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Alert21

C
C tier on Transactional SMS SoftwareScore 5.6· #56of 77
Runs on
Web
alert21.in
The Alert21 homepage
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Summary

Alert21 is ranked #56 of 77 in transactional SMS software on Everything Xiaomi. It runs on Web.

Alert21 plans and pricing

All plans
SMS pay-as-you-go Usage-based billing · Volume discounts as sending scale grows · Prepaid balance in Indian Rupees alert21.in · 24 Sept 2026

Compared on transactional SMS software

Pay-as-you-go
Yesalert21.in
SMS API
Yesalert21.in
Delivery status
Yesalert21.in
Webhooks
Yesalert21.in

Company

Headquarters
Greater Noida, Uttar Pradesh, Indiaalert21.in · 4 Oct 2026

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Ctier ClickSend SMS API #1 6.9 Ctier Mailchimp #2 6.9 Android FreeCtier Bandwidth Messaging API #3 6.8 Ctier Telnyx SMS API #4 6.8 $500/moCtier Textmagic #5 6.8 Android $0.05/moCtier D7 Networks #6 6.7

Where it ranks on Everything Xiaomi

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