/Companies

GRIND Interactive

Techstars '21

Houston, US · Founded 2017 · 21 employees on LinkedIn · 2 known investors

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GRIND manufactures portable basketball shooting machines and hosts community events that combine sports technology with STEM education for underserved youth. The company aims to connect basketball players with career pathways in engineering and tech fields.

Also known as GRIND Basketball · Grind Interactive Inc. · GRINDBasketball

Founders & leadership

GRIND Interactive was founded in 2017 by Thomas Fields.

TFThomas Fields
Thomas FieldsCEO & FounderThomas Fields is CEO and founder of GRIND Interactive, which manufactures portable basketball training equipment and hosts community events combining sports technology with STEM education. He completed MIT Sloan's Success Initiative program and serves as a board member of TXRX Labs, a nonprofit makerspace.30 Under 30 2022

Investors · 2

Company profile

researched Sep 2026

GRIND Interactive, operating as GRINDBasketball, designs and sells portable basketball shooting and rebounding equipment. Its flagship product, the GRIND Machine [G1], is marketed as the world's first portable basketball shooting machine: it rebounds shots and passes the ball back, delivers up to 1,200 shots per hour when loaded with two basketballs, weighs 110 lbs and folds to 38" x 13" x 18" for transport, with nine locking rotation spots for shooting positions. A patented one-bolt hinge allows the top section to be detached, and the company states a roughly 60-second setup and tear-down process. A second, lower-priced product, the GRIND Gx, is a portable shot rebounder that mounts to a hoop, rebounds makes and misses, rolls the ball back, folds compact at 20-25 lbs and supports up to 800 shots per hour with an unaided 180-degree manual turning radius.

The company positions its equipment for three use cases: at-home practice, school and gym programs and teams, and travelling trainers who move equipment between gyms. Products are sold with a one-year warranty as standard on both machines, with extended coverage plans for the GRIND Machine available at $199 (2 years), $299 (3 years), $499 (5 years) and $799 (8 years). Warranty terms cover hardware functionality issues, netting failures and replacement of the Internal Module, a serviceable assembly the company says contains over 90% of the machine's components; cosmetic damage, misuse and commercial use are excluded, U.S. replacement-part shipping is free while Canadian customers pay shipping, and Internal Module replacements are capped at three per warranty. Alongside hardware, GRIND sells training equipment and an apparel capsule collection.

Founding story

Thomas Fields founded GRIND to offer an affordable, lightweight portable shooting machine for amateur basketball players who previously lacked access to such training equipment.

Business model

GRIND sells hardware directly to consumers and institutions through its own Shopify-based online store, supplemented by extended warranty plans, training equipment, apparel and an affiliate program that pays cash to referrers. Consumer financing for the flagship machine is offered through Affirm at monthly instalments starting around $92-$97.

Revenue comes from one-time product sales of shooting and rebounding machines, accessories and apparel, plus paid extended warranty plans priced from $199 to $799 depending on term length.

Traction

The company markets itself as trusted by thousands of customers and publishes buyer testimonials citing ease of setup, breakdown and customer support. It has appeared on Shark Tank and is a portfolio company of the investor Bronze Valley.

Latest developments

GRIND has expanded from a single flagship product to a two-machine lineup, opening pre-orders for the $399 GRIND Gx hoop-mounted rebounder alongside the $1,995 GRIND Machine [G1], and has added tiered extended warranty plans, a summer apparel capsule and an affiliate program.

▸Full profile — market position, technology, go-to-market, geography, history

Market position

Investor Bronze Valley describes GRIND as providing an affordable, lightweight portable shooting machine for amateur basketball players, positioning the product as widening access to shooting-machine training that was previously limited to well-resourced programs.

GRIND markets portability and price as its principal differentiators: a machine that folds and can be carried between venues, a claimed 75% greater portability and roughly 10x greater practice efficiency versus alternatives, a lower-cost hoop-mounted rebounder option, and a warranty that the company says is the only one in the shooting-machine category to cover normal wear and tear, including full part replacements and replacement-part shipping costs.

Technology

The products are mechanical training devices rather than software. The GRIND Machine uses a patented one-bolt hinge for tool-light detachment and folding, a bungee-cord impact-resistant netting design, and a modular Internal Module that consolidates more than 90% of the machine's components for field replacement. Capacity claims include up to 1,200 shots per hour for the G1 and up to 800 for the Gx.

Go-to-market

Direct-to-consumer e-commerce through grindbasketball.com, with pre-order campaigns for new products, launch bundles, promotional pricing, Affirm financing, customer testimonials, social channels (Facebook, Instagram, YouTube, TikTok), a televised appearance on Shark Tank, and an affiliate program.

Amateur and youth basketball players practising at home, high schools and gyms equipping teams, and independent skills trainers who need equipment that can be moved between facilities.

Geography

Headquartered in Houston, Texas. The online store ships to the United States and Canada (with Canadian customers paying warranty shipping costs) and offers checkout in English and Spanish with currency/region options including the United States, Algeria and Mozambique.

History

Founded by Thomas Fields and based in Houston, Texas, GRIND developed and commercialised the GRIND Machine as a portable basketball shooting machine, gained exposure through an appearance on Shark Tank, attracted backing from Bronze Valley, and subsequently broadened its lineup with the lower-priced GRIND Gx rebounder.

Compiled by commissioned research from 8 cited public sources — announcements, filings, and press listed under research sources below.

Key figures

latest reported
GRIND Gx pre-order priceJan 2026$399
GRIND Gx shots per hour (with 2 basketballs)Jan 2026800 shots per hour
GRIND Gx weightJan 202625 lbs
GRIND Machine [G1] retail priceJan 2026$2K
GRIND Machine [G1] shots per hour (with 2 basketballs)Jan 20261,200 shots per hour
GRIND Machine [G1] weightJan 2026110 lbs

Company-reported or press-reported figures, each dated to when it was claimed — not independently audited.

Related companies · 4

Companies working in the same space as GRIND Interactive.

Timeline · 2

launches, deals, and filings
Jan 2026
GRIND featured on Shark Tank

The company's website promotes the portable shooting machine as having been seen on Shark Tank.

source ↗

Jan 2026
GRIND Gx portable shot rebounder opens for pre-order

GRIND opened pre-orders for the GRIND Gx, a portable shot rebounder that mounts to any hoop, rebounds makes and misses and folds compact, priced at $399 (from $499) with a launch bundle including a ball, jump rope and one-year warranty. The company lists shipping for end of November 2026, while the flagship GRIND Machine [G1] is listed as shipping end of September 2026.

source ↗

Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.

▸Research sources · 8

primary sources listed

8 public sources were cited for this profile; the first-party ones are listed here.

Frequently asked questions

What does GRIND Interactive do?
GRIND makes portable basketball rebounding and shooting machines sold direct to players, schools and trainers.
Who founded GRIND Interactive?
GRIND Interactive was founded by Thomas Fields in 2017.
Who are GRIND Interactive's investors?
GRIND Interactive's investors include Dipalo Ventures, Techstars.
Where is GRIND Interactive headquartered?
GRIND Interactive is headquartered in Houston, US.