Show HN: Hail.so – Open-source phone, SMS and email for agents and humans, v0.15 (github.com)

Hail.so has launched an open-source communication platform designed for seamless interactions between AI agents and humans, with functionalities for phone calls, SMS, and emails. Currently at version 0.15, this universal communication tool is self-hostable and leverages multiple integration options, enabling users to connect their own AI models or utilize built-in fallbacks from major firms like OpenAI, Gemini, or Anthropic. The platform promotes transparency with explicit OpenAPI contracts, ensuring ease of use and integration with straightforward documentation. This update is significant for the AI/ML community as it empowers developers to create AI agents capable of handling diverse communication tasks in a streamlined manner. The architecture supports a broad range of features, including a voice pipeline and transport, making it versatile for various applications. Key functionalities include outbound communications via services like Twilio and SES, as well as inbound capabilities, all while supporting multichannel event streaming. With quick setup and clear documentation, Hail.so provides a robust foundation for building sophisticated AI-driven communication applications, thereby expanding the potential for automation and efficiency across sectors.