Berlin-based Synthflow AI, a no-code voice AI platform for automated phone calls, announced a $20M Series A funding round on June 25, 2025, led by Accel with participation from Atlantic Labs and Singular, bringing total funding to $30M. The investment will drive global expansion, including a new U.S. office, and enhance its AI Voice Operating System for enterprise adoption in contact centers and business process outsourcing (BPO).
Funding: $20M Series A led by Accel, total raised $30M.
Purpose: Expand globally, open U.S. office, enhance R&D.
Platform: No-code, white-label voice AI for enterprises.
Impact: 45M calls handled, 5M hours saved, 99.9% uptime.
Integrations: Over 200 with CRMs, telephony, and calendars.
Target: BPO, contact centers, healthcare, finance, education.
Founded in 2023 by Albert Astabatsyan, Hakob Astabatsyan, and Sassun Mirzakhan-Saky, Synthflow AI offers a no-code platform that enables non-technical users to deploy customizable, human-like voice agents. “Businesses and their customers are becoming increasingly comfortable communicating with AI agents,” said CEO Hakob Astabatsyan. “Our mission is to make high-quality, low-cost AI voice agents more accessible.” The platform supports complex workflows like customer support, appointment scheduling, and lead qualification, with rapid deployment compared to legacy vendors’ six-month onboarding.
Synthflow’s AI Voice Operating System delivers natural-sounding interactions with low latency and 99.9% uptime, handling 45 million calls and saving over 5 million hours of contact center operations. It answers 35% more calls than non-AI operators, serving over 1,000 customers, including BPO providers, with 90% enterprise retention. The platform’s 200+ integrations with tools like Salesforce, HubSpot, and Twilio, plus HIPAA and GDPR compliance, make it ideal for regulated industries like healthcare and finance.
The $168B global conversational AI market is at an inflection point, with voice agents becoming cost-effective for enterprises. “The market opportunity for deploying voice agents in traditional customer support use cases is vast,” said Accel’s Luca Bocchio, noting Synthflow’s edge over legacy players through accessibility and compliance. The funding will fuel R&D for advanced use cases and expansion into non-English markets like Germany and France, building on a 15x growth rate in 2024.
Synthflow AI’s Series A positions it to lead the voice AI revolution, offering enterprises a scalable, compliant, and user-friendly solution to transform customer interactions and operational efficiency in a competitive landscape.
Synthflow AI is a no-code platform for deploying voice AI agents that automate phone calls across contact center operations and business process outsourcing (BPO) at scale. A G2 Grid Leader for AI Agents, Synthflow helps mid-market and enterprise companies manage routine calls to save teams time and resources without increasing headcount. Backed by Accel and trusted by over 1,000 customers, its growth reflects a broader industry shift toward sophisticated and accessible conversational AI in a global market projected to reach $168.2 billion.
Accel is a global venture capital firm that is the first partner to exceptional teams everywhere, from inception through all phases of private company growth. Atlassian, Bumble, Celonis, CrowdStrike, Deliveroo, Fiverr, Freshworks, Miro, Qualtrics, Scale, Segment, Slack, Spotify, Supercell, and UiPath are among the companies Accel has backed over the past 40+ years. We help ambitious entrepreneurs build iconic global businesses.
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