AI voice agents for business phone lines that answer, call back, and transfer to your team
Stage
Not given
Startup
Founded
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Based in
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Pricing model
Freemium
Paid
Pricing
Free plan: unlimited topics, generated segments each session, extend 1 extra segment per topic. Pro plan: $16.9/month (originally $29), includes unlimited segment extensions, unlimited deep-dive questions, and realtime AI voice playback. Month-to-month with no lock-in; cancel anytime.
Pay-as-you-go with no subscriptions or minimums. Starting credit of $5 USD. Calls billed per minute: $0.0673 per minute on the lowest-cost stack (all-in). Platform infrastructure fee is $0.0500 per minute. Speech-to-text from $0.0020 to $0.0100 per minute. Language models from $0.0008 to $0.0264 per
Key features
Generate infinite audio lessons on any topic
Structured audio course with overview and deep-dive segments
Real-time playback with segment generation during listening
Web and mobile access with no download required
Sentence-by-sentence highlighting for hands-free learning
Browse hundreds of curated topics or enter custom topics
Growing knowledge trail showing mastered topics and next steps
Unlimited deep-dive questions with Pro plan
Visual flow builder for designing call flows
Inbound and outbound calling
380ms median response time on production calls
Integration with Meta leads
Mid-call API integration and data lookup
Do-not-call list enforcement
Choice of language models, speech-to-text, and voice providers
Call recording with GDPR compliance and opt-out
Transparent per-minute cost breakdown
What makes it different
Never-ending: Segments keep generating as long as you listen, unlike fixed-episode podcasts
On-demand personalization: Generate content for any topic instantly, not what a host chose
Continuous learning: Knowledge trail builds across all listening sessions
Fits existing time: Learn during dead time—commutes, workouts and chores without needing dedicated study
Free to start with no payment barrier to try learning
Fastest response time: 380ms median to first word on production calls
Switchable AI models per flow for cost optimization
Transparent usage-based pricing with no subscriptions or minimums
Built-in intelligent call routing to the right team
Defaults that respect privacy with recording off by default
Lambda Infinity
Talkif