Permit.io is a Fullstack permissions service enabling developers to bake in permissions and access control into their products within minutes, targeting dozens of companies of various sizes and already looking at a few $100K in ARR.

Ora PM is a project management system that generates an average monthly revenue of $21k, and is designed for use by individuals as well as companies with big projects.

EspoCRM, an open-source CRM application for small and mid-size businesses, has seen an average of over 16,000 downloads per year and makes up to $30k per month, offering efficient tools to systematize customer data, improve sales cycles, and automate routine administrative tasks.

Statful, a monitoring platform to track any type of metric, managed to get six customers and reach an MRR of approximately $10,000 without any real investments in marketing and sales.

How Balsamiq became a $550k/month company through staying focused on simplicity and taking care of their team and community.