Another way to cut down on costs is to use email-to-SMS gateways. Emails are usually way cheaper to send than SMS ($0.0005 per email with Mailgun vs $0.0075 per SMS through Twilio). The biggest downside is that these gateways can be a bit flakey, but I had good results with CorpScores[1].<p>[1] <a href="https:&#x2F;&#x2F;github.com&#x2F;kevana&#x2F;corpscores&#x2F;blob&#x2F;master&#x2F;dci_notify&#x2F;sms.py" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;kevana&#x2F;corpscores&#x2F;blob&#x2F;master&#x2F;dci_notify&#x2F;...</a>