The default coding-interview practice platform, with a huge problem set and a strong free tier.
Free plan with 3,000+ problems
Free · Premium $35/mo or $159/yr Visit Site
Coding practice tools
7 tools tagged “Coding practice”, each reviewed against the same criteria: real pricing, verified features, honest pros and cons, and an editorial rating out of 5.
Free coding practice and skill certifications — on the same platform many companies use to screen developers.
Free forever for developers — unlimited practice plus skill certifications at no cost
Starter from $99/mo ($79/mo billed annually) - Enterprise custom pricing Visit Site
Gamified coding practice with community kata across 55+ languages, free at its core
Free core platform forever; Red annual plan saves 30% ($40/yr)
Free · Red from $3.33/mo (billed $40/yr) Visit Site
AI-powered coding practice and skills assessment, from a free tutor app to enterprise hiring.
Free plan with full course access; Cosmo+ premium available at $24.99/mo
Free · Cosmo+ $24.99/mo · Hiring plans from $79/mo Visit Site
Free, mentor-backed coding practice across 80+ programming languages.
Free forever — every core feature including human mentorship is available at no cost.
Free forever (optional donations) Visit Site
Free coding practice and hackathons for developers, plus a paid AI technical-hiring platform.
Free practice · Assessments $99–$399/mo Visit Site
Coding-challenge and interview-prep platform built around the assessments employers actually use.
Free challenges to try before subscribing (no account required to start)
Free challenges · Membership from $35/mo or $150/yr Visit Site