| 01 | Saga Education | 57.8 |
| 02 | Wyzant | 52.1 |
| 03 | accelerate.us | 41.0 |
| 04 | The Princeton Review | 37.6 |
| 05 | Tutor.com | 36.4 |
| 06 | Khan Academy | 36.0 |
| 07 | School-based programs | 31.5 |
| 08 | district programs | 25.6 |
| 09 | Tutor.com High-Dosage Tutoring | 24.1 |
| 10 | Reading Corps | 23.1 |
| 11 | Preply | 22.3 |
| 12 | Khanmigo | 21.0 |
| 13 | Math Corps | 20.3 |
| 14 | School-provided high-impact tutoring | 20.1 |
| 15 | nssa.stanford.edu | 19.7 |
| 16 | Revolution Prep | 19.6 |
| 17 | U.S. Department of Education's What Works Clearinghouse | 18.7 |
| 18 | support.khanacademy.org | 18.2 |
| 19 | Varsity Tutors | 18.1 |
| 20 | Evidence for ESSA | 17.7 |
| 21 | Johns Hopkins | 16.9 |
| 22 | Mathnasium | 16.3 |
| 23 | Kumon | 15.7 |
| 24 | Schoolhouse.world | 15.2 |
| 25 | Sal Khan | 14.8 |
| 26 | Brainfuse | 13.9 |