We test independently — and make quality visible.
We test independently — and make quality visible.
Our Approach
The Deutsches Test Institut (DTI) is an independent, private testing institute. We evaluate products against clear, predefined criteria and publish transparent documentation. Our goal isn’t to create an artificial market advantage, but to level the playing field for quality-driven manufacturers — companies that invest in genuine product development and dependable service.
Verified quality
More trust
CO₂ offset
We test across
all industries.
Our standardized questionnaire ensures objective comparability. Transparent documentation makes product quality easy to understand and measurably increases customer trust.
Leading German brands trust our testing process
How do we test?
In our product tests, we assess items under real everyday conditions. Precise instrument measurements are combined with systematically documented user observations. This delivers authentic, robust results – rather than sterile lab data – and provides a reliable basis for transparent recommendations and safe purchasing decisions.
Deutsches Test Institut
variants
for testing
Note
test
Our Expertise
Our independent tests set clear benchmarks – for consumers and businesses alike. Every tested product and every certified service is a step toward greater transparency and trust. We are committed to upholding the highest standards and providing reliable guidance for all market participants.
Verified quality
Excellent service
Consumer protection
Clarity at purchase
The Deutsches Test Institut assesses products and services under the DTI Test Protocol. Results are freely accessible and can be verified via license number/QR code. Criteria and weightings are openly documented – making it clear at a glance which products stand out.
Tested separately.
Clearly certified.
With the dual DTI seals for product and service quality, you demonstrate the verified quality of both your products and your service processes. Awarded under the DTI Test Protocol, this twin certification makes excellence visible at a glance – and measurably strengthens customer trust.
Your benchmark for verified quality
Reliable quality.
Transparently tested & certified.
We test and publish products and services using a unified, practice-oriented protocol. This creates transparency and helps make quality comparable across industries.
Product and service quality are assessed separately and recognized with legally compliant, licensed quality seals. The designation “Independently tested” or “Tested on behalf” is shown clearly – in both cases under the same protocol and without influence.
Products are tested against clearly defined criteria and documented – from performance and safety to labeling.
Service quality is assessed separately (e.g., availability, response time, issue-resolution capability). The assessment follows a uniform methodology.
Seals for product and service are verifiable online. This makes verified quality visible on the product, on your website and in communications.
Every test leaves
a positive footprint
Our mission
Working together for a sustainable future. For every published result, we arrange for a tree to be planted via Tree-Nation. Each plant is documented and can be traced via a certificate and tracking link.
1 test = 1 tree
directly upon publication
Certificate & Tracking
on the Result page linked
trees planted
Total reforestation
Total absorbed CO²
Financed worldwide
Latest test results
Find specific results via the license search or by scanning the QR code.
