Build AI Voice Agents.
In Minutes, Not Quarters.
A voice AI agent platform with the QA pipeline built in. Score every agent against your own test cases, and promote only what clears your threshold.
Powering intelligent agents across channels for modern businesses.
How it works
From a blank prompt to a live agent — no confusion, no delays.
Tell me who your agent talks to and what it should do — I'll turn it into a production-ready prompt.
Bring your own model.
Or pick from the best.
YuBuild never ties you to one provider. Swap the ASR, LLM, TTS, and telephony behind any agent — per agent, per environment — and plug in your own API keys or fine-tuned models.
Pick one provider per layer — your stack assembles live on the right.
Switch models per agent or per deployment environment. No migration, no re-platforming.
Everything you need to ship an agent
One platform to build, test, and run voice and messaging agents — end to end.
Write prompts like a product,not a text box.
Structure persona, rules and tools in a dedicated builder, and ground every answer in your own PDFs, URLs and structured data — so the agent never improvises facts.
Design multi-step conversationson a visual canvas.
Chain intents, conditions and actions as nodes. Branch on what the customer says, call tools mid-flow, and hand off to a human exactly where you decide.
Score every prompt and every call —automatically.
Write test cases against your prompts and run them before each deploy. Then let QA score every recorded call against your rubric, surfacing issues without listening to hours of audio.
One click from promptto a live number.
Tag any agent to a WhatsApp Business number or a phone line — inbound and outbound — on the telephony you already run. Go live in minutes, not weeks.
Version every prompt.Ship only the best one.
Never lose a working prompt again. Every edit is saved as a new version — compare, promote, and roll back with a Git-like history.
Softer opening, dispute fallback
Softened the opening line and added a fallback when the customer disputes the amount.
Two-question identity check
Tightened identity verification to two questions before discussing the balance.
Spanish handoff + politeness pass
Added a Spanish-language handoff and a politeness pass on refusals.
Payment-link tool wired in
First working prompt with the payment-link tool wired in.
Ship smarter
Connect Any Stack.
Run Any Model.
Plug into the providers and channels you already use — swap any of them without re-platforming.
Azure SpeechDeepgramGoogle STTWhisperAzure SpeechDeepgramGoogle STTWhisperAzure SpeechDeepgramGoogle STTWhisperAzure SpeechDeepgramGoogle STTWhisperAzure SpeechDeepgramGoogle STTWhisperAzure Speech
ElevenLabsAzureGoogleElevenLabsAzureGoogleElevenLabsAzureGoogleElevenLabsAzureGoogleElevenLabsAzureGoogleElevenLabsAzureGoogle
Google GeminiClaudeOpenAIGoogle GeminiClaudeOpenAIGoogle GeminiClaudeOpenAIGoogle GeminiClaudeOpenAIGoogle GeminiClaudeOpenAIGoogle GeminiClaudeEverything to know, before you build
What teams ask before building and shipping their first AI voice agent on YuBuild.