replacing Twilio
Open Source Twilio Alternatives
SMS and communication APIs — Twilio pricing: Pay-as-you-go. Below: 2 free,
self-hostable open source projects that cover the same ground, ranked by real GitHub adoption.
There are 2 open source Twilio alternatives tracked on this registry, against Twilio pricing of Pay-as-you-go. The most-adopted is Chatwoot with 36,913 GitHub stars, written in Ruby. Together the set has 45,026 stars across 2 languages and 1 licence. All 2 are free to self-host with no licence fee, and 2 of 2 received a commit in the last 90 days. 2 head-to-head Twilio comparisons are available.
Per-message and per-minute pricing compounds. A2P registration fees. Your communication metadata lives on Twilio's servers.
Our top 2 Twilio alternatives
Chatwoot is the modern, open-source, self-hosted customer support platform, built for scale and flexibility. It gives businesses full control over their customer data while providing tools to manage conversations across channels: live chat on a website, email, Facebook, Instagram, Twitter, WhatsApp, Telegram, Line, and SMS. It ships with Captain, Chatwoot's AI agent for support, which answers common queries automatically so that agents can concentrate on complex conversations.
NOASSERTION · Ruby · Twilio vs Chatwoot →
Fonoster is an open-source cloud communications platform, described in its README as a "Programmable Telecommunications Stack" that lets businesses connect telephony services with the Internet entirely through a cloud-based utility. It lives in the CPaaS ecosystem, the same category as Twilio, and ships as a TypeScript codebase under the MIT licence. The platform is API-first: a Voice Application is a server that controls a call's flow, written against the Node.js SDK (`@fonoster/sdk`) and the voice server module (`@fonoster/voice`). A plugins-based command-line tool drives the same API, and deployments target Kubernetes alongside the other topics attached to the project.
MIT · TypeScript · Twilio vs Fonoster →
last updated nightly · ranking method: github stars, live-tracked
Frequently asked questions
What is the best open source alternative to Twilio?
Chatwoot is the most-starred open source alternative to Twilio in this registry, with 36,913 GitHub stars. 2 alternatives are compared here in total.
Are there free alternatives to Twilio?
Yes. Every project listed on this page is open source and free to self-host — there is no licence fee. Some projects also sell a managed hosted version, but the self-hosted path costs nothing.
What should I look at when replacing Twilio?
Compare licence terms, community size (stars), primary language and release activity. A fast-moving project with a compatible licence and an active maintainer base matters more than raw star count when you are committing to a migration.