What is browser-to-browser calling (WebRTC)?

The short answer

Browser-to-browser calling is a way for two people to have a live voice or video call straight through their web browsers — without a phone number, an app, or any phone hardware. A visitor clicks a "Call" button on a website, the browser asks once for microphone permission, and the conversation starts. The technology that makes this possible is called WebRTC, an open standard already built into Chrome, Safari, Firefox, and Edge.

For a business, the practical version is simple: instead of asking website visitors to find your number, dial it, and hope someone answers, you give them a button that connects them to you (or your AI receptionist) right where they already are. That's what WebCallHub does — it's a "Call Support" button you embed on any website.

What does "WebRTC" actually mean?

WebRTC stands for Web Real-Time Communication. It's a free, open technology that lets browsers send audio, video, and data directly to one another in real time. It's the same family of technology behind the video and voice calls you make from web-based meeting tools — except here it's wired into a single button on your website.

Because WebRTC is built into the browser itself, there's nothing for your customer to install. No plugin, no extension, no download. If they can load your web page, they can call you.

The plain-English version of how a call connects

You don't have to manage any of that machinery yourself. A service like WebCallHub handles the connection, the security, and the routing behind the scenes — you just paste in a button.

How is this different from a normal phone system?

A traditional phone system — landline, mobile, or VoIP — routes calls over the public telephone network using phone numbers, SIM cards, or desk phones. Browser-to-browser calling skips that network entirely. The call begins on the web page your customer is already looking at.

Here's what that changes in practice:

• No number to dial. The visitor clicks instead of typing digits, so there's no friction and no chance of mis-dialing.
• No app to download. It runs in the browser they already have open.
• No phone hardware. No handsets, no PBX box, no SIM cards to provision.
• Context comes along. Because the call starts on a specific page, you know what the visitor was looking at when they reached out.
• Predictable cost. WebCallHub's plans are flat monthly fees, not per-minute telephony charges.

Why small businesses care about this

Most small-business websites still rely on a contact form or a phone number buried in the footer. Both leak customers. A form means waiting hours (or days) for a reply; a phone number means the visitor has to switch devices, dial, and risk voicemail. Every extra step is a chance to lose the sale.

A browser call collapses all of that into one click while the visitor is still interested. The benefits stack up quickly:

• You catch buyers at peak intent — right when they're on your pricing or product page.
• Setup is genuinely fast — for most sites it's a single script tag or a one-click plugin.
• It works everywhere your site does — WordPress, Shopify, Wix, or plain HTML.
• Nobody slips through after hours — an optional AI receptionist can answer 24/7, take a message, and capture a callback.

If you sell appointments or high-value services, this matters even more. We've written about it for specific industries — see click-to-call for dental clinics and click-to-call for real estate — but the principle is universal: a live conversation closes more business than a form ever will.

What WebCallHub adds on top of WebRTC

WebRTC is the raw connection. WebCallHub turns it into something a non-technical business owner can actually run. Out of the box you get:

• A "Call Support" button you embed on any website — one script tag, a WordPress plugin, a Shopify app, a Wix snippet, or an npm package.
• A 24/7 AI receptionist option that answers calls, takes voicemail, and captures callbacks when you can't pick up.
• Live transcription so every conversation is written down automatically.
• Video calls on the Business plan and up, plus PSTN fallback that can ring a phone number when needed.
• A call analytics dashboard, QR-code call links, and booking/calendar integration.

Pricing starts at a free tier and scales with simple flat monthly plans, so you can try browser calling on your site before committing to anything. See the full breakdown on the pricing page.

Is it secure and private?

Yes. WebRTC encrypts call media in transit by default (using a standard called DTLS-SRTP), so the audio between your visitor and your agent is protected. WebCallHub is operated from the EU and built GDPR-first, which is one reason privacy-conscious small businesses choose it for customer calls. The visitor grants microphone access explicitly, once, and stays in control.

Frequently asked questions