How to Use Cal.com for Indie Hackers
Indie hackers need a fast, cheap way to book calls with investors, customers, and mentors. Cal.com lets you create custom scheduling pages without a subscription fee. This guide walks you through every step: sign‑up, calendar connection, event‑type design, embedding on a product site, and automation. Follow the numbered steps and copy the code blocks to get your booking page live in under an hour.
Table of contents
- 1. Create a Cal.com account
- 2. Connect your primary calendar
- 3. Build event types for indie use‑cases
- 4. Embed the scheduler on your landing page
- 5. Automate notifications with Zapier
- 6. Pricing and feature comparison
- 7. Frequently asked questions
1. Create a Cal.com account
1.1 Sign up with email or GitHub
Visit cal.com and click “Sign up”. Choose “Email” or “GitHub”. The free tier requires no credit card.
1.2 Verify your email
Check your inbox for a verification link. Click it within 24 hours to activate your account.
1.3 Set your profile
Navigate to Settings → Profile. Fill in your name, a short bio, and upload a 400 × 400 px photo. This information appears on the booking page.
2. Connect your primary calendar
2.1 Choose a provider
Cal.com supports Google, Outlook, and iCloud. Click “Add Calendar” and select the service you already use.
Settings → Integrations → Calendar → Add Calendar2.2 Grant permissions
Allow read/write access so Cal.com can create events and block busy slots.
2.3 Test the sync
Create a test event in your Google Calendar. Then open Cal.com’s “Availability” page; the time slot should be marked as busy.
3. Build event types for indie use‑cases
3.1 Create “Investor Call” (30 min)
Go to Dashboard → Event Types → + New Event Type.
Title: Investor Call
Duration: 30 minutes
Buffer before: 5 min
Buffer after: 10 min
Location: Zoom (auto‑generate link)
Set “Maximum bookings per day” to 2 to avoid overload.
3.2 Create “Customer Demo” (45 min)
Use a custom booking form to collect company name and product URL.
Form fields:
- Full name (required)
- Company (required)
- Product URL (required)
- How did you hear about us? (optional)
3.3 Create “Mentor Office Hours” (15 min, recurring)
Enable “Recurring slots” and set a weekly pattern: Mon‑Fri, 10 am‑12 pm UTC.
3.4 Publish the event types
After saving, each type gets a unique URL like https://cal.com/yourname/investor-call. Copy these URLs for the embed step.
4. Embed the scheduler on your landing page
4.1 Choose embed method
Cal.com offers two options: an inline iFrame or a script that loads a modal. The iFrame works on static sites without JavaScript.
4.2 iFrame example
Insert the following HTML where you want the booking form to appear.
<iframe src="https://cal.com/yourname/investor-call?embed_domain=yourdomain.com"
style="border:0;width:100%;height:650px;"
loading="lazy"></iframe>
4.3 Modal script example
Place the script near the bottom of your page and add a button that triggers it.
<button id="bookBtn">Book a Call</button>
<script src="https://embed.cal.com/embed.js"></script>
<script>
document.getElementById('bookBtn').addEventListener('click',function(){
Cal.open('yourname/investor-call');
});
</script>
Replace yourname with your Cal.com username.
4.4 Responsive styling
The iFrame’s width is 100 % of its container, so it scales on mobile. If you need a max‑height, add a media query:
@media (max-width:600px){
iframe{height:500px;}
}
5. Automate notifications with Zapier
5.1 Create a Zapier trigger
Log into Zapier, click “Make a Zap”, and search for “Cal.com”. Choose the trigger “New Booking”.
5.2 Add actions
- Send a Slack message to #sales.
- Create a row in Airtable with the booking details.
- Post a thank‑you email via Gmail.
5.3 Sample Zap JSON
{
"trigger": "cal_com.new_booking",
"actions": [
{"app":"slack","event":"send_message","channel":"#sales"},
{"app":"airtable","event":"create_record","base":"appXYZ"},
{"app":"gmail","event":"send_email","to":"{{customer_email}}"}
]
}
6. Pricing and feature comparison
Below is a side‑by‑side look at Cal.com, Calendly, and Acuity Scheduling as of June 2026. Prices are USD per month, billed annually.
| Feature | Cal.com (Free) | Calendly Basic | Acuity Growing |
|---|---|---|---|
| Unlimited event types | ✓ | ✗ (1) | ✓ |
| Custom branding removal | ✓ | ✗ | ✗ |
| Zapier integration | ✓ (native) | ✗ (requires Premium) | ✓ |
| Video conferencing links | ✓ (Zoom, Google Meet) | ✓ (Zoom only) | ✓ (multiple) |
| Payment collection | ✗ (needs Stripe add‑on) | ✓ (Stripe) | ✓ (Stripe, PayPal) |
| Monthly price per user | $0 | $8 | $15 |
| Support SLA | Community | Email (24 h) | Email (12 h) |
For most solo indie hackers, the free Cal.com tier already covers the essential workflow. Upgrade to the $12 Pro plan only if you need a custom domain or advanced routing.
7. Frequently asked questions
Is Cal.com free for indie hackers?
Yes. The free tier includes unlimited event types, basic branding removal, and up to 10 active calendar connections.
Can I embed Cal.com on a static site?
Absolutely. Use the iFrame code or the lightweight embed script. Both work on Hugo, Jekyll, Netlify, or plain HTML.
How does Cal.com compare to Calendly on price?
Calendly’s Basic plan costs $8 / month per user. Cal.com’s free plan offers comparable features with no monthly fee. The Pro plan at $12 adds custom domains and advanced routing, still cheaper than Calendly’s Premium.
Do I need a separate calendar app?
No. Cal.com syncs with Google Calendar, Outlook, and iCloud. Choose the one you already use.
Can I automate Cal.com with Zapier?
Yes. Cal.com provides native Zapier triggers for new bookings, cancellations, and reschedules. Connect them to Slack, Airtable, Stripe, or any other Zapier app.
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With this guide you should be able to launch a professional booking page in minutes. Cal.com’s free tier keeps costs at zero while giving indie hackers the flexibility to grow. Test the embed, tweak the event types, and watch your calendar fill with meaningful conversations.