- Caller One boerewors roll and two samoosas, please.
- HeyHi Voice One boerewors roll and two samoosas. That’s R96, ready in 20 minutes.
HeyHi Voice
An AI voice agent that answers your phone and makes your calls.
HeyHi Refine
Keep your AI accurate, accountable and improving on its own.
HeyHi Refine tests your prompts against real cases and whole simulated conversations, rewrites them automatically and keeps a new version only when it beats the old one. Every run is monitored and every change is kept in an audit trail.
From 62% 96%
What it does
What HeyHi Refine does.
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Prompts that improve themselves
It diagnoses why a prompt fails, writes several rewrites and tests each one. A rewrite replaces the prompt only if it still wins on a full, averaged test.
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Accuracy you can measure
Test cases with exact checks or AI-judged rubrics, and every score averaged over several runs, so one lucky run never counts.
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Whole conversations, tested
A simulated caller plays the person on the other end, including the awkward questions, before your AI meets a real one.
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Monitoring built in
Every run can be sent to your observability tools, with each model call traced.
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Evidence for AI governance
A tamper-evident audit log of every change and run, and an evidence report organised around the NIST AI Risk Management Framework.
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Works with the models you use
OpenAI, Anthropic, Google, Amazon Bedrock, Azure, Mistral, local models and any OpenAI-compatible endpoint.
How it works
How HeyHi Refine works.
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Add your prompt and test cases
Single replies or whole conversations, each with the checks it has to pass.
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Run it
It scores the prompt, diagnoses the failures and tries better versions.
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Keep the winner
The best version replaces the prompt, with every step recorded and one click to undo.
Coming soon
Be first in line for HeyHi Refine.
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HeyHi Sales
An AI sales team that finds the right people and starts the conversation.