Oppi AI

What Oppi AI does

Oppi AI Oy is a Helsinki, Finland-based applied-AI company founded in 2018 by Taras Zagibalov, a computational-linguistics PhD (University of Sussex) with more than a decade of experience across AI, natural language processing, and data science — spanning early NLP research at Brandwatch, EdTech, and now hiring assessment. The company operates a single commercial product, WorkProbe, which is a hiring assessment platform designed for what the company terms "the AI era." WorkProbe measures "judgment under ambiguity" — whether a candidate's independent reasoning holds up when an AI assistant gives a confident but incorrect answer — and targets B2B employers and hiring organizations as its primary customer segment. The company positions itself as addressing a gap in traditional hiring processes, which it argues test knowledge recall rather than the critical-evaluation skills required when working alongside AI systems.

The underlying technology is centered on a proprietary "anti-sycophancy architecture" that Zagibalov built end-to-end and is described as the sole invention of the founder. WorkProbe uses text-based assessment scenarios in which candidates are presented with AI-generated responses and must identify confidently incorrect outputs, applying natural language processing and anomaly-detection capabilities. The methodology is framed as research-grounded in peer-reviewed evidence from MIT, Harvard, and Nature Human Behaviour, though specific studies are not cited in the public materials. No patents, published research papers, or external benchmarks are disclosed, and the boundary between in-house model development and third-party AI dependencies is not publicly documented. The company website describes its philosophy as "judgment-first" — measuring whether AI improves a decision rather than whether it appears impressive.

The business model is not publicly disclosed. Pricing is not listed on either oppi.ai or workprobe.com, no funding rounds are recorded (the company appears bootstrapped and founder-owned with no external shareholders), and revenue is not reported. Distribution is via self-serve web access through workprobe.com, with marketing driven primarily through the corporate website, the product website, and LinkedIn organic social, supplemented by PR and earned media. Geographic operation is centered in Finland, serving European markets without a claimed global footprint. GDPR compliance is documented via the published privacy policy, with EU-region sub-processors (Vercel, PostHog EU, Resend) and Standard Contractual Clauses for any international transfers. The company has been recognized in the ARCTIC15 2026 Top 100 Innovations list for WorkProbe.

Name

Oppi AI

Legal name

Oppi AI Oy

Website

https://oppi.ai

Company type

Private

Founded year

2018

Operating status

Operating

Headcount range

1–10 employees

Ownership category

akta.pro rank

Product category

Talent Assessment Software

NAICS

Employment Placement Agencies (561311), Employment Services (5613)

SIC

Services-Employment Agencies (7361), Services-Prepackaged Software (7372)

akta.pro primary industry

Skills Assessment & Talent/Employability Testing Platforms (EDAFADAM)

akta.pro secondary industries

Safety & Alignment Evaluation (red-teaming, harmful capability testing) (HDAAAMAL), AI Observability, Monitoring & Evaluation Platforms (Drift, Quality, Safety) (HDAEANAF)

Keywords

• Hiring assessment platform
• AI skills assessment
• Candidate evaluation tools
• Talent assessment software
• Judgment testing

Headquarters

HQ city

Lahti

HQ country

Finland

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Distribution channels1 record

Marketing channels4 records

Core offering

Oppi AI builds WorkProbe, a hiring assessment platform that measures candidates' "judgment under ambiguity" — specifically testing whether a candidate's independent reasoning holds up when an AI assistant gives a confident, wrong answer. The platform uses a proprietary anti-sycophancy architecture (invented end-to-end by founder Taras Zagibalov) and is grounded in peer-reviewed research from MIT, Harvard, and Nature Human Behaviour. It targets B2B employers that need to evaluate candidates' ability to critically assess AI-generated outputs.

Product overview

Oppi AI is an applied-AI company with a single product focus: WorkProbe. WorkProbe is a hiring assessment tool designed for the AI era that measures candidates' judgment under ambiguity — specifically their ability to identify confident but incorrect AI responses. The product is grounded in peer-reviewed research from MIT, Harvard, and Nature Human Behaviour, and features a proprietary anti-sycophancy architecture invented by founder Taras Zagibalov. The company positions WorkProbe as the first practical application addressing the hiring challenge created by unreliable AI assistants.

Differentiator

Problem solved

Functional benefit

Brands

• WorkProbe: Hiring assessment product that measures judgment under ambiguity - whether a candidate's independent reasoning holds up when an AI assistant gives a confident, wrong answer. Grounded in peer-reviewed research from MIT, Harvard, and Nature Human Behaviour.

Products and services

• WorkProbe WorkProbe is a hiring assessment platform that measures "judgment under ambiguity" — evaluating whether candidates can identify when an AI assistant gives a confident but incorrect answer. The assessment tests independent reasoning that holds up when AI is wrong, addressing a gap in traditional hiring processes for the AI era. It is designed for employers and hiring organizations that need to identify candidates who can critically evaluate AI outputs.

Segments1 record

Ideal customer profiles1 record

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability3 records

Feature1 record

Scale indicators1 record

Expansion highlights4 records

Direct peers

• iMocha: Skills assessment and talent analytics platform used for pre-hire skills testing and benchmarking. Direct peer to WorkProbe as a B2B assessment vendor selling to enterprise talent acquisition and HR teams.
• HireVue: Enterprise hiring assessment platform combining video interviews, game-based, and AI-scored assessments. Directly comparable to WorkProbe as a B2B assessment tool evaluating candidate fit for employers, though with a much broader suite of assessment types and far greater scale.
• Vervoe: AI-powered skills testing platform that ranks candidates by job-relevant task performance. Direct peer combining AI-based candidate evaluation with employer B2B GTM, very similar buyer and use case to WorkProbe.
• TestGorilla: Pre-hire skills assessment platform offering a library of tests employers can send to candidates. Direct peer in the B2B hiring-assessment category, competing for the same employer buyer with standardised, evidence-based test content.
• Codility: Technical skills assessment platform for evaluating developer candidates, widely used by enterprise engineering hiring teams. Direct peer in the online pre-hire assessment space with a focus on standardised, science-backed scoring.
• Pymetrics (Harver Pymetrics): AI-driven soft-skills and cognitive assessment for hiring, using gamified tasks and behavioural data. Direct peer given its AI-based candidate evaluation focus, serving enterprise employers and recruiters with predictive hiring assessments.

Emerging players

• Plum: AI-based talent assessment and matching platform using behavioural and cognitive data to predict candidate fit. Comparable in applying AI to pre-hire candidate evaluation, serving HR and talent acquisition teams at growing companies.
• Filtered: AI-augmented technical and skills assessment platform for enterprise hiring, focused on reducing time-to-hire. Emerging peer in the same B2B assessment category, with overlapping AI-driven evaluation capabilities and a comparable early-to-mid stage scale.

Broad incumbents

• Mettl (Mercer Mettl): Online assessment and proctoring platform owned by Mercer, offering a broad suite of pre-hire and psychometric assessments. Comparable to WorkProbe in employer B2B assessment GTM, but as a much larger incumbent with deep enterprise relationships and a wider product portfolio.
• Eightfold AI: Talent intelligence platform applying AI across the hiring and employee development lifecycle, used by large enterprises. Broad incumbent in AI-driven talent assessment, overlapping with WorkProbe's AI-era hiring positioning but at vastly greater scale and scope.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks6 records

Key highlights5 records

Customer concentration

• LinkedInlinkedin.com/company/oppi-ai
• Facebookfacebook.com/oppiAI

Compliance1 record

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 Oppi AI