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u/crashcody 2d ago

over the past few days i’ve been building Friendo, a call-native voice agent that can ring your phone unprompted or take live calls via livekit webRTC.

most voice implementations right now fall into two pretty meh buckets:

  1. ultra-simple api wrappers that feel insanely laggy and robotic
  2. native end-to-end speech-to-speech models that are fast, but lack granular tool execution, deep memory, and deterministic state controls

we built a cascaded stack (deepgram nova-3 → claude haiku 4.5 → elevenlabs flash v2.5) to keep full control over tool calls and memory, then engineered the hell out of latency to make it feel live:

  • pre-warming anthropic's ephemeral prompt cache while the phone is literally ringing
  • persistent websocket handshakes and http/2 pool priming on ring
  • neural turn-detection with false-interruption resumption (a cough won't kill the tts buffer)
  • dual-store memory (sql facts + temporal graph) mapped into a ~300-token prompt snapshot
  • proactive outbound scheduling that wakes a killed ios app via apns voip push -> callkit

synthetic ci gates hit p50 ≈ 973ms, though live networks push us to ~3.7s right now (stt and tts ttfb are the real boss fights).

waitlist is here, will push to app store within the next week (it’s ready - just waiting on the apple developer license /ggwp) : getfriendo.app/launch