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RingCaptcha's two-factor authentication (2FA) provides an initial screen to block fake leads while our backend code goes one step further, identifying and blocking suspicious requests and adding them to a blocklist to keep your business safe going forward. RingCaptcha can let you validate your leads so that your sales team knows which are real and which are fake... Validate leads and block bad actors with our reliable and simple SMS & Voice 2FA product, so you can engage your worldwide customers... Onboard engage users in 90s with phone identity, verification, OTP SMS notification. Send reliable voice/SMS OTP with Twillio, MessageBird, Nexmo, Infobip, etc. from 1 API.