Sramana Mitra suggests Software-as-a-service vendors are the most recession-proof in a event of the recession in this Forbes article.

In the context of large Indian IT service providers, this is significant. Even in non-recessionary times, SaaS is an opportunity to break the linearity between employee and revenue growth. Such non-linearity strategies are much-talked internally and to an extent externally too. However, result-oriented outcomes are yet to make significant contributions to revenues.