Synthflow: enterprise voice agents for contact centers

Contents

1. What Synthflow does
2. Published evidence
3. Strengths and limits
4. Pricing
5. Questions to ask Synthflow
6. Sources

Type	Enterprise voice-agent platform
Pricing	Not published
Website	synthflow.ai

Synthflow builds AI voice agents that answer and make calls for contact centers, outsourcers and multi-location brands. It is sold only on annual enterprise contracts⁠12Enterprise AI voice agents for phone callsSynthflowEnterprise AI voice agent pricingSynthflow.

Best for: Contact centers and multi-location brands that want custom voice agents inside their phone system, implemented with the vendor’s engineers.

Not the right fit for: Small and mid-sized companies looking for a ready-made receptionist with a monthly price.

What Synthflow does

Synthflow's agents work inside the customer's phone system, resolve routine requests end to end and update the CRM during the call⁠1Enterprise AI voice agents for phone callsSynthflow. Each contract is scoped around call volume and concurrency, routing, escalation paths and handoffs, telephony (its own, SIP trunking or approved enterprise systems), CRM, calendar and contact-center integrations, security review and, where included, launch by its forward-deployed engineers⁠2Enterprise AI voice agent pricingSynthflow. The company says it handles more than a million calls a day in more than 30 countries⁠2Enterprise AI voice agent pricingSynthflow.

Published evidence

• Batteries Plus. Runs Synthflow voice agents inside Zoom Phone across more than 700 US locations. Vendor-published customer story.⁠1Enterprise AI voice agents for phone callsSynthflow

Strengths and limits

Strengths

• Built for volume: the company says it handles more than a million calls a day.
• Works inside existing phone systems, including SIP trunking and enterprise telephony.
• Implementation by its own engineers where the contract includes launch support.

Limits

• No free plan, trial or per-minute price.
• A platform to build on rather than a ready-made receptionist.

Choose another option if: You want a receptionist running this month at a published price.

Pricing

Not published: annual enterprise agreements only.

Questions to ask Synthflow

• What is the minimum contract, and at what call volume does it make sense?
• What does launch support include, and how long does it take?
• How are escalations to people designed and measured?
• What do we own if we leave: prompts, flows, recordings?

See how Synthflow compares with the other options in the main guide.

Sources

1. Enterprise AI voice agents for phone calls. Synthflow. Accessed 8 Nov 2026.
2. Enterprise AI voice agent pricing. Synthflow. Accessed 8 Nov 2026.

Further reading

• Buyer's guide · Updated quarterlyThe best AI phone receptionists in 2026An analysis of nine ways to answer a company's phones with AI, from ready-made receptionists to human services and voice-agent platforms, judged on what happens to the call after it ends.
• Guide · Receptionist and CRMHow to connect an AI receptionist to your CRM and calendarAn AI receptionist that answers well but leaves the CRM untouched has moved the typing from the phone to the inbox. This is how the integrations differ, and how to test them.
• Guide · CostAI vs human receptionist: what each really costs in 2026Pricing units in this market (salaries, minutes, calls, unique callers, platforms) make options hard to compare. This guide puts them on the same footing.