How can I authenticate a phone number in a form?

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1

I need my customers to authenticate their phone numbers when filling out a form on my website so that I know it is valid and belongs to the person filling out the form.
Is there any way? Thanks

2

Look into Twilio.

The typical setup is to send them an sms with a special code, and have them enter it in the website. If security needs to be tight, you’d need to generate that secret code server-side.

You can construct this with Airtable, Make, Twilio ( or any SMS provider ), and a bit of custom code.

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Thank you for your support @memetican. I found this service, and it was awesome: https://WhatsAuth.com.
Every time a user fills out the form, they have to send me a Whatsapp message with a code. The system automatically detects their numbers, and I authenticate them.

Here is the documentation for webflow WhatsAuth in Webflow | WhatsAuth Developers Docs

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A bit expensive, it woks out to about $0.08 per login on the basic plan, but looks good for the right need. I’m seeing WhatsApp-based auth used a lot more recently, FB must be pushing it.

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After a week of using the service, I can say that it was cheaper than Twilio and very easy to use for our use case. Also, the customer experience is great; we are having good conversions.