[azmarks]

We did a similar thing. Started all in on Heroku and then slowly moved database, redis, MQ and CICD off to dedicated providers over a 4 year period. Then we spent several months creating an architecture in a different cloud provider that we felt would be our next step in evolution and finally migrated our servers off Heroku.

I'm still a fan of Heroku and would highly recommend it to a brand new startup. But, after awhile, you start realizing the limitations of Heroku and you need to move on. The fact that your startup is still around and growing enough that you need to migrate off Heroku should be seen as a sign of success