Developing a custom voice AI agent can be more cost-effective than using managed platforms like Vapi or Retell, especially at higher call volumes. A voice AI call involves five distinct services: telephony, speech-to-text, large language model, text-to-speech, and orchestration. While managed platforms charge around five cents per minute for orchestration, self-hosting on a platform like LiveKit can reduce this to one cent per minute. This cost difference, however, must be weighed against the engineering effort and potential upfront costs of building and maintaining a custom solution. For lower call volumes, managed platforms offer a faster and simpler deployment. AI
IMPACT Developers can optimize costs for voice AI agents by understanding the breakdown of services and choosing between managed platforms and self-hosting based on call volume.
RANK_REASON The article discusses the cost-effectiveness of different platforms for building voice AI agents, which falls under tooling.
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