Most teams do not need "a preview tool." They need a specific kind of review workflow.
Sometimes the right answer is Vercel. Sometimes it is Netlify. Sometimes it is ngrok. Sometimes it is prev. The mistake is choosing based on the word "preview" instead of the job the URL has to do.
The Decision in One Minute
- Use Vercel when your production app already belongs on Vercel, especially for Next.js and frontend-heavy teams.
- Use Netlify when your site is already a Netlify site and you want deploy previews tied to pull requests.
- Use ngrok when you need to expose something running on your laptop for a short live debugging or demo session.
- Use prev when reviewers need a durable, isolated URL for a self-contained web app, without depending on your laptop or a shared staging server.
What Kind of URL Do You Need?
Every tool in this category can produce a URL. The difference is what the URL represents.
| Workflow | Best Fit | Why |
|---|---|---|
| Next.js app hosted on Vercel | Vercel | Preview deploys are part of the hosting workflow. |
| Netlify site or Jamstack workflow | Netlify | Deploy Previews are tied to the connected site and PR flow. |
| Local webhook testing or live laptop demo | ngrok | It tunnels traffic to a local service quickly. |
| Backend app, Dockerfile app, or staging replacement | prev | It creates an isolated cloud preview with a TTL. |
Use Vercel When Production Is Vercel
Vercel is excellent when your production deployment, preview deployment, and frontend framework all live in the same ecosystem. Pull requests can get preview deployments automatically, and the platform is deeply optimized around Next.js and modern frontend workflows.
If that is your world, use it. A separate preview tool may only add complexity.
The gap appears when the thing you need to review is not a Vercel-shaped application: a containerized backend, a Django or Rails app, a Go service with a web UI, or a full-stack app whose production hosting lives somewhere else.
Use Netlify When the Site Is Netlify
Netlify Deploy Previews are a strong fit for sites already connected to Netlify. They are especially natural for frontend, content, and Jamstack workflows where the preview belongs to the same deployment platform as production.
Again, that is the key: if the site is already a Netlify site, the preview workflow is already there. Use it.
If the review target is a backend app, a Dockerfile-based web app, or a service that should not be coupled to your production hosting provider, a hosting-platform preview may not be the cleanest fit.
Use ngrok When Local Is the Point
ngrok is great when the service needs to keep running on your machine. Webhook development, pair debugging, quick internal demos, OAuth callback testing - this is where tunneling shines.
But a tunnel is not the same thing as a preview environment. If your laptop sleeps, your demo dies. If your local database changes, the reviewer sees a different state. If someone needs to review the work tomorrow, you are now part of the infrastructure.
That can be perfect for debugging. It is fragile for asynchronous review.
Use prev When Review Needs to Survive You
prev is for the cases where a reviewer needs a URL that lives independently from the developer's machine and independently from a shared staging server.
That matters when:
- QA needs to test one branch while another branch is being reviewed.
- A client needs a demo URL that will not be overwritten by the next deploy.
- A backend or Dockerfile-based web app needs to be reviewed as a running service.
- The team wants temporary environments with automatic expiration.
prev is not production hosting. It is not a tunnel. It is not a static-site hosting platform. It is a way to make review environments disposable, isolated, and easy to share.
The Practical Rule
Pick the tool based on what would make the review fail:
- If the review fails because production hosting and previews should be one system, use your hosting platform.
- If the review fails because the service must run locally, use a tunnel.
- If the review fails because shared staging is busy, overwritten, or too expensive to maintain for every branch, use prev.
Where prev Fits Next to Them
prev often complements these tools rather than replacing them.
A team might host a Next.js frontend on Vercel, deploy marketing pages on Netlify, use ngrok for webhook development, and still use prev for backend previews, Dockerfile apps, or client review environments that need to stay alive after a developer closes their laptop.
The point is not tool purity. The point is getting the right URL to the right reviewer without turning staging into a queue.
Try prev when your review workflow needs isolated previews, not another shared environment.