FINDING 01·Backend and polyglot developers deploying non-Node.js apps·2 sources
Poor support for non-JavaScript runtimes and frameworks
Developers trying to deploy Python (Selenium/headless Chrome), Ruby on Rails, Django, and Flutter apps on Vercel run into missing buildpack equivalents, runtime version errors, and 404 failures — issues that span 2022–2024.
Source
“My last project is python selenium bot… But the problem is I could not find anything like buildpack in vercel to add Chrome and Chromedriver.”
Source
“I'm trying to deploy my Rails application on Vercel directly from the respective GitHub repository but, as you can see from the picture, it throws a 404 error.”
FINDING 02·Enterprise teams and compliance-sensitive companies·1 source
Security breach erodes trust and blocks enterprise adoption
A 2026 discussion reveals that a security breach at Vercel has caused compliance-conscious companies to reconsider the platform entirely, as maintaining security certifications becomes incompatible with staying on Vercel.
Source
“Having read some of the comments about this company after the breach, I'm concerned about building anything else on this platform as my company needs to maintain several security compliance certs.”
FINDING 03·Developers building real-time or stateful web applications·1 source
Lack of WebSocket support on Vercel
Vercel's serverless architecture does not natively support WebSockets, which is a notable enough gap that a competing product (Tilda) was built specifically to address it, as highlighted in a 2025 HN post.
Source
“I made a Vercel alternative with WebSocket support… Tilda is my venture to build a Vercel alternative with a focus on open web standards.”
FINDING 04·Indie developers and small teams hosting web apps·1 source
Vercel's high cost drives users to seek alternatives
Multiple discussions across 2024–2025 highlight that Vercel's pricing is a primary driver pushing developers toward alternatives, with some claiming 7–8x cost savings by self-hosting or switching platforms.
Source
“Own Vercel alternative in 8 less cost. Do self host in one command”