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© 2026 Lettermark Partners Limited in partnership with the BUILD IN LONDON (NATIONAL) TRUST, a registered social enterprise in England and Wales (No. 17088725).

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SpaceXSI London Office - Build in London

SpaceXSI photo 1

SpaceXSI

ScaleupAI

SpaceXSI builds Grok — frontier AI models for reasoning, voice, image generation, and more. Build with the Grok API.

Locations

London, United Kingdom (UK Headquarters)

20 Air Street, London, Greater London, W1B 5AN, United Kingdom

Palo Alto, United States (Global Headquarters)

1450 Page Mill Road, Palo Alto, California, 94304, United States

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Primary sector

AI

Location

20 Air Street, London, Greater London, W1B 5AN, United Kingdom