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Fonoster

🟢 Updated this week 30 Indie Score

Open-source programmable telecom. Twilio alternative.

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Community listing — This tool was added by the IndieStack community, not by its creators. If you built Fonoster, you can claim this listing to manage it, or request removal.

Fonoster is an open-source alternative to Twilio for programmable telecommunications. Voice, SMS, and video APIs built on open standards (SIP, WebRTC). Self-host your telecom stack with full control over your communications.

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