Founder of a listed tool
Anthony Casalena
Founder, Squarespace, named behind the Acuity Scheduling API listing on Anchor Terminal.
What Anthony builds
Acuity Scheduling API E · Calendars & scheduling
Acuity Scheduling is Squarespace's appointment booking product. Its REST API reads availability, creates, reschedules and cancels appointments, manages clients and blocked time, and sends webhooks, with Basic authentication or OAuth2.
Founder, Squarespace, researched 28 October 2026 · the people behind it
Works with
- Kurt Freytag VP of Product, Acuity Scheduling
Backed by
Questions
Who is Anthony Casalena?
Anthony Casalena founded Squarespace in 2003 while a student at the University of Maryland, College Park, and launched it as a website builder in January 2004. He was its only developer and employee in its early years. Squarespace bought Acuity Scheduling in April 2019.
What does Squarespace make?
Anchor Terminal lists Acuity Scheduling API from Squarespace. Acuity Scheduling is Squarespace's appointment booking product. Its REST API reads availability, creates, reschedules and cancels appointments, manages clients and blocked time, and sends webhooks, with Basic authentication or OAuth2.
Who has invested in Squarespace?
The sources our research read name Accel and General Atlantic.
How are Anthony's tools graded?
Acuity Scheduling API is graded E, 42.5 out of 100, on Anchor Terminal's benchmark, which scores every listing against the same checklist.
Sources (9)
- https://www.google.com/search?q=Acuity+Scheduling+head+product+2026+LinkedIn
- https://www.linkedin.com/in/kfreytag
- https://acuityscheduling.com/
- https://acuityscheduling.com/about
- https://developers.acuityscheduling.com/
- https://developers.acuityscheduling.com/docs/support
- https://help.acuityscheduling.com/
- https://en.wikipedia.org/wiki/Squarespace
- https://newsroom.squarespace.com/blog/acuity-scheduling-the-online-appointment-scheduling-platform-joins-squarespace
These are the people building the tools we list, named for their public role in the company or project behind a listing, from public pages, with the date it was researched. They don't work for Anchor Terminal (our own team is on the about page). We show public roles, public profiles and what the listing pages show, nothing private. To correct something, send an about or a photo, or have a page removed, write to privacy@anchorterminal.com.