In short: Google's forwarding number is free, you switch it on from the account itself and it measures calls coming from its ads well. Everything else — organic search, your business profile, social media, a leaflet, word of mouth — is invisible to it. A call tracking provider covers that gap by giving each visitor a different number, for a monthly fee. Here is how to work out which one you need.
What each one measures
| Google forwarding | Call tracking provider | |
|---|---|---|
| Calls from Google ads | ✅ | ✅ |
| Calls to your site from a Google ad click | ✅ | ✅ |
| Calls from organic search (SEO) | ❌ | ✅ |
| Calls from your business profile / maps | ❌ | ✅ |
| Calls from social, email or offline campaigns | ❌ | ✅ |
| Call duration | ✅ | ✅ |
| Recording and transcription | ❌ | ✅ (optional) |
| The exact keyword that brought the call | ✅ | ✅ |
| Direct CRM integration | Via import | Usually native |
| Cost | €0 | Monthly fee |
The blind spot that settles the argument
Google's forwarding number is only shown to people arriving from one of its ads. That makes sense: it is a Google Ads feature, not a general measurement system.
The practical consequence is awkward. If your business takes a lot of calls and a good share of them don't come from advertising, Google forwarding gives you a partial picture: you will see what Google Ads contributes, but you won't be able to answer the question management actually cares about, which is "where do my customers come from?".
A call tracking provider gives each visitor a number from a pool and remembers where they came from. When that person calls, it knows whether they were brought in by paid search, organic search, Instagram or the leaflet through the door — and with which keyword, on which page, after how long browsing.
What it costs
There are two families of providers:
- Call tracking specialists, built for marketing. As a public reference, CallRail lists plans from $50 to $195 a month (rates checked on 18/09/2026), including a handful of numbers and some minutes, with extra numbers and minutes charged on top.
- Cloud switchboards with tracking built in. They usually charge per user per month and work out well if you were going to change phone system anyway.
If you operate in Europe, favour a European provider: the numbers are national, billing is in euros and — most importantly — the data doesn't leave the European Union, which makes the next section far simpler.
Always ask three things in a quote: how many numbers are included (the pool runs short sooner than you think), the per-minute price, and whether the Google Ads and CRM integrations are in the plan or an extra.
How to decide without agonising
| Your situation | What you need |
|---|---|
| Few calls, nearly all from ads | Google forwarding. Free and enough |
| Plenty of calls but you only optimise Google Ads | Google forwarding, and finish installing it across the site |
| The phone is your main channel and it rings from everywhere | A provider. A partial picture will lead you to bad calls |
| Several locations or numbers and no idea which performs | A provider |
| You want to know what is being said on the calls | A provider with recording, after reading the next section |
A sensible order: squeeze Google forwarding first — it costs nothing and hardly anyone has it properly installed — and consider a provider once you know, with numbers, what share of your calls is slipping through.
Data protection: what has to be nailed down
A phone number is personal data, and a call can contain sensitive data — health, finances, legal matters. Four rules that are not optional:
- Legal basis and transparency. The processing has to appear in your privacy policy: what is recorded about the call, what for, and how long it is kept.
- Recording: notice first. If you record, you must say so at the start of the call, before the person starts talking, and offer a reasonable alternative.
- Data processor agreement. The provider processes data on your behalf: you need a signed processing agreement, and it is worth insisting the data is hosted in the European Union.
- What you send to Google. The Google Ads user data policy forbids sending it information that personally identifies someone outside the fields designed for it. A call import sends the number and the time — which Google already knew, having sat in the middle of the call — never the content of the conversation or sensitive data.
⚠️ Pitfall: in healthcare, legal or financial sectors, recording turns a marketing project into a compliance project. Before switching it on, ask whether you need it: without recording, the same service still gives you source, duration and outcome, which is what moves the bid. Recording "just in case" means taking on risk for nothing.
What you should remember
- Google forwarding is free and measures what comes from its own ads well; every other channel is invisible to it.
- A call tracking provider gives one number per visitor and covers every channel, with duration and optional recording, for a monthly fee.
- Always start by squeezing forwarding: most accounts have it half installed.
- If you operate in Europe, use a European provider: less paperwork, less risk.
- Recording means notice at the start of the call and a signed processing agreement. The content of the conversation never goes to Google.