United States
Khanmigo
Socratic AI tutor across subjects, from Khan Academy
1/4
7 tools
The best AI tutors
The AI tutors that try to teach across subjects — ranked not by popularity or price, but by whether they fit the exam a student actually sits.
We build learning products too, so we never rank by ad spend or our own interest. System-native tools are listed first; each is read through the Four Mismatches Test.
Scored for fit
| Tool | Curriculum | Language | Price | Infra | Pricing |
|---|---|---|---|---|---|
| KhanmigoUnited Statesscored as an import | ✕ | ✕ | ✓ | ~ | Free for US teachers; ~US$4/month for parents/learners |
| Khan AcademyUnited Statesscored as an import | ✕ | ✕ | ✓ | ~ | Free (donations and grants) |
| Synthesis TutorUnited Statesscored as an import | – | ✕ | ✕ | ~ | ~US$29–45/month (individual) |
| Squirrel AIChinascored: home market | ✓ | ✓ | ~ | ~ | — |
| CK-12 FlexiUnited Statesscored as an import | ✕ | ✕ | ✓ | ✓ | Free |
Fit scored through the Four Mismatches Test: ✓ pass · ~ partial · ✕ fail · – not exam-assessed. Verdicts are framed per each tool’s home market or, for imports, a Commonwealth buyer.
The full field
United States
Khan Academy
Free mastery-based courseware that Khanmigo sits on top of
1/4
United States
Synthesis Tutor
Adaptive, conversational maths tutor for young children
0/4
China
Squirrel AI
Adaptive tutoring at national scale
2/4
United Kingdom
CENTURY Tech
Adaptive learning across subjects for schools
United States
CK-12 Flexi
Free AI tutor built on open courseware
2/4
United States
Merlyn Mind
Voice AI assistant purpose-built for the classroom
Frequently asked questions
- What is the best AI tutor?
- It depends on the exam. Khanmigo is among the best-built for a US or international-track student; for a Commonwealth exam, a system-native platform (Pandai, Embibe) fits where a US-curriculum tutor can't, however good it is.
- What is the best free AI tutor?
- Khan Academy and CK-12's Flexi are genuinely free and non-profit. Free and exam-fitting are different questions, though — a free US-curriculum tutor still teaches the wrong syllabus for a local exam.