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Sub-Processors.
A complete list of the outside companies we share limited data with in order to run Keystone IQ. Last updated July 2026.
Who we share data with
Running Keystone IQ means relying on a handful of specialist companies behind the scenes — the same way a property manager might use a separate accountant, a locksmith, or a background-check service instead of doing everything in-house. In privacy language, each of these companies is called a "sub-processor": a vendor we share a limited, specific slice of your data with so they can do one job for us, like sending an email or securely hosting our servers.
We never sell your data, and we only share what each vendor needs to do its one job. This page lists every sub-processor we currently use, and what we use them for. For the full picture of what we collect and why, see our Privacy Policy.
Current sub-processors
Infrastructure & Hosting
- Google Cloud Platform — Application hosting, database, and file storage.
- Google Gemini / Vertex AI — AI-powered document extraction and analysis of uploaded financial documents.
- Firebase Authentication — User identity and session management (sign-in and account security).
Product Features
- SendGrid — Transactional email delivery (account, billing, and portfolio notifications).
- ipapi.co — IP-to-approximate-location lookup at account sign-up and demo request.
- RentCast — Property valuation data — only queried when you request an automated valuation.
- Plaid — Secure, read-only connection to your bank and mortgage accounts to import transactions and balances when you choose to link an account. Keystone IQ can never move money through this connection.
- Stripe — Payment processing and subscription billing. Keystone IQ never sees or stores your raw card number — Stripe Elements collects payment details directly.
- Mapbox — Property cover-image rendering and address geocoding for the Properties page.
Operations
- Twilio — Optional SMS delivery for internal admin operational alerts — not customer-facing.
- PostHog — Pseudonymous product usage analytics (keyed to your account ID, never your name) to help us improve the platform. Form inputs are masked in session replay.
- Linear — Issue tracking — bug reports and demo requests are mirrored to a private workspace for engineering follow-up.
- Sentry — Error monitoring — stack traces and request context for uncaught exceptions.
- Better Stack — Uptime monitoring and the public status page (status.keystoneiq.app) — processes visitor IP addresses of people who view the status page; no customer account data.
Questions about this list, or a specific vendor relationship? Email us at support@keystoneiq.app.