| 01 | Wyzant | 31.8 |
| 02 | Khan Academy | 31.1 |
| 03 | High-dosage one-on-one tutoring | 30.0 |
| 04 | K12 Tutoring | 30.0 |
| 05 | Varsity Tutors | 28.2 |
| 06 | Reading tutoring | 25.0 |
| 07 | One-on-one tutoring (PreK-1st grade) | 25.0 |
| 08 | teacher-led tutoring | 25.0 |
| 09 | during-school tutoring | 25.0 |
| 10 | small-group tutoring with 2–4 students | 23.1 |
| 11 | Technology-assisted tutoring with human support | 20.3 |
| 12 | Sylvan Learning | 19.3 |
| 13 | Small groups of 3+ students (2nd-5th grade) | 19.2 |
| 14 | Math tutoring | 19.2 |
| 15 | paraprofessional tutoring | 19.2 |
| 16 | peer tutoring | 18.7 |
| 17 | Kumon | 18.6 |
| 18 | Parent tutoring | 16.9 |
| 19 | Nonprofessional/volunteer tutoring | 15.6 |
| 20 | iTutor | 15.4 |
| 21 | Superprof | 12.5 |
| 22 | Huntington | 11.2 |
| 23 | Preply | 9.4 |
| 24 | Skooli | 8.8 |
| 25 | Tutor.com | 7.7 |