Circadian

What Circadian does

CIRCADIAN Technologies, Inc. is a privately held US consulting and software firm founded in 1983 and headquartered in Stoneham, Massachusetts, specializing in workforce performance and safety solutions for 24/7 and shift-based operations. The company serves enterprise customers across more than eleven industries including discrete and process manufacturing, food manufacturing, energy and power generation, surface transportation, mining and metals, pharmaceuticals, aviation, and healthcare. Named customers include Microsoft, 3M, Siemens, Procter & Gamble, Toyota, Mars, Bayer, Moderna, Eli Lilly, Thermo Fisher Scientific, National Grid, and DHS, among others.

The company's core technology is the CAS (Circadian Alertness Simulator), a biomathematical fatigue risk model patented since 1993 and validated over 25+ years against real-world incidents across diverse 24/7 environments. CAS combines homeostatic, circadian, and sleep inertia factors to convert uploaded work schedules (CSV/XML) into fatigue risk scores on a 0-100 scale, classified into green, yellow, and red risk zones. Supporting software includes the Schedule Risk Analyzer, TrainMatch and TrainSim and FRCOS for freight rail crew optimization, and FACTS for accident-incident analysis. Service offerings span the Shift Schedule Optimization Process (SSOP), Fatigue Risk Management Systems (FRMS) implementation, on-site management workshops, online fatigue training programs, corporate sleep programs, risk and cost assessment, and human fatigue expert witness testimony.

CIRCADIAN generates revenue through a mix of custom-priced multi-year enterprise consulting engagements delivered by principal consultants, recurring CAS software subscriptions via the webcas.circadian.com platform, recurring online training subscriptions through fatiguetrainingonline.com, on-site management workshops, and one-time publication and report sales through its online store. Go-to-market is primarily enterprise field sales supported by content marketing (white papers, case studies, blog, a 32,000+ subscriber newsletter, webinars, and self-assessment tools). The firm has no external institutional investors and is independently owned.

Name

Circadian

Legal name

CIRCADIAN Technologies, Inc.

Website

https://circadian.com

Company type

Private

Founded year

1983

Operating status

Operating

Headcount range

51–100 employees

Short description

CIRCADIAN Technologies is a US-based consulting and software firm, founded in 1983, that provides fatigue risk management, shift scheduling optimization, and 24/7 workforce consulting services to enterprise clients across manufacturing, energy, transportation, mining, healthcare, and pharmaceutical industries.

Ownership category

akta.pro rank

Product category

Shift Work Consulting & Fatigue Risk Management

NAICS

Human Resources Consulting Services (541612)

SIC

Services-Management Consulting Services (8742)

akta.pro primary industry

Payroll, Time & Attendance (BPACAPAB)

akta.pro secondary industries

Workforce Management Administration (Labor Forecasting, Rostering, OT Rules) (BPAAAHAD), Time, Attendance & Scheduling Administration (BPACAIAE)

Keywords

• Shift scheduling consulting
• Fatigue risk management
• 24/7 workforce solutions
• Circadian alertness simulation
• Shift work safety

Headquarters

HQ city

Stoneham

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Others

Revenue model

1. Consulting Services: CIRCADIAN provides consulting engagements for shift scheduling optimization, fatigue risk management systems implementation, staffing analysis, and workplace assessments. Services are delivered through principal consultants on-site and include operational analysis, education programs, and implementation support.
2. CAS Software Subscriptions: The Circadian Alertness Simulator (CAS) is available via web-based subscription at webcas.circadian.com. Users upload work schedules and receive fatigue risk scores. The CAS Fatigue Risk Model provides assessments for individual or multiple employee work schedules.
3. Publications and Reports: CIRCADIAN sells white papers, reports, and educational publications including titles such as 'Staffing Levels - Key to Managing Risk in 24/7 Operations', 'Alternative Work Schedules', 'Biocompatible Shift Scheduling', 'The Advantages and Disadvantages of 12-hour Shifts', and 'Increasing Production Beyond the Five Day Operation'. Available through the CIRCADIAN Store.
4. Training Programs: Online fatigue training programs including Shiftworker and Supervisor training available through fatiguetrainingonline.com. Corporate sleep programs and shiftwork lifestyle training are also offered.
5. Management Workshops: On-site management workshops delivered at client facilities, including 'Successfully Expanding from 5- to 7-Day Operations' and other custom training programs for managers.

Pricing tiers

Go-to-market motion2 records

Distribution channels5 records

Marketing channels8 records

Core offering

CIRCADIAN sells consulting engagements and proprietary software that help 24/7 operators optimize shift schedules, assess and manage fatigue risk, and train workforces. Offerings include on-site consulting delivered by principal consultants, the CAS biomathematical fatigue simulation tool available via subscription, Shift Schedule Optimization Process (SSOP) workshops, fatigue risk management systems implementation, and online training for shiftworkers and supervisors. The portfolio targets safety-sensitive industries such as manufacturing, energy, transportation, mining, pharmaceuticals, and healthcare.

Product overview

CIRCADIAN is a 24/7 workforce performance and safety solutions company offering a portfolio of software tools and consulting services. The core product is the CAS (Circadian Alertness Simulator), a biomathematical fatigue risk model with 25+ years of validation. Supporting software includes the Schedule Risk Analyzer (with Schedule Compliance and Fatigue Risk Analyzer modules), TrainMatch™, TrainSim™, FRCOS™ for freight rail operations, and Accident-Incident Analysis with FACTS. The service portfolio includes Shift Scheduling Consulting (with optimization processes and management workshops), Fatigue Risk Management Systems (FRMS), Education & Training programs (including Fatigue Training Online), Corporate Sleep Programs, Risk & Cost Assessment, Human Fatigue Expert Witness Testimony, and Publications & Reports. The software tools work alongside consulting services to provide comprehensive workforce optimization for businesses operating around the clock.

Differentiator

Problem solved

Functional benefit

Products and services

• CAS (Circadian Alertness Simulator) Subscription-accessed biomathematical fatigue risk model that converts uploaded work schedules into individual or group fatigue risk scores (0–100) by combining homeostatic, circadian, and sleep inertia factors. Built for safety, operations, and HR leaders at 24/7 enterprises in transportation, manufacturing, energy, and other safety-sensitive industries.
• Fatigue Risk Management Software Suite of software tools for managing fatigue risk in 24/7 operations, including schedule risk analysis and fatigue assessment capabilities, sold to enterprise safety and operations teams.
• Schedule Risk Analyzer Self-serve tool combining a Schedule Compliance Analyzer and a Schedule Fatigue Risk Analyzer that exposes hidden operational risks (high-risk patterns, operational strain, benchmarking) for 24/7 operators.
• Accident-Incident Analysis with FACTS Software tool that analyzes accidents and incidents for fatigue-related causation in 24/7 operations, used by safety and risk teams to support investigations.
• TrainMatch, TrainSim, and FRCOS (Freight Rail Crew Optimization Software) Suite of three rail-specific software products: TrainMatch identifies train-pairings that meet regulatory and union requirements without hurting efficiency; TrainSim simulates combinations of traffic, rules, and crew schedules to find weak points; FRCOS combines traffic analysis, schedule development, monitoring, what-if simulation, and database maintenance for freight rail crew scheduling.
• Shift Scheduling Consulting Engagement-based consulting for 24/7 operators that includes schedule risk assessment, SSOP-driven shift schedule optimization, and management workshops delivered by principal consultants.
• Fatigue Risk Management Systems (FRMS) Comprehensive FRMS development and implementation service for safety-sensitive businesses, covering policy, risk assessment, mitigation, and assurance aligned with global standards and ANSI FRMS requirements.
• Education & Training Programs In-person and curriculum-based training for managers, supervisors, and employees covering shiftwork lifestyle, fatigue management, and trainer-of-trainers enablement.
• Corporate Sleep Programs Corporate-wide sleep education and training programs for all employees, including those working standard hours, designed to improve alertness, health, and productivity.
• Fatigue Training Online Subscription-accessed online training including Shiftworker training and Supervisor training for managing operator fatigue in 24/7 enterprises.
• Risk & Cost Assessment Analytical service that evaluates opportunities and risks for 24/7 operations, including ROI calculations for implementing countermeasures, drawing on a 500+ facility benchmarking dataset.
• Human Fatigue Expert Witness Testimony Expert witness services for claims of human fatigue impairment in accident litigation, leveraging CIRCADIAN's 40+ years of fatigue research and CAS-based analysis.
• Publications & Reports White papers, reports, and educational publications covering shift scheduling, fatigue risk management, and 24/7 workforce optimization, sold directly via the CIRCADIAN online store.

Quantifiable outcome

• 40% reduction in employee turnover at a large US manufacturer, with $3.8 million in annual savings
• +11 more outcomes

Named customers29 records

Segments1 record

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability4 records

Feature7 records

Scale indicators10 records

Recent moves6 records

Expansion highlights5 records

Market position

Competitive moat5 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/CircadianInc
• Facebookfacebook.com/circadiantechnologies
• LinkedInlinkedin.com/company/circadian-technologies

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 Circadian