VibeKit
Enter App
Bolt.new Alternative — Real Container, Not a Browser Sandbox
Bolt runs your code in a StackBlitz WebContainer — fast, but a browser-tab sandbox with real architectural limits. VibeKit runs your code in a real AWS Fargate container with full Node API access. Same agent loop, different infrastructure. Migrate once you've outgrown the prototype phase.
WebContainer vs Fargate, plainly
StackBlitz WebContainers are a clever WASM trick: a Node.js-compatible runtime that boots in your browser tab in a couple seconds. Great for instant iteration. But it's still a browser sandbox, which means:
- No native binaries. Packages that shell out to system tools (sharp, sqlite native, headless Chrome, anything ffmpeg-flavored) fail.
- Memory + CPU caps bound by the browser tab's allocation.
- No persistence when the tab closes. The app dies with the tab. Bolt re-spins it next time you visit but anything in process state is gone.
- No real public networking. Bolt proxies traffic through StackBlitz; the "URL" you get isn't a normal IP/port on the internet.
Fargate is what most of production runs on: an actual Linux container, on Amazon's hardware, with a real public IP, real memory, real disk, real anything-you-install. No sandbox tradeoffs.
When that matters
If your app is a pure-JS React UI with no native deps, WebContainer probably handles it fine. You only feel the limits when:
- You try to install something like
sharporbetter-sqlite3and it errors - You want your app to keep responding when nobody has a browser tab open
- You want the app to be accessible from a domain you own, not a
*.stackblitz.ioURL - You want to receive webhooks from external services that need to reach your app
Side-by-side
| Bolt | VibeKit | |
|---|---|---|
| Runtime | StackBlitz WebContainer (browser) | AWS Fargate (Linux container) |
| Native npm deps | Limited | Full support |
| Stays online without tab open | No | Yes |
| Real public URL | Proxied via StackBlitz | Native HTTPS at *.vibekit.bot |
| Custom domain | Paid tier | Builder $19/mo |
| Mobile client | No | Native iOS + Telegram |
| AI pricing | Token-metered (1M free / 10M+ on Pro) | BYOK = zero markup, Qwen = free |
| Entry paid tier | Pro $25/mo (10M+ tokens) | Builder $19/mo |
| Team tier | Teams $30/seat/mo | Pro $49/mo (10 apps, no per-seat) |
| Best for | Browser-tab prototyping | Operating apps in production |
See the full vs-Bolt breakdown for the feature comparison. This page is about the migration path.
Migration steps
- Export to GitHub from Bolt. Their export button creates the repo with the current state of your project.
- Install VibeKit on iOS or open app.vibekit.bot on web. Sign in.
- Deploy → Connect GitHub → pick the repo. Choose a subdomain.
- VibeKit clones, builds, and serves. Anything that failed in WebContainer (native deps, etc.) should just work now.
When Bolt's still the right call
For zero-setup browser prototyping of small JS apps, Bolt is excellent — the WebContainer fast-boot model is genuinely useful for "show me what this looks like in 10 seconds". The architectural ceiling shows up only when you want to ship the thing.