Workflow builder for realtime voice agents

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Hi HN - we’ve been working on a new UX for building realtime voice agents with minimal code. We’ve built a ton of voice agents in the past few years. We noticed that voice agent dev follows a pretty typical pattern: ⁃ Start with a “single prompt” version that dumps all relevant context and instructions into a one prompt, and provide access to all necessary tools the agent will ever need ⁃ As the agent gets more complex and users discover more edge cases, break the single-prompt version out into a more complex structure that gives a user more control over the precise conversational flow. There’s a pretty high ceiling for how complicated things can get with real-world systems. We’ve been building https://www.voicekit.com/ for this workflow. It’s a full-featured (though minimal for now) platform for making and receiving phone calls with LLM-based agents. You can buy phone numbers, connect them to LLM-based workflows with access to HTTP-based tool calls, make outbound phone calls via API, and monitor calls in a simple dashboard. Our intended workflow is for folks to start with the single prompt “simple mode”, and graduate into advanced mode over time - but to provide a simple UX that works well for both cases. We’d love to hear your feedback.

Visit product View on Hacker NewsJun 18, 2025

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nativeThis product was originally launched on this platform.

AppSumoStrong fit for a featured deal · Strong signals: platform, builder, users · Missing: plus, intuitive, reviews

51%51% predicted probability of success on AppSumo, based on ML models trained on real launch data.

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0%0% predicted probability of success on BetaList, based on ML models trained on real launch data.

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