Overview
News
Technologies
Salaries
Products
People
Growth
Offices
Jobs
Financials

Funding and backers

Total raised
$25M
1 round on record
Latest round
$25M
Series A · Apr 2022 · 4 yr ago
Team
23
US Form 5500 (plan participants) · Dec 2024
Hiring now
1
+1 posted in 30 days
Backers
3
Obvious Ventures, OSS Capital
The money's age
Long since its last round
53 months since the last round · and hiring
Momentum
28/100
hiring for its size, in the news
Last sign of life
this month
a posting or a news item
The story so fareach stage dated by its source: the company's releases, the press, registers, filings
Apr 18, 2022 Raised a round Series A $25M · Venturebeat 2021 Founded
Tractionpublic signals, read monthly
Web presence
top 0.01%
of 133.2M domains by links, Common Crawl
GitHub stars
27 public repositories
Hacker News stories
22
best: 576 points
Funding rounds
RoundDateAmountInvestorsSource
Series A Apr 2022 $25M — Venturebeat
Backed byfrom the funds' portfolios and accelerator catalogs
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Overview

Headquartered in San Francisco, California, Cal is an open-source scheduling infrastructure and calendar management company. Founded in 2021, the firm provides a customizable, self-hostable alternative to traditional appointment booking tools, allowing developers to embed flexible scheduling workflows directly into their applications. By offering extensive API integrations, white-label branding, and enterprise-grade security, the platform enables organizations worldwide to streamline time management and automated meeting coordination.

News

News Business Insider 4 months ago
This 19-year-old sold his $30 million AI calorie-tracking startup. Now he's tackling doomscrolling.
MyFitnessPal acquired Cal AI, an AI-powered calorie-tracking app that 19-year-old Zach Yadegari cofounded while he was in high school, last year.
Read more
Report
News XDA 5 months ago
Cal.com just went closed source over AI, but AI is exactly why open source still wins
Going closed source now feels like the wrong move.
Read more
Report
News Cult of Mac 6 months ago
Why did Apple suddenly remove a top fitness app?
Users may wonder why the App Store pulled the hugely popular Cal AI health app (now back). Apple says it violated three sets of guidelines.
Read more
Report
News MacRumors 6 months ago
Apple Pulled Cal AI for Deceptive Billing Design, Not External Payments
Apple recently cracked down on Cal AI, an app owned by MyFitnessPal that tried to skirt Apple's in-app purchase rules. Apple told TechCrunch that it briefly pulled the calorie-counting app last week for violating purchasing guidelines and using a deceptiv
Read more
Report
News TechCrunch 6 months ago
Apple's Cal AI crackdown signals it's still policing the App Store
Apple tells TechCrunch Cal AI was removed not for web payments alone, but for deceptive billing, manipulative tactics, and App Store rule violations.
Read more
Report
News codeplusconduct.substack.com 6 months ago
The Cal.com Announcement and the End of Naive Open Source
AI did not create open source's crisis by itself. It exposed a moral economy already straining under unpaid labor, asymmetrical extraction, and a new duty of care.
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Report
News cal.com 6 months ago
Cal.com Scheduling Software for Online Bookings
A fully customizable scheduling software for individuals, businesses taking calls and developers building scheduling platforms where users meet users.
Read more
Report
News cal.com 6 months ago
Cal.com Goes Closed Source: Why AI Security Is Forcing Our Decision Cal.com - Scheduling Software for Online Bookings
Cal.com goes closed source after 5 years. Here's why rising AI-driven security risks and vulnerability discovery are forcing us to protect customer data.
Read more
Report
News cal.com 6 months ago
Going Closed-Source: Technical Changes Behind Cal.diy Cal.com - Scheduling Software for Online Bookings
Learn what Cal.diy is, what features were removed from Cal.com, and how this MIT-licensed open-source scheduling platform is built for developers.
Read more
Report
Show more news

Tech stack

Technologies named in job postings at CAL over the last 12 months, by layer, with the share of postings for each.
Technologies in use
5
Postings analysed
2
Stack modernity
76/100
Languages
TypeScript
Cloud & platforms
Framer
Figma
Developer tools
Claude Code
Cursor
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Salary insights

Compensation ranges based on this company's open jobs
Median
$150k
Typical range
$150k
Open positions
1
1 Jobs
Senior 100%
Level Jobs Median Typical range
Senior 1 $150k $150k
Highest paying role Senior Product Design Engineer $150k
Normalized to USD per year

Growth

Hiring Momentum
80/100
Scaling fast
Open positions
1
2 opened / 2 closed in 30 days
Median time-to-fill
42 days
faster than 33% of the market
ATS activity
Every ~11 hours
Today
Hiring Dynamics +100%
Hiring Focus
The percentage next to each role is its share of the company's job openings over the last 90 days; the arrow shows the shift versus the previous period.
Hardware
50% ▲
Design
50% ▲
Activity Timeline
Added TypeScript to stack Sep 2026
Added Notion to stack Sep 2026
Added Framer to stack Sep 2026
Added Figma to stack Sep 2026
Added Cursor to stack Sep 2026
Added Claude Code to stack Sep 2026

Offices

Where the company hires and what each office is for
Cities
2
Hiring now
0
Countries
1
Loading the map
Headquarters Builds here Office with open vacancies No open vacancies right now Tap a pin for the office
San Francisco United States
HQ
New York United States
Regional office
50-200 est. staff
seen since Jul 2026 company site

Jobs

$100k – $150k per year • Remote (worldwide) • Full-Time
TypeScript
Cursor
Claude Code
Design
Framer
Management
Notion
Apply

Financials

Total raised
$25M
Latest round
Series A
Funding rounds
1
Funding rounds
Round Announced Amount
Series A 2022 $25M Details