Tone
6.6#11 in ai voice agents$0.09 usage-basedFree planWebAPISelf-hosted
VisitTone vs Voiceflow
What both publish
| Fact | Tone | Voiceflow |
|---|---|---|
| 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. | Native connectors include Zendesk, Salesforce, HubSpot, Shopify, Airtable, Google Sheets, Gmail and Twilio. |
| Knowledge base | Tone ingests PDFs, scraped documents, Notion, and Confluence content and provides chunking, embeddings, retrieval, re-ranking, citations, and custom vocabulary. | Knowledge bases can connect agent answers to imported information and services such as Zendesk and Shopify. |
| Observability | Observability includes interruption rate, latency, sentiment, gibberish detection, stereo recordings, waveform inspection, custom dashboards, and real-time alerts. | The platform records transcripts and call recordings and provides evaluations, tests and runtime analytics. |
Tone plans
- Self-hostFree
- Cloud$0.09 a month
- EnterprisePriced on request
Voiceflow plans
- StarterFree
- Agencies & PartnersFree
- Pro$120 a month
- Business$500 a month
- Pro$972 a year
- EnterprisePriced on request
Pick Tone if…
Tone suits developers and teams building voice agents across phone, web-widget, or chat channels. Its self-hosting and workflow tools may also suit organizations that want control over deployment and agent logic.
Pick Voiceflow if…
Voiceflow is presented for CX and support leaders, engineers, enterprise teams, and agencies or partners building agents for clients. It may suit teams that need agents across voice and chat channels, integrations, and evaluation tools.