The space is too complex to do a chart, as a bunch of details are not directly comparable.
Many people who choose Flynn are not directly comparing us to hosted platforms, as they want more control over their infrastructure (where they run it, lock-in avoidance, etc).
As far as individual features go, we are closest to Heroku (and maintain buildpack/runtime compatibility). However there are differences including our support for other databases (MySQL and MongoDB in addition to Postgres and Redis) and many other smaller things like HTTP/2 support.
Many people who choose Flynn are not directly comparing us to hosted platforms, as they want more control over their infrastructure (where they run it, lock-in avoidance, etc).
As far as individual features go, we are closest to Heroku (and maintain buildpack/runtime compatibility). However there are differences including our support for other databases (MySQL and MongoDB in addition to Postgres and Redis) and many other smaller things like HTTP/2 support.