twilio-alternative

Open-source SMS gateway. Turn your Android phone into an SMS API: send and receive SMS from your apps over REST and webhooks. Self-hostable, with a free hosted plan.

Official one-stop shop for AI Agents and developers building with Telnyx.

AI call assistant & voice API SDK for Node.js: official Telnyx library for AI voice agents, calls, SMS and phone numbers.

Production-ready code examples for Telnyx AI Communications Infrastructure — Voice AI, SMS, SIP, and IoT APIs

Open-source, API-first voice CPaaS for browser + telecom + whatsapp calling.

Open-source, self-hosted voice API: turn an Android phone's SIM into a programmable phone line for code and AI voice agents. A Twilio Voice alternative with REST, webhooks and WebSocket audio streams.

⚡ WhatsGateway: Free, self-hosted WhatsApp API & AI Agent Gateway. High-performance Twilio & Meta Cloud API alternative. Send unlimited messages, media, broadcasts, webhooks, and AI function-calling bot workflows powered by Baileys, Node.js & PHP.

Phone calls for every other language: one self-hosted binary turns SIP calls into WebSocket audio + REST call control. Twilio-compatible framing, so existing voice apps port over with the URL swapped.

Unified communication adapter for WhatsApp, Telegram, Slack, Teams, Email & more — built for scalable message routing and automation.

Open-source SMS API and phone verification. Send through Android phones you already own, with delivery reports and signed webhooks. Hosted or self-hosted.

Iot Device Api is a lightweight communication interface designed to collect telemetry, process sensor data, and manage smart hardware nodes remotely. Firmware engineers deploy this endpoint architecture to streamline machine-to-machine messaging, monitor connected equipment, and control automation workflows securely.

StroApp SMS - Virtual Phone Number Platform. Aggregates SMS provider APIs for receiving SMS verification codes. Built with FastAPI (Python) + Flutter (User App & Admin Dashboard).

Direct HTTP examples for programmable routing in SMS infrastructure. No SDK. Execute delivery via route_id, inspect pricing and track with bx_message_id.

Programmable routing SDK for SMS infrastructure. Control route_id, pricing before execution and track delivery with bx_message_id.

🎙️ Production-ready HTTP API for injecting audio into SIP calls using Linphone. Perfect for IVR systems, voice bots, and call testing. Fast, reliable, open-source.

Add and operate transactional email, SMS, push & web-push from your AI coding agent — no provider lock-in. Skills + MCP for Claude Code, Codex & Cursor.

Official Python client for the smsroute.cc SMS API - send SMS to 150+ countries, stdlib only

Send OTP verification messages via DataFlows SMS API for Supabase Auth

Claude Code plugin and MCP config for volai - Czech telephony API and MCP for apps and AI agents: numbers, calls, SMS, voice agent.

No-KYC SMS API examples (curl/Python/Node/PHP/Go) — crypto billing BTC/ETH/USDT — Twilio alternative code