Build Agents with Synthflow AI
The BELL workflow for building, evaluating, launching, and improving Synthflow agents
Meet your AI-powered voice agent. Synthflow AI helps businesses automate conversations by handling both inbound and outbound calls. Your agent can answer questions, engage customers, and streamline operations, so you can focus on what matters most.
Synthflow organizes the entire agent lifecycle around the BELL loop: Build, Evaluate, Launch, and Learn. This is the operating system behind every polished experience we deliver, a repeatable rhythm that helps teams move from idea to world-class conversations without losing speed or quality.
Design and integrate voice agents. Define, connect, and shape behavior in a clear, reviewable flow. Keep logic predictable so your team can trust every path.
Simulate and evaluate before going live. Run realistic conversations in safe environments, validate flows end-to-end, and add checks that reflect your domain and compliance needs.
Deploy and scale with confidence. Govern rollouts, trace behavior with execution logs, and manage releases with the ability to safely roll back. Integrate cleanly into your applications and systems.
Monitor and improve continuously. Close the loop with insights, spot gaps, and refine flows. Track usage, performance, and outcomes to keep quality high over time.
Synthflow integrates with many platforms to fit into your stack. The full catalog lives on Integrated platforms; a few popular starting points:
Move from product overview into implementation details:
Additional resources outside the main docs:
No. The agent uses the name you give it in the prompt, not the label you assign in settings.
For example, if you name your agent “AI Call agent for ACME” in settings but name it Derreck in the prompt, it introduces itself as Derreck to customers.
Yes. The selected voice should match the language your agent is using.
The default advanced settings are tuned for the best overall quality. Make only small adjustments unless you have a clear reason to change them.
Voicemail detection is strong, but some voicemail recordings, especially ones using the customer’s own voice, can still pass through. If voicemail handling is important, switch the Voicemail Detection setting to Time based.
Inbound agents do not know who is calling before the call starts, so they cannot rely on caller-specific variables up front. If you need external context, use a Custom Action that fetches it during the call.
Yes. You can start from the built-in template section or use Copilot to help draft a prompt.
Custom telephony apps are not currently available on plans below Enterprise.
No. Synthflow does not currently expose subaccount minute usage through the API.
Subaccounts share the main agency account’s minutes unless you place the subaccount on Pay As You Go through the pricing-plan setup.
Billing happens on your renewal date. You can find the exact date under Settings > Plan and billing in the Next billing section.
No. Entire subaccounts cannot currently be imported or exported between agencies.
Provide a valid Australian address. Once that is on file, you can purchase an Australian number.