Company details
Updated 30 September 2026
Sunzu, Inc. fully owns Alpha Base OS Ltd. Sunzu is the service brand used by the group. The provider named in your order or signed agreement is your contracting party.
United States and rest of world: Sunzu, Inc.
- Legal entity
- Sunzu, Inc.
- Jurisdiction
- Delaware, United States
- Delaware corporation file number
- 10756833
- Legal-notice address
- Sunzu, Inc.
c/o Techstars
1615 Pearl St.
Boulder, CO 80302
USA - Service territory
- United States and all countries outside the UK, Switzerland and EEA
- Contact
- hello@sunzu.com
UK, Switzerland and EEA: Alpha Base OS Ltd
- Registered name
- ALPHA BASE OS LTD
- Jurisdiction
- England and Wales, United Kingdom
- Company number
- 16212608
- Registered office
- 71–75 Shelton Street, Covent Garden, London WC2H 9JQ, United Kingdom
- VAT number
- GB488054656
- ICO registration
- C1103931
- Ownership
- Wholly owned by Sunzu, Inc.
- Service territory
- United Kingdom, Switzerland and European Economic Area
- Contact
- hello@sunzu.com
View the Companies House record.
EU GDPR representative: Elkyn Europe OÜ
Elkyn Europe OÜ, an Estonian company (registry code 16448398), is the appointed representative of Alpha Base OS Ltd under Article 27 of the EU GDPR. This appointment concerns Alpha Base OS Ltd; it does not appoint Elkyn Europe OÜ for Sunzu, Inc. or make Elkyn Europe OÜ your service provider.
Contact the representative directly at gdpr@elkyn.com or by post: Elkyn Europe OÜ, GDPR Representative, Ahtri tn 12, Kesklinna linnaosa, Tallinn, Harju maakond, 10151, Estonia. This is the representative’s designated correspondence address. You may contact the representative directly without first contacting Sunzu.
Your contracting company
Your signed agreement continues to identify your provider unless a change is separately agreed or notified in accordance with that agreement. The parent/subsidiary relationship does not itself change your contract.
Legal and privacy contacts
For company enquiries, legal notices or privacy requests, write to hello@sunzu.com. Include the relevant company and, for an existing customer, your organisation or account reference. See how to exercise your privacy rights or make a complaint.