Last updated: December 2025
Tone uses certain third-party sub-processors to help provide our services. These sub-processors process Customer Data on our behalf to enable core functionality of the Tone app.
Important: We do NOT store your actual message content. Messages are analyzed in real-time and only aggregated statistics are stored.
The following is a list of sub-processors that Tone uses to provide its services:
| Sub-Processor | Purpose | Data Location | Privacy Policy |
|---|---|---|---|
| Slack Technologies, Inc. | App functionality, user authentication, and message delivery. Required for core app operation. | United States (with EU data residency options) | View Policy |
| Google (Gemini AI) | Tone analysis of messages. Messages are sent for real-time analysis but NOT stored by Google or us. | United States / Global | View Policy |
| Anthropic (Claude AI) | Alternative tone analysis provider. Messages are sent for real-time analysis but NOT stored by Anthropic or us. | United States | View Policy |
| Google (Calendar API) | Optional calendar integration for context-aware tone analysis. Read-only access to calendar events (if user connects). | United States / Global | View Policy |
| Stripe, Inc. | Payment processing for one-time purchases. Only processes payment data when you pay. We do NOT store card details. | United States / EU (based on account region) | View Policy |
| Supabase (PostgreSQL Database) | Database hosting for aggregated statistics, user preferences, and billing data. We do NOT store message content. | EU (Ireland) - AWS infrastructure | View Policy |
| Railway | Application hosting and infrastructure. Hosts the Tone application server. | EU (Netherlands) | View Policy |
We have Data Processing Agreements (DPAs) in place with our sub-processors where required by law (e.g., GDPR). These agreements ensure that sub-processors:
We may add or remove sub-processors from time to time. When we add a new sub-processor, we will update this page and notify customers via email if the change significantly impacts data processing.
To be notified of sub-processor changes, please contact us at privacy@checktone.app.
If you have questions about our sub-processors or data processing practices, please contact us at privacy@checktone.app.
