Koydo vs. Brilliant
Brilliant teaches STEM through visual, interactive problem-solving for adults and motivated teens. Koydo covers STEM as part of an age-aware platform that also spans reading, humanities, test prep, and 56 languages.
Feature by feature
| Feature | Koydo | Brilliant |
|---|---|---|
| Price (entry tier) | Free Limited, $0 / no card | Free preview, no full free tier |
| Price (paid tier) | Plus $9 / mo · Family $17 / mo | ~$13.49 / mo (annual) or $24.99 / mo (monthly) |
| Subject coverage | Math, reading, science, humanities, languages, test prep — all subjects in one plan | STEM only — math, CS, data, physics, quantitative finance |
| Age coverage | Early-elementary → graduate / professional | Teen → adult (motivated learners) |
| Format | Mixed — adaptive practice, lessons, games, AI tutor | Visual interactive problem-solving |
| AI tutor | Everyday Tutor on every paid plan | Limited — explanations are written, not conversational |
| Languages | 56 languages for study | English (UI translated) |
| Test prep verticals | NCLEX, CDL, Matura, IELTS, JEE, ENEM, AP/IB, more | None |
| Per-learner profiles (family) | Up to 4 on Family · unlimited on School | Single learner per account |
| Offline access | Yes on Plus and above | Yes on premium |
| Operator | KOYDO LLC | Brilliant Worldwide, Inc. |
Which one fits your learner
When Koydo fits better
- Your household has multiple learners at different ages
- Your learner needs reading, humanities, languages, or test prep in addition to STEM
- Your learner is under-12 and you need age-appropriate pacing
- You want adaptive practice + AI tutoring bundled together
When Brilliant fits better
- The learner is an adult or motivated teen focused exclusively on STEM
- Visual, puzzle-driven problem-solving is the preferred study mode
- You want deep coverage of quantitative finance or data analysis
About this comparison
Last updated May 16, 2026 by Koydo Lyceum. Comparison data reflects publicly-stated competitor features at the time of writing.