| Amazon Web Services, Inc. (AWS) | Cloud infrastructure hosting, storage, and database management. | United States | Core infrastructure provider; hosts the primary application and all encrypted customer data. |
| Stripe, Inc. | Subscription billing and payment processing. | United States | Secure processing of billing information and subscription payments. |
| OpenAI, L.L.C. | AI-powered message generation and LLM processing. | United States | Used for applicable generative outreach features. |
| Anthropic PBC | AI-powered message generation and LLM processing. | United States | Used for applicable generative research features. |
| Google LLC (Gemini) | AI-powered message generation and LLM processing. | United States | Used for applicable research-analysis features. |
| Perplexity AI, Inc. | AI-driven web research and deep prospect analysis. | United States | Used for applicable web-research features. |
| PostHog, Inc. | Product analytics and feature usage monitoring. | United States | Privacy-focused analytics used to improve platform performance and user experience. |
| Functional Software, Inc. (Sentry) | Application error monitoring, performance monitoring, diagnostics, and sampled session replay. | United States | Required for production diagnostics; collection is limited by sampling and configured data-scrubbing controls. |
| Google LLC (Workspace) | Email sending, authentication, and integrated calendar services. | United States / Global | Used for outbound Gmail integration and secure user login. |
| Microsoft Corporation | Email sending and communications (Outlook/365). | United States | Used for outbound Outlook integration and recipient communication. |