One of the things that made MySQL successful was its use of open source technology to disrupt the multi-billion dollar database market.  In Silicon Valley, people often talk about disruption, but usually what they mean is they have some new feature or a new way to do things that is 10x faster or 10x cheaper.  Those are good things, but that's not necessarily sufficient to make a business truly disruptive.  

The classic disruption model as defined by Clayton Christensen comes down to 4 important factors:

1. There's a proven market with large incumbents
   This demonstrates that customers are willing to pay money to solve this problem
   
   
2. There are underserved customers whose needs are not being met by the incumbents
   They may be receptive to a "good enough" product that is easy to access
   
   
3. The incumbents cannot profitably meet the needs of this market
   Ideally, their entry into this market would hurt their core business 
   
   
4. To disrupt market, you need to disrupt all the players, not just some of them
   If there are other players, you need to disrupt all of them

If you have all of those things, then your business could be disruptive.  But typically many startup companies ignore the third point.  It's not enough to do something the incumbents don't do today, you want to do something that they cannot do, because it would hurt their existing business.

In the case of MySQL, the product targeted the underserved web developer market.  MySQL was not only a better fit technically in that area, but due to its open source model, it was a business that was unattractive to the incumbents. (Or it was, until it grew to beyond $100 million in revenue.  Now Oracle will leverage this force to compete against Microsoft SQL Server.)  

There are plenty of great businesses out there that are not disruptive; perhaps you're creating a new market, or you're introducing a new innovation that the incumbents have not discovered.  Disruption isn't the only strategy, but if you can make your business disruptive, you gain a significant advantage in the market place.

• Amazon: The Innovator's Solution

I attended a panel session at the South by Southwest Interactive conference recently on the topic of high-tech startups in Europe.  The panel included Marten Mickos (former CEO of MySQL, now at Eucalyptus), Resham Sohoni (CEO of Seedcamp), Peter Robinett (Bubble Foundry) and Felix Petersen (Nokia).  It was interesting to learn about some of the initiatives, like Seedcamp, which are investing in and promoting startup companies like Erply, and Codility coming out of eastern europe. These companies are small, but they have big ambition and are leveraging open source and cloud infrastructures to keep their costs low.

Here's some video from the panel...