Ultravox - Third (and Final) Onboarding Email

No dark-mode styles — this email renders the same in a dark client.

This final onboarding email covers advanced Ultravox features including custom knowledge bases (RAG), call transfer tools, and
usage tracking to help you build more sophisticated voice AI agents. Ben offers personal time to review implementations and
discuss use cases, plus reminds you to check your usage against your 30 free minutes. Join the Discord community to share your
projects or use the Agent Quickstart if you haven't made your first call yet.

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Hey Emre,
 
This is the final email in our onboarding series, and we've covered a lot of ground already! Read on for some advanced Ultravox
features that will help you build more sophisticated AI voice agents, as well as information on where to find help if you need it.
 

 


Give Agents Contextual Knowledge with RAG

Retrieval-Augmented Generation (RAG) is a common technique for ensuring your agent refers to relevant and current information.
Ultravox Realtime provides built-in support for custom knowledge bases (we call them "corpora"). You can create corpora in
Ultravox by importing information from external data sources like product documentation, user guides, FAQs, or transcripts from
training videos.
 
RAG Overview → [https://docs.ultravox.ai/tools/rag/overview]
 

 


Call Transfers: Implement a Tool to Transfer Phone Calls

Sometimes you want your AI agent to hand off the conversation to a human. Learn how to use built-in call transfer tools or create
a custom tool that can transfer calls when needed.
 
Call Transfer Guide → [https://docs.ultravox.ai/telephony/call-transfers]
 

 


Quick Tip: Track Your Usage

You started with 30 minutes of free calls. To avoid any interruption in your development:
 * Check your current usage [https://app.ultravox.ai/settings/]

 * Add a payment method to pay-as-you-go, OR

 * Add a subscription

 
Ultravox Pricing → [https://ultravox.ai/pricing]


 



Building something exciting? Share it with other developers in our Discord community [https://discord.com/invite/Qw6KHxv8YB]!
 
Here's to creating more engaging AI conversations,
 
Ben
 
P.S. Haven't made your first call yet? Start with our Agent Quickstart
[https://docs.ultravox.ai/gettingstarted/quickstart/agent-console] - it takes less than 2 minutes!



https://x.com/FixieAI

https://github.com/fixie-ai

https://discord.com/invite/Qw6KHxv8YB

 
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nse/ultravox/2026-11-03/5985

From

Ben Lower · ben@ultravox.ai

Sent

3 November 2026 · 08:00 UTC