SMSGateSend and receive SMS through a local API on your own Android phone.
Free Apache-2.0 software; requires Android 5.0+, a SIM and carrier service. Carrier SMS limits and charges still apply.
SMS APIs
Free alternatives to Twilio
Find a free app for the parts of Twilio you actually use.
Compare the free allowance and limitations on each app’s page. These are workflow alternatives, rather than identical copies.
Free options
Suggest an alternative →SMSGate