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Synthflow AI Voice Agent Builder

Synthflow builds AI voice agents for inbound and outbound calls, with visual workflows, telephony, integrations, testing, and monitoring.

Synthflow AI Voice Agent Builder

Synthflow is a web platform for designing, testing, launching, and monitoring AI voice agents. Teams can create inbound and outbound call flows, connect APIs and business systems, route calls, book appointments, answer questions, and transfer callers to people.

It is used by customer service, sales, operations, healthcare, financial services, and contact-center teams. Agents can also work through chat, SMS, WhatsApp, and website or app widgets. Building is available for free, while live usage and enterprise deployments are billed according to account terms or contract scope.

Features

  • Visual Flow Designer for structured, multi-step call logic
  • Inbound, outbound, and embeddable Voice Widget agents
  • API, webhook, CRM, calendar, and knowledge-base integrations
  • Test Center simulations and custom evaluation workflows
  • Call recordings, transcripts, logs, analytics, and monitoring
  • Human handoffs, SIP transfers, routing, and escalation rules
  • Chat, SMS, WhatsApp, and website or app deployment options
  • Public API for creating and managing agents

Use cases

  • Answer customer-support questions and route complex calls
  • Book appointments and send reminders
  • Qualify leads and launch outbound campaigns
  • Collect information and update CRM records
  • Handle after-hours calls and overflow traffic
  • Transfer urgent or specialized requests to human teams

Pros

    Cons

      Latest updates

      Capabilities

      • Automations — “They don’t just handle conversations; they complete actions, update records, route calls, and trigger downstream processes in real time.” source
      • AI agents — “Synthflow is an AI voice agent platform that helps businesses automate phone calls across customer service, sales, appointment booking and call routing.” source
      • Connects your apps — “Synthflow connects to the systems your teams already use—CRMs, CCaaS platforms, calendars, and data tools—so voice agents can operate inside your existing workflows .” source
      • API — “API Docs” source
      • Admin controls — “Synthflow’s infrastructure is certified across SOC 2, HIPAA, PCI DSS, and GDPR — with full encryption, audit logs, and region-based hosting built into every release.” source

      Get it

      Security

      • SOC 2 Type II — “COMPLIANCE SOC 2 Type 2” source
      • SOC 2 — “COMPLIANCE SOC 2 Type 2” source
      • ISO 27001 — “Our answers are maintained against an ISO/IEC 27001-certified and SOC 2 Type II-audited control set.” source
      • GDPR — “Compliance DORA EU AI Act GDPR” source

      Pricing

      Prices checked
      2026-11-06

      Enterprise

      Price on request

      • Enterprise SLA and support terms scoped in contract
      • Synthflow Native Telephony, SIP trunking, or approved enterprise telephony
      • Custom concurrency planning, routing, escalation paths, handoffs, and fallback logic
      • CRM, calendar, contact-center stack, webhook, API, and knowledge-source integrations
      • MSA/DPA support, data handling review, workspace controls, and enterprise security review
      • Implementation, onboarding, testing, training, launch support, and ongoing optimization
      Official website