STEMcognito is a not-for-profit organisation supporting science communication across STEM disciplines. We host verified academic videos, enabling viewers to watch high-quality presentations produced by professional researchers on demand. STEMcognito is a trusted repository of validated scientific and academic video content in a user-friendly, well-designed environment. Our vision is to advance the public understanding and appreciation of science, technology, engineering, and mathematics (STEM) for the benefit of society. STEMcognito allows viewers to choose from four main subjects and several subfields, with differing levels of complexity, thereby ensuring widespread public engagement opportunities. Additionally, our platform supports scientific communication skill development, with the opportunity for researchers to experience live feedback from the public and fellow professionals, thus widening the impact of the platform. A key goal of our work is to promote a culture of discussion around STEM research and to inspire researchers to connect with non-experts and with one another. Thus, STEMcognito is the only platform that supports outreach (expert to a non-expert) and “inreach” (expert to expert) communication, with the aim of bringing scientists and non-scientists closer together. STEMcognito gives a voice to researchers and eliminates costly stages of specialist video production (such as animations or dubbing). It encourages researchers to fully exploit their existing resources, such as conference presentations. Thus, STEMcognito supports the enhanced use of precious intellectual resources and enhances public engagement with up-to-date scientific content. STEMcognito is free from time zone and location limitations.