Tone

7.6easy start · #3 of 32
in AI Voice Agents

Free to practise onyes
Free trialyes
Well documentedyes
Runs where you worknot on record

Runs on api, self-hosted, Web. Paid plans from $0.09/mo.

Tone is ranked #3 of 32 in AI voice agents on The Geeks Club. It runs on API, Self-hosted, Web. There is a free plan. A free trial is offered. Paid plans start at $0.09/mo.

Tone plans and pricing

All plans

Self-host Free $0 Unlimited agents, calls, workflows · Bring your own LLM, voice, telephony · Docker Compose & Helm chart · Community Discord support · All integrations included trytone.ai · 30 Sept 2026

Cloud $0.09/mo $0.09 per minute $10 free credit, no card required · Auto-scaling worker fleet · 99.99% uptime SLA · SOC 2 Type II · HIPAA-ready · Email & chat support · Pay-as-you-go, cancel anytime trytone.ai · 30 Sept 2026

Enterprise Not published Custom Single-tenant or on-prem · BAA, DPA, custom contracts · Dedicated support and Slack channel · Custom integrations and roadmap · Audit logs, SSO/SAML, RBAC trytone.ai · 30 Sept 2026

Compared on AI voice agents

Free plan: Yes
Inbound calls: Yes
Outbound calls: Yes
Human handoff: Yes
Supported languages: 29 languages
Custom phone numbers: Yes

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The record

What it does: Tone is an open-source voice AI platform for building, deploying, and self-hosting voice agents.
Agent channels: Agents can run inbound, outbound, web-widget, or chat experiences.
Agent composition: Agents combine prompts, tools, workflows, configurable models, voices, and speech-to-text providers.
Knowledge base: Tone ingests PDFs, scraped documents, Notion, and Confluence content and provides chunking, embeddings, retrieval, re-ranking, citations, and custom vocabulary.
Workflow builder: The visual workflow builder supports branching, loops, human handoff, TypeScript hooks, and triggers from Zapier, REST API, or HighLevel.
Testing: The test center runs simulated calls with personas, accents, and edge cases, supports parallel regression runs, and replays production calls.
Observability: Observability includes interruption rate, latency, sentiment, gibberish detection, stereo recordings, waveform inspection, custom dashboards, and real-time alerts.
Self-hosting: Tone can be started with Docker Compose and includes a Kubernetes Helm chart, with Postgres, Redis, and ClickHouse in the example stack.
Open-source license: Tone is MIT licensed and its agent runtime, call routing, and evaluation harness are published on GitHub.
Security posture: The site states SOC 2 Type II, HIPAA-ready, and GDPR compliance, and the changelog says edge PII redaction and HMAC-SHA256 webhook signing were added.
Support: Self-host customers receive community Discord support, Cloud customers receive email and chat support, and Enterprise customers receive dedicated support with a Slack channel.
Performance: The product page states a 218 ms voice-loop p50, 120 ms time-to-first-byte, 10k+ concurrent calls per region, 29 supported languages, and a 99.99% Cloud uptime SLA.
Developer access: Tone provides a TypeScript-first SDK, CLI, local Docker development loop, composable runtime, and hosted API access.
Headquarters: Bengaluru and San Francisco
Price from: $0.09/mo

Where it ranks on The Geeks Club

Best AI Voice Agents in 2026#3 of 32

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Sources

trytone.ai· checked 30 Sept 2026
trytone.ai/docs/self-hosting/docker· checked 30 Sept 2026
trytone.ai/changelog· checked 30 Sept 2026
trytone.ai/product· checked 30 Sept 2026