@o2k Reviews 

30
TrustScore 4.5 out of 5

4.7

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Rated 5 out of 5 stars

I completed both the Beginner and Intermediary bundles of the O2K Ultimate Guide to Taxation and Regulation of Crypto Assets, and I genuinely learned a lot. If you're looking for a crypto tax course t... See more

Rated 5 out of 5 stars

This was a very informative and well-structured course on crypto assets taxation. The content was explained in a clear and accessible way, making it suitable for both beginners and those with some pri... See more

Company replied

Rated 5 out of 5 stars

I completed a legal internship at O2K and had a very positive experience. The team was welcoming, professional, and always willing to support me throughout my internship. During my time there,... See more

Company replied

Company details

  1. Tax Attorney
  2. Cryptocurrency Service
  3. Education Center
  4. Lawyer
  5. Tax Consultant
  6. Tax Preparation

Written by the company

@O2K is a tax and legal consulting firm established in 2020 in Amsterdam, specialized in crypto assets and their international taxation and regulation. We advise individuals, companies, institutions, and governments through one-on-one consulting and tailor-made training, covering crypto and traditional assets in cross-border contexts. Our services include international crypto tax and compliance, regulatory and legal advice, KYC & AML frameworks, company formation and structuring, crypto licensing in Europe, NFT valuation, and part-time Head of Tax / Legal roles. @O2K also developed the 10-lesson “Ultimate Guide to Taxation and Regulation of Crypto Assets”, the only course on the market addressing crypto from a fully international tax perspective.


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4.7

Excellent

TrustScore 4.5 out of 5

30 reviews

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4.7

All reviews

(30)

21 reviews in the last 12 months

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Rated 5 out of 5 stars

O2K makes crypto compliance and…

O2K makes crypto compliance and education clear and accessible. The courses break down complex topics—especially crypto asset taxation—into simple, practical explanations using plain legal language.
Whether you’re a tax professional, regulator, law enforcement agent, or an investor in Bitcoin, cryptocurrencies, NFTs, or other digital assets, O2K provides a strong starting point. The content is well structured, easy to follow, and avoids unnecessary technical or legal jargon, saving a significant amount of time.

January 6, 2026
Unprompted review
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Reply from @o2k

Thank you so much for the nice words, Hanene

Rated 5 out of 5 stars

Great help with a transaction

Thanks to @o2k I was able to perform a very important transaction in crypto.
I will not go into details, but, they were very professional and we (counterpart and me) feel protected for eventual problems who might occure.
Very happy with them and, not only professionaly but, I think I made some friends.

December 19, 2024
Unprompted review
Rated 5 out of 5 stars

The Beginners Level Course is well structured and well presented

I have taken the Beginners Level Course in Crypto Assets and How do we Tax them? The course is well structured and well presented.
This course gives you the learner the fundamental knowledge of cryptocurrencies and the different terminologies you need to know about cryptocurrencies.

I have learnt a lot studying this course and I encourage everyone to enroll on this course.

@O2K Consulting is the best place to learn everything about crypto assets and the different types of taxes applicable to Crypto Assets.

September 21, 2022
Unprompted review
Rated 5 out of 5 stars

I really enjoyed their beginners'…

I really enjoyed their beginners' course. It is an eye-opener. Banks are terrible with handling big transactions, while crypto assets give you the opportunity to exclude the middle man (the bank). It definitely is worth exploring!

August 1, 2022
Unprompted review

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