Coolify vs Vercel: Real Cost & Performance Comparison for Solo Developers

I run 10+ production Next.js sites solo. Here's the real cost comparison between Coolify (self-hosted on Hetzner) and Vercel — with actual numbers from my setup.

My Setup#

I currently host all of these on a single Hetzner CPX42:

• massagego.co
• medipanion.com
• seoulhomes.kr (+ mrvisakorea.com, seoultranslate.com, etc.)
• wonsukchoi.co
• onlinemedicaltools.com
• islandseeker.co (guamtravel)
• teoraspace.com
• lookseehealth.com
• expertsapiens.com (+ studio.expertsapiens.com)

Server spec: 8 vCPU, 16 GB RAM, 320 GB NVMe — $29.99/mo

Plus a 60 GB volume for Docker data: $3.00/mo

Total: $32.99/mo for unlimited sites.

The Cost Comparison#

Let's run the numbers for 10 production sites:

Item	Vercel	Coolify + Hetzner
Platform fee	$20/mo (Pro)	$0 (open source)
Per-site fee	~$20/mo × 10 sites	$0
Server	N/A	$29.99/mo (CPX42)
Storage	N/A	$3.00/mo (60GB volume)
SSL	Free (auto)	Free (Let's Encrypt via Coolify)
Total	~$220/mo	$32.99/mo

That's $187/mo saved — $2,244/yr.

And the real kicker: I can add unlimited additional sites for zero extra cost. On Vercel, each additional Pro site is another ~$20/mo.

Performance#

The common question: "Does self-hosting hurt performance?"

Here's what I've observed after running both setups:

Metric	Vercel	Coolify (CPX42)
Build time	1-3 min	2-5 min
SSR response time	~50ms	~50-80ms
Cold starts	~200ms	None (always-on)
Background jobs	Edge functions only	Cron, workers, anything
Database	External only	Co-located on same server

Builds are slower on Coolify — about 2x. But that's a background process you don't wait for anyway.

Cold starts don't exist — your Docker containers are always running. No Lambda-style cold start penalty.

Response times are comparable — the CPX42 handles SSR pages just fine. For a solo dev site getting thousands of monthly visitors, you won't notice the difference.

What You Actually Get#

Coolify Advantages#

• Unlimited sites for the same $32.99/mo
• Full control — SSH into the server, run any software, install any package
• Background jobs — cron, API workers, Supabase DB sync, all on the same box
• Docker — run any container alongside your sites (Umami analytics, PostgreSQL, Redis)
• No vendor lock — your sites run in Docker containers, portable anywhere
• Same deployment experience — push to GitHub, Coolify auto-deploys

Vercel Advantages#

• Zero config — connect repo, it just works
• Preview deployments — every PR gets a URL
• Edge functions — run code at the edge, globally
• Analytics — built-in, no extra setup
• Team workflow — better for teams with multiple contributors

The Verdict#

For solo developers running multiple sites, Coolify + Hetzner is the clear winner.

The savings compound with every additional site. The $2,244/yr saved is real money that goes back into your business.

The only real trade-off is the initial setup time — about 1-2 hours to configure Coolify, set up the server, and deploy your first site. After that, it's zero maintenance. My Coolify instance has been running for months without any issues.

When to choose Vercel: You have one site, you're in a team, or you value zero-config over cost savings.

When to choose Coolify: You run multiple sites, you want full control, and you keep the $2,244/yr.

Running Coolify v4.0.0 on Hetzner CPX42, 10+ production sites, 0 downtime.