What Open Assessment Technologies does

Open Assessment Technologies S.A. (OAT), founded in 2013 and headquartered in Capellen, Luxembourg, develops and maintains TAO (Testing Assistant Online), an open-source digital assessment platform serving ministries of education, certification bodies, and educational institutions across 80+ countries. The platform is built natively on open standards—QTI 2.2 (Question and Test Interoperability) and LTI 1.3 (Learning Tools Interoperability)—and was the first to achieve IMS conformance certification for QTI in all four categories (Authoring, Delivery, Item/Test Bank, and QTI Content). The product architecture consists of core platform components (Authoring, Rostering & Delivery, Reporting, Cloud Services) layered with tiered commercial offerings: TAO Community Edition (free, open-source foundation), TAO Accelerate (turn-key pilot for up to 2,400 deliveries), TAO Ignite (scalable turn-key with account management), and TAO Enterprise (fully customized bespoke deployments). Next-generation modules include TAO Advance (delivery engine with proctoring), TAO Grader (technology-assisted human scoring), and TAO Insights (API-accessible datastore analytics). The firm also offers Computer Adaptive Testing (CAT) capability and localization in 30+ languages, with infrastructure operated on AWS and Google Cloud under ISO 27001, ISO/IEC 23988, GDPR, and WCAG 2.1 AA compliance.

The company operates a hybrid go-to-market combining community-led growth (free open-source downloads, developer community, knowledge base) with enterprise field sales targeting government and institutional buyers. Revenue is generated through annual tiered subscriptions (priced on volume and concurrency of tests, test-takers, and authors), managed cloud hosting services on AWS/GCP, and professional services for custom integration, implementation, and training. Named customers include the OECD PISA program, New York City Department of Education, French Ministry of Education, Japanese Ministry of Education (via partner Infosign), Lithuania's National Agency for Education, Italy's national assessments, the National Center and State Collaborative (US), and the Linux Foundation Training & Certification. Strategic partners include ACER (for PISA 2025), AWS, Google Cloud, IMS Global Learning Consortium, and the Luxembourg Institute of Science and Technology (LIST, joint trademark holder). The company employs 51-100 staff across Luxembourg, San Francisco, and Boston, is privately held, and discloses no venture funding rounds beyond a 2018 transaction involving ACT. Co-founders are Marc Oswald (CEO) and Patrick Plichart (VP Software Engineering); CTO Mark Molenaar chaired the IMS Global Executive Board on Assessment (2016-2017).

Name

Open Assessment Technologies

Legal name

Open Assessment Technologies S.A.

Website

https://taotesting.com

Company type

Private

Founded year

2013

Operating status

Operating

Headcount range

51–100 employees

Short description

Open Assessment Technologies (OAT) develops TAO, an open-source digital assessment platform built on QTI and LTI standards, serving ministries of education, certification bodies, and educational institutions across 80+ countries via tiered subscriptions and managed cloud services.

Ownership category

akta.pro rank

Product category

Digital Assessment Platform

NAICS

Educational Support Services (611710), Software Publishers (5132)

SIC

Services-Educational Services (8200)

akta.pro primary industry

Test Item Banks, Question Authoring & Assessment Design Tools (EDAFADAC)

akta.pro secondary industries

Assessment Interoperability, Integrations & Standards (QTI/LTI/OneRoster) (EDAFADAK), Open Assessments & Question Banks (OER-aligned) (EDAGAJAD), Assessment, Testing & Analytics Platforms (Formative/Summative) (EDAJAMAC)

Keywords

• Digital assessment platform
• Open source testing
• Online examination software
• Computer based testing
• Assessment authoring tools

Headquarters

HQ city

Capellen

HQ country

Luxembourg

HQ region

Europe

Offices3 records

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. Enterprise Software Subscriptions: Tiered subscription model with TAO Accelerate (turn-key pilot solution), TAO Ignite (scalable with account support), and TAO Enterprise (bespoke customized solution). Pricing based on annual volume and concurrency for tests, test-takers, and authors.
2. Cloud Hosting Services: TAO Cloud services for hosting assessment platforms - shared or private cloud options for Enterprise customers. Infrastructure operated on AWS and Google Cloud with commercial-grade security.
3. Professional Services: Custom integration support, implementation services, and training for enterprise deployments. Account management and dedicated support included in higher tiers.
4. Free Open Source Community Edition: TAO Community Edition provided free of charge to drive adoption, community growth, and future commercial conversion. No revenue directly generated but supports ecosystem development.

Pricing tiers

Go-to-market motion2 records

Distribution channels5 records

Marketing channels7 records

Core offering

Open Assessment Technologies (TAO) develops and sells an open-source digital assessment platform used by governments, educational institutions, and certification bodies to author, deliver, and report on computer-based tests at scale. The company offers a free Community Edition and commercial tiers (TAO Accelerate, Ignite, Enterprise) plus add-ons (TAO Advance, TAO Grader, TAO Insights), all built natively on the QTI and LTI open standards to enable interoperable, customizable, high-stakes assessment delivery.

Product overview

TAO is a modular digital assessment platform built on open source and open standards (QTI). The platform architecture consists of core platform components (Authoring, Rostering & Delivery, Reporting, Cloud Services) combined with a tiered product portfolio: TAO Community Edition (free open-source foundation), TAO Accelerate (turn-key pilot solution for up to 2,400 deliveries), TAO Ignite (commercial tier with scalability and support), and TAO Enterprise (fully customized bespoke solution). Next-generation capabilities include TAO Advance (test delivery engine with proctoring tools), TAO Grader (technology-assisted human scoring), and TAO Insights (API-accessible datastore analytics). The platform supports Computer Adaptive Testing and integrates with LMS systems via LTI 1.3.

Differentiator

Problem solved

Functional benefit

Brands

• TAO Community Edition: Free open-source digital assessment platform available for download and customization.
• TAO Accelerate
• TAO Ignite
• TAO Enterprise
• TAO Advance
• TAO Grader
• TAO Insights

Products and services

• TAO Community Edition Free open-source digital assessment platform built on open standards (QTI), providing full control over assessment authoring, delivery, integration, and customization without vendor lock-in. Available via GitHub download and container installation for self-hosting.
• TAO Accelerate

Quantifiable outcome

• Scale to 200,000+ concurrent users for high-stakes assessments
• +2 more outcomes

Named customers8 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

Yes

API docs

API detail

Core technology

AI maturity

App detail

Integration3 records

AI capability2 records

Feature7 records

Partnerships

Six partnerships are on record, tiered flagship, core and regional.

• ACER (Australian Council for Educational Research)flagshipStrategic or Co-development PartnerPartnership to develop a state-of-the-art assessment platform for OECD PISA 2025. Major international collaboration for large-scale educational assessment.
• Google CloudcoreTechnology or IntegrationCloud infrastructure provider for TAO Cloud services. TAO is a Google Cloud certified partner. Infrastructure operates on commercial-grade GCP with highly restricted access.
• Amazon Web Services (AWS)coreTechnology or IntegrationCloud infrastructure provider for TAO Cloud services. TAO leverages AWS for scalable, secure cloud-based assessment delivery.
• InfosignregionalChannel Partner/ Reseller/ DistributorRegional partner in Japan enabling flexible, cost-effective online testing solutions for standardizing assessment in schools nationwide. Partnership enables Ministry of Education adoption.
• IMS Global Learning ConsortiumcoreStrategic or Co-development PartnerStandards body developing QTI and LTI specifications. TAO participates in plugfests, technical working groups, and was first to achieve conformance certification. CTO Mark Molenaar chaired IMS Global Executive Board on Assessment (2016-2017).
• Luxembourg Institute of Science and Technology (LIST)coreStrategic or Co-development PartnerCo-owner of TAO Trademarks and research partner in open source assessment development. Joint IP ownership on trademarks.

Scale indicators4 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Questionmark: Enterprise assessment platform for certification, compliance, and higher-education testing. Directly comparable to TAO Ignite/Enterprise as a turn-key authoring and delivery solution serving similar institutional buyers.
• ExamSoft: Assessment and analytics platform primarily used by law schools, medical schools, and certification programs. Comparable to TAO in serving high-stakes credentialing with secure offline/online delivery and item banking.
• Learnosity: Assessment authoring and analytics toolkit, also a QTI-aligned provider, now encompassing Questionmark. Directly comparable as a standards-based assessment engine sold to publishers, ministries, and EdTech platforms.
• Respondus: Lockdown browser and assessment authoring tools for LMS environments (Canvas, Blackboard, Moodle). Comparable to TAO as an assessment layer used by higher-ed institutions within their learning platforms.
• Kryterion (Webassessor): Cloud-based certification and high-stakes testing platform with proctoring. Comparable to TAO Enterprise for certification bodies and professional credentialing programs.

Broad incumbents

• Pearson VUE: Global leader in high-stakes computer-based testing, owned by Pearson. Comparable as a broad incumbent serving the same ministries, certification bodies, and certification programs but with deeper content libraries and test-center network.
• Educational Testing Service (ETS): Nonprofit that designs and administers large-scale assessments (TOEFL, GRE, K-12). Comparable as a broad incumbent competing for national and international assessment programs that TAO also targets.
• Prometric: Global test delivery and certification services provider with an extensive test-center network. Comparable as a broad incumbent offering both technology and physical delivery of high-stakes exams.
• Instructure (Canvas): Major LMS provider (Canvas) that bundles basic assessment capabilities. Comparable as a broad incumbent whose built-in assessment competes with TAO for K-12 and higher-ed budgets while also serving as a deployment channel via LTI integration.

Emerging players

• Mettl (Mercer Mettl): Online assessment platform focused on skills, psychometric, and certification testing, now part of Mercer. Comparable as an emerging player overlapping with TAO in corporate certification and higher-education assessment.

Market position

Strengths5 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/TAOTesting
• YouTubeyoutu.be/ETXEgBRitbQ
• Facebookfacebook.com/TAOTestingSolutions
• LinkedInlinkedin.com/company/open-assessment-technologies-s-a-
• Instagraminstagram.com/taotesting

Compliance8 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles3 records

Subsidiaries1 record

Funding overview

Funding rounds1 record

Investors1 record

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 Open Assessment Technologies