Docker is an open platform for developing, shipping, and running applications using containerization technology.
PM2 is a production-ready process manager for Node.js applications that simplifies deployment, monitoring, and scaling. It provides a robust set of tools to keep your services alive, automatically restart on failures, and manage logs. Designed for developers and DevOps teams, PM2 works across Web, Windows, Mac, and Linux platforms, integrating seamlessly with Docker, Kubernetes, AWS, and Google Cloud. Its free, open-source nature makes it accessible for any project size.
Free for personal use and small businesses; paid plans start at $9/user/month.
- Industry-standard containerization technology
- Huge ecosystem and community
- Docker Compose simplifies local multi-service setups
- Consistent behavior across dev/staging/prod
- Free and open-source
- Simple CLI with powerful features
- Cross-platform support
- Rich ecosystem of integrations
- Resource usage can be heavy on Mac/Windows
- Licensing changes have affected some larger companies
- Learning curve for networking and volumes
- Primarily focused on Node.js; limited for other runtimes
- Advanced monitoring may require external tools
- CLI can become complex for large fleets
What reviewers say
Docker Reviews
4.3 (3)Works, with some caveats
Mixed feelings about Docker after using it for a while. On the plus side, industry-standard containerization technology. That said, learning curve for networking and volumes, which held us back from rating it higher.
Highly recommend Docker
Been a daily user of Docker for a while now. Huge ecosystem and community. No major complaints so far. Would recommend to anyone considering it.
Great tool for development
We've been using Docker for a few months now and it's genuinely made a difference for our team. Huge ecosystem and community. No major complaints so far. Would recommend to anyone considering it.
pm2 Reviews
No reviews yet.
More alternatives & similar tools
Alternatives to Docker
View all →
Alternatives to pm2
View all →No alternatives listed yet. Browse similar tools →
The Verdict
AI-generated from listing dataDocker is the safer default for general containerized deployments, offering broader ecosystem and cross‑language support; pm2 is a free, Node‑specific process manager that excels at lightweight Node.js service orchestration but lacks Docker’s universal runtime flexibility.
Key differences
- •Runtime scope: pm2 manages only Node.js processes; Docker containers any language or stack.
- •Deployment model: pm2 is self‑hosted CLI tool; Docker provides a desktop app and full container runtime.
- •Ecosystem breadth: Docker integrates with millions of images on Docker Hub and many orchestration tools, while pm2’s integrations focus on Node.js, Docker, Kubernetes, AWS, and Google Cloud.
- •Resource overhead: Docker can be heavy on Mac/Windows hosts; pm2 runs as lightweight background services.
- •Pricing: pm2 is completely free and open‑source; Docker’s advanced features require paid plans beyond free personal use.
Pricing & value
pm2 is fully free and open‑source; Docker’s paid plans start at $9/user/month for advanced features.
Ease of use / learning curve
Docker Compose simplifies multi‑service setups; pm2 CLI can become complex for large fleets.
Features & depth
Docker offers containerization, image registry, vulnerability scanning, and deep Kubernetes integration; pm2 focuses on Node.js process management.
Integrations & ecosystem
Docker has millions of images on Docker Hub and broad tool integrations; pm2’s key integrations are limited to Docker, Kubernetes, AWS, Google Cloud.
Collaboration
Docker’s shared images and Docker Hub facilitate team collaboration; pm2 lacks a central repository for sharing configurations.
Scalability
Docker scales from local dev to large production clusters via Kubernetes; pm2 scales Node.js apps but is limited to that runtime.
Support
Both provide community support (GitHub Issues, forums for pm2; Docs, community, priority support for Docker).
Choose Docker if…
Organizations requiring language‑agnostic containerization, image sharing, and robust orchestration across development and production environments.
Choose pm2 if…
Teams building exclusively Node.js services who need a free, lightweight process manager with built‑in clustering and logs.
Common questions
Is there any cost to use pm2 versus Docker?
pm2 is completely free and open‑source; Docker offers a free tier but charges $9/user/month for paid plans.
Can pm2 run non‑Node.js applications?
No, pm2 is primarily focused on managing Node.js processes; Docker can containerize any language or runtime.
Which tool provides better scaling for large production clusters?
Docker, with its deep Kubernetes integration and container orchestration, scales more broadly than pm2’s Node‑specific clustering.