  The ecosystem of artificial intelligence competitions is a diverse and
multifaceted landscape, encompassing a variety of platforms that each host
numerous competitions annually, alongside a plethora of specialized websites
dedicated to singular contests. These platforms adeptly manage the overarching
administrative responsibilities inherent in orchestrating competitions, thus
affording organizers the liberty to allocate greater attention to other facets
of their contests. Notably, these platforms exhibit considerable diversity in
their operational functionalities, economic models, and community dynamics.
This chapter conducts an extensive review of the foremost services in this
realm and elucidates several alternative methodologies that facilitate the
independent hosting of such challenges. Keywords: competition platform,
challenge hosting services, comparison.

Machine Learning;Artificial Intelligence