staff can be added with any email address and still get the confirmation and the calendar invite, although each staff member has to share their calendar before Bookings can sync it.
Two things to know before you call it a drop-in replacement. When customers cannot pick a person, staff are assigned randomly out of whoever is available at the time of booking, and there is no way to ensure equal distribution of those appointments across the staff. There is also no payment support in Bookings.
Pick Microsoft Bookings if your whole organization is already on Microsoft 365 and your scheduling lives inside it.
Google Calendar appointment schedules
With a personal Google Account or a Workspace Business Starter plan, you can create a single booking page so others can schedule appointments on your calendar. Single is the operative word. Creating more than one appointment schedule, sending automatic email reminders and checking availability across multiple calendars are listed as the premium features, and some features require an eligible Google Workspace or Google One subscription.
That third one is question two again. To check availability from secondary calendars you need an eligible Google Workspace or Google One plan, and the calendars in question are your primary calendar and any calendars you own, manage or are subscribed to in Google Calendar.
Pick Google appointment schedules if you live entirely in Google, need exactly one page, and do not need reminder emails.
Where WhenNOT lands
WhenNOT is free. Not a free tier underneath a paid one: booking pages, group polls, every calendar connection, the Slack app and the ChatGPT and Claude connectors, with no plan, no trial and no ads.
On the four questions:
- Links: any number of booking pages per host.
- Calendars: before your page offers a time, it reads every Google and Microsoft account you connect. Busy means the calendar's own busy flag, so events marked free, working location entries and declined invites do not block a slot. If you would rather be strict, you can choose to treat free events as busy.
- Teams: a page can have several hosts. You choose whether any free host can take the booking or all hosts must be free, and the guest is always told who they got. That is not rotation. If you specifically need load balancing, read what round-robin scheduling actually means first, because WhenNOT does not do it.
- Reminders: 24 hours, 1 hour and 10 minutes before the meeting, for everyone, included.
Then the parts that keep the day from falling apart: weekly hours with several windows a day, one-off date overrides, buffer time between meetings, a minimum notice and a booking horizon. Guests reschedule or cancel from their confirmation. You never move a guest by force; you send a request with up to five proposed times and they pick one. Google Workspace calendars add a Meet link and Microsoft 365 work calendars add a Teams link, while personal Gmail and Outlook.com calendars send the invite without a video link.
A worked example: one consultant, two calendars
You are a consultant. Work lives in Microsoft 365, the rest of life lives in a personal Gmail account. One booking page, both accounts connected, a 15 minute buffer and four hours of minimum notice.
Thursday, November 12, 2026 looks like this. The Microsoft calendar has a client workshop from 10:00 to 11:00 and an all-day working from home entry. The Gmail calendar has a dentist appointment at 15:30, marked busy.
Your page offers nothing between 09:45 and 11:15, because of the workshop and its buffers. It offers nothing around the dentist either, even though that conflict sits on a personal account the client never sees. The working from home entry blocks nothing, because the calendar does not mark it busy. And a client who opens the link at 08:00 cannot grab 11:15 the same morning, because of the minimum notice.
That is the whole feature. One link, both calendars, no "sorry, something came up" email afterwards. If you are coming at this from the conflict side, stop double booking your work and personal calendar walks through the setup.
Which one to pick
- One meeting type, one calendar, no reminders: Calendly's free plan does that.
- Whole organization on Microsoft 365: Microsoft Bookings, included with the Office 365 and Microsoft 365 business, enterprise and education subscriptions it lists.
- Everything in Google, one page, no reminders: Google appointment schedules.
- One person, many event types, or you want to self-host: Cal.com.
- Several calendar accounts checked for conflicts, several pages, a team page and reminders, with no plan involved: WhenNOT.
FAQ
Can I check two calendars for conflicts for free?
It depends on the tool. Calendly connects between one and six calendar accounts per user depending on the plan. Google needs an eligible Workspace or Google One plan to check secondary calendars. Cal.com's free plan lists unlimited calendar connections. WhenNOT reads every Google and Microsoft account you connect, free.
Do free booking pages send reminder emails?
Not always. Calendly lists automations and reminders on its Standard plan, and Google lists automatic email reminders among its premium features. Microsoft Bookings triggers a confirmation and a reminder email when a booking is made. WhenNOT sends reminders 24 hours, 1 hour and 10 minutes before.
Is there a free team booking page?
Calendly lists round-robin and team scheduling on its Teams plan, and Cal.com lists one team with shared availability on its Teams plan. WhenNOT puts several hosts on one page at no cost, with the rule set to any free host or all hosts, which is not round-robin.
What if I need a date for a group, not a booking?
Different problem, different tool. A booking page is for one person booking time with you. A group scheduling poll is for finding the one day six people can all make.
Get a free booking page that checks every calendar you connect before it offers a time.