Some top alternatives to Amazon SNS includes Amazon SES, Everbridge IT Alerting, TelAlert, SyncAlert and MQTTRoute.
Yes, Amazon SNS provides API.
No, Amazon SNS doesn't provide mobile app.
Amazon SNS is located in Seattle, Washington
Amazon SNS offers Freemium, Subscription pricing models
The starting price is not disclosed by Amazon SNS. You can visit Amazon SNS pricing page to get the latest pricing.