No, I don't, but I think they're often riskier than a similar sized startup targeting broader B2B customers. The reason for that is that the charging model is often month-to-month or short term contracts (yearly renewal), the products are often something you can do without or can switch to a competitor easily (i.e. there's not much differentiation). It can be very easy for a competitor to come about and knock you off a peg very quickly. In addition, the 'nice to have' dev focused startups are things that can be easily cancelled with not that much of an effect on the bottom line of another business. Many dev-focused startups have their business with other startups primarily, so where there's a recession that might knock some of those out of business it can be fatal to your company if you're reliant on them for revenue.