Synthflow AI is bringing ‘conversational’ voice agents to call centers. Read the pitch deck that it used to raise $20 million.

Synthflow, a startup that has built AI voice agents that can hold “natural-sounding” phone conversations with customers, has raised $20 million in funding.

The Berlin-based startup’s platform lets enterprise customers create and deploy AI voice agents without coding expertise. Companies can customize those agents to handle simple inquiries, customer support, and follow-up with actions like appointment scheduling.

“You can think of Synthflow as a voice AI platform on a no-code basis that allows businesses to very easily and quickly build and deploy voice AI agents,” Hakob Astabatsyan, cofounder of Synthflow, told Business Insider.

Astabatsyan said his startup’s tech can replace traditional automated call menus, in which users press buttons to select options. Instead, Synthflow’s technology is built on large language models that can have “real-time contextual conversations,” Astabatsyan said.

In a demo video seen by BI, an AI agent answers a call from a customer seeking a car insurance quote. The AI agent asks for the customer’s details in a relaxed, conversational tone before transferring to a human operator. Astabatsyan said the AI agent’s responses come in under 400 milliseconds, which matches the human brain’s processing speed for conversations.

Astabatsyan founded Synthflow in 2023 with Albert Astabatsyan and Sassun Mirzakhan-Saky. The startup says it now has over 1,000 enterprise clients, often in call centers, in areas such as finance, healthcare, and education. It also offers its tech on a white-label basis and can integrate into a company’s existing telephony system.

Voice has become a key battleground among AI startups, with companies like ElevenLabs and PolyAI also raising millions in capital to develop AI for call centers.

Astabatsyan said that fundraising for AI startups is “definitely not easy” because the expectations are “very, very high.”

He added that investors expect AI startups to grow “two times faster” than benchmarks from a few years ago.

Synthflow’s Series A round, which was led by Accel with participation from Atlantic Labs and Singular, brings the startup’s total funding to $30 million. Synthflow plans to use the fresh funding to open a new US office and invest in developing its agent platform.

BI got a look at the 10-slide pitch deck it used to secure the fresh funding.

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