Render is awesome and offers among the best platform-as-a-service experience available today, at a lower cost than Heroku. That said, you're still locking yours

Render is awesome and offers among the best platform-as-a-service experience available today, at a lower cost than Heroku. That said, you're still locking yourself into a black box (just like with Heroku). Given the availability of tools like Coherence (www.withcoherence.com) that deliver a great developer experience in your own cloud, it makes sense to evaluate them alongside modern PaaS if you're migrating off Heroku today. (disclosure, I'm a cofounder of Coherence).