runsonwhat

Cal.com's tech stack

What does Cal.com use?

Cal.com (cal.com) uses at least 28 tools we can see from public records, including Vercel for hosting, Microsoft 365 for email and documents, HubSpot for sales and Mintlify for customer support. Last checked .

Industry
Internet
Size
11–50 employees
Based in
San Francisco, United States
Founded
2021
LinkedIn
Company page
Re-check liveVisit cal.com
Tools found
28
Categories
15
Layers
5 of 5
Last checked
Oct 2026

Cal.com's stack, layer by layer

Each tool links to the other companies we've found using it. The label says what kind of public trace gave it away.

Edge & Hosting

2 tools, where the bytes are served from

Hosting & Cloud

CDN & Edge

Application

5 tools, what the product is built with

Frontend

AI

Media & UI

Data & Observability

2 tools, what they measure and store

Analytics

Go-to-market

8 tools, how they find and keep customers

Website & CMS

Marketing

Ads & Pixels

Sales & CRM

Support & Docs

Company Ops

11 tools, what the team runs on day to day

Email Delivery

Workspace

Dev Tools

Security & Compliance

Companies like Cal.com also use

Tools common among companies with a similar stack that we haven't found at Cal.com.

Companies with a stack like Cal.com's

Ranked by shared tools, with rare tools counting more.

More Internet companies

Other Internet companies we've checked.

Cal.com tech stack FAQ

What tools does Cal.com use?

We've found 28 tools at Cal.com (cal.com). Edge & Hosting: Cloudflare and Vercel. Application: Google Fonts, React and OpenAI. Data & Observability: Google Tag Manager and PostHog. Go-to-market: HubSpot, X Ads and Framer. Company Ops: Microsoft 365, Google Workspace and SendGrid. Last checked October 7, 2026.

What cloud does Cal.com run on?

Cal.com uses Vercel for hosting. We found Vercel through custom domain and DNS verification records.

What CRM does Cal.com use?

Cal.com uses HubSpot for sales and CRM. We found HubSpot through website code.

What email provider does Cal.com use?

Cal.com uses Microsoft 365, Google Workspace and Apple Business for email and documents. We found Microsoft 365 through DNS verification records.

What does Cal.com use for customer support?

Cal.com uses Mintlify for customer support. We found Mintlify through website code.

What analytics tools does Cal.com use?

Cal.com uses Google Tag Manager and PostHog for analytics. We found Google Tag Manager through website code.

Does Cal.com use Microsoft 365?

Yes. We found Microsoft 365 at Cal.com through DNS verification records. Microsoft 365 is used by 685,697 companies we track.

How does runsonwhat know what Cal.com uses?

We read public traces only: Cal.com's DNS and email records, certificate logs, the code its website loads, and published subprocessor lists. A tool is listed only when a direct record backs it up. DNS is rechecked weekly and the website monthly.

We read public traces only: DNS and email records, certificate logs, website code and published subprocessor lists. A tool is listed when a direct record backs it up, and dropped when a recheck no longer finds it. Is this your company? See how to opt out.