GRT Avionics
GRT Avionics designs and sells electronic flight instrument systems, engine monitors, and autopilot servos for experimental and light sport aircraft builders. Founded in 1991 in Wyoming, Michigan, the privately held firm sells direct to homebuilders via e-commerce with modular, expandable pricing.
- Company typePrivate
- Founded1991
- HeadquartersGrand Rapids, United States
- Headcount1–10
- GTM typeB2C
- OfferingHardware or Manufacturing
What GRT Avionics does
GRT Avionics, founded in 1991 and headquartered in Wyoming, Michigan, is a privately held designer and manufacturer of electronic flight instrument systems (EFIS), engine information systems (EIS), and autopilot servos for the experimental and light sport aircraft market. The company's product line spans five current EFIS models—from the compact Mini EFIS Generation II (starting at $1,815) through the flagship Horizon 10.1 (starting at $4,995)—augmented by engine monitors covering 2-stroke through turbine powerplants, ADS-B receivers and transponders, autopilot servos, and an extensive catalog of probes and accessories. All EFIS systems integrate a proprietary Attitude Heading Reference System (AHRS) that, according to the company, is unique in its ability to operate unaided without airspeed, GPS, or magnetic heading.
The business operates a product-led, direct-to-customer model: products are sold through the company's own e-commerce site and phone sales channel without resellers or distributors, targeted at homebuilders who self-install their avionics. A distinctive "only pay for the features you need" modular pricing model lets customers enter at a base configuration and upgrade via software options without removing panel hardware, supported by free US navigation database updates and free firmware downloads. Differentiation rests on the proprietary AHRS, an exclusive EGT Time History engine diagnostic, total system cost claimed at up to 20% below the closest competitor, and broad third-party compatibility with more than 20 avionics brands including Garmin, Trig, uAvionix, and PS Engineering. Customer acquisition relies on a 854-member user forum, aviation events such as SUN 'n FUN, customer demonstration videos, and word-of-mouth within the experimental-builder community. The company employs 1-10 staff and is led by founder and President Greg Toman.
GRT Avionics firmographics
Firmographics- Name
- GRT Avionics
- Legal name
- GRT Avionics
- Website
- https://grtavionics.com
- Company type
- Private
- Founded year
- 1991
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- GRT Avionics designs and sells electronic flight instrument systems, engine monitors, and autopilot servos for experimental and light sport aircraft builders. Founded in 1991 in Wyoming, Michigan, the privately held firm sells direct to homebuilders via e-commerce with modular, expandable pricing.
- Ownership category
- akta.pro rank
GRT Avionics industry classification
Industry- Product category
- Experimental Aircraft Avionics
- NAICS
- Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing (334511)
- SIC
- Search, Detection, Navagation, Guidance, Aeronautical Sys (3812)
- akta.pro primary industry
- Integrated Modular Avionics (IMA) & Avionics Computing Platforms (IMABAFAI)
- akta.pro secondary industry
- Flight Control Computers & Autopilot Systems (IMABAFAA)
Keywords
Where GRT Avionics is headquartered
LocationHeadquarters
- HQ city
- Grand Rapids
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
GRT Avionics business model
Business model- GTM type
- B2C
- Offering type
- Hardware or Manufacturing
- Cost components
- Personnel, Technology or R&D, Supply Chain, Operations, Marketing or Sales, Infrastructure
Revenue model
- EFIS Hardware Sales: Sale of Electronic Flight Instrument Systems including Horizon 10.1, Sport 10.1, Horizon EX, Sport EX, and Mini EFIS. Hardware includes built-in AHRS and air data. Software options allow customers to expand features over time.
- EIS Engine Monitor Sales: Sale of Engine Information System monitors for various engine types including 2-stroke, 4-stroke, turboprop and turbine engines. Available in 4, 6, and 9-cylinder configurations.
- ADS-B and GPS Products: Sale of ADS-B receivers, transponders, and GPS modules including the GRT Discovery ADS-B receiver and Safe-Fly 2020 GPS.
- Autopilot Servo Systems: Sale of autopilot servos with various torque specifications and mounting kits for different aircraft types.
- Accessories and Probes: Sale of magnetometers, serial port expanders, ARINC modules, OAT probes, pressure sensors, fuel flow sensors, current sensors, and USB accessories.
- Navigation Database: Free US navigation database updates. Optional Jeppesen database subscription for international coverage.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| One time/ perpetual license | Pay-as-you-go | Horizon 10.1 EFIS - Full-featured flagship display |
| One time/ perpetual license | Pay-as-you-go | Sport 10.1 EFIS - Large PFD with moving maps |
| One time/ perpetual license | Pay-as-you-go | Horizon EX EFIS - Upgrade from Horizon WS |
| One time/ perpetual license | Pay-as-you-go | Sport EX EFIS - Entry-level PFD |
| One time/ perpetual license | Pay-as-you-go | Mini EFIS Generation II - Compact backup or primary |
| Unit Pricing | Pay-as-you-go | EIS Engine Monitors |
| Unit Pricing | Pay-as-you-go | ADS-B and GPS Products |
| Unit Pricing | Pay-as-you-go | Autopilot Servos |
| Unit Pricing | Pay-as-you-go | EFIS Accessories |
Go-to-market motion1 record
Distribution channels2 records
Marketing channels5 records
GRT Avionics product offering
Product offeringCore offering
GRT Avionics designs, manufactures and sells glass-cockpit Electronic Flight Instrument Systems (EFIS) and complementary avionics for experimental/homebuilt aircraft. Its product line spans full-featured 10.1-inch EFIS displays (Horizon 10.1, Sport 10.1), upgrade and entry-level EX models, the compact Mini EFIS (Generation II), Engine Information Systems (EIS) for 2-stroke through turbine engines, ADS-B/GPS/transponder products, autopilot servos, COM/NAV radios, and a broad accessory ecosystem. All sales are conducted direct-to-builder through the company's own e-commerce site and phone sales, supported by documentation, a user forum and free U.S. navigation database updates.
Product overview
GRT Avionics offers a comprehensive suite of Electronic Flight Instrument Systems (EFIS) for experimental aircraft, ranging from ultralights to twin-engine and turbine-powered aircraft. The product portfolio centers on five current EFIS models: Horizon 10.1 (flagship full-featured system), Sport 10.1 (value-oriented with moving maps), Horizon EX (WS upgrade), Sport EX (entry-level expandable), and Mini EFIS Generation II (compact 3-1/8" form factor). All EFIS systems feature the industry's only AHRS that operates unaided without airspeed or GPS. Complementary products include the EIS (Engine Information System) engine monitors available in multiple configurations for 2-9 cylinder engines, ADS-B receivers and transponders, autopilot servos, communication/navigation radios, and various sensors/probes. GRT emphasizes third-party compatibility with equipment from Garmin, Trig, PS Engineering, uAvionix, and others. The company has been building avionics since 1991 with headquarters in Wyoming, Michigan.
Differentiator
Problem solved
Functional benefit
Products and services
- Horizon 10.1 EFIS Flagship full-featured 10.1-inch (1280x800) IPS EFIS display with internal AHRS and Air-Data, autopilot-ready, ADS-B capable, and remote control for up to 2 COM, 2 NAV radios, transponder, intercom and audio panel; 6 analog inputs, 6 discrete outputs, 12 serial ports, dual USB, Ethernet for multiple displays, and support for sectionals, airport diagrams, en-route charts and approach plates via Seattle Avionics. Starting at $4,995.
- Sport 10.1 EFIS 10.1-inch primary flight display with moving maps, internal AHRS and Air-Data, synthetic vision (10 mile range), obstacle alerting, ADS-B traffic/weather, angle-of-attack sensing, GRT Safe-Touch touchscreen option, and direct-mount Safe-Fly GPS option. Starting at $3,850.
- Horizon EX EFIS Upgrade path from Horizon WS; uses existing AHRS and wiring with minor modifications. Includes synthetic vision (30 mile range), IFR autopilot function with vertical commands, moving map, ADS-B traffic/weather, Bluetooth and 6 high-speed serial ports; optional touchscreen. Starting at $3,075.
- Sport EX EFIS Entry-level PFD built on GRT's unaided AHRS, with base primary flight functions and engine pages via GRT EIS. Includes synthetic approach to any runway, obstacle depiction, and options for touchscreen, moving map/ADS-B, synthetic vision, additional serial ports and basic engine monitoring. Starting at $2,095 (base) / $2,775 (Basic) / $3,150 (Advanced) / $3,850 (Advanced Touch).
- Mini EFIS (Generation II) Compact EFIS mounting in a 3-1/8-inch hole with 4.3-inch 800x480 display, suitable as primary or backup flight display. Built on GRT's unaided AHRS, IFR-certifiable altitude/vertical speed/airspeed, 15 Hz map rotation, HSI with OBS selector, angle-of-attack sensing, ADS-B traffic/weather, NexRad, and GRT Remote App integration. Starting at $1,815.
- EIS Engine Monitors Engine Information System instruments for 2-stroke through turbine engines, with EGT Time History, CHT Time History, specific fuel consumption, percent power and engine-limit warning lights. Models include EIS 4000 (4-cyl, $1,075), EIS 6000 (6-cyl, $1,125), EIS 9000 (9-cyl, $1,380), EIS 2002 (2-stroke, $555), EIS 2004 (4-stroke, $665), EIS 4000 Turbine/Turboprop ($1,075) and EIS R66 ($1,255), each with wiring harness.
- EIS Engine Monitor Packages Pre-configured engine monitoring bundles with sensors and configuration for specific engines: Corvair, Jabiru, Lycoming/Continental, M14P, Rotax 912/914, UL Power, Viking and Volkswagen.
- EIS Probes and Sensors Sensors for EIS engine monitoring systems, including CHT probes (8 types), EGT probes (4 types), temperature probes (6 types), pressure sensors (5 types), fuel flow sensors (3 types including EI FT-60 Red Cube and FloScan) and current sensors (2 types).
- Discovery Dual Band ADS-B Receiver GRT's own dual-band ADS-B receiver covering 978 MHz UAT and 1090 MHz ES for traffic and weather on EFIS displays. Sends aircraft ID, AHRS and GPS data to the receiver for filtering and app use, with field-updatable receiver software. $775.
- Safe-Fly 2020 ADS-B Compliant GPS Module FAA-acknowledged ADS-B 2020 compliant GPS module meeting 14 CFR 91.227; mounts directly to the back of Sport 10.1 and Horizon 10.1 EFIS displays, simplifying installation and supporting PAPR eligibility. $650.
- Trig TT23 Transponder Remote-mode ADS-B Out transponder with altitude encoding and TIS-A traffic display when paired with GRT EFIS systems. $2,265.
- GRT Autopilot Servos Clutch-less, single-gear-reduction autopilot servos with shearable output arm, captive safety mechanism, motor temperature sensing and pitch servo with optical force-sensing trim indication. Available as Standard Torque ($910), High Torque ($960), with or without capstan ($1,015 / $1,075); mounting kits available for RV series and universal fit.
- VAL Avionics COM-2KR Panel-Mounted COM Radio Panel-mounted COM radio from Val Avionics, compatible with GRT EFIS systems for communication functionality and full remote control on 10.1/HXr displays. $1,350.
- VAL Avionics NAV-2KR Panel-Mounted NAV Radio Panel-mounted NAV radio from Val Avionics, compatible with GRT EFIS systems for navigation functionality. $2,840.
- Trig TY91 Remote Compact VHF Radio Remote compact VHF radio compatible with GRT EFIS systems, with full remote-control support on Horizon 10.1 and HXr. $1,365.
- Digital Magnetometer External digital magnetometer providing heading and wind data to GRT EFIS systems. $250.
- Serial Port Combiner/Expander Module for combining or expanding serial ports on GRT EFIS systems to support flexible panel connectivity. $385.
- ARINC-429 Module Interface module enabling ARINC 429 connectivity between GRT EFIS systems and IFR GPS navigators such as the Garmin GNS 430/530 and GTN 650/750. $550.
- Outside Air Temperature Probe (OAT-03) Machined-aluminum outside air temperature probe that wires to EIS or EFIS displays with analog inputs. $118.
Quantifiable outcome
- Total system cost up to 20% less than closest competitor
- +1 more outcomes
Companies that use GRT Avionics
Customer profileNamed customers2 records
Segments2 records
Ideal customer profiles2 records
GRT Avionics technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration51 records
AI capability8 records
Feature7 records
GRT Avionics partnerships and signals
Strategic signalPartnerships
Four partnerships are on record, tiered core.
- Trig AvionicscoreGRT EFIS systems are compatible with Trig TT23/TT22/TT21 transponders, TY91 remote COM radio, and TT31 transponders. Equipment supplements available for installation and configuration. GRT provides dedicated adapter cables (TT22-ADPT-SC, TT22-ADPT-DC) and supports Trig TY91 TMAP mode interface.
- GarmincoreFull compatibility with Garmin GTX 330-ES, GTX 327, GTX 330, GTX 345 transponders, GNS 430/530/480 series navigators, GTN 650/750 series, GPS 175/GNC 355/GNX 375, GTR200/GTR205/GTR225 panel radios, and GNC215/GNC255 NAV/COM radios. GRT supports sending GPS data to newer Garmin radios.
- uAvionixcoreCompatible with uAvionix echoUAT (ADS-B UAT In/Out) and tailBeaconX transponders. Full remote interface support for TailBeaconX including transponder functions and GPS input.
- StratuxcoreGRT systems support Stratux Raspberry Pi-based ADS-B receivers for traffic and weather display. Serial output patch files available for Stratux. Supplement documentation provided.
Scale indicators4 records
Recent moves6 records
Expansion highlights6 records
GRT Avionics competitors and assessment
Company assessmentMarket position
Competitive moat5 records
Key risks5 records
Key highlights7 records
Customer concentration
GRT Avionics social profiles
Digital presenceGRT Avionics financial estimates
Financial estimateRevenue estimate
Valuation estimate
GRT Avionics leadership team
Management profileNumber of profiles
Profiles1 record
GRT Avionics funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
GRT Avionics M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about GRT Avionics
What does GRT Avionics do?
GRT Avionics designs, manufactures and sells glass-cockpit Electronic Flight Instrument Systems (EFIS) and complementary avionics for experimental/homebuilt aircraft. Its product line spans full-featured 10.1-inch EFIS displays (Horizon 10.1, Sport 10.1), upgrade and entry-level EX models, the compact Mini EFIS (Generation II), Engine Information Systems (EIS) for 2-stroke through turbine engines, ADS-B/GPS/transponder products, autopilot servos, COM/NAV radios, and a broad accessory ecosystem. All sales are conducted direct-to-builder through the company's own e-commerce site and phone sales, supported by documentation, a user forum and free U.S. navigation database updates.
Is GRT Avionics a public or private company?
GRT Avionics is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was GRT Avionics founded?
GRT Avionics was founded in 1991. It employs 1 to 10 people.
Where is GRT Avionics based?
GRT Avionics is headquartered in Grand Rapids, United States, in the North America region.
How does GRT Avionics make money?
Six revenue lines are on record. EFIS Hardware Sales are the primary driver. The others are EIS Engine Monitor Sales, ADS-B and GPS Products, autopilot Servo Systems, accessories and Probes and navigation Database.
Does GRT Avionics have an API?
No public API is recorded for GRT Avionics.
What industry is GRT Avionics in?
GRT Avionics's product category is Experimental Aircraft Avionics. Its primary akta.pro industry code is IMABAFAI, Integrated Modular Avionics (IMA) & Avionics Computing Platforms, with a secondary code of IMABAFAA, Flight Control Computers & Autopilot Systems. Its NAICS code is 334511 and its SIC code is 3812.