Skip to content
SPECIFICTION
Get listed

Tone

trytone.ai

From $0.09/mo Free plan WebAPISelf-hosted
Visit trytone.ai
Spec score 7.9 #16 of 32 in AI Voice Agents

What it is

Tone is an open-source voice AI platform for building, deploying, and self-hosting voice agents. Agents can handle inbound or outbound calls, web widgets, or chat, combining prompts, tools, workflows, configurable models, voices, and speech-to-text providers. Its knowledge base accepts PDFs, scraped documents, Notion, and Confluence content, with chunking, embeddings, retrieval, re-ranking, citations, and custom vocabulary. A visual workflow builder supports branching, loops, human handoff, TypeScript hooks, and triggers from Zapier, REST API, or HighLevel. The test center runs simulated calls with personas, accents, and edge cases, supports parallel regression runs, and replays production calls. Observability includes interruption rate, latency, sentiment, gibberish detection, recordings, dashboards, and real-time alerts. Tone offers a TypeScript-first SDK, CLI, hosted API, and self-hosting through Docker Compose or a Kubernetes Helm chart. The Self-host plan is free. Cloud costs $0.09 per minute and includes $10 free credit with no card required; Enterprise pricing is custom.

Spec sheet

What it does
Tone is an open-source voice AI platform for building, deploying, and self-hosting voice agents.Read 30 Sep 2026 · trytone.ai
Integrations
Listed integrations include OpenAI, Anthropic, Google Gemini, Mistral, Llama, ElevenLabs, Cartesia, PlayHT, Deepgram, Whisper, AssemblyAI, Twilio, Telnyx, Plivo, LiveKit, HubSpot, Salesforce, Zapier, n8n, Slack, Notion, Confluence, and GoHighLevel.Read 30 Sep 2026 · trytone.ai
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.Read 30 Sep 2026 · trytone.ai
Headquarters
Bengaluru and San FranciscoRead 23 Sep 2026 · trytone.ai
Agent channels
Agents can run inbound, outbound, web-widget, or chat experiences.Read 30 Sep 2026 · trytone.ai
Agent composition
Agents combine prompts, tools, workflows, configurable models, voices, and speech-to-text providers.Read 30 Sep 2026 · trytone.ai
Developer access
Tone provides a TypeScript-first SDK, CLI, local Docker development loop, composable runtime, and hosted API access.Read 30 Sep 2026 · trytone.ai
Knowledge base
Tone ingests PDFs, scraped documents, Notion, and Confluence content and provides chunking, embeddings, retrieval, re-ranking, citations, and custom vocabulary.Read 30 Sep 2026 · trytone.ai
Observability
Observability includes interruption rate, latency, sentiment, gibberish detection, stereo recordings, waveform inspection, custom dashboards, and real-time alerts.Read 30 Sep 2026 · trytone.ai
Open-source license
Tone is MIT licensed and its agent runtime, call routing, and evaluation harness are published on GitHub.Read 30 Sep 2026 · trytone.ai
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.Read 30 Sep 2026 · trytone.ai
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.Read 30 Sep 2026 · trytone.ai
Self-hosting
Tone can be started with Docker Compose and includes a Kubernetes Helm chart, with Postgres, Redis, and ClickHouse in the example stack.Read 30 Sep 2026 · trytone.ai
Testing
The test center runs simulated calls with personas, accents, and edge cases, supports parallel regression runs, and replays production calls.Read 30 Sep 2026 · trytone.ai
Workflow builder
The visual workflow builder supports branching, loops, human handoff, TypeScript hooks, and triggers from Zapier, REST API, or HighLevel.Read 30 Sep 2026 · trytone.ai

Plans and prices

Self-host Free $0 Unlimited agents, calls, workflows · Bring your own LLM, voice, telephony · Docker Compose & Helm chart · Community Discord support · All integrations included Read 30 Sep 2026 · trytone.ai
Cloud $0.09 a month $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 Read 30 Sep 2026 · trytone.ai
Enterprise Priced on request Custom Single-tenant or on-prem · BAA, DPA, custom contracts · Dedicated support and Slack channel · Custom integrations and roadmap · Audit logs, SSO/SAML, RBAC Read 30 Sep 2026 · trytone.ai

Every Tone plan and price →

Strong points and limits

Strong points

  • Supports inbound and outbound calls.
  • Workflows include branching, loops, and human handoff.
  • Self-host deployment offers Docker Compose and a Kubernetes Helm chart.
  • The free Self-host plan includes all integrations.
  • Cloud includes $10 free credit with no card required.

Limits

  • Cloud is billed at $0.09 per minute.
  • Enterprise pricing is custom.
  • Self-host customers receive community Discord support.

Who it suits

Tone may suit developers building voice agents for phone, web-widget, or chat experiences. Its self-hosted option may also fit teams that want to deploy with Docker Compose or Kubernetes.

Verdict

Tone brings agent building, workflow orchestration, testing, and observability into one voice AI platform. The free self-host plan and per-minute Cloud billing offer different deployment and cost models; Enterprise pricing requires a custom quote.

Where Specifiction places it

Alternatives to ToneAll alternatives →