The Transparency Register lists interest representatives who seek to influence EU policy and decision-making. It is operated jointly by the European Parliament, the Council of the European Union and the European Commission under a 2021 interinstitutional agreement, and registrants publish a profile of their lobbying and advocacy activity.
Domain Rating is a dated Ahrefs snapshot of domain authority. PetroHrys Score is an independent editorial assessment of the directory’s practical business value. They are separate measurements and are never combined. Domain Rating values are dated historical Ahrefs snapshots. Domain Rating is a dated historical measurement of the shared domain, not an assessment of this individual registry page. New measurements are not collected because the Research Center does not depend on mandatory authenticated APIs. Where several registries are published on one measured domain they repeat that domain’s single dated snapshot rather than each carrying a figure of its own. Domain Rating is a third-party metric produced by their respective providers, not by PetroHrys.com. Each recorded value carries its provider and the date it was measured, and describes the domain that was measured rather than one page on it. No source has been consulted for authority score, estimated traffic and referring domains, so they are not published for any record.
Open The register’s public pages and its search entry point were retrieved anonymously with no credential and no fee. The result application itself is client-rendered and was not exercised, so nothing is asserted about result formatting, export or any CAPTCHA on that surface.
It is operated jointly by the three main EU institutions rather than by one of them, which is what gives it reach across the institutions.
Registration is backed by conditionality: certain activities in dealings with the institutions are made conditional on being registered, so the incentive to appear is real.
The register can remove an organisation for up to two years where the code of conduct is breached, so entries carry a sanction behind them.
Limitations
Entries are self-declared. Registration does not verify that what an organisation says about its activities, funding or clients is accurate.
It is not a permission system: being listed is not approval by any EU institution, and absence does not prove an organisation does no advocacy.
The search runs as a client-rendered application that was not exercised, so its behaviour and any export limits were not observed.
Submission guidance
Records are created through incorporation, registration, filing, or statutory processes.
Submission difficulty
Unknown
Typical listing quality
High
Typical approval time
Unknown
Review process
Unknown
Best for
Checking whether an organisation lobbying EU institutions is registered, and reading what it declares about its activity and clients.
Understanding which interests are represented on a given EU policy file before relying on a submission or position paper.
Not recommended for
Treating registration as accreditation, approval or endorsement by the EU institutions. It is neither, and the register does not vet the truth of a declaration.
Company verification. It records interest representatives and what they declare, not corporate existence or standing.
Preparation checklist
No checklist recorded yet.
Common mistakes
No common mistakes recorded yet.
Establishing required submission assets requires submitting a listing and observing the result. That has not been done for any directory in this dataset, so it is not published rather than estimated.
What this directory accepts
Startups
Unknown
SaaS products
Unknown
Enterprises
Yes
Agencies
Yes
Freelancers
Unknown
Local businesses
Unknown
Developer tools
Unknown
Open-source projects
Unknown
Non-profits
Yes
AI products
Unknown
Mobile apps
Unknown
Ecommerce stores
Unknown
Recommended industries
Organisations engaging with EU institutions
How the PetroHrys Score was reached
Editorial trust 15%
10 / 10How far the entries a directory publishes can be relied on as accurate.
Business usefulness 15%
8 / 10How much practical use a listing there is to the business being listed.
Verification quality 12%
8 / 10How thoroughly the directory establishes that an entry is genuine before publishing it.
Platform reputation 10%
9 / 10How the platform is regarded in its field. Deliberately not a popularity, traffic or recognition measure.
Spam resistance 10%
9 / 10How well the directory keeps low-quality and promotional entries out.
Industry importance 10%
9 / 10How central the directory is to its sector, independently of how useful one listing is.
Long-term stability 10%
9 / 10How likely the directory is to still exist, and to still carry the entry, years from now.
Submission quality 8%
7 / 10What the submission process asks for and how workable it is for the business submitting.
Transparency 5%
10 / 10How openly the directory states its rules, costs and criteria.
Moderation quality 5%
8 / 10How the directory maintains entries after publication.
The PetroHrys Score is a first-party editorial assessment, not a third-party
authority metric. It is the weighted sum of the ten factors above, divided by ten, so the number
on this page is reproducible from the values shown. Each factor is scored from 0 to 10 by a human reviewer and weighted as shown. The definitions describe what was weighed, not a rubric: no threshold or formula maps a directory onto a value, and two reviewers could reach different numbers. The score is reproducible from the factors shown on every record, but it is an editorial judgement, not a measurement.