Tennibot Partner vs. Aceii: Not all ball machines are created equal.

If you're deciding between Tennibot Partner and a Kickstarter project like Aceii One, here's what you need to know.

1. Proven Track Record vs. Beta-Stage Prototype

The Tennibot is the result of years of development, customer feedback, and iterations. It’s been used by USTA coaches, top academies, and thousands of recreational players worldwide. We ship within 6-7 weeks of receiving an order. Aceii One is a Kickstarter prototype that’s still working through early design issues and hasn’t yet proven long-term reliability. This means if they deliver, the most likely delivery date for them is May 2026.

2. Real Mobility: All around court Mobility vs. Baseline Movement

The Aceii is limited to moving back and forth on the baseline on all their online videos. While useful but very limited. When playing against a real opponent, they tend to move all around the court (this mean approach shots, drop shots and volleys).

By contrast, Tennibot uses industrial-grade all-surface rubber wheels to move all around the court without being restricted to any specific location on the court. Think baseline deep topspin forehand shots followed by a short backhand dropshot from inside the service line. Only the Partner can do that!

3. Vision System That Works — Full-Court, All Conditions

The Partner’s computer vision is powered by a proprietary algorithm built for all lighting conditions, surfaces, and ball types. Each system includes the Tennibot Station, which uses three synchronized 4K cameras to deliver full-court coverage.

Aceii's approach? Front-facing camera. This significantly limits the accuracy of ball landing and overall ballistic model of the ball machine since you are not using multiple cameras.

4. Built with Safety in mind

The Tennibot Partner includes advanced safety protocols with five ultrasonic sensors and vision systems designed to detect people and obstacles in real time. It automatically pauses movement when it detects interference, ensuring a safer environment for players and bystanders.

To date, we have not seen public documentation of Aceii including onboard obstacle detection or collision avoidance. For parents, coaches, and facilities focused on safety, this distinction may be especially important.

5. US-Based, Human Support — With Real Guarantees

Tennibot is proudly US-based, with assembly and fulfillment handled in Auburn, Alabama. We offer a 3-year warranty, 60-day money-back guarantee, and yes—an actual phone number you can call.

Aceii is currently being developed overseas, and while details may evolve, there is limited public information available regarding its fulfillment model, post-purchase support, or return policy. We encourage potential customers to verify those details before purchasing.

Plus, the Tennibot Partner has been tested live at major conferences and trade shows, including our latest demo event—over 250 players got to experience it on court. Watch the recap here.