AI phone agents with integrated audio understanding, model routing, and voice optimization
Stage
Not given
Not given
Founded
Not given
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Based in
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US
Pricing model
Freemium
Paid
Pricing
Cloud compute: $0.461/hour while awake, $0 when idle or parked. Models priced at or below maker's rate. Example: Claude Opus 5.5 with $0.461/hour compute, or $0 model usage if using Claude Pro/Max subscription. Prepaid credits start at $10. Card top-ups include Stripe fee (2.9% + $0.30).
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
Key features
Browser-based agent access
Agent API for integration
Multi-channel deployment via Slack and other apps
Native Mac app
Cloud-based agent execution
Bring your own Claude or ChatGPT subscription
Usage-based pricing with per-second compute metering
Agent skills for reusable instructions
Agent marketplace with 64+ agents
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
What makes it different
Access any agent in one place without per-agent switching
$0 model costs when using your Claude Pro/Max or ChatGPT Plus/Pro subscription
Cloud agents that cost $0 while parked or idle
Reusable agent skills that inject domain expertise automatically at runtime
Multi-channel deployment from browser to Slack to Mac without code
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
AgentSky
ThunderPhone