Click to call vs Callback

If you've ever added a call button to a website, you've probably come across both of these. A lot of people treat them as interchangeable, but they really aren't — they target different moments in the customer journey.

Here's the short version:

Click to Call (WebRTC-based button)

The visitor clicks, the call starts instantly in their browser. No phone number needed, no extra software — just a mic and speakers. The employee picks up via a softphone or gets a forwarded call. That's it.

Best for:

Hot leads who are ready to talk right now

Mobile users (they're already on a phone)

Support flows where speed = satisfaction

Callback widget (form-based)

The visitor enters their number, optionally picks a time, and your system calls them back. The business is the active side here. You can configure when the widget appears — after X seconds, on scroll, on specific pages, etc.

Best for:

Hesitant visitors who aren't ready to call but might convert later

Outside business hours

Time zones where the visitor can't talk right now

Lead capture + CRM pipeline

Quick comparison

Feature	Callback	Click to Call
Main purpose	Lead conversion	Instant contact
Who initiates	Business calls back	Visitor calls in
Cost	Free widget, pay per outgoing call	Free (VoIP over internet)
Visitor requirements	None	Mic + speakers, modern browser
CRM integration	Yes	Yes
Voice menu (IVR)	No	Yes (via PBX)
Scheduling	Yes	No
Setup time	~2 min	~2 min

Both connect to a cloud PBX, log calls, support recording, and integrate with analytics. Both are free to add to a site. The real question is just: do you want the visitor to reach you instantly, or do you want to capture them for a callback?

For most businesses, running both simultaneously makes sense — Click to Call for the "ready to buy now" crowd, Callback for everyone else.

Full write-up with setup details: zadarma.com/en/blog/callback-vs-clicktocall/