AI voice agents that work inside your phone system.

Synthflow’s AI voice agents answer and make phone calls for contact centers, BPOs and multi‑location brands. They resolve routine requests end to end and update your CRM during the call.

Inbound call 0:33

  1. Caller

    My order just arrived broken. Can you send a new one?

  2. Replacement ordered Salesforce
  3. Synthflow agent

    I’m sorry. A new one ships today and arrives Thursday.

  4. Tracking link sent WhatsApp

Resolved without a human

Answering calls for

  • 1M+

    Calls a day

  • 99.99%

    Platform uptime

  • 100+

    Enterprise customers

Batteries Plus runs Synthflow on Zoom Phone across more than 700 US locations

Read the story
Batteries Plus associates help customers in one of its stores.
Locations on Zoom Phone
700+
Watch the film Batteries Plus on Zoom Phone · 5 min

Edison, the voice agent Batteries Plus built with Synthflow, answers its stores’ calls inside Zoom Phone.

“We’re giving our store teams the ability to devote their undivided attention to the people who walk through our doors.”

Jon Sica, President, Batteries Plus
From kick-off to pilot
5 weeks
Agent response time
Under 0.5 s
On every warm transfer
Full transcript

More customers

All customer stories

Freshworks

Freshworks' team at the Nasdaq podium, the Freshworks logo behind them
Calls automated
Up to 65%

Up to 65% of routine calls handled by AI alone, and 75% shorter waits.

“By integrating Synthflow’s real‑time voice automation, Freshworks customers can now modernize voice support, reduce manual effort, and deliver frictionless conversations at scale.”

Yash Sharma, Senior Product Manager, Freshworks
Shorter waits
75%

Thryv

Rob Hayden of Thryv
Calls answered
100%

100% of calls answered, day and night, and live in production in about a month.

“Within a month we were in production — and what started as an efficiency play turned into a revenue opportunity.”

Rob Hayden, Global Manager, AI Innovation, Thryv
To production
1 month

Calls that sound like your best rep, on a line you control

Callers get a quick answer on a clear line, and nobody repeats themselves when a person takes over.

  • Answers in under half a second

    When a caller stops talking, the agent replies within half a second, so the call never feels like waiting on a machine.

  • Interrupt, switch language, ask for a person

    Callers can cut in, and the agent lets them. They can change language halfway through, and the agent keeps up. When they ask for a person, the agent passes over the full transcript, so your team picks up knowing who is calling and why.

  • Phone calls first, on every channel

    Synthflow is built for phone calls. SMS and WhatsApp chat agents are available in US workspaces; web chat is available in all regions.

Works with the systems you run

Keep your numbers, your carrier and your contact center: the agent works with them as they are, and reads and writes your CRM, help desk and calendar during the call, through 200+ integrations.

All integrations

Your phone system

Built‑in connections for Zoom, Five9, RingCentral, 8x8, Twilio, Telnyx, Vonage and Freshcaller. Genesys Cloud and other SIP-compatible carriers or office phone systems connect through an Enterprise setup scoped to your requirements.

  • Zoom
  • Five9
  • RingCentral
  • 8x8
  • Genesys
  • Twilio
Synthflow

Your business systems

The agent reads and updates them during the call, and hands the caller to your team when they need a person.

  • Salesforce
  • HubSpot
  • Zendesk
  • Freshworks
  • APIs
  • Webhooks

Synthflow’s own telephony

Synthflow runs its own telephony infrastructure, with routing configured for your workspace’s region, and you can see every step of the call.

Our telephony servers

Inbound call

US regionLength 2:17

  • Zoom Phone
  • Synthflow · US
  • Your team
  1. Zoom Phone → Synthflow · US INVITE Rings in
  2. Synthflow · US → Zoom Phone 200 OK Answered
  3. The call Call audio, 2 min 17 s
  4. During the call Case updated in Salesforce
  5. Synthflow · US → your team INVITE With the reason
  6. Your team → Synthflow · US 200 OK Picked up
You see every call’s SIP ladder, packet capture and quality scores.
  • US
  • EU
  • Latin America · Regional point of presence

Live in weeks, not a
six-month project

Where your agreement includes launch support, Synthflow’s engineers map your calls, connect your systems, test and launch with your team.

In a glass-walled meeting room, an engineer maps a phone call flow on a whiteboard while the customer's team lead follows

“From kick-off to pilot, the roll‑out with Synthflow and Zoom was just five weeks.”

Kranthi Malreddy, Chief Information Officer, Batteries Plus
  • Engineers build it with you

    With launch support in your agreement, Synthflow’s engineers work with your team from the first call to launch.

  • Your phone system stays

    Your numbers and call flows stay as they are, and the agent takes calls within them.

  • Tested on your own calls

    Your own cases run before the first caller hears the agent.

Each plan is built around how your team takes calls.

Book a demo

Certified security, hosted in the US or EU

Synthflow arrives at your security review already audited and certified, with workspace data and processing kept in the region selected at setup.

  • SOC 2 Type II Audited

    An independent audit of how Synthflow keeps data safe, tested over time.

  • ISO/IEC 27001 Certified

    The international standard for managing information security.

  • PCI DSS v4.0.1 Compliant

    The card industry’s security standard for payment card details.

  • HIPAA Signed BAA

    A business associate agreement (BAA), the contract HIPAA requires before a vendor handles patient data.

  • GDPR Terms with a DPA

    A data processing agreement (DPA), the contract GDPR requires before a vendor handles personal data.

The audit reports are in the Trust Center.

Visit the Trust Center

Workspace setupData and retention

Your region

United StatesEuropean Union

Selected when the workspace is created

Synthflow workspace data and processing stay in the EU.

Agent data retention

Deletes recordings, transcripts and caller IDs automatically after 30 days.

Choose a US or EU workspace at setup to keep Synthflow workspace data and processing in that region. Connected providers can process some requests elsewhere. Agent-level retention controls can delete recordings, transcripts and caller IDs automatically after 30 days.

Found, fixed and verified before anyone calls

Every agent is tested before it goes live, released step by step with your approval, and measured on every call after.

Missed the time · 0:12

Caller

Can someone call me back at 9:30 tomorrow?

Synthflow agent

I’ll file your request so the team sees it first thing when they open at 8 a.m.

AI suggestion from the 18 calls that missed the time

If a caller names a time for a callback, put that exact time in the request and read it back.

The same 40 test calls, run again

40 of 40 passed

Before 22
After 40
Ready to go live

Before your demo

Ask us anything else when we talk.

Book a demo
What is Synthflow?

Synthflow is an enterprise conversational AI platform whose AI voice agents handle calls for contact centers, BPOs and multi‑location brands, inside the phone systems and CRMs they already run. Its agents answer and make calls, handle contextual routing, book appointments, detect voicemail and send SMS follow-ups.

What is an AI voice agent?

An AI voice agent is a conversational AI system that can answer, make and manage phone calls using natural language. It can understand what a caller is asking, respond in real time, collect information, route calls, book appointments, update systems and trigger follow-up actions.

Unlike a traditional IVR or scripted chatbot, an AI voice agent can hold more natural conversations and adapt to the caller’s needs. This allows businesses to automate routine phone interactions while keeping the experience fast, consistent and easy for customers.

How do Synthflow AI voice agents work?

Synthflow AI voice agents use conversational AI to understand callers, respond naturally and complete actions during a phone call. They can be trained around specific business workflows, connected to existing tools, and configured to handle tasks such as answering questions, booking appointments, qualifying leads, routing calls and updating CRM records.

When a call comes in, the AI voice agent listens to the customer’s request, identifies the intent, follows the relevant workflow and either resolves the call or escalates it to a human team when needed. This allows businesses to automate routine calls while keeping control over call workflows, customer experience and operational performance.

What types of phone calls can Synthflow automate?

Synthflow can automate a wide range of inbound and outbound phone calls, including customer support inquiries, appointment booking, lead qualification, call routing, reminders, follow-ups, FAQs, order updates and after-hours call handling.

Its AI voice agents can also support more complex workflows, such as updating CRM records, collecting caller information, transferring urgent calls to the right team and triggering next steps after the conversation. This makes it useful for businesses handling high call volumes across customer service, sales, operations and support.

Will it work with our phone system and keep our numbers?

Yes, and you keep your numbers. Synthflow has built‑in connections for Zoom, Five9, RingCentral, 8x8, Twilio, Telnyx, Vonage and Freshcaller. Genesys Cloud and other SIP-compatible carriers or office phone systems connect through an Enterprise setup scoped to your requirements.

Does it update our CRM?

Yes. It reads and updates Salesforce, HubSpot, Zendesk and Freshworks during the call, among 200+ integrations, and connects to your own systems through APIs and webhooks.

How is Synthflow priced?

As an annual enterprise agreement, scoped to your call volume, phone system, integrations, security needs and launch support. It has no free plan or trial and no rate by the minute. The pricing page has the details.

How fast can we go live, and who builds it?

In weeks: Batteries Plus went from kick‑off to pilot in five. Where your agreement includes launch support, Synthflow’s engineers build and test it with you.

Can it hand a call to a person?

Yes. The agent transfers the call and briefs your team on who is calling and why.

What happens if the AI gets stuck?

Synthflow agents are designed to manage uncertainty. They can ask clarifying questions, offer alternate responses, or escalate to a human. You can control handoff triggers based on failed attempts or sentiment.

How many calls can it handle?

Synthflow handles 1M+ calls a day; your agreement sets how many of your calls can run at the same time.

Is it secure?

Yes. Synthflow is ISO/IEC 27001 certified, SOC 2 Type II audited and PCI DSS v4.0.1 compliant. It signs the business associate agreement (BAA) that HIPAA requires for patient data. US and EU workspaces keep Synthflow workspace data and processing in the selected region; connected providers can process some requests elsewhere.

Watch Synthflow take your calls

Bring two or three of the calls your team takes every day, and we’ll walk one through end to end.