Stemettes is a social enterprise which encourages girls and young women aged 5–25 to pursue careers in Science, Technology, Engineering, and Maths (STEM).

Stemettes runs panel events, hackathons, the Student to Stemette mentoring programme supported by Deutsche Bank, Outbox Incubator and an app, OtotheB, an online platform for girls interested in STEM and entrepreneurship.

Stemettes was started in 2013 by British mathematics and computing child prodigy Anne-Marie Imafidon.

The organisation is regularly called upon by the UK Government and European Commission to consult on matters related to women in STEM.

[citation needed] For six weeks from July–August 2015, Stemettes ran Outbox Incubator in London.