What Limestone Technologies does

Limestone Technologies Inc. is a U.S.-based manufacturer of computerized polygraph systems and companion examination software, headquartered in Lafayette, Indiana. The company's product stack centers on the ParagonX Polygraph System, a professional-grade data acquisition instrument with a native 625 samples-per-second per channel rate, dual-channel 32-bit architecture, and optical isolation above 5000 mv, packaged with two software platforms: the legacy Polygraph Pro Suite (database management, ChartSync audio/video synchronization, ReportBuilder+, multiple scoring algorithms) and the next-generation LXEdge (modern UI, Spanish language support, touch screen compatibility, forthcoming assisted scoring). Supporting accessories — respiration transducers, blood pressure assemblies, activity sensors, and portable subject chairs — round out a vertically-integrated polygraph examination ecosystem.

Limestone operates as a wholly-owned subsidiary of Lafayette Instrument Company following its August 2022 acquisition, inheriting the parent's 70+ year global sales infrastructure, a dedicated European distribution division (Lafayette Instrument Europe, England), and integrated digital marketing. The business model is hardware-led: one-time capital equipment sales of polygraph systems at premium price points, one-time software licenses, accessories, and a trade-in upgrade program ($1,500 Paragon/$500 DataPac credits toward ParagonX). GTM is sales-led with B2B quote-based pricing targeted at a narrow customer base of professional polygraph examiners serving U.S. federal agencies, approved international government agencies, and law enforcement. Products are subject to U.S. Department of Commerce export licensing, restricting distribution to approximately 20 approved countries.

The company is privately held with 1-10 employees and does not publicly disclose revenue. Its customer segments are concentrated in government and law enforcement, with regulatory moats around export controls and switching costs tied to proprietary hardware/software/scoring methodologies (ESS-M statistical scoring, OSS-3 automated feature extraction).

Name

Limestone Technologies

Legal name

Limestone Technologies Inc.

Website

https://limestonetech.com

Company type

Private

Founded year

2009

Operating status

Operating

Headcount range

1–10 employees

Short description

Limestone Technologies designs and manufactures computerized polygraph systems (ParagonX) and examination software (Polygraph Pro Suite, LXEdge) for professional examiners serving U.S. federal agencies, law enforcement, and approved international governments.

Ownership category

akta.pro rank

Product category

Polygraph Equipment & Forensic Instrumentation

NAICS

Analytical Laboratory Instrument Manufacturing (334516), Navigational, Measuring, Electromedical, and Control Instruments Manufacturing (3345)

SIC

Laboratory Analytical Instruments (3826)

akta.pro primary industry

Analytical Instruments & Chromatography Systems (HLAGAIAA)

akta.pro secondary industry

Metrology, Calibration & Testing Equipment (Balances, pH/DO, Standards) (HLAGAIAL)

Keywords

• Polygraph equipment
• Data acquisition systems
• Physiological measurement
• Forensic instrumentation
• Credibility assessment

Headquarters

HQ city

Lafayette

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Polygraph Hardware Systems: Sale of computerized polygraph systems including the ParagonX and legacy Paragon and DataPac series. These are one-time capital equipment purchases with 3-year Total Care Warranty included.
2. Software Licenses and Updates: Sale of Polygraph Pro Suite and LXEdge software. Software requires valid serial number registration for download. Updates distributed through the website with version tracking (current versions: Polygraph Pro Suite v4.6.3.2, LXEdge v1.5.0).
3. Accessories and Replacement Parts: Sale of polygraph accessories including arm cuffs, blood pressure assemblies, respiration transducers, activity sensors, sphygmomanometers, carrying cases, and portable chairs.
4. System Upgrades and Trade-ins: Trade-in discount programs allowing customers to upgrade from older systems (Paragon: $1500, DataPac: $500 credit) toward new ParagonX systems.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels4 records

Core offering

Limestone Technologies manufactures and sells computerized polygraph systems and companion software for professional examiners. The flagship ParagonX hardware performs physiological data acquisition, while the Polygraph Pro Suite and LXEdge software platforms handle chart recording, scoring, reporting, and audio/video synchronization for polygraph examinations. The company also sells a range of accessories such as respiration transducers, blood pressure cuffs, and activity sensors.

Product overview

Limestone Technologies offers a comprehensive polygraph examination system comprising hardware instruments and companion software. The core offering is the ParagonX Polygraph System (Model ParagonX-S), a computerized polygraph with 625 samples/second sampling rate and dual-channel 32-bit architecture. This is supported by two software platforms: Polygraph Pro Suite (legacy software with ChartSync synchronized audio/video, ReportBuilder+, and multi-format scoring) and LXEdge (next-generation software built on modern architecture with enhanced UI and upcoming assisted scoring). The product ecosystem includes essential accessories such as respiration transducers (upper/lower pneumatic), activity sensors, blood pressure assemblies, and a portable subject chair. Legacy product lines (Paragon Series and DataPac Series) remain supported. Since August 2022, Limestone Technologies has operated as a subsidiary of Lafayette Instrument Company.

Differentiator

Problem solved

Functional benefit

Brands

• ParagonX: Professional polygraph system with industry-leading 625 samples per second sampling rate, dual channel 32-bit data acquisition, and optical isolation greater than 5000 mv.
• Polygraph Pro Suite
• LXEdge

Products and services

• ParagonX Polygraph System

Quantifiable outcome

• 3 Year Total Care Warranty included with ParagonX system
• +2 more outcomes

Named customers2 records

Segments2 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration2 records

AI capability3 records

Feature5 records

Partnerships

One partnership is on record.

• Lafayette Instrument CompanycoreStrategic or Co-development Partner · 1 August 2022In August 2022, Limestone Technologies Inc. became a subsidiary of Lafayette Instrument Company. Lafayette Instrument Company has over 70 years of experience engineering data acquisition and measurement instrumentation and is positioned at the forefront of neuroscientific discovery, human evaluation, and credibility assessment. Lafayette continues to provide customers with best-in-class products and support.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Emerging players

• BIOPAC Systems: Manufacturer of life science data acquisition hardware and software (AcqKnowledge) capturing physiological signals similar to those measured by polygraphs. Comparable as an instrumentation competitor in adjacent academic and research markets.
• Shimmer Sensing: Supplies wearable wireless physiological sensors (GSR, ECG, respiration) and development platforms. Comparable sensor technology to the respiration, EDA, and cardiovascular channels measured by Limestone polygraphs, though positioned for continuous wearable use.
• Noldus Information Technology: Provides behavioral observation, biometrics, and human physiology recording software/hardware platforms used in research and human evaluation. Overlaps with Limestone's physiological data acquisition focus but serves a broader research and academic market.
• iMotions: Offers biometric research platforms combining eye tracking, GSR, EEG, and facial coding for human behavior analysis. Adjacent to polygraph-style physiological measurement and serves some of the same credibility/neuroscience research customers.
• CleveMed (Clinical Research Solutions): Provides physiological data acquisition and biosensor systems used in research and clinical environments. Overlaps with Limestone's data acquisition technology in collecting cardiovascular and respiration signals.

Direct peers

• Stoelting Company: Long-standing supplier of psychological and physiological measurement instruments, including polygraph and related credibility assessment tools. Comparable in that it sells instruments, scoring software, and accessories to examiners, researchers, and behavioral health professionals.
• Axciton Systems: Manufacturer of computerized polygraph systems (CX, AX series) targeting law enforcement, government, and private examiners in the U.S. and internationally. Most direct head-to-head competitor to Limestone's ParagonX in the professional polygraph segment.
• Decision Dynamics Inc. Provides polygraph-related instruments, training, and credibility assessment services to government and law enforcement. Direct overlap in customer base (federal/state examiners) and product category with Limestone's ParagonX offering.
• Lafayette Instrument Company (Lafayette Polygraph division): Parent company's own polygraph division (LX6, LX7 systems) sells into the same professional examiner and law enforcement customer base as Limestone's ParagonX. Highly relevant as both operate under one corporate umbrella and share distribution, support, and European sales infrastructure.

Broad incumbents

• Compumedics (Neuroscan): Broader neurodiagnostic and PSG instrumentation company with roots in EEG and polysomnography measurement. Comparable in capturing multi-channel physiological data with proprietary hardware/software stacks, though serving clinical sleep and neurodiagnostic markets.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xtwitter.com/lafayetteic
• YouTubeyoutube.com/channel/UCNafkmRm3w4hUSq4AIDNrow
• Facebookfacebook.com/LimestoneTech
• LinkedInlinkedin.com/company/limestone-technologies-inc-
• Instagraminstagram.com/lafayetteinstrument

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 Limestone Technologies