Self-Serve Development & Coaching

TraitLab Pro vs. Sigma: Modern Platform vs. Research Instruments

Sigma Assessment Systems publishes some of the most respected personality instruments in academic psychology — the Personality Research Form (PRF) and Jackson Personality Inventory-Revised (JPI-R) have decades of peer-reviewed validation behind them. TraitLab Pro builds on similarly established science (Big Five, Enneagram, Jungian typology) but packages it as a modern, self-serve platform designed for coaches, HR professionals, and team leads rather than clinical psychologists. The tradeoff here is between academic-grade individual instruments with deep research pedigrees and a unified platform that delivers six frameworks from a single assessment without professional qualification requirements.

Quick verdict

TraitLab Pro

Choose TraitLab Pro if you want accessible, multi-framework personality insights from one assessment without professional qualification barriers — especially for team development and coaching.

Sigma Assessment Systems

Choose Sigma Assessment Systems if you are a psychologist or I/O consultant who needs specific research-grade instruments like the PRF or JPI-R for academic or clinical work.

Side-by-side comparison

Assessment

	TraitLab Pro	Sigma Assessment Systems
Personality Model	Big Five + established frameworks (Enneagram, Jungian, RIASEC)	Multiple research instruments: Personality Research Form (PRF), Jackson Personality Inventory-Revised (JPI-R), Six Factor Personality Questionnaire (SFPQ), MEIA-R (emotional intelligence)
Traits/Dimensions Measured	Customizable: Personality Traits, Strengths, Working Style, Interpersonal Style, Jungian Typology, Enneagram Typology	PRF: 22 personality traits; JPI-R: 15 personality scales; SFPQ: six broad personality factors; MEIA-R: emotional intelligence facets
Scientific Basis	Peer-reviewed, research-validated instruments based on Big Five	Highly cited academic instruments; PRF and JPI developed by Douglas Jackson; extensive peer-reviewed validation
Customizability	Mix-and-match assessment areas; compact 20-min option	Fixed instruments; choose from portfolio based on assessment need

Personality Model

TraitLab Pro

Big Five + established frameworks (Enneagram, Jungian, RIASEC)

Sigma Assessment Systems

Multiple research instruments: Personality Research Form (PRF), Jackson Personality Inventory-Revised (JPI-R), Six Factor Personality Questionnaire (SFPQ), MEIA-R (emotional intelligence)

Traits/Dimensions Measured

TraitLab Pro

Customizable: Personality Traits, Strengths, Working Style, Interpersonal Style, Jungian Typology, Enneagram Typology

Sigma Assessment Systems

PRF: 22 personality traits; JPI-R: 15 personality scales; SFPQ: six broad personality factors; MEIA-R: emotional intelligence facets

Scientific Basis

TraitLab Pro

Peer-reviewed, research-validated instruments based on Big Five

Sigma Assessment Systems

Highly cited academic instruments; PRF and JPI developed by Douglas Jackson; extensive peer-reviewed validation

Customizability

TraitLab Pro

Mix-and-match assessment areas; compact 20-min option

Sigma Assessment Systems

Fixed instruments; choose from portfolio based on assessment need

Implementation

	TraitLab Pro	Sigma Assessment Systems
Setup Model	Fully self-serve; free account creation	Purchase through SigmaTesting.com platform; qualifications may be required
Certification/Training Required	None	Some instruments require professional qualifications (psychology background)
Time to First Assessment	Minutes (sign up, purchase credits, send link)	Order and setup through SigmaTesting platform; qualification verification if needed
ATS/HR System Integration	No	No (focused on assessment delivery, not hiring workflow)
Scalability	Any scale; credit-based, no minimums	$50 minimum purchase; scales through credit purchases

Setup Model

TraitLab Pro

Fully self-serve; free account creation

Sigma Assessment Systems

Purchase through SigmaTesting.com platform; qualifications may be required

Certification/Training Required

TraitLab Pro

None

Sigma Assessment Systems

Some instruments require professional qualifications (psychology background)

Time to First Assessment

TraitLab Pro

Minutes (sign up, purchase credits, send link)

Sigma Assessment Systems

Order and setup through SigmaTesting platform; qualification verification if needed

ATS/HR System Integration

TraitLab Pro

Sigma Assessment Systems

No (focused on assessment delivery, not hiring workflow)

Scalability

TraitLab Pro

Any scale; credit-based, no minimums

Sigma Assessment Systems

$50 minimum purchase; scales through credit purchases

User experience

	TraitLab Pro	Sigma Assessment Systems
Assessment Duration	10-60 min (customizable); 20 min compact option	Varies by instrument: shorter questionnaires to comprehensive inventories
Device Support	Mobile and desktop	Online via SigmaTesting platform
Question Format	Short multiple choice	Varies by instrument: true/false, Likert scales, preference items
Results Delivery	Instant, digital, self-serve for both test taker and admin	Reports generated through SigmaTesting platform; professional interpretation recommended
Admin Portal	Yes — view, compare, manage all results	SigmaTesting dashboard for managing assessments and reports

Assessment Duration

TraitLab Pro

10-60 min (customizable); 20 min compact option

Sigma Assessment Systems

Varies by instrument: shorter questionnaires to comprehensive inventories

Device Support

TraitLab Pro

Mobile and desktop

Sigma Assessment Systems

Online via SigmaTesting platform

Question Format

TraitLab Pro

Short multiple choice

Sigma Assessment Systems

Varies by instrument: true/false, Likert scales, preference items

Results Delivery

TraitLab Pro

Instant, digital, self-serve for both test taker and admin

Sigma Assessment Systems

Reports generated through SigmaTesting platform; professional interpretation recommended

Admin Portal

TraitLab Pro

Yes — view, compare, manage all results

Sigma Assessment Systems

SigmaTesting dashboard for managing assessments and reports

Pricing

	TraitLab Pro	Sigma Assessment Systems
Pricing Model	Per-assessment credits; transparent, published pricing	Per-assessment through SigmaTesting.com; ~$26-30 USD/CAD per test
Entry Price	$49/assessment (1 credit)	~$26-30/assessment
Volume Price	$24/assessment (100+ credits)	Volume pricing available; consulting services priced separately
Annual Minimums/Subscriptions	None	$50 minimum purchase
Hidden Costs	None (no training, certification, or consulting fees)	Consulting services (executive coaching, succession planning) are separate; professional qualification may be required
Free Tier/Trial	Free account; credits required for assessments	No free tier

Pricing Model

TraitLab Pro

Per-assessment credits; transparent, published pricing

Sigma Assessment Systems

Per-assessment through SigmaTesting.com; ~$26-30 USD/CAD per test

Entry Price

TraitLab Pro

$49/assessment (1 credit)

Sigma Assessment Systems

~$26-30/assessment

Volume Price

TraitLab Pro

$24/assessment (100+ credits)

Sigma Assessment Systems

Volume pricing available; consulting services priced separately

Annual Minimums/Subscriptions

TraitLab Pro

None

Sigma Assessment Systems

$50 minimum purchase

Hidden Costs

TraitLab Pro

None (no training, certification, or consulting fees)

Sigma Assessment Systems

Consulting services (executive coaching, succession planning) are separate; professional qualification may be required

Free Tier/Trial

TraitLab Pro

Free account; credits required for assessments

Sigma Assessment Systems

No free tier

Use case fit

	TraitLab Pro	Sigma Assessment Systems
Pre-employment Screening & Hiring	Not supported	Secondary
Employee Development & Team Building	Primary	Secondary
Leadership Development & Succession Planning	Secondary	Primary (consulting services)
Coaching & Professional Development	Primary	Primary (for qualified professionals)

Pre-employment Screening & Hiring

TraitLab Pro

Not supported

Sigma Assessment Systems

Secondary

Employee Development & Team Building

TraitLab Pro

Primary

Sigma Assessment Systems

Secondary

Leadership Development & Succession Planning

TraitLab Pro

Secondary

Sigma Assessment Systems

Primary (consulting services)

Coaching & Professional Development

TraitLab Pro

Primary

Sigma Assessment Systems

Primary (for qualified professionals)

Key differences

Sigma Assessment Systems's advantages

Research-grade instruments with extensive academic citation history
PRF and JPI are among the most highly validated personality instruments in psychology
Lower per-assessment cost (~$26-30 vs. $24-49)
Executive coaching and succession planning consulting services available
4M+ assessments conducted over 55+ years
Deep credibility with clinical and academic audiences

TraitLab Pro's advantages

Fully self-serve with no professional qualification requirements
Six assessment frameworks in one platform vs. separate instruments
Modern, mobile-friendly assessment experience
Instant results delivered directly to test takers and admins
No professional qualification barriers — accessible to managers, coaches, and HR
Compact 20-minute assessment option covering multiple frameworks

About Sigma Assessment Systems

Strengths

Academically rigorous instruments with decades of peer-reviewed validation
Comprehensive consulting services for leadership and succession planning
Lower per-assessment pricing
Deep credibility in psychology and I/O consulting communities
Broad instrument portfolio covering personality, emotional intelligence, and more

Trade-offs

Some instruments require professional qualifications — limits accessibility
Less modern user experience compared to contemporary platforms
No ATS integration; focused on assessment delivery, not hiring workflow
Individual instruments rather than an integrated, multi-framework platform
Not designed for self-serve team-building or employee development at scale
Consulting services add significant additional cost

The bottom line

Sigma and TraitLab Pro both value scientific rigor, but they serve different audiences. Sigma's instruments — the PRF (22 traits), JPI-R (15 scales), and SFPQ (6 factors) — are individually respected in academic psychology, and Sigma's per-assessment pricing (~$26-30) is competitive. But some instruments require professional qualifications, each covers a single framework, and the platform experience reflects its academic roots. TraitLab Pro delivers six frameworks from one 20-60 minute assessment at $24-49 per credit, accessible to anyone. For credentialed professionals who need specific research instruments, Sigma has the deeper catalog. For everyone else doing development and coaching work, TraitLab Pro is more practical.

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See what TraitLab Pro measures

Six validated personality frameworks from a single 20-minute assessment. No certification required.

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