Threetone Subprocessors

Updated 16 October 2026

Threetone Labs Private Limited (“Threetone”) engages the following third parties to process customer personal data on our behalf to provide the Threetone platform.

We update this page when our subprocessors change. To be notified of updates, email legal@threetone.in.

Infrastructure

SubprocessorPurposeLocation
Vercel Inc.Website and app hostingUnited States
PlanetScale, Inc.Database hostingUnited States
Railway CorporationAPI hostingUnited States
WorkOS, Inc.Authentication and credential storageUnited States
Upstash, Inc.Caching and rate limitingUnited States
Inngest Inc.Background workflowsUnited States
Tinybird, Inc.Conversation analyticsGermany
Cloudflare, Inc.File storage and analytics proxyUnited States

Voice, telephony and messaging

SubprocessorPurposeLocation
LiveKit, Inc.Real-time voice and agent hostingUnited States
Twilio Inc.Phone numbers, calls and SMSUnited States
Plivo (Plivo Services India Private Limited)Phone numbers and callsIndia
Meta Platforms, Inc.WhatsApp messagingUnited States

Voice AI models (used when selected for an agent)

SubprocessorPurposeLocation
LiveKit, Inc. (LiveKit Inference)Model inferenceUnited States
OpenRouter, Inc.Language model routingUnited States
OpenAILanguage modelsUnited States
Anthropic, PBCLanguage modelsUnited States
Google LLCLanguage modelsUnited States
Eleven Labs Inc.Speech recognition and voicesUnited States
Cartesia AI, Inc.Speech recognition and voicesUnited States
Sarvam AI (Axonwise Private Limited)Speech recognition and voicesIndia

Product and business tools

SubprocessorPurposeLocation
PostHog, Inc.Product analytics and error trackingUnited States
Dodo PaymentsPayments and billing—
Resend (Plus Five Five, Inc.)Transactional emailUnited States