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Eight free EU compliance tools. NIS2 applicability, AI Act risk and fines, DORA assessment, deadline tracker. Article-level citations, no signup.

The modern platform for creating, sharing, and collaborating on AI prompts. Advanced version control and real-time testing.

Website, pricing, platforms and company facts side by side.
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| Website | regdossier.eu | diffyn.com |
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| Platforms | — | |
| Company | 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


RegDossier is an independent publication covering EU regulatory compliance for mid-sized companies, built around eight free interactive tools. The NIS2 Applicability Checker answers whether the directive covers your company and whether you fall in the essential or important category. The AI Act...
No description of Diffyn yet.
What each product offers, as listed by its team.


An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
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The Ultimate Prompt Tool for Creators – Visualize & Organize with Diffyn
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing RegDossier.eu and Diffyn.
RegDossier.eu's answer
Every calculation carries a citation to the specific Article it comes from. A compliance officer can open the tool, read the result, and check the maths against EUR-Lex without taking our word for it. Where penalties vary by member state, as they do under NIS2 and DORA, the tools say so instead of showing a single EU-wide number that does not exist.
Diffyn's answer:
Addresses workflow and change management on LLM prompts, provide teams with traceability and visualization of tests across multiple models, provide deeper understading into efficiency of these prompts.
RegDossier.eu's answer
Most tools in this space are lead magnets. They ask for an email, produce a generic score, and route the result to a sales team. These are free, need no signup, store nothing, and end with a link to a fortnightly newsletter rather than a call with an account executive. They also answer the question people actually have, which is whether a regulation applies to them at all, before the question of how to comply.
Diffyn's answer:
Diffyn is the platform that specializes on both change management and multi-model analysis.
RegDossier.eu's answer
Plain HTML, CSS and JavaScript, no framework and no third-party scripts.
Diffyn's answer:
React, Next.js, POSTGRESQL
RegDossier.eu's answer
Compliance officers, DPOs, risk managers and COOs at EU companies with roughly 50 to 1,000 employees. They are not lawyers. They usually cover several regulations at once with a small team or alone, and they need to know whether something is in scope before they need to know how to implement it. Smaller companies without a compliance function use the tools for the same reason, usually a founder or COO who has been handed the file.
Diffyn's answer:
Professionals incorporating LLMs or AI tools in their workflow and wants to keep track of changes and test their prompts.
RegDossier.eu's answer
RegDossier is a editorial project covering eight EU regulations. The tools came first because the questions readers were searching for, such as whether NIS2 applies to them or what the AI Act fines actually are, were being answered with 3,000-word articles when a two-minute checker does the job better. The rule from the start was that no number goes into a tool unless it can be traced to an Article in the Official Journal text.
Diffyn's answer:
I started working on Diffyn when I notice that prompting has become an essential part of work across many industries. While there are version control platofrms like github, they are not designed for just prompt management are can be overkill such applications, it is also not integrated natively with various LLMs and relevant tools for users to validate ideas and visualise results properly.
RegDossier.eu's answer
The tools are free and anonymous, with no accounts and no tracking, so we do not know who uses them. RegDossier is an editorial publication rather than a vendor.
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