Billing Overview
Understand how billing works at Synthflow
Synthflow offers flexible pricing designed to scale with your needs. Explore the platform for free, then add a payment method when you’re ready to make calls or use chat.
We offer two plans to suit different needs:
Usage-based: billed per LLM and for the voice engine. Ideal for builders, pilots, and small-scale deployments.
Purpose-built for teams handling 10,000+ minutes per month with enterprise-grade reliability and support.
For a detailed comparison, visit our pricing page. The pricing page also includes a cost calculator to help you estimate costs based on your expected call volume and requirements.
We previously offered Pro and Agency plans. These plans are being phased out and will no longer be available for new subscriptions.
If you’re currently on a Pro or Agency plan, your subscription remains fully supported. Your pricing, features, and service level will continue unchanged. There is no action required on your part.
For new subscriptions, we recommend Pay As You Go for most use cases, or Enterprise for high-volume deployments.
When you first sign up, you can explore the platform without a payment method. You can create and configure agents, use the flow designer, add knowledge bases, integrate external applications, and preview voices. However, to make calls or use chat agents, you’ll need to add a payment method.
Adding a payment method automatically subscribes you to the Pay As You Go plan at $0.00 per month. You won’t be charged until you start making calls or using chat agents.
If you’re based in the European Union, add your VAT number during setup to avoid being charged additional VAT. You can add it later in the Billing Portal.
Your current used minutes are shown in the sidebar. For more detail, use the Usage dashboard under Settings > Plan & Billing — total events, total cost for a period, and breakdown by date and by provider. See usage and billing for how we measure and charge.
Agency accounts can view usage per subaccount in the Agency dashboard.
All billing and subscription management happens in Settings > Plan & Billing. From there you can:
Learn more about managing your billing information.
If you’re running an agency with subaccounts, you can set up your own pricing plans and rebill your clients. Connect your Stripe account to create custom plans with included minutes, usage-based overage, and bundled products.
Learn more about pricing plans and rebilling.
Yes. You can explore the platform, create agents, use the flow designer, add knowledge bases, integrate external applications, and preview voices—all without a payment method. However, making calls and using chat agents requires a payment method.
We accept all major credit and debit cards through our payment processor, Stripe.
Yes. You can upgrade to Enterprise at any time by contacting our sales team. If you’re on Enterprise and want to switch to PAYG, contact your account manager.
You can view and download all invoices from the Billing Portal. Go to Settings > Plan & Billing and click Billing Portal.
You can cancel anytime from the Billing Portal. Your access continues until the end of your current billing period.