10 Mistakes Beginners Make When Deploying Apps on Vercel

Deploying your app on Vercel can feel like a breeze—until it doesn’t. As someone who’s navigated these waters, I can tell you that beginners often stumble over the same pitfalls. In 2026, with Vercel's continuous updates, it’s crucial to avoid these common mistakes to ensure a smooth deployment experience.

1. Ignoring Environment Variables

What it is: Environment variables store sensitive information like API keys.

Mistake: Beginners often forget to set these up in the Vercel dashboard, leading to crashes or broken features.

Our take: Always double-check your environment variables. They’re easy to overlook but critical for your app’s functionality.

2. Not Utilizing the Vercel CLI

What it is: The Vercel Command Line Interface (CLI) allows for more control over deployment.

Mistake: Many beginners deploy directly from the GitHub integration without using the CLI, missing out on useful commands.

Our take: We use the CLI for deploying branches and preview URLs. It’s a game-changer for testing before going live.

3. Misconfiguring the Build Settings

What it is: Build settings determine how your project compiles and runs.

Mistake: Incorrect configurations can lead to deployment failures or unexpected behavior.

Our take: When we first started, we overlooked this and faced deployment errors. Always review your build settings in detail.

4. Skipping the Preview Deployments

What it is: Preview deployments show how your changes will look before merging.

Mistake: Beginners often deploy straight to production, risking bugs in the live app.

Our take: We rely on preview deployments to catch issues early. It saves us from embarrassing errors in production.

5. Overlooking the CDN Benefits

What it is: Vercel uses a global Content Delivery Network (CDN) to serve your static assets.

Mistake: Some beginners don’t take full advantage of this, leading to slower load times.

Our take: We optimize our assets to leverage the CDN effectively. This has improved our app's performance significantly.

6. Not Monitoring Performance Metrics

What it is: Vercel provides monitoring tools to track app performance.

Mistake: Many beginners ignore these insights, missing opportunities for optimization.

Our take: We frequently check the performance metrics to identify bottlenecks. It’s crucial for maintaining a responsive application.

7. Forgetting to Set Up Custom Domains

What it is: Custom domains enhance branding and professionalism.

Mistake: Beginners often stick with the default Vercel domain, missing out on branding opportunities.

Our take: We set up custom domains early in our projects. It’s a simple step that makes a big difference.

8. Not Utilizing Serverless Functions

What it is: Serverless functions allow you to run backend code without managing servers.

Mistake: Beginners often underestimate their utility, overloading their frontend instead.

Our take: We use serverless functions for lightweight API interactions, which keeps our frontend clean and fast.

9. Ignoring Deployment Logs

What it is: Vercel provides logs for each deployment.

Mistake: Skipping these logs can lead to unresolved issues.

Our take: We’ve learned the hard way to check the logs. They often reveal the root cause of deployment failures.

10. Underestimating the Learning Curve

What it is: Vercel has a rich feature set that can be overwhelming.

Mistake: Beginners dive in without understanding the platform, leading to frustration.

Our take: Take time to explore Vercel’s documentation and tutorials. It’s worth the investment to avoid common pitfalls.

| Mistake | Impact | Solution | Frequency of Occurrence | |------------------------------|------------------------------------|--------------------------------|-------------------------| | Ignoring Environment Variables | App crashes or broken features | Double-check variable setup | High | | Not Utilizing the Vercel CLI | Limited control over deployment | Use CLI for deployment | Medium | | Misconfiguring Build Settings | Deployment failures | Review settings in detail | High | | Skipping Preview Deployments | Bugs in production | Always use preview deployments | High | | Overlooking CDN Benefits | Slower load times | Optimize assets for CDN | Medium | | Not Monitoring Performance | Missed optimization opportunities | Regularly check metrics | Medium | | Forgetting Custom Domains | Missed branding opportunities | Set up custom domains early | High | | Not Utilizing Serverless Functions | Frontend overload | Use for API interactions | Medium | | Ignoring Deployment Logs | Unresolved issues | Check logs regularly | Medium | | Underestimating Learning Curve | Frustration with the platform | Explore documentation | High |

Conclusion

To avoid the common pitfalls of deploying apps on Vercel, start by setting up your environment variables and utilizing the CLI. Make sure to leverage preview deployments, monitor performance metrics, and always check your deployment logs.

What’s Next? Dive deeper into Vercel’s documentation or check out our podcast, Built This Week, for more practical insights on tools and deployment strategies.