AgentStack REI

Synthflow

Enterprise conversational AI platform for voice agents, sold as an annual contract rather than self-serve per-minute billing.

Price

custom/contact

Vendor states it has no free plan or trial and no rate by the minute. Pricing is an annual enterprise agreement scoped to call volume, telephony, integrations, security, and launch support.

Free trial: Official pricing page says there is no free plan or trial.

Price checked Nov 13, 2026 · source

Visit synthflow.ai →

What it can do

  • Deploy enterprise AI voice agents with telephony (native, SIP, or approved enterprise telephony)
  • CRM, calendar, contact-center, webhook, API, and knowledge-source integrations
  • Forward-deployed engineers for launch support where the agreement includes it
  • White-label workspaces for BPOs and software platforms under the annual agreement

What it can't do / limits

  • No self-serve or per-minute public pricing
  • Every new deployment starts on an Enterprise contract
  • Time-to-live is described as weeks, depending on integrations, telephony, and security review

Who it fits

Larger investor shops or agencies that want a contracted enterprise voice platform and can go through a sales-led rollout.

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