Best Open Source Alternatives to Twilio

Compare the best free and open-source alternatives to Twilio — self-hosted and desktop replacements you fully control, ranked by GitHub stars, license and platform support.

Curated by open-source.store · Updated November 2026 · 2 alternatives

Twilio

Proprietary SaaS

Twilio alternatives compared

Open-source alternatives to Twilio, compared by stars, license and platform
Tool		License	Platforms	Self-hosted
Fonoster	8,162	MIT	Web	No	Nov 2026	Visit
useSend	4,778	AGPL-3.0	DockerLinux	Yes	Oct 2026	Visit

Top open-source Twilio alternatives

Fonoster8,162MIT

Fonoster is an open-source alternative to Twilio for building programmable voice apps and IVRs with Node.js and self-hosted SIP infrastructure.

Web

vs Twilio: a free, open-source option you fully control, licensed MIT.

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EasyP

Promoted

The modern standard for Protobuf workflows

Lint, codegen, breaking-change checks and dependency management in one Git-native CLI. Open source, no registry lock-in.

lintgeneratebreakingeasyp.lock

go · ts · java generated

$ easyp breaking

backward compatible

useSend4,778AGPL-3.0

Open-source email delivery platform pairing a Next.js dashboard with Amazon SES to send transactional and marketing messages without per-contact fees.

DockerLinux

vs Twilio: a free, open-source option you fully control, licensed AGPL-3.0.

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