The most impressive thing is the delivery speed and "Pay-per-Success"billing model for the OTPS. In our previous setup, we struggled with high latelncy in southeast Asia and LATAM, leading to user drop-offs. With engagelab, our OTP delivery is consistently under 5 seconds globally.
I also love the multi-channel failover feature! If an SMS fail to deliver due to local carrier issues, the system can automatically retry via WhatsApp or Voice. This has boosted our verification success rate by about 80%. Plus, the intergration was seamless - their API documentation is very developer-friendly, and we were up and running in less than two days. Review collected by and hosted on G2.com.
While the core fucntionally is rocak-solid, I'd like to see more granular "reason for Failure" codes in the real-time analytics dashboard. Currently, it tells you if a meddage failed, but more specific carrier-level feedback would help our support team troubloeshoot user issues even faster. That said, their technical support team is very responsive whenever we have questions. Review collected by and hosted on G2.com.
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