Synthflow

Synthflow is a full-stack Voice AI platform company that enables enterprises to design, deploy, and manage AI voice agents for automated phone calls at scale. The platform provides an end-to-end Voice AI Operating System with a multi-agent system for architecting modular voice flows, custom in-house telephony delivering sub-100ms latency and carrier-grade reliability, an AI sandbox for testing and version control, real-time monitoring of calls and API interactions, and data fine-tuning using past conversations to improve agent accuracy. Synthflow's BELL Framework (Build, Evaluate, Launch, Learn) connects every stage of the agent lifecycle into a repeatable process, with automated testing in the Test Center measuring accuracy, response quality, and compliance against KPIs before deployment. The platform supports omnichannel conversational AI across voice, chat, SMS, and more, with 200+ integrations including CRMs, CCaaS platforms, calendars, and tools like Salesforce, HubSpot, Zapier, Cisco, Avaya, and Genesys. Synthflow serves industries including BPO and call centers, healthcare, financial services, retail, real estate, technology, and telecom, with proven deployments including 65% routine call automation with Freshworks, 600K+ monthly calls handled for a BPO operator, and 500K monthly AI-powered calls for a CRM platform. The platform is SOC 2, HIPAA, PCI DSS, and GDPR certified with end-to-end encryption, audit logs, and region-based hosting. Founded in 2023 and headquartered in Berlin, Germany, Synthflow has raised $30.0M in Series A funding from investors including Atlantic Labs, Singular, and Accel.