GRAVITY RAIL
SUB-PROCESSORS
Last Updated: April 7, 2026
Gravity Rail, Inc. ("Gravity Rail") uses the following sub-processors to provide the Services described in our Terms of Service and Privacy Policy.
Infrastructure & Hosting
| Sub-Processor | Purpose | Data Location |
|---|
| Amazon Web Services (AWS) | Cloud infrastructure, compute, storage, databases, email delivery (SES), frontend hosting (Lambda) | US (us-west-2) |
AI & Machine Learning
| Sub-Processor | Purpose | Data Location |
|---|
| Amazon Bedrock (AWS) | AI model inference (Claude, Nova) | US (us-west-2) |
| Google Cloud (Vertex AI) | AI model inference (Gemini) | US |
| OpenAI | AI model inference (GPT-4.1, Realtime Voice) | US |
Deepgram | Speech-to-text transcription | Self-hosted (migration in progress) |
| ElevenLabs | Text-to-speech synthesis | US |
| Langfuse | LLM observability and prompt management | EU (Frankfurt) |
Communications
| Sub-Processor | Purpose | Data Location |
|---|
| Twilio | Telephony, SMS, and voice calling | US |
Payments & Billing
| Sub-Processor | Purpose | Data Location |
|---|
| Stripe | Payment processing and subscription management | US |
Analytics & Monitoring
| Sub-Processor | Purpose | Data Location |
|---|
| PostHog | Product analytics and usage tracking | US (us.i.posthog.com) |
| Google Analytics | Product analytics | US |
| Sentry | Error monitoring and performance | US |
Mapping & Location
| Sub-Processor | Purpose | Data Location |
|---|
| Mapbox | Map rendering and geocoding | US |
Security & Compliance
| Sub-Processor | Purpose | Data Location |
|---|
| Google reCAPTCHA | Bot detection and abuse prevention | US |
| Wazuh | Security information and event management (SIEM) | US |
Notification of Changes
We will update this page when we add or replace a sub-processor. If you have subscribed to sub-processor change notifications, we will email you at least thirty (30) days before a new sub-processor begins processing personal data. If you object to a new sub-processor, you may terminate your account pursuant to the Terms of Service.
Questions
For questions about our sub-processors or data processing practices, contact privacy@gravityrail.com.