Micro SaaS are subscription-model products that solve specific problems for a specific niche audience. Micro SaaSes are usually build by 1 founder. And bootstrapping is done. Although it can be done alone, it can also be done in small teams. Teams of 2 or 5 people. There is a 2 person Micro SaaS team that I know now. Husband and wife travel the world. 🙂