Amazon Cognito vs. OTPless

Amazon Cognito

The biggest advantage of Cognito is that it's a part of the AWS ecosystem and integrates well with other AWS services. The free tier comes with 50,000 MAUs and the price for each additional MAU starts at $0.0055/month and goes down to as low as $0.0025/month as you scale to tens of millions of users. It integrated with four federated identity providers - your users can sign up with Facebook, Google, Apple and Amazon.

OTPless

Authenticate customers with WhatsApp, SMS, Email, Biometrics, and more. The conversion rate on signup and sign-in is 98%.

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    Pros
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    Generous free tier1
    Low price per monthly active user1
    Part of AWS ecosystem1
    Cons
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    Confusing, sometimes misleading documentation1
    Difficult to set up1
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