Codechef
Founded: 2009
Certification Provided? Yes
About: CodeChef is one of the world’s largest and popular global competitive programming platforms preferred by student & professional programmers. In 2020, CodeChef was added under the aegis of the Unacademy brand.CodeChef also partners with schools, colleges, and student groups to create local CodeChef Chapters, meet-ups, orientation sessions & programming workshops. In addition, CodeChef sponsors coding contests and teams of Indian programmers as part of its Go for Gold Initiative for ICPC & IOI.