Tennis In/Out

What Tennis In/Out does

Tennis In/Out (legal entity In/Out) is a privately held California-based company that develops and sells a portable, AI-powered tennis line-judge system. The core product is the Net Device — a camera-equipped unit that mounts on any tennis net post and uses computer vision and deep learning to detect ball bounces and call lines in real time at millimeter-level accuracy. Optional Line Devices add redundancy along specific baselines for higher-tier accuracy. The hardware works in conjunction with a free cloud platform that provides shot placement maps, serve and shot speed analytics, and an AI Coach that generates opponent-specific tactical recommendations, plus companion iOS and Android apps for live streaming, stats review, and firmware updates.

The company has released four hardware generations since 2017 (v1.0, v1.1, v2.0, v3.0, and v4.0 in December 2024), with monthly firmware updates maintained through at least March 2026. Tennis In/Out sells exclusively through direct e-commerce on its own inout.tennis storefront (with localized versions in English, French, Spanish, Brazilian Portuguese, Italian, and Japanese) at price points of $299 (Casual), $499 (Serious Amateur), and $999 (Club & Pro), using Stripe as the sole payment processor. The business model is one-time hardware purchase with no subscription fees and free lifetime cloud services; accessories (protective cages, power kits, mounts) provide ancillary revenue. Distribution is augmented by a global ambassador/affiliate program paying 7.5–10% commissions, influencer partnerships (e.g., tennis creator Ian Westermann), and athlete endorsements (WTA Grand Slam champion Samantha Stosur). Tennis In/Out also extends the device to pickleball and badminton, and is protected by multiple international patents covering the AI line-calling technology and device design.

Name

Tennis In/Out

Legal name

In/Out

Website

http://inout.tennis/en/index.htm

Company type

Private

Founded year

2016

Operating status

Operating

Headcount range

1–10 employees

Short description

Tennis In/Out (In/Out) is a California-based company that sells a portable, AI-powered camera system that mounts on a tennis net post to call lines, record matches, and deliver cloud-based stats and coaching for amateur and club players.

Ownership category

akta.pro rank

Product category

Sports Technology Hardware

NAICS

Sporting Goods Retailers (45911)

SIC

Sporting & Athletic Goods, Nec (3949)

akta.pro primary industry

Tennis Equipment & Accessories Retail (CRAMAFAA)

akta.pro secondary industry

Racquet Sport Training Aids & Practice Equipment Retail (CRAMAFAJ)

Keywords

• AI sports technology
• Tennis line judging
• Computer vision sports
• Portable sports hardware
• AI coaching platform

GTM type

B2C

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Technology or R&D, Operations, Marketing or Sales, Personnel

Revenue model

1. Hardware Sales: One-time hardware purchase revenue from Net Devices and Line Devices sold at three pricing tiers. Includes free lifetime firmware updates and cloud services. No recurring subscription fees. Revenue is generated entirely from initial hardware purchase with optional additional device purchases for expanded accuracy.
2. Accessories: Additional purchases including protective cages, power kits, extra batteries, chargers, straps, umbrellas, and mounting hardware for the In/Out system.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Tennis In/Out sells a portable, AI-powered line judge hardware system (Net Device + optional Line Devices) that mounts on a tennis net post and uses computer vision to call lines in real time with millimeter accuracy, record full-court HD video, and stream pro-level match statistics and AI-driven opponent coaching to a companion mobile app. Hardware is sold as a one-time purchase ($299–$999) with free lifetime cloud services, AI coaching, and firmware updates — no subscription fees.

Product overview

In/Out is a portable AI-powered line judge system for tennis (with Pickleball support). The system consists of Net Device v4.0 (the main camera unit that mounts on the net post like a chair umpire), optional Line Devices (supplementary sensors for baseline accuracy like line umpires), and a free cloud platform with AI Coach analytics. The one-time purchase device uses computer vision to call lines with millimeter accuracy, records full-court video, and provides pro-level statistics. Companion iOS/Android apps enable live streaming and stats review. Hardware pricing ranges from $299 (1 Net Device for casual use) to $999 (2 Net Devices + 6 Line Devices for club/pro maximum accuracy). All cloud features and firmware updates are free forever with no subscription.

Differentiator

Problem solved

Functional benefit

Products and services

• In/Out Cloud Platform Cloud-based analytics platform providing AI Coach opponent analysis, shot placement maps, serve speed analysis, match statistics, and data export capabilities. Free with no subscription required.
• In/Out Companion App (Android & iOS) Companion smartphone application for stats review, live streaming from the device, AI coach reports, and firmware upgrades. Available on Google Play and Apple App Store.
• In/Out AI Line Judge System Portable AI-powered line calling system for tennis that uses computer vision to detect ball bounces and call lines in real time with millimeter accuracy. Mounts on any net post in under a minute. Sold in three configurations: Casual ($299), Serious Amateur ($499), and Club & Pro ($999).
• Net Device v4.0 Main hardware device that mounts on the tennis net post, functioning as a chair umpire. Contains dual cameras for court monitoring, performs auto-calibration, and generates audio/visual line calls.
• Line Device Supplementary sensor device installed along specific lines (typically baselines) to provide additional accuracy for line calling. Works in conjunction with the Net Device, similar to how line umpires assist chair umpires.
• In/Out Pickleball Support Sport-specific mode supporting pickleball. Requires different mounting (stand instead of net post attachment) and positioning at 36 inches height, 48 inches behind side line.
• In/Out Cage Protective cage for the Net Device with optional umbrella for hot conditions, small lock, and protection cover. Can be installed permanently with metal circles.
• Power Kit Fixed installation kit enabling permanent power supply from a power outlet. Includes USB cables, USB hub, and T-tap Y connectors for powering multiple devices.
• In/Out Ambassador Program Affiliate marketing program allowing ambassadors to earn 7.5% commission on system sales by promoting In/Out to tennis partners, friends, or clubs. Free registration; no inventory required; paid quarterly via bank transfer.

Quantifiable outcome

• 9mm average accuracy verified by ITF testing on LTA courts - 10x more accurate than human line judges
• +3 more outcomes

Named customers2 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability7 records

Feature5 records

Partnerships

One partnership is on record.

• StripecoreTechnology or IntegrationStripe handles all payment processing on the In/Out website store. Customer credit card information is entered directly into Stripe's payment service and is NOT stored on In/Out servers at any time. Stripe is the only payment method available on the In/Out website.

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Hawk-Eye Innovations (Sony): The dominant provider of computer-vision ball-tracking and electronic line-calling technology used across the ATP, WTA, and other professional tennis tours. Directly comparable because it solves the same line-calling problem with camera-based AI, though at the professional venue level rather than portable consumer form factor.
• PlaySight: Provider of AI-powered video and analytics platforms for tennis and other racquet sports, with smart-court installations at clubs and academies. Comparable because it serves the same tennis performance analytics use case with computer vision, primarily in the club/academy segment that In/Out targets with its $999 tier.
• Babolat Play: Connected tennis racquet and sensor products from a major tennis equipment manufacturer that capture shot and stroke data. Comparable because it is a tennis-specific consumer hardware product aimed at performance tracking, though attached to the racquet rather than the net post.
• HEAD Tennis Sensors (Sony): Tennis racquet-mounted sensor systems (developed with Sony) that capture swing and impact analytics for consumer players. Comparable because it is a consumer tennis hardware product generating AI-driven shot analytics for amateurs, the same customer profile as In/Out.

Emerging players

• Zepp Labs: Sports sensor and AI coaching products (originally Zepp Tennis) that attach to equipment and deliver stroke analytics via a companion app. Comparable as a consumer sports-AI hardware entrant with a free-companion-app model and focus on coaching feedback, though without court-level line calling.
• Catapult Sports: Provider of athlete wearable GPS/IMU tracking and analytics for professional teams across multiple sports. Comparable in the sports-performance analytics category and in selling to high-end teams/academies, but focused on wearable load monitoring rather than court-based ball tracking.
• KinaTrax: Markerless motion-capture and biomechanics platform used in professional baseball and other sports for player tracking. Comparable as a computer-vision sports analytics vendor targeting professional teams, though its application is biomechanics rather than officiating.
• ShotTracker: Sensor-based basketball shot and movement tracking system used by teams and consumers. Comparable as a sport-specific AI tracking hardware product sold into both consumer and team segments, though applied to basketball rather than tennis.

Broad incumbents

• Hudl: Largest video analysis platform in team and individual sports, offering AI-powered tagging, statistics, and coaching workflows. Comparable because it ingests sports video and serves coaches/athletes with analytics, though it is software-only and lacks tennis-specific line-calling hardware.
• Stats Perform: Major sports data and AI analytics provider covering tennis (e.g., WTA/ATP data feeds) and many other sports. Comparable in delivering AI-driven sports analytics to professional and broadcast customers, though it does not offer consumer hardware.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/inout_tennis
• Facebookfacebook.com/InOut.Tennis

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Tennis In/Out