> For a complete page index, fetch https://docs.synthflow.ai/llms.txt. For full documentation content, fetch https://docs.synthflow.ai/llms-full.txt. # Build Agents with Synthflow AI > Learn the Build, Evaluate, Launch, and Learn workflow for creating, testing, deploying, 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. [Aurora](/aurora) is the workspace assistant built into the dashboard. Describe what you want in natural language to scaffold agents, query calls, manage knowledge, run simulations, and update existing agents without hunting through every menu. ## The BELL framework 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. ![BELL framework overview](https://storage.googleapis.com/granular-changelog/doc-images/BELL.png) ### Build 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. * [Aurora](/aurora) for scaffolding agents from descriptions or attached files * [Claude Code](/anthropic) and [Codex](/openai) connectors for managing Synthflow from your AI tool * [Create an Agent](/create-an-agent) * [Call flow designer guide](/flow-designer) * [Knowledge base](/knowledge-base) * [Voice](/voice-configuration) * [Actions](/actions-overview) ### Evaluate 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. * [About simulations](/simulations) * [Custom evaluation workflows](/create-a-custom-evaluation) ### Launch 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. * [Integrated platforms](/about-integrations) * [Webhooks](/webhooks) ### Learn 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. * [Analytics](/collect-analytics) * [Export call data](/export-call-data) ## Integrations Synthflow integrates with many platforms to fit into your stack. The full catalog lives on [Integrated platforms](/about-integrations); a few popular starting points: * [WhatsApp Business Calling](/whatsapp-business-calling) for inbound voice experiences inside WhatsApp Business. * [Salesforce](/integrate-with-salesforce) for CRM workflows and customer context. * [Stripe](/stripe-overview) for whitelabel billing and subaccount pricing. * [HubSpot](/hubspot) for marketing, CRM, and workflow automation. ## Quick links Move from product overview into implementation details: * [Developer](/getting-started-with-your-api) for the API introduction and authentication flow. * [Concurrent calls](/cuncurrency-calling-limits) for rate limits, queueing, and capacity planning. * [Whitelabeling](/agency-whitelabel-dashboard) for agency and reseller setup. * [Billing](/billing) for subscription and invoice management. ## More resources Additional resources outside the main docs: * [YouTube](https://www.youtube.com/@SynthflowAI) for product walkthroughs, feature releases, and customer stories. * [Help Center](https://helpcenter.synthflow.ai/) for support-led troubleshooting content. * [Academy](https://academy.synthflow.ai/home) for guided training and video tutorials. * [Changelog](https://feedback.synthflow.ai/changelog) for release notes and product updates. * [Status](https://status.synthflow.ai/) for live service availability. ## FAQ #### Will the agent use the name I set in configuration? 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. #### Does the voice need to match the language? Yes. The selected voice should match the language your agent is using. #### Why do advanced voice tweaks change quality? The default advanced settings are tuned for the best overall quality. Make only small adjustments unless you have a clear reason to change them. #### Why is my agent reaching voicemail? 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`. #### Why can't inbound agents use variables? 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. #### Are there Synthflow prompt templates? Yes. You can start from the built-in template section in the agent editor, or use [Aurora](/aurora) to draft and refine a prompt. #### Can I use my own telephony app? Custom telephony apps are not currently available on plans below Enterprise. #### Can I query subaccount minutes via API? No. Synthflow does not currently expose subaccount minute usage through the API. #### Do subaccounts get their own minutes? Subaccounts share the main agency account's minutes unless your account setup assigns usage through a pricing plan. #### How are concurrent call limits shared? Concurrency is tied to your plan, and accounts plus subaccounts share the main account total. Agency concurrency is set by your account terms. If you need more capacity, contact sales. #### When does billing occur each month? Billing happens on your renewal date. You can find the exact date under **Admin** → **Workspace Settings** → **Plan & Billing** in the **Next billing** section. #### Can I move a subaccount between agencies? No. Entire subaccounts cannot currently be imported or exported between agencies. #### How do I buy an Australian number? Provide a valid Australian address. Once that is on file, you can purchase an Australian number.