I haven’t tried Fly.io, but I have deployed a small application to Render and found it very easy. I’m simply using this small shell script to build the application and I’m using their Postgres offering with no problems:

#!/usr/bin/env bash
set -o errexit

# Install dependencies
mix deps.get --only prod

# Compile assets
MIX_ENV=prod mix compile
MIX_ENV=prod mix assets.deploy

# Create release
MIX_ENV=prod mix release --overwrite

Render - much easier to setup, can deploy via git push, more expensive
Fly.io - setup process is buggier and frustrating, have to manually deploy new changes, but much cheaper + works well with Phoenix LiveView

I normally use Fly.io, but I switched to Render because I could not get flyctl to deploy my app at all. Overall, both are pretty good once your app is running in prod.

For transparency, I work at Render.

Thanks to @theodore and @jakobsen for sharing your experience with Render!

We do deploy from a git repo (github, gitlab, bitbucket), and we also have a few infrastructure-as-code options, such as our blueprints, and recently open sourced a Terraform provider as well.

I’m pretty new to Elixir, but if there’s anything I can help with about the platform, let me know!