Voice agent platform · by Synthflow
Synthflow
Enterprise voice AI platform for automating phone calls, with chat and SMS, aimed at operations and engineering teams.
Synthflow in one paragraph
Synthflow is a full-stack voice AI platform for automating enterprise phone calls across inbound and outbound flows. Synthflow says its agents handle routing, appointment booking, voicemail detection and SMS follow-ups, with CRM and ERP integrations and multi-language support. The vendor says it runs its own telephony network with sub-100 ms latency and 99.99% uptime, and reports 500M+ customer calls and 65M+ voice calls per month across 30+ countries. It also offers agents across voice, chat and SMS from one platform, with testing, monitoring and a visual flow designer.
How does Synthflow bill?
Synthflow publishes one enterprise tier: contracts start at $30,000 annually, with final pricing scoped around call volume, concurrency, telephony setup, integrations, security needs and launch support. Separately, its FAQ describes a pay-as-you-go model for self-serve users: building an agent is free, and billing starts at launch, charging only for actual calls and chats conducted. No per-minute or per-call rate is published, so exact usage costs require a sales conversation.
| Plan | Price | What’s included |
|---|---|---|
| Enterprise | Starts at $30,000 annually | Enterprise SLA, native telephony or SIP trunking, custom concurrency, CRM/calendar/contact-center integrations, security review, implementation and launch support |
| Pay-As-You-Go (PAYG) | Pay for actual calls and chats conducted | Applies when launching a self-built agent; build for free with templates first |
What happens when Synthflow can’t answer?
Built-in human handoff when needed; agents can escalate to a human, transfer urgent calls to the right team, and handoff triggers can be controlled based on failed attempts or sentiment.
Booking and scheduling
AI appointment booking and appointment setter use cases; agents schedule appointments, demos and viewings, with reminders and follow-ups.
Connects with
- Cisco
- Avaya
- Genesys
- RingCentral
- Freshcaller
- Freshdesk
- Freshservice
- Google Cloud
- Zapier
- HubSpot
- Cal.com
- GoHighLevel
- Salesforce
Languages: Multi-language support; site available in English and Deutsch; one deployment handled English & Spanish calls.
Where it’s strong
- In-house telephony network with claimed sub-100 ms latency and 99.99% uptime, plus SIP/PBX compatibility
- Named enterprise integrations including Cisco, Avaya, Genesys, RingCentral, Salesforce, HubSpot and the Freshworks suite
- Compliance claims covering SOC 2, HIPAA, PCI DSS and GDPR with encryption and audit logs
- Free agent building with templates before any pay-as-you-go charges begin
Watch-outs
- No self-serve monthly plan or per-minute rate is published; enterprise contracts start at $30,000 annually
- Final pricing depends on scoping factors like call volume, concurrency and telephony setup, so total cost is unclear upfront
- Pay-as-you-go rates for calls and chats are not stated anywhere in the text
Pick it or skip it
Pick Synthflow if: An enterprise team that wants to automate high-volume phone calls with its own telephony control, compliance needs and CRM integrations should shortlist Synthflow.
Skip it if: A small business wanting transparent, low-cost monthly pricing or a published per-minute rate should look elsewhere.
Test-call log
Status: not yet tested. We run the same 12-call script on every phone product and publish the transcript notes here. Vendors can’t pay to change results.
Synthflow: quick answers
How much does Synthflow cost?
Enterprise contracts start at $30,000 annually. Final pricing is scoped around call volume, concurrency, telephony setup, integrations, security needs, and launch support. No lower monthly plan is published.
Does Synthflow offer a free trial?
Yes, in a limited form. You can build your AI agent for free using industry templates or custom flows, with no upfront cost. Billing starts when you launch the agent, on a pay-as-you-go basis for actual calls and chats.
Can Synthflow hand calls off to a human agent?
Yes. Synthflow says its agents include built-in sentiment analysis and human handoff when needed, can transfer urgent calls to the right team, and let you control handoff triggers based on failed attempts or sentiment.
What integrations does Synthflow support?
Synthflow lists 200+ integrations and names Cisco, Avaya, Genesys, RingCentral, Salesforce, HubSpot, Cal.com, GoHighLevel, Zapier and Google Cloud. It also partners with Freshworks for voice AI inside Freshcaller, Freshdesk and Freshservice.
Is Synthflow HIPAA compliant?
Synthflow says its infrastructure is certified across SOC 2, HIPAA, PCI DSS and GDPR, with full encryption, audit logs and region-based hosting. Its FAQ also states it meets HIPAA and GDPR compliance standards.
Does Synthflow support appointment booking?
Yes. Appointment booking and AI appointment setter are listed use cases, and agents can schedule appointments, demos and viewings, send reminders and follow-ups, and update CRM records.
Receipts: the quotes behind this profile
Each line is copied from Synthflow’s own pages and was checked automatically against the page text on 28 October 2026.
| Claim | Vendor’s words |
|---|---|
| Enterprise contracts start at $30,000 annually | Enterprise contracts start at $30,000 annually. Final pricing is scoped around call volume, concurrency, telephony setup, integrations, security needs, and launch support. |
| Free to build an agent, PAYG billing at launch | Yes, you can start and build your AI agent for free using our library of industry templates or build your own. |
| Pay only for actual calls and chats conducted | you start to use a Pay-As-You-Go (PAYG) model: you only pay for the actual calls and chats conducted. |
| Certified across SOC 2, HIPAA, PCI DSS, GDPR | Synthflow’s infrastructure is certified across SOC 2, HIPAA, PCI DSS, and GDPR — with full encryption, audit logs, and region-based hosting built into every release. |
| Connects with Cisco, Avaya, Genesys, RingCentral | Synthflow connects directly with your enterprise systems: Cisco, Avaya, Genesys, RingCentral, and more. |
| Integrates with Google Cloud, Zapier, HubSpot | Synthflow connects to CRMs, ERPs, and platforms like Google Cloud, Zapier, and HubSpot. |
| Footer lists Cal.com, GoHighLevel, HubSpot, Salesforce, Zapier | * Cal.com * GoHighLevel * HubSpot * Salesforce * Zapier |
| Freshworks partnership inside Freshcaller, Freshdesk, Freshservice | Freshworks and Synthflow now offer real-time Voice AI inside Freshcaller, Freshdesk, and Freshservice |
| Built-in sentiment analysis and human handoff | They also work after hours and support multilingual calls, with built-in sentiment analysis and human handoff when needed. |
| Handoff triggers based on failed attempts or sentiment | They can ask clarifying questions, offer alternate responses, or escalate to a human. You can control handoff triggers based on failed attempts or sentiment. |
| Agents across voice, chat, SMS and more | Design, deploy, and manage AI agents across every channel — voice, chat, SMS, and more — all from one platform. |
| WhatsApp integration listed | WhatsApp Integration |
| 500M+ customer calls | 500M+ Customer Calls |
| 65M+ voice calls monthly in 30+ countries | Powering over 65M+ voice calls every month in 30+ countries |
Commercial relationship: none. We have no paid or affiliate relationship with this vendor today. Disclosures.
Where these facts come from
- Synthflow: homepage (synthflow.ai)
- Synthflow: /pricing (synthflow.ai)