For all sales inquiries, please use our online sales form.
Or call/text: +1 (415) 857-4857
M-F: 8a to 8p PT

Technical Support

Consult our online resources prior to submitting a support request.
Still have a question? Please complete our support form.


For all press inquiries, please email
For reference, our online press kit can be found here.


Interested in becoming a krtkl partner? Please email


To help us advance STEM education, please email


krtkl’s legal policies can be found here.
For other legal matters (NDAs, licensing, etc.), please email

krtkl inc.

350 Townsend Street

Suite 301A

San Francisco, California 94107

United States of America

Ph: +1 (415) 857-4857

krtkl ltd

Unit 6 Queens Yard

White Post Lane

London E9 5EN

United Kingdom