Heroku alternatives for monorepos and multi-service apps

Developers look for a Heroku alternative for different reasons: cost, the end of free tiers, or the friction of running several services. This guide focuses on the last one. If your repository contains an API, a frontend, a worker and a database, how well does each option handle that?

None of these is the “winner”. They make different trade-offs, so the useful question is which trade-off matches your project. Check each vendor’s current docs and pricing before deciding, because they change often.

What to look for in a multi-service host

Before comparing products, decide what matters to you:

1. One project, many services. Can the whole repo live together, or is each service a separate app?
2. Private networking and discovery. Can services find each other without public URLs?
3. Deploy order. Can the database come up before the API?
4. Shared secrets. Do you set a value once or per service?
5. Operations. Do you want zero servers to maintain, or are you happy to run one?

The options

Railway

A project holds multiple services, including databases, and monorepos are supported by pointing each service at a root directory. Strong developer experience and fast to start. You configure services in its dashboard or config files, and ordering between them is more manual.

Render

Offers web services, workers, cron jobs and managed databases, plus a blueprint file to define several services in one repo. A solid, conventional choice with a gentle learning curve.

Fly.io

Runs your containers close to users in many regions and rewards you if latency matters. Configuration is per app, so a multi-service monorepo is several apps that you wire together. More control, more to manage.

Coolify (self-hosted)

An open-source, self-hosted platform you run on your own server. Great if you want full control and the lowest recurring cost, with the trade-off that you maintain the server, upgrades and backups.

Prongo

Built around one idea: the monorepo is the unit of deployment. A single prongo.yaml declares every service, depends_on decides order, {{ service.url }} handles discovery, and secrets are set once. It supports Node.js, PHP, Go, C#, static sites and anything in a Docker image. It is young and in a free beta, so expect a smaller feature set than established platforms. See pricing for the current limits.

Quick comparison

	Multi-service in one project	Deploy order from config	Self-managed servers
Railway	Yes	Manual	No
Render	Yes (blueprints)	Limited	No
Fly.io	Several apps	Manual	No
Coolify	Yes	Limited	Yes, yours
Prongo	Yes, the repo is the unit	Yes (depends_on)	No

This table simplifies each product. Treat it as a starting point and confirm details in their docs.

How to choose

• You want the easiest managed experience for mixed apps: Railway or Render.
• You need many regions or fine control: Fly.io.
• You want to own the server and minimise cost: Coolify.
• Your repo is a tightly connected set of services and you want one file to describe it: Prongo.

Migrating from Heroku

Most apps move with little change. Translate your Procfile into services, your add-ons into database services, and your config vars into plain settings and secrets. Keep secrets out of git during the move, and set up migrations as a pre-deploy step so schema changes stay safe.