Resources
Reference material for teams evaluating voice AI: what calls cost and why, how the architecture fits together, and the vocabulary the category runs on. Written to be quoted: every definition stands alone and every figure carries a source and a date.
Featured guide
What does a voice AI call cost per minute?
The four metered components inside every AI call, dated market figures from Vapi, Retell AI, Bland, and Synthflow, and how per-stage sourcing between Frontier mode, Local mode, and BYOK changes the math. The most-cited question in the category, answered with sources.
Guides
Voice agent architecture
Ears, brain, and voice: the STT, LLM, TTS pipeline, cascaded versus speech-to-speech models, and the orchestration layer.
Voice agent MCP server
What the Model Context Protocol is, and what a voice agent MCP server lets an AI assistant do.
All guides
The full blog index: voice AI economics, architecture, and developer surfaces, updated as the market moves.
Glossary
Ten plain-English definitions cover most of what buyers ask about voice AI: Frontier mode, Local mode, mix and match, sourcing mode, BYOK, Voice Studio, PeachDesk-hosted, self-hosted, voice agent, and orchestration. Each definition stands alone and links to the page that owns the topic.