Stellar

Autonomous AI voice agents for natural, human-like phone conversations.

What is Stellar?

Stellar deploys no-code AI voice agents that hold natural phone conversations to qualify leads, book appointments, and confirm events. Built on voice-to-voice models, the agents respond in under 500 milliseconds, handle interruptions in real time, detect sentiment and emotion, and work across 50+ languages. Agents self-learn from every call and can be chained into multi-agent pipelines, with integrations to Google Calendar, HubSpot, Salesforce, and Zapier. Enterprise-grade encryption and TCPA/GDPR/SOC 2-ready compliance controls come standard.

Key features

  • Natural voice-to-voice phone agents
  • Under 500ms median response latency
  • Interruption handling and sentiment detection
  • 50+ languages out of the box
  • Self-learning from every call
  • Multi-agent pipeline chaining
  • Integrations: Google Calendar, HubSpot, Salesforce, Zapier
  • Guardrails with isolated secondary AI judge
  • TCPA/GDPR compliance, SOC 2 readiness

Pros

  • Human-fast response times without STT-LLM-TTS lag
  • No-code agent deployment
  • Strong compliance and guardrail controls

Cons

  • Built for businesses; pricing geared to commercial use
  • Voice AI quality varies by language and use case

Stellar at a glance

PricingPaid
CategoryVideo & Audio
Platformsweb
Official websitestellarcs.ai
voice agentsphone callslead qualificationappointment bookingconversational ai

How to choose the right Video & Audio tool

Video and audio tools split into generators (which create footage, voices or music from prompts) and editors (which speed up cutting, captions and cleanup). Start from your end product: short social clips, long videos, podcasts or voiceovers each reward different strengths. For generation, check output resolution, clip length, and how much control you get over style and consistency. For voices and music, listen for natural pacing and check the languages you need. Licensing is critical — confirm you can use the output commercially, especially for client work and monetised channels. Finally, weigh render times and credit costs: a tool that takes an hour per clip changes your whole workflow.

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Stellar FAQs

What is Stellar?

Stellar deploys no-code AI voice agents that hold natural phone conversations to qualify leads, book appointments, and confirm events. Built on voice-to-voice models, the agents respond in under 500 milliseconds, handle interruptions in real time, detect sentiment and emotion, and work across 50+ languages. Agents self-learn from every call and can be chained into multi-agent pipelines, with integrations to Google Calendar, HubSpot, Salesforce, and Zapier. Enterprise-grade encryption and TCPA/GDPR/SOC 2-ready compliance controls come standard.

What are the main features of Stellar?

Stellar offers Natural voice-to-voice phone agents, Under 500ms median response latency, Interruption handling and sentiment detection, 50+ languages out of the box, Self-learning from every call, Multi-agent pipeline chaining, Integrations: Google Calendar, HubSpot, Salesforce, Zapier, Guardrails with isolated secondary AI judge and TCPA/GDPR compliance, SOC 2 readiness.

How much does Stellar cost?

Stellar is a paid product. Prices and plans change over time, so check its official website for the current pricing before you buy.

What are the pros and cons of Stellar?

Strengths of Stellar include Human-fast response times without STT-LLM-TTS lag; No-code agent deployment; Strong compliance and guardrail controls. On the downside, Built for businesses; pricing geared to commercial use; Voice AI quality varies by language and use case.