Last updated 08-09-2026
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Synthflow (formerly Fine-Tuner.ai)
Synthflow builds voice AI agents that answer, route, and complete phone calls for support, scheduling, and lead qualification teams. You design agent workflows, connect telephony or SIP trunks, and launch branded callers that handle thousands of concurrent conversations without adding headcount.
The product evolved from the no-code Fine-Tuner.ai agent builder into an enterprise voice platform with native telephony, CRM integrations, and a BELL framework that tunes agents after launch. That pivot targets contact centers and SaaS vendors who need white-labeled voice automation rather than hobbyist chatbots in a browser widget.
BPO operators, healthcare schedulers, and CRM platforms are the documented buyers. Synthflow reports 65M+ monthly calls across 30+ countries, enterprise contracts starting at $30,000 per year, and case studies citing 600K monthly automated calls for a multinational BPO.
Voice AI Operating System manages design, launch, and analytics for phone agents
Native telephony plus SIP trunking instead of third-party voice middleware
Enterprise contracts start at $30,000 per year with scoped call volume and concurrency
BELL framework continuously improves agent performance after deployment
CRM, calendar, webhook, and knowledge-base integrations for handoffs
White-label deployments for BPO and SaaS vendors embedding voice AI
Native telephony stack avoids third-party voice middleware lock-in
No-code workflow builder inherited from Fine-Tuner.ai roots
Enterprise onboarding includes forward-deployed engineers
White-label voice agents for BPO and CRM embeds
Handles 65M+ monthly calls across 30+ countries per marketing site
Public pricing starts at $30,000 per year with no self-serve tier
Requires sales scoping for concurrency, telephony, and integrations
Legacy fine-tuner.ai branding may confuse existing API users
What happened to Fine-Tuner.ai?
Fine-Tuner.ai rebranded to Synthflow and now focuses on enterprise voice AI agents. The fine-tuner.ai domain redirects to synthflow.ai, and the legacy docs subdomain still hosts API references for existing integrations.
How much does Synthflow cost?
Synthflow enterprise contracts start at $30,000 per year according to the public pricing page. Final pricing depends on call volume, concurrency, telephony setup, integrations, and security requirements.
Does Synthflow require coding?
Synthflow advertises no-code agent design for voice workflows. Enterprise rollouts include forward-deployed engineers, onboarding, testing, and launch support scoped in the contract.
Which telephony options does Synthflow support?
Synthflow offers Synthflow Native Telephony, SIP trunking, or approved enterprise telephony integrations. The platform routes calls with configurable escalation paths and fallback logic.
What industries use Synthflow?
Synthflow publishes solutions for BPO contact centers, healthcare, financial services, retail, and technology companies. Customer stories highlight CRM platforms and multilingual BPO operators.
Can Synthflow agents hand off to humans?
Synthflow workflows support routing, escalation paths, and handoffs to live agents or CRM records. Implementation teams configure fallback logic during enterprise onboarding.