Coolify vs CapRover vs Railway Self‑Hosted: Feature Comparison, Performance Benchmarks, and Cost Analysis on a $5 VPS

Introduction#

Running a Platform‑as‑a‑Service (PaaS) on a cheap VPS is a tempting proposition for indie developers, hobbyists, or anyone who wants to spin up web apps without paying for a managed service. The market now offers three popular self‑hosted options that promise “Heroku‑like” experience on your own hardware:

All three run on Docker, expose a web UI, and can pull code from GitHub, GitLab, or Bitbucket. But how do they really behave on a $5 VPS (1 vCPU, 1 GB RAM, 25 GB SSD, 1 TB transfer)? This post walks through the feature set, runs a simple benchmark, checks security defaults, and finally breaks down the monthly cost.

TL;DR – On a $5 VPS CapRover wins on raw speed, Coolify offers the richest UI and built‑in CI, while Railway gives the most opinionated deployment pipeline. All three fit comfortably under the resource ceiling, but you’ll pay extra for backups and SSL certificates if you want production‑grade reliability.

Quick Feature Snapshot#

The matrix shows that none of the platforms are outright “wrong” for a $5 box; the choice boils down to workflow preference and how much UI polish you need.

Setting Up the Test Environment#

All three platforms were installed on a fresh Ubuntu 22.04 VPS (t2.micro-like specs). The steps below are trimmed for brevity; each platform’s official docs provide exhaustive instructions.

1. Prerequisites#

# Update & install Docker + Docker‑compose
sudo apt update && sudo apt upgrade -y
sudo apt install -y ca-certificates curl gnupg lsb-release
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] \
https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" | \
sudo tee /etc/apt/sources.list.d/docker.list > /dev/null
sudo apt update && sudo apt install -y docker-ce docker-ce-cli containerd.io docker-compose-plugin
sudo usermod -aG docker $USER
newgrp docker

2. Installing Coolify#

# One‑liner from docs
curl -fsSL https://cdn.coolify.io/install.sh | bash
# After install, open http://your-vps-ip:3000 and create admin user.

3. Installing CapRover#

curl -fsSL https://get.caprover.dev | bash
# Follow the on‑screen prompts; UI runs on port 3000 as well.

4. Installing Railway (self‑hosted)#

Railway ships as a Docker Compose stack.

# railway-compose.yml
version: "3.8"
services:
  railway:
    image: railwayplatform/railway:latest
    restart: unless-stopped
    ports:
      - "3000:3000"
    environment:
      - RAILWAY_DB_URL=postgres://railway:railway@db/railway
    depends_on:
      - db
  db:
    image: postgres:15
    restart: unless-stopped
    environment:
      POSTGRES_USER: railway
      POSTGRES_PASSWORD: railway
      POSTGRES_DB: railway
    volumes:
      - pgdata:/var/lib/postgresql/data
volumes:
  pgdata:

docker compose -f railway-compose.yml up -d

All three UIs are reachable at http://<VPS_IP>:3000. The next step is to deploy an identical Node.js “Hello World” app to each platform and time the process.

Benchmark: Deploying a Simple Node App#

The test app#

// index.js
const express = require('express');
const app = express();
app.get('/', (req, res) => res.send('👋 Hello from ${
  process.env.PLATFORM || "unknown"}!'));
app.listen(3000, () => console.log('Listening on 3000'));

Dockerfile (same for all):

FROM node:18-alpine
WORKDIR /app
COPY package*.json ./
RUN npm ci --only=production
COPY . .
EXPOSE 3000
CMD ["node", "index.js"]

package.json:

{
  "name": "benchmark-app",
  "version": "1.0.0",
  "main": "index.js",
  "scripts": {"start": "node index.js"},
  "dependencies": {"express": "^4.18.2"}
}

The repo is pushed to a private GitHub repo ([email protected]:example/benchmark-app.git).

Deployment steps & timing#

All measurements were taken with time on the VPS, averaged over three runs. CapRover’s Go‑based UI and leaner Docker image give it the fastest spin‑up. Coolify’s extra CI pipeline adds a few seconds on the first run but pays off when you need to run tests. Railway’s extra orchestration layer (preview environments) adds a modest overhead.

Resource usage at idle#

All stay well under the 1 GB RAM limit, but you’ll feel the pressure if you start multiple apps simultaneously.

Security Checklist#

Self‑hosting a PaaS means you inherit the security responsibilities of Docker, the underlying OS, and the platform itself.

Recommendations for a $5 VPS

1. Switch Docker to rootless mode – reduces impact if a container escapes.
2. Lock down SSH (key‑only auth, change default port).
3. Enable automatic security updates (unattended-upgrades).
4. Back up the Docker volumes (especially the DB for Railway) to an external S3 bucket; otherwise a single disk failure wipes your PaaS config.

Cost Breakdown – Running on a $5 VPS#

Hidden costs#

• CPU spikes – Deploying many containers at once can push the single vCPU to 100 %, causing temporary throttling. Consider a $10 plan if you need parallel builds.
• Support – Community forums are free, but paid support (e.g., for CapRover’s enterprise edition) starts at $30/month – not needed for hobby use.
• Monitoring – Adding Grafana/Prometheus on top of the platform adds ~50 MB RAM; still within limits but may affect app performance.

Practical Checklist: “Can I run X on a $5 box?”#

• VPS meets minimum specs (1 vCPU, 1 GB RAM, 25 GB SSD).
• Docker rootless mode enabled (dockerd-rootless-setuptool.sh install).
• Platform UI reachable on port 3000 and secured behind a firewall (ufw allow 3000/tcp).
• Domain configured (A record → VPS IP).
• SSL certificate issued via platform UI.
• Backup script scheduled (e.g., docker run --rm -v coolify-data:/data -v $(pwd):/backup alpine tar czf /backup/coolify-$(date +%F).tar.gz /data).
• Monitoring alerts (optional): set up a cron that docker stats --no-stream > threshold triggers a Slack webhook.

If you tick all the boxes, you have a production‑grade self‑hosted PaaS for under $6/month.

FAQ#

1. Which platform has the best documentation?
CapRover boasts the most extensive community‑driven docs and a vibrant Discord. Coolify’s docs are solid but still catching up. Railway’s self‑hosted docs are sparse; you’ll rely on the open‑source repo readme.

2. Can I run multiple apps simultaneously?
Yes. All three use Docker, so you can launch as many containers as RAM allows. On a $5 VPS you’ll comfortably run 2‑3 small Node apps; a fourth may cause swapping.

3. Do I need to purchase a commercial license for any of them?
No. Coolify and CapRover are MIT‑licensed; Railway is AGPL‑3.0, which requires you to share modifications if you distribute the software, but internal use is fine.

4. How do I migrate an app from one platform to another?
Export the Docker image (docker save) and import it on the target platform, or simply point the new platform at the same Git repo and let it rebuild the Dockerfile. Environment variables must be recreated manually.

5. Is there a way to add CI pipelines without external services?
Coolify includes a built‑in pipeline editor (GitHub Actions‑like). CapRover expects you to use external CI (GitHub Actions, GitLab CI). Railway’s UI also offers “Deploy Preview” pipelines, but they are tied to the Railway CLI.

Conclusion#

If you value a sleek UI and built‑in CI, Coolify feels like a lightweight Heroku you can actually afford. CapRover wins on raw speed and minimal resource use, making it the pragmatic choice for a $5 VPS that will host several micro‑services. Railway’s self‑hosted variant shines when you love its “preview environments” workflow, but it carries a slightly larger memory footprint.

All three platforms can comfortably run on a $5 VPS, provided you lock down Docker, schedule regular backups, and keep an eye on CPU spikes. The final decision comes down to your workflow: UI polish vs. performance vs. pipeline opinionation.

Tip: Whichever platform you pick, start with a fresh VPS, enable rootless Docker, and set up automated backups. You’ll thank yourself when the VPS provider decides to reboot for maintenance.

Happy self‑hosting, and may your deployments be swift and your costs stay low. For more deep‑dive articles on low‑budget cloud ops, check out mahbuburriad.com.