- Boomer Tennis Robot
 - Device from Robot Optimizers Incorporated which has the ability to serve, return, play out a point, call the lines, score, and rate your shots. - Eagnas Racquet Stringing Machines
- Lobster Sports Inc.
- Sells a portable line of tennis ball machines.
- M2 Unlimited, Inc.
- Offers a training wristband designed to keep the racquet properly positioned for ground strokes, volleys, and serves.
- Master Sports
- Supplier of ball machines and retrievers.
- Prince
- Designs and manufactures racquets for tennis, squash, badminton, and racquetball.
- Silent Partner
- Maker of tennis ball machines, stringing machines, and racquet strings.
- Sports Tutor
- Manufacturer of battery and A/C powered portable tennis ball machines.
- Wilson Tennis
- Offers tennis rackets, ball, strings, grips, bags, and more.
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