🚀 The open-source alternative to Twilio.
Programmable voice over your own SIP trunks, with an SDK and API for call apps; no SMS or email.
- Language
- TypeScript
- Licence
- MIT
- Stars
- 8.1k
- Latest
- v0.22.14
- Last push
- 2026-09-18
alternatives to
Twilio
Hosted communications APIs for SMS, voice calls, WhatsApp, email and phone number verification. A closed product from Twilio.
Side by side
| Tool | Fit | Stars | Licence | Terms | Self-hosted | Language | Latest | Last push |
|---|---|---|---|---|---|---|---|---|
| Fonoster | Partial | 8.1k | MIT | Open source | Yes | TypeScript | v0.22.14 | 2026-09-18 |
| SMS Gateway for Android | Partial | 5.8k | Apache-2.0 | Open source | Yes | Kotlin | v1.77.1 | 2026-10-05 |
| FreeSWITCH | Partial | 5.2k | Other | Open source | Yes | C | v1.11.3 | 2026-10-02 |
| Asterisk | Partial | 3.6k | Other | Open source | Yes | C | 23.5.0 | 2026-10-05 |
| textbee | Partial | 3.1k | MIT | Open source | Yes | TypeScript | v2.9.0 | 2026-10-05 |
| Jasmin | Partial | 1.2k | Other | Open source | Yes | Python | 0.11.0 | 2026-04-26 |
| jambonz | Partial | 103 | MIT | Open source | Yes | JavaScript | v0.9.14 | 2026-10-04 |
Every alternative
7 alternatives
The SMS Gateway for Android™ app enables sending and receiving SMS messages through an API that can be accessed directly on the device or via a cloud server when direct device access is not possible.
Sends and receives SMS through an Android phone over a REST API with webhooks, directly or through a relay server; no voice.
- Language
- Kotlin
- Licence
- Apache-2.0
- Stars
- 5.8k
- Latest
- v1.77.1
- Last push
- 2026-10-05
FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a versatile software implementation that runs on any commodity hardware. From a Raspberry PI to a multi-core server, FreeSWITCH can unlock the telecommunications potential of any device.
A softswitch for SIP calls, IVR, conferencing and recording, scripted through its event socket and Lua; no hosted REST API, phone numbers or SMS out of the box.
The official Asterisk Project repository.
A PBX and SIP toolkit with call control over its REST Interface (ARI) and Manager Interface; voice only, and numbers come from your own SIP trunks.
open-source sms-gateway. turn any android phone into an sms gateway
Sends and receives SMS through Android phones over a REST API and webhooks; no voice, and volume depends on the phones and their plans.
- Language
- TypeScript
- Licence
- MIT
- Stars
- 3.1k
- Latest
- v2.9.0
- Last push
- 2026-10-05
Jasmin - Open source SMS gateway
An SMS gateway with HTTP and SMPP APIs, routing and delivery receipts, sending through your own SMPP connections to carriers; no voice.
Core telephony feature server for the jambones platform
Voice call control through webhooks and a WebSocket API, over your own SIP carriers and speech providers; you run the SIP, media and database layers yourself.
- Language
- JavaScript
- Licence
- MIT
- Stars
- 103
- Latest
- v0.9.14
- Last push
- 2026-10-04
Head to head
- Asterisk vs Fonoster
- Asterisk vs FreeSWITCH
- Asterisk vs jambonz
- Asterisk vs Jasmin
- Asterisk vs SMS Gateway for Android
- Asterisk vs textbee
- Fonoster vs FreeSWITCH
- Fonoster vs jambonz
- Fonoster vs Jasmin
- Fonoster vs SMS Gateway for Android
- Fonoster vs textbee
- FreeSWITCH vs jambonz
- FreeSWITCH vs Jasmin
- FreeSWITCH vs SMS Gateway for Android
- FreeSWITCH vs textbee
- jambonz vs Jasmin
- jambonz vs SMS Gateway for Android
- jambonz vs textbee
- Jasmin vs SMS Gateway for Android
- Jasmin vs textbee
- SMS Gateway for Android vs textbee
About Twilio
- Vendor
- Twilio