Introducing No-Code Flow Builder with Vogent

A visual way to build agents that follow logic and hit objectives—every time.

Designing a great voice agent isn’t just about conversation quality. It’s about structure. Especially in complex call flows—like scheduling appointments, verifying identity, or qualifying leads—you need your agent to follow the right steps every single time. That’s exactly what Flow Builder does.

Flow Builder is Vogent’s drag-and-drop interface for building structured voice agents with clear, logical flows. It gives you precision, visibility, and flexibility without having to write code.

This guide walks through what Flow Builder is, how it works, and how to build your first flow-powered agent.

What is Flow Builder?

Flow Builder is a no-code visual interface that lets you define how an agent should move through a call—question by question, function by function. Think of it like a dynamic, logic-powered roadmap for your AI agent.

You define the objective, build the path, and Flow Builder ensures the agent sticks to it.

It’s built to support call cases like:

1. Scheduling and intake

2. Lead qualification

3. Surveys

4. Step-by-step support flows

Your agents will always ask the right questions, hit the right APIs, and never skip the important stuff.

Example of a Flow Builder workflow

Building Your First Agent with Flow Builder

Here’s how to get started:

1. Create a new agent
Head to the Agents tab and click “New Agent.” You can start from scratch or clone one of our prebuilt flows.

2. Open the Flow Editor
Inside your agent, click “Edit” in the Flow section. This opens the Flow Builder UI—your control room for designing logic.

3. Add nodes

- Question nodes prompt the user and record answers (freeform, multiple choice, etc.).

- Freeform nodes let the agent say something casual or end the call smoothly.

- Function nodes hit external APIs or run logic—like pulling appointment availability.

- Say nodes say a predetermined line and move onto the next step immediately.

4. Test it
Once built, attach a phone number or run a test call from the browser. You can also run counterfactuals—retesting past calls using your new version to see how it performs.

Using Functions and APIs in Your Flow

Need to fetch live data or send info to another system? Flow Builder lets you integrate with external APIs using function nodes.

For example:
A function called get_availability might check a clinic’s calendar for open slots and return options the agent can share in real-time.

No need to manually wire things together—just add the node, plug in your function, and connect it to the rest of your flow.

Post-Call Extraction and Logs

Every Flow Builder agent supports post-call extraction using Vogent’s Extractor system. You define the data points you care about—like name, time slot, or insurance provider—and we’ll return them via webhook after each call.

You can view transcripts, call recordings, and extracted details in the Dials tab—great for QA, audits, or integrations with your backend.

Sync and Iterate—Fast

Flow Builder isn’t just for building once. It’s built for iteration.

1. Tweak questions or logic directly in the UI

2. Run counterfactuals on real calls to test performance

3. See how updates affect call outcomes in minutes

This means faster iteration, cleaner flows, and fewer bugs in production.

With Flow Builder, you get the power of logic-driven agents with the flexibility of a visual UI. No hallucinations. No skipped steps. Just real-world results—structured, auditable, and production-ready.

Start building with Flow Builder today in your Vogent dashboard.
Need help? Check the docs or book a demo.