Synthflow
AI voice agents that answer and make calls for contact centers and BPOs
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Pricing
Contact for pricing
API
Yes
Company
Synthflow AI
Platforms
What is Synthflow?
Synthflow is an enterprise platform for AI voice agents that answer and make phone calls for contact centers, BPOs and multi-location brands. The agents handle routine requests from start to finish, including support questions, appointment booking, lead qualification, routing, reminders and after-hours calls. They update the CRM while the call is still going.
The agents run inside the phone systems companies already use, with built-in connections for Zoom, Five9, RingCentral, 8x8, Twilio, Telnyx, Vonage and Freshcaller. They read and write Salesforce, HubSpot, Zendesk and Freshworks among 200+ integrations. Callers can interrupt the agent, switch languages mid-call, or ask for a person, who receives the full transcript. Synthflow also runs its own telephony and shows SIP ladders and quality scores for each call.
Synthflow is sold only as an annual enterprise agreement. Workspaces can be hosted in the US or EU, and the company holds SOC 2 Type II and ISO 27001 certifications.
Key features
- Inbound and outbound AI phone calls with sub-0.5s response
- Warm transfer to humans with full transcript
- Mid-call language switching and interruption handling
- Built-in connectors for Zoom, Five9, RingCentral, Twilio and others
- Reads and updates Salesforce, HubSpot, Zendesk during calls
- Own telephony with SIP ladder and packet capture visibility
- Pre-launch test calls with AI-suggested fixes
- SMS, WhatsApp and web chat agents
Use cases
Who it's for
Contact center automation
Handle routine support calls end to end and pass complex ones to agents with context. Freshworks reports up to 65% of routine calls automated.
Multi-location store phones
Answer store calls inside an existing phone system so staff can focus on in-person customers, as Batteries Plus does across 700+ locations.
Appointment booking and reminders
Book appointments through connected calendars and place reminder or follow-up calls.
White-label voice AI for BPOs
Run branded workspaces for each client and track them in one analytics dashboard.
Synthflow pricing
From the vendor's site, checked Nov 8, 2026; we re-check prices monthly. Prices change — confirm on their pricing page.
Enterprise
annual
Custom
- Scoped to call volume, telephony, integrations, security and launch support
- Custom concurrency planning and escalation paths
- Optional forward-deployed engineers for launch
- White-label available for BPOs and platforms
Get an email when Synthflow changes its prices
One mail per change, a stop link in each. Nothing else.
How Synthflow compares
- Synthflow has no free plan, while 2 of the 4 alternatives below have one.
| Tool | Starts at | Free plan | Free trial | API | Open source | |
|---|---|---|---|---|---|---|
| SSynthflow | Quote | — | — | — | ||
V Vapi | $29/mo | — | Synthflow vs Vapi | |||
R Retell AI | — | — | — | Synthflow vs Retell AI | ||
B Bland AI | $299/mo | — | — | Synthflow vs Bland AI | ||
P PolyAI | Quote | — | — | Synthflow vs PolyAI |
The closest alternatives in our directory by category. “Starts at” is the cheapest paid plan per month, as each vendor lists it.
Pros and cons
Strengths
- Works with existing phone numbers and carriers
- 200+ integrations including major CRMs and help desks
- SOC 2 Type II, ISO 27001, PCI DSS compliance and HIPAA BAA
- US or EU data residency chosen at setup
Limitations
- No free plan, trial or per-minute pricing
- Sold only as an annual enterprise contract
- SMS and WhatsApp agents limited to US workspaces
- Genesys Cloud requires a custom Enterprise setup
Synthflow FAQ
How much does Synthflow cost?
It is sold as an annual enterprise agreement priced on call volume, phone system, integrations, security needs and launch support. There is no per-minute rate.
Is there a free plan or trial?
No. Synthflow has no free plan or trial.
Can I keep my phone numbers?
Yes. It connects to Zoom, Five9, RingCentral, 8x8, Twilio, Telnyx, Vonage and Freshcaller. Genesys Cloud and other SIP systems connect through an Enterprise setup.
Can the agent hand a call to a person?
Yes. It transfers the call and passes the full transcript so the team knows who is calling and why.
Where is data stored?
You choose a US or EU workspace at setup. Retention controls can delete recordings, transcripts and caller IDs after 30 days.
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Synthflow
Contact for pricing
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