Managed hosting from
£25/month +VAT
Small resource profile: 1 vCPU, 2 GB RAM, 10 GB SSD storage. Typically suits teams handling hundreds of bookings a month. Deployment, upgrades, daily backups, monitoring, SSL and UK hosting included, with no per-user fees. How our pricing works
Scheduling on your domain, not someone else's
Calendly turned "find a time" into a link, then turned the link into a per-seat subscription with your meetings routed through its cloud. Cal.com is the open source alternative: booking pages, availability rules, round-robin and team scheduling, running on your own domain and your own infrastructure, with no per-seat fees. Node deploys, manages and supports Cal.com as a production service hosted in the UK.
What Cal.com is
Cal.com is a scheduling platform. Each person or team publishes booking pages with event types they define: a 15-minute intro call, a 60-minute consultation, a demo with the sales team. Availability rules, buffers and minimum notice keep calendars sane, invitees pick a slot that works, and the booking lands in everyone's calendar with a video link attached.
One thing worth knowing: in 2026 Cal.com moved its flagship product to a commercial licence. The open source path continues as the MIT-licensed community edition, published as Cal.diy, and that is the self-hostable version Node deploys and manages, so the freedoms this page describes still hold for your deployment.
It connects to the calendars your business already uses, including Google Calendar and Microsoft Outlook, checking real availability before offering slots. Video conferencing integrations generate meeting links automatically, workflows send reminders and follow-ups, and an API and embeds let you put booking directly into your website and product.
Because the community edition is open source and self-hostable, the whole scheduling layer can run under your brand on infrastructure you control. Booking pages live on your domain, and the details of who is meeting whom stay in your hands.
Why self-hosted Cal.com instead of Calendly
No per-seat fees: Calendly charges per user per month for team features, at the time of writing around 10 to 16 US dollars a seat, so rolling scheduling out across a company carries a permanent bill. Self-hosted Cal.com has no per-user licence: every member of staff gets a booking page for the same flat managed fee.
Your domain and your brand: bookings happen at your address, not on a calendly.com URL. For client-facing teams, the booking page is often the first interaction a prospect has with you, and it should look like you.
UK data residency: booking data reveals who your clients are, who they meet and when. Self-hosted Cal.com keeps attendee details and connected calendar credentials on UK infrastructure under an Article 28 data processing agreement.
No feature gating: round-robin, collective events, routing and workflows are features of the platform, not rungs on a subscription ladder.
No lock-in: your event types, bookings and history live in a database you own. If you ever leave, you take everything with you.
Round-robin and team scheduling
Cal.com's team features are where it earns its place in a business rather than a freelancer's toolkit. Round-robin event types distribute inbound bookings fairly across a sales or support team, respecting each person's availability. Collective events find a slot that works for every required host, so a demo with an engineer and an account manager books itself. Routing can send an invitee to the right person or team based on their answers before they ever see a calendar. The result is that "book a call" on your website becomes a genuinely automated front door, not a shared inbox problem.
Booking built into your website and product
Because you self-host, embedding is first class. Booking pages and inline widgets sit directly in your site, the API lets your systems create and manage bookings programmatically, and webhooks notify other tools the moment a booking is made or cancelled. We pair Cal.com with n8n workflow automation so a new booking can create a CRM record, raise a ticket or kick off an onboarding sequence automatically.
Keycloak and single sign-on
Every application in a Node tenant joins your own Keycloak realm, so staff sign in once with corporate credentials and use Cal.com alongside every other app we run for you. Admins grant and revoke access centrally, MFA and session policies apply consistently, and leavers lose access the moment they are removed from your identity system. It is one of the ways the Node platform turns a collection of apps into a coherent workspace.
How Node runs Cal.com for you
We operate Cal.com as a fully managed service, not a server you have to babysit.
Deployment: we deploy Cal.com in a production configuration on your own domain, with TLS, a proper database and your calendar and video integrations connected.
Upgrades and maintenance: Cal.com moves quickly. We test and apply updates, manage migrations and keep your instance current and secure without breaking live booking links.
Monitoring and support: we monitor availability and booking flow health, take regular backups, and our team is on hand when you need new event types, team changes or help.
Your infrastructure or ours: hosted on Node's UK infrastructure or deployed into your own environment, on-premises or in your cloud accounts, with the same managed service either way.
The economics of per-seat scheduling: scheduling is only useful if everyone has it, and per-seat pricing makes "everyone" the expensive option. Fifty staff on a paid Calendly tier costs thousands of pounds a year, every year, for booking links. A managed Cal.com deployment from Node is a flat, predictable cost whether five people take bookings or five hundred, with your booking pages on your own domain and your data on infrastructure you control.
Adoption and community
46k+ GitHub stars Cal.com states that its scheduling platform is used by over a million people, and its website carries endorsements from the founders of Vercel and Supabase.
“this would have handily solved an 8 figure problem for me at a previous company... good open source tooling for appointment scheduling is worth its weight in gold.”
Hacker News
“Happily using it for several months now after getting frustrated with calendly's UX.”
Hacker News
“Congrats on launching - this looks very promising!... I just happen to be a paying user of Calendly, so "Open source Calendly" was perfect for me.”
Hacker News
Quotes are from public community discussions, linked to their original sources.
Frequently asked questions
What is the best open source alternative to Calendly?
Cal.com's community edition is the leading open source alternative to Calendly. It provides booking pages, availability rules, round-robin and collective team scheduling, calendar and video integrations, and it can be self-hosted so booking runs on your own domain and infrastructure. Cal.com moved its flagship product to a commercial licence in 2026; the MIT-licensed community edition (Cal.diy) remains open source, and that is what Node deploys and manages for UK organisations.
Where is our Cal.com data hosted?
On Node's UK infrastructure, or in your own environment if you prefer. Booking data, attendee details and connected calendar credentials stay on infrastructure you control, backed by an Article 28 data processing agreement so your GDPR position is clear.
Can you migrate us from Calendly to Cal.com?
Yes. We recreate your event types, availability rules and team scheduling in Cal.com, reconnect your calendars and video conferencing, and set booking pages up on your own domain. Most teams switch over in a day, and old Calendly links can be redirected during the transition.
Does Cal.com work with Google Calendar and Outlook?
Yes. Cal.com connects to Google Calendar and Microsoft Outlook to read availability and write bookings, and integrates with video conferencing tools so meeting links are generated automatically when someone books.
Does Cal.com support single sign-on?
Yes. Every application in a Node tenant joins your own Keycloak realm, so your team signs in to Cal.com with the same corporate credentials they use everywhere else, with MFA and access policies enforced centrally.
What does the managed Cal.com service include?
Deployment on your own domain, upgrades and security patching, monitoring, backups, calendar and video integration setup, and support from our team when you need new event types, team changes or help. You take bookings; we run the platform.
Talk to us about Cal.com.
Drop us a line and our team will discuss your scheduling requirements and how a managed Cal.com deployment can replace Calendly across your team.
Our heritage
These projects were delivered by Tokyo Digital, acquired by Node in May 2023 and now a wholly owned subsidiary of Node DT Group. The same team builds and runs the Node platform today.