Your Ultimate Path to Voice AI

Pay as you go
- Free to start, then usage-based
- Telephony: Synthflow Twilio / Bring Your Own Telephony
- 5 concurrent calls, then $20/reserved concurrency
- Compliance (SOC2, GDPR, ISO 27001)
- Unlimited Agents, API & Integrations
- API Rate Limits: 30 requests/minute
- Support via Ticketing
Enterprise
- Guaranteed Uptime & SLA 99.99%
- SIP Trunking, Synthflow Native Telephony
- White Label & Reseller Toolkit
- Unlimited Concurrent Calls & Custom Workflows
- API Rate Limits: Custom + Priority
- Advanced Compliance: MSA support, geo-based sub-processing, on-premise multi-region deployment, flexible hosting options, and more.
- Enterprise Onboarding, Training, and Support




















Estimate your costs
10,000
Includes
Pick LLM
Pick Telephony

Compare Plans and Make the Right Choice
Everything You Need to Know About Synthflow’s AI Voice Agents
How much does Synthflow cost per minute?
Most pay-as-you-go (PAYG) setups fall between $0.15 and $0.24 per minute, depending on your LLM and telephony selections.
Is Synthflow AI free?
Yes — it’s free to create an account and build your agent. Usage charges apply only when you make calls or send messages.
How is usage calculated?
We meter usage per second, including voicemail. You are not charged for failed calls or post-transfer time.
Can I use Synthflow with my Starter, Pro, Growth, or Agency plan?
Yes. You can continue using Synthflow on any of the previous plans.
Can I use my own Twilio account?
Yes. Bring Your Own Twilio is free. You can also use Synthflow-managed Twilio for $0.02/min, or upgrade to Enterprise for Synthflow Native Telephony.
Can I white-label on PAYG?
Yes. White-labeling is available as an add-on for $2,000/month, and it is included in the Enterprise plan.
How do I scale concurrency?
PAYG includes 5 concurrency units by default. You can add more for $20/unit/month, or choose Enterprise for unlimited concurrency.
Does Synthflow AI have a free trial?
You can build and test your agent for free. To deploy to production, you’ll need to add your payment details.
How am I charged for minutes?
Successful calls are billed based on actual seconds used.
Am I charged for failed calls?
No. Failed calls incur no charges.