Subprocessors
Last updated: 25 April 2026
Smoothly uses the third-party companies listed below (“Subprocessors”) to help deliver our service. Each Subprocessor is contractually bound to data protection obligations consistent with our Data Processing Agreement.
For details about how we secure customer data, see our Security page.
| Subprocessor | Purpose | Region | Privacy Policy |
|---|---|---|---|
| Vercel | Application hosting and edge network | EU / Global | View |
| Supabase | Authentication and PostgreSQL database | EU | View |
| Cloudflare | CDN, DNS, and R2 object storage | Global (R2: Western Europe) | View |
| Anthropic | AI code generation (Claude API) | United States | View |
| Google (Gemini) | AI image generation (Gemini Flash Image) | United States | View |
| OpenAI | Optional AI capabilities (text embeddings) | United States | View |
| Stripe | Payment processing and subscription billing | EU / Global | View |
| Sentry | Error monitoring and crash reporting | EU | View |
| PostHog | Product analytics and session replay | EU | View |
| Modal | Sandboxed code execution containers | United States | View |
| Customer.io | Lifecycle and transactional email | United States | View |
| Upstash | Redis cache and rate limiting | EU | View |
| Axiom | Application logging and observability | EU | View |
| Temporal Cloud | Workflow orchestration | EU (eu-central-1) | View |
International Transfers
Where a Subprocessor is located outside the European Economic Area, transfers are protected by the European Commission's Standard Contractual Clauses and supplementary measures where applicable. Personal data sent to AI providers (Anthropic, Google, OpenAI) is transmitted via API integrations under agreements that prohibit training on customer data.
Updates
We update this list whenever we add or remove a Subprocessor. Customers with an active Data Processing Agreement receive at least 30 days' advance notice of new Subprocessors via email to the technical contact on file. To subscribe to changes, email legal@smoothly.dev.
Questions
For questions about our Subprocessors or data processing arrangements, contact legal@smoothly.dev.