Legal
Subprocessors
Last updated: July 29, 2026
modsignal uses the following third-party services (“subprocessors”) to operate the platform. Your account data, monitor configurations, snapshots, and alert history are stored in the European Union; each entry below notes where that vendor processes data.
We will update this page whenever we add or remove a subprocessor. If you would like to be notified of changes, watch this page — or ask modsignal to do it for you. Questions go to hello@modsignal.io.
Database (PostgreSQL) and user authentication
User accounts, team data, monitor configurations, prompts, page snapshots, alert history, session tokens
EU (Frankfurt, Germany)Hosting for the dashboard (Next.js app) and marketing site
HTTP requests to the dashboard and marketing site, session cookies
EU (Frankfurt, Germany)AI analysis for the semantic and browser-agent check tiers
Fetched content of monitored public pages and monitor prompts, processed per-check; not used for model training under Anthropic's commercial API terms
USQStash message queue for scheduling monitor checks; single-use sandboxes (Upstash Box) that run browser-agent checks
Scheduling: monitor IDs and schedule payloads. Browser-agent checks: URLs of monitored public pages and their rendered content, processed in a sandbox that is deleted when the check ends
EU (Frankfurt) / US (N. Virginia)Payment processing and subscription management
Billing details, payment methods, invoices, subscription status
EU (Dublin, Ireland)Alert and transactional email delivery
Email addresses, alert content (change sentence, before/after evidence), invitation links
EU (Frankfurt, Germany)Where your data lives
Data at rest — accounts, monitors, snapshots, alerts — is stored exclusively in EU data centers. Per-check processing on the semantic and browser-agent tiers happens in the US — Anthropic for AI analysis, Upstash Box sandboxes for browser-agent checks — where page content is handled transiently and not retained.
Public pages only
The content flowing through these subprocessors comes from publicly accessible web pages you chose to monitor, plus the prompts you wrote. modsignal does not monitor pages behind logins and does not collect personal data from monitored pages.
Contact
Questions about our subprocessors or data processing? Contact us at hello@modsignal.io.