Cold Starts in Deployment: What They Are and How to Fix Them
Cold starts make your app slow on the first request. Learn why Railway, Render, and Vercel cause cold starts and how to fix the problem for good in 2026.
Harsh Kanani is a co-founder of Kuberns, an AI-agentic deployment platform. He built Kuberns after running into the same wall every developer hits when they vibe code: AI tools like Cursor and Windsurf make writing code faster than ever, but the moment you need to deploy, everything slows down. Manual configuration, service definitions, instance sizing, and environment variables. None of it belongs in a workflow built around shipping fast. Kuberns exists because he decided to fix that instead of working around it. Harsh writes about the things he has lived: why deployment pipelines break, how to get any framework from code to production without a DevOps background, and what it actually looks like to build and ship software in 2026 using AI. His guides skip the theory and go straight to what works because he has debugged the same errors, hit the same platform walls, and found the same shortcuts that his readers are looking for. He has written deployment guides covering Node.js, Python, Go, React, Next.js, Django, FastAPI, and full-stack MERN applications, and has hands-on experience evaluating every major PaaS platform on the market, Heroku, Render, Railway, Vercel, Netlify, and Fly.io from the perspective of a builder who needs deployment to be the last thing on his mind, not the first.
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Cold starts make your app slow on the first request. Learn why Railway, Render, and Vercel cause cold starts and how to fix the problem for good in 2026.
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