Hi! Interesting point. At Apideck we're a happy (paying) Postman customer. We're not aware of any collaboration limits on the free tier. We created Portman with the intention to scratch our own itch by using OpenAPI as the canonical format to drive our API lifecycle and test automation.
Out of curiosity: are you also using is as a spec format? I.e. define the OpenAPI first, and then implement it (either manually or automatically) - as opposed as constructing it out of an exiting implementation.
