For vendors
AdvertiseTop spots, featured rows, home sponsor Get listedAdd a product we don't cover yet Claim a listingFree: verify the domain, then correct your page Vendor dashboardNumbers, orders and placements
Mobile US PressList your app
Vendor dashboard

Alert21

No phone app

5.3No. 25 of 74
in Transactional SMS Software
  • Recognised40% of the score20
  • Phone app26% of the score0
  • Documented20% of the score47
  • Free plan14% of the score30
Free plan
No
Runs on
Web
Visit site Alternatives

Summary

Alert21 is ranked #25 of 74 in transactional SMS software on Samsung Mobile US Press. It runs on Web.

Alert21 plans and pricing

All plans
SMS pay-as-you-go Not published 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

Best Alert21 alternatives

See all 12
ClickSend SMS API No. 1 7.7 iPhone onlyMailchimp No. 2 7.7 iPhone + AndroidFreeBulkGate No. 3 7.0 Android onlyVonage SMS API No. 4 6.9 iPhone + AndroidTrueDialog No. 5 6.8 iPhone + Android$119/moSinch Verification API No. 6 6.7 iPhone + Android

Where it ranks on Samsung Mobile US Press

Is Alert21 yours?

Claim it for free: prove the domain, then correct facts, plans and screenshots. An editor reviews every change.

Claim it free Promote Alert21

Sources