AI phone agents with integrated audio understanding, model routing, and voice optimization
Enterprise AI agents that automate recurring business work
Stage
Not given
Established
Founded
Not given
2016
Based in
US
US
Pricing model
Paid
Freemium
Pricing
Cost-plus pricing: customers pay vendor list prices for models and voice plus hosting (15% of vendor costs, 0.5¢ to 2¢ per minute) plus company margin (17-25%). Lean calls cost from 2.0¢/min (1.18¢ vendors + 0.50¢ hosting + 0.35¢ margin). Receptionist calls cost 4.7¢/min (3.36¢ vendors + 0.50¢ hosti
Not given
Key features
Multi-model architecture running multiple transcription and language models per call
Zeus AI agent that builds, tests and tunes voice agents automatically
Simulated call testing before live deployment
Live call monitoring and observability
A/B testing and automated fix suggestions
Integration wizard for CRM, VoIP and business software
Client portals for managing multiple agents
Knowledge base integration for agent grounding
Outbound campaigns with CSV upload and scheduling
AI agents that automate complex recurring business workflows
Conversational AI for natural language queries across enterprise data
Number verification and lineage tracing
AI-powered data preparation and semantic layer
Automated machine learning modeling
No-code workflow configuration
What makes it different
Cost-plus pricing with no margin markup pass-through when vendor prices drop
Fully agentic Zeus AI that handles entire lifecycle from creation to optimization
Multi-model architecture for superior audio understanding vs 3-step pipelines
Starts at 2¢/min, cheaper than competitors and call center labor
Every number checked before delivery
Understands your team's specific business context and methods
Data remains secure in your environment
Owns complete workflows end-to-end without handoffs
ThunderPhone
Tellius