Doing data science work should be easy, enjoyable, and collaborative. That’s why we’re building a collaboration product for data professionals and data-fluent teams.

When we started DataCamp, we wanted to make it easy, enjoyable, and affordable for everyone to learn data science online. Today, we’ve reached over 7 million learners and actively helped increase the data fluency of more than 1,600 organizations. Over 150,000 subscribers have access to DataCamp today and even more for free through DataCamp Donates and DataCamp For The Classroom. However, almost all of them face significant struggles as they start actually doing data work.

The struggle of data professionals and data teams — and why it matters

Just like learning data science, doing data science work should be easy…


Measuring the world in 3D. One drone flight at a time

In this post, I want to share why I’m incredibly excited to be able to invest in inflights started by Hugo De Blauwe, using the framework described in Mental models for Angel investing.

Inflights delivers insights from drone flights to their clients all over Europe. The platform matches professional drone pilots with assignments from clients while automating and enhancing various parts of the process. In their words: “Measuring the world in 3D. One drone flight at a time”. inflights is becoming to professional drone pilots what Uber/Lyft has become to drivers. This market segment is large and growing fast. …


A modern, tech-enabled concierge service for orthodontics that takes a care-centered approach to clear aligners.

In this post, I want to share why I’m incredibly excited to invest in Two Front started by doctor Ingrid Murra, using the framework described in my post on Mental models for Angel investing.

Two Front is a modern concierge service for orthodontics that takes a care-centered approach to clear aligners. It’s a new way for kids and their families to achieve the smile they’re looking for — one that empowers orthodontists to use clear aligners over braces to treat kids while making parents’ lives easier by going to their homes.

Let me explain why you should care.

82% of…


In this post, I want to share why I’m incredibly excited to invest in Clever Girl Finance (CGF), using the framework described in my post on Mental models for Angel investing.

Clever Girl Finance, started by Bola Sokunbi, is one of the largest personal finance platforms for women in the US (see numbers above). The focus is on empowering a community of women to pursue and achieve financial wellness so that they can live life on their own terms. Now more than ever, women are focused on prioritizing their financial independence, security and well-being. Clever Girl Finance offers online courses…


Revolutionizing fitness through machine learning and computer vision

In this post, I want to share why I’m stoked to invest in Perch.fit, using the framework described in my post on Mental models for Angel investing.

Technology is reshaping the fitness space: think wearables, Peloton, Mirror, etc. In the US alone, 11M people go running regularly, and 93% of them use technology to help them train. In contrast, while 12M Americans do strength and training regularly almost no one uses technology to train right now.

Enter Perch.fit.

By monitoring your movements during exercise and leveraging machine learning and computer vision, Perch.fit enhances the athlete’s motivation, safety, and effectiveness of…


As a starting angel investor, I wanted to share a few key mental models and questions I use to evaluate potential investments. I’ve listed some of the key things I think about in order of importance below. My plan is to write about new angel investments using the framework below. Hope this will help keep me honest and that it’s useful for founders who are raising angel rounds!

1 Founder-Market Fit

To assess founder-market fit, ask the question: Is this founder or founding team a great fit for this particular market? Founder market fit can manifest itself in 3 areas…


The goal of this post is to shed some light on one of the most important economic terms in the negotiation between a startup founder and their investor: liquidation preferences. The implications of this key term seem often not well understood, while it can have a real impact on how much startup shares and (early) employee options are really worth.

Raising outside capital is a key way for entrepreneurs to finance the growth of their business. Investors are offered shares in the company in exchange for $$ at a certain valuation. Simple, right?

Right. Well.. additionally, investors typically negotiate: (1)…


As of March 2020, online education is on fire across the board with engagement up 100%+ for many platforms. Engagement is up because more people are learning as well as existing students spend more time doing so. Furthermore, many platforms are offering discounts or free access for certain groups or a certain time period further lowering the barrier to education and increasing the inflow of students. The fact that we’re learning more is one of the silver linings in this pandemic.

More learning and more students
On a learning platform like DataCamp, engagement for existing students is up more than…


At DataCamp, our overall mission is to build data fluency for individuals and companies, which we accomplish through the smartest data science education platform that exists. But why did we build all of this in the first place?

Opportunity in the Market

Data helps companies and individuals make better decisions. It also helps businesses produce new and better products. Because of the power of data, we feel that the impact of data science over the next 20 years will be equal in magnitude to what we’ve witnessed with software engineering over the previous 20 years.

However, companies are having a…


Mistakes are inevitable as a first-time founder and CEO; they were for me, at least. Though they can’t be avoided entirely, the important thing is to learn from them and minimize mistakes in the future.

One of the most effective ways to do this is to consume great resources — like books. This post is all about my favorite books that helped me in my journey through the world of business and that I think can be useful for other founders. These books are accessible for beginners but also have plenty to teach to experienced CEOs as well.

“The Hard…

Jonathan Cornelissen

Co-founder @DataCamp— Entrepreneur and Angel investor — jonathancornelissen.com interested in data science, python, rstats, education, entrepreneurship, ...

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