Voice

Spokestack

Open-source SDK for building on-device, privacy-first voice assistants and smart speakers.

Overview

Spokestack provides a modular, cross-platform voice SDK with wake-word detection, STT, NLU, and TTS capabilities that run entirely client-side or hybrid. It supports iOS, Android, Flutter, and web, with easy LLM integration.

Best for

local voice assistants
cross-platform mobile voice apps
privacy-compliant IoT

Trade-offs

vs Vapi

Spokestack excels at on-device, offline voice pipelines; Vapi is better for cloud-hosted, low-latency conversational agents with LLM routing.

What XeroHack pre-wires

When you pick Spokestack in the interview, the engine emits these files into your scaffold:

Flutter voice widget
wake word model loader
hybrid cloud/local pipeline

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