4 organizations provide Drupal services and have requested to be listed here.

Vardot

54 people on Drupal.org
46 projects supported
42 issue credits in the last 90 days
Drupal Association Supporting Partner badge

Sprintive

4 people on Drupal.org
7 projects supported

MediaPlus

6 people on Drupal.org
1 project supported

O-Minds

1 person on Drupal.org