Synthflow

AI Agents & Chatbots Contact Center & CCaaS Voice & Phone AI

Berlin-based enterprise voice AI platform with its own telephony network, a visual flow builder and built-in testing and auto-QA. Contracts from $30,000/yr.

Best for

Mid-size and enterprise contact centers and BPOs that want voice agents with telephony, pre-launch testing and auto-QA from one vendor, especially Freshworks or 8x8 shops.

Look elsewhere if

You want pay-as-you-go, self-serve voice agents; Synthflow now sells enterprise contracts starting at $30,000 a year.

Pricing
Paid from $30,000/yr
Founded
2023
Free trial
Free to build (Pay-As-You-Go after launch)
How you buy
Sales-led (demo first)
Minimum commitment
$30,000/yr minimum (Enterprise)
Company
Independent, venture-backed
Channels
Chat, Voice, SMS, WhatsApp
Languages
30+ languages
Integrations
Genesys Five9 8x8 RingCentral Cisco Avaya Dialpad Salesforce HubSpot Zoho Freshworks Zendesk Intercom Twilio Telnyx Vonage Google Calendar Cal.com Zapier Make n8n Shopify Stripe

Synthflow is a platform for building AI voice agents that answer and place phone calls, and since 2026 it also runs chat agents from the same workflows. Agents are built in a visual Flow Designer, where subflows act as specialised agents for separate tasks and steps call your APIs, and are deployed into customer service, receptionist, appointment booking, IVR, lead qualification and outbound campaigns. It connects to more than 200 tools, including contact center platforms (Genesys, Five9, 8x8, RingCentral, Cisco, Avaya), CRMs (Salesforce, HubSpot, Zoho, Freshworks), helpdesks (Zendesk, Intercom) and telephony carriers such as Twilio, Telnyx and Vonage. Synthflow claims more than 30 languages.

Two things distinguish it from Retell and Vapi, the developer-first voice platforms it is usually compared with. First, Synthflow runs its own telephony network, which it says keeps latency under 100 milliseconds and lets it place voice infrastructure in the regions a customer needs, while still accepting your own carrier or SIP trunk. Second, it has packaged the agent lifecycle into what it calls the BELL framework (Build, Evaluate, Launch, Learn): agents are tested in a Test Center with simulated calls before going live, and Auto-QA scores every live conversation afterwards so the results feed the next version. Forward-deployed engineers handle enterprise rollouts. The trust center lists SOC 2 Type 2, ISO 27001, ISO 42001, HIPAA, PCI DSS, GDPR and EU AI Act coverage, which is unusually broad for a company this young.

Synthflow was founded in Berlin in 2023 by Hakob Astabatsyan (CEO), Albert Astabatsyan and Sassun Mirzakhan-Saky. It raised a pre-seed led by Atlantic Labs, a seed led by Singular in 2024 and a $20 million Series A led by Accel in June 2025, for $30 million in total, and has about 70 employees. It says more than 130 enterprises use it. The most notable deployment is a partnership with Freshworks that puts Synthflow voice AI inside Freshcaller, Freshdesk and Freshservice, automating up to 65 percent of routine voice requests; 8x8 and AVANT signed channel partnerships in 2026. Customer stories include Thryv, Medbelle, Euro Paper and Niagara Region Transit.

Synthflow has moved upmarket: its pricing page now lists only enterprise contracts, starting at $30,000 a year and scoped around call volume, concurrency, telephony and integrations. Choose Synthflow if you want enterprise voice agents with telephony, testing and QA handled by one vendor, especially if you already run Freshworks or 8x8. Skip it if you are a small business or developer wanting to pay by the minute and build yourself; Retell or Vapi publish usage pricing and let you start without a contract.

Key features

What the AI can do

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Frequently asked questions

Who is Synthflow best for?
Mid-size and enterprise contact centers and BPOs that want voice agents with telephony, pre-launch testing and auto-QA from one vendor, especially Freshworks or 8x8 shops. Look elsewhere if you want pay-as-you-go, self-serve voice agents; Synthflow now sells enterprise contracts starting at $30,000 a year.
How much does Synthflow cost?
Synthflow is a paid product. The listed starting price is $30,000/yr. Compare pricing across all listed tools →
What does Synthflow integrate with?
Synthflow integrates with Genesys, Five9, 8x8, RingCentral, Cisco, Avaya, Dialpad, Salesforce, HubSpot, Zoho, Freshworks, Zendesk, Intercom, Twilio, Telnyx, Vonage, Google Calendar, Cal.com, Zapier, Make, n8n, Shopify, and Stripe.
What compliance standards does Synthflow meet?
Based on the vendor's own security and trust pages, Synthflow claims SOC 2, HIPAA, GDPR, ISO 27001, ISO 42001, PCI DSS, and EU AI Act compliance. See how that compares across vendors →
Is Synthflow HIPAA compliant?
Yes. The vendor advertises HIPAA compliance for Synthflow on its own site. Confirm the specifics, such as whether a business associate agreement (BAA) is offered, with the vendor before you buy.
Which support channels does Synthflow cover?
Synthflow handles customer conversations over chat, voice, SMS, and WhatsApp.
What languages does Synthflow support?
Synthflow supports 30+ languages.
Can Synthflow take actions, or does it only answer questions?
Synthflow can take actions in connected systems, not just answer questions, including account updates and bookings & scheduling.
Does Synthflow have a free trial?
Yes: Free to build (Pay-As-You-Go after launch).
Can I buy Synthflow without talking to sales?
No. Access starts with a demo or a conversation with sales. Minimum commitment: $30,000/yr minimum (Enterprise).
When was Synthflow founded?
Synthflow was founded in 2023.
What are the best Synthflow alternatives?
Popular alternatives include ASAPP, Bland AI, and boost.ai. See all Synthflow alternatives →
Sources for the facts on this page

Updated October 2026

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