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Calendly

Automate scheduling with a simple, shareable booking page.

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MIT

Open the official app on calendly.com

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What's next with Calendly?

Choose how you want to get started.

Use it free

Open the official tool or demo — no account needed.

Free

Self-host it

Run the open-source version on your own infrastructure.

Open

What is Calendly?

Calendly is a web-based appointment scheduling tool designed to simplify the process of coordinating meeting times between individuals and organizations. It addresses the common challenge of scheduling conflicts by allowing users to share their availability and let others book time slots that fit their schedules. The platform is used by a wide range of users, from freelancers and small business owners to large enterprises, including 86% of Fortune 500 companies. Calendly eliminates the back-and-forth email exchanges typically required for scheduling by providing a visual calendar interface where users can select available time slots. This tool is particularly beneficial for professionals who need to manage multiple appointments across different time zones and calendar systems. By integrating with popular calendar services like Google, Microsoft Outlook, and Exchange, Calendly enables real-time synchronization of availability. Users can set specific availability windows, such as 9:00 am to 4:30 pm on weekdays, and customize these settings to reflect their working hours. This ensures that invitees are always informed of the user's availability, reducing the chances of scheduling conflicts. The tool also supports various meeting types, including one-on-one sessions and group meetings, making it versatile for different professional and personal needs.

How it works

Calendly is built using JavaScript, HTML, and CSS for the front end, with backend services likely utilizing Node.js or similar technologies. It relies on APIs from Google, Microsoft, and Exchange for calendar synchronization. Calendly supports major web browsers including Chrome, Firefox, Safari, and Edge. Data flows through the Calendly servers, where it is processed and synchronized with the user's calendar. Privacy is managed through secure API connections and user authentication, ensuring that calendar data is protected while allowing for necessary access for scheduling purposes.

How to use it

  1. 1Sign up for a free account on Calendly's website. 2. Connect your calendar by authorizing access to Google, Microsoft Outlook, or Exchange. 3. Set your availability by defining specific time windows for meetings. 4. Customize event types and meeting preferences, such as video conferencing tools or in-person meeting settings. Practical tips include setting up recurring availability for regular clients, using time zone settings to accommodate international clients, and regularly reviewing and updating calendar permissions to ensure security.

What it can do

  • meeting scheduler

Use cases

Assumptions and limitations

Assumptions

  • source: https://calendly.com/
  • license: Proprietary — free to use
  • privacy: Opens an external demo

Understanding the result

Automate scheduling with a simple, shareable booking page.

Tool details

  • Clearly flagged when a network request is needed.
  • No account, no sign-up, and no tracking of your content.
  • Powered by (MIT).
Built with
(https://calendly.com/)
License
MIT
Runs locally
No — requires a network request
Verification
Not yet verified
Input
Query
Output
Text
Open-source source & license

Built with https://calendly.com/. OpenToolVault provides the discovery and browser interface while crediting the original project maintainers.

Built with
License
MIT
View source on GitHub

Open-source project

OpenToolVault is an independent directory. We are not affiliated with or endorsed by this project.

References

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