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Sub-processors

Last updated 1 November 2026 · Lilium Group Ltd (company number 17549926)

These are the sub-processors HeyWilliam uses to process Client Personal Data under our Data Processing Addendum. We give clients at least 30 days’ notice by email before adding or replacing one.

Sub-processor What it does Location of processing Transfer mechanism
Cloudflare, Inc. Website and application hosting (Cloudflare Pages and Workers), the application database (Cloudflare D1) and its backups, DNS and security Database in the United States (Western North America); requests served from Cloudflare’s global network UK Extension to the EU-US Data Privacy Framework, with the UK Addendum to the EU SCCs as a fallback
OpenAI OpCo, LLC AI model processing of Prompts and Client Materials to produce Generated Output for the Will agent United States UK Addendum to the EU SCCs, in OpenAI’s Data Processing Addendum

Gmail and Outlook are not our sub-processors. When you connect a mailbox, Google or Microsoft keeps providing that mailbox to you under your own agreement with them, and HeyWilliam reads and sends mail in it as an External Integration you control.

HeyWilliam

Will does the export paperwork. You say yes. Made in London.

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HeyWilliam is a product of Lilium Group Ltd, a company registered in England and Wales (company number 17549926).

Registered office: 4th Floor Office, 205 Regent Street, London, W1B 4HB, United Kingdom.

Email hello@heywilliam.co.uk

© 2026 Lilium Group Ltd. All rights reserved.

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