Sub-processors
Version 1 · Effective 2 October 2026
1. Sub-processors
These providers process personal data on our behalf to run CompanyStack.
| Provider | What they do | Data involved | Location |
|---|---|---|---|
| Stripe | Card payments, subscriptions, invoices and the billing portal | Billing name, email and address, card details, subscription and invoice history | Ireland and the United States |
| Contabo GmbH | Server hosting for our database, API, website, mail server and analytics | All data held in the Service | Germany (EU) |
| RapidAPI | API marketplace, billing and request routing, for customers who subscribe through RapidAPI only | Marketplace account identifiers, API requests and billing details | United States |
| Anthropic | Reading scanned and paper-filed company accounts from the public Companies House register, to extract their figures | Images of filed accounts pages, which can include the names and signatures of company officers. No customer data is sent. | United States |
Stripe and RapidAPI are also controllers of some data for their own purposes, such as fraud prevention and their own billing, under their own privacy notices.
2. Data sources and other third parties
| Organisation | Role | Notes |
|---|---|---|
| Companies House | Data source. Not a processor. | We obtain public register data from Companies House. We do not send it any of our customers' personal data. |
| CARTO | Map images. Not a processor. | On pages with a map, your browser loads map images from basemaps.cartocdn.com, which receives your IP address to deliver them. |
Other public data sources are listed on our data sources page. None of them receives our customers' personal data.
3. Services we run ourselves
We run our own mail server and our own copy of the Rybbit analytics software on our Contabo servers, so no email or analytics provider receives your data. Our website fonts are hosted on our own server rather than loaded from Google Fonts.
4. Changes to this list
We will update this page before a new sub-processor starts handling personal data. Business customers who want to be told about changes by email, or to object to a new sub-processor, can ask at support@companystack.co.uk.