At SendZen, we take security and compliance seriously. As part of being transparent with our customers, we maintain a list of the third-party providers ("sub-processors") that help us deliver, store, and monitor our services.

Each provider is carefully vetted for security, compliance, and reliability. We use only what is necessary — nothing more.

Infrastructure and Hosting

Amazon Web Services (AWS)

Role: Primary cloud provider.
Services: Lambda, API Gateway, App Runner, RDS, DynamoDB, S3, CloudWatch, Route 53, SQS, Secrets Manager, KMS.
Region: EU-West (Ireland) by default, with region-specific deployments as needed.

Vercel

Role: Frontend hosting and deployment platform.
Services: Marketing site (sendzen.io) and dashboard (app.sendzen.io).

Messaging and Communication

WhatsApp Cloud API (Meta Platforms Inc.)

Role: WhatsApp messaging delivery.
Services: Sending and receiving WhatsApp messages, delivery and read receipts.

Amazon Simple Email Service (SES)

Role: Transactional email delivery.
Services: Email for sign-up verification, alerts, and system notifications.

Google Workspace

Role: Internal and external communication.
Services: Email communication (hi@sendzen.io), document sharing, and collaboration.

Monitoring and Analytics

AWS CloudWatch

Role: System monitoring and alerting.
Services: Infrastructure metrics, error tracking, and alarms.

Metabase

Role: Product analytics.
Services: Internal dashboards for product usage metrics.

Google Analytics

Role: Website analytics (cookie-consent based).
Services: Tracking site traffic and engagement patterns.

PostHog

Role: Web and product analytics.
Services: Event tracking, funnels, and usage analytics across our marketing site and product (cookie-consent based).

Google Search Console

Role: Website performance analytics (cookie-consent based).
Services: Monitoring search visibility and indexing.

Customer Support

Tawk.to

Role: Live chat support (cookie-consent based).
Services: Real-time customer support and query handling.

Developer Experience

Linear

Role: Internal workflow and issue tracking.
Services: Project management and incident response coordination.

Apidog

Role: Documentation platform.
Services: Hosting and managing our API documentation.

Google Gemini 2.5 Pro

Role: AI-powered assistance.
Services: Documentation generation, developer support features, and internal automation.

Authentication and Identity

Google Single Sign-On (SSO)

Role: Authentication and single sign-on provider.
Services: OAuth 2.0 / OpenID Connect used for secure sign-up and login with Google under a Data Processing Addendum (DPA).

Payments

Stripe

Role: Payment gateway.
Services: Processing subscription payments globally.

Razorpay

Role: Payment gateway.
Services: Processing payments in India.

Updates to This List

We update this page whenever we add or replace a sub-processor. Customers who require notifications of such changes can subscribe to updates through their account dashboard.

Our commitment: every sub-processor we use must meet strict security and compliance requirements. Your data is only ever handled by providers we trust and continuously review.