Vercel's Pro plan includes 1TB bandwidth, but overages are charged at $150/TB (~$0.15/GB). Users report unexpected bills of $200+ for simple sites during traffic spikes. Compared to CloudFront's ~$0.085/GB, Vercel charges nearly double for bandwidth overages.

Vercel charges $20 per team member per month on the Pro plan. A 10-person team pays $2,400/year just for the base subscription, before any usage overages. This per-seat model makes costs escalate quickly for growing teams.

AI apps sending large payloads quickly exceed bandwidth quotas. Users report exhausting Pro quotas in days, with one example showing 494 GB-hours in 12 days of testing, projecting $160/month in overages. AI Gateway adds additional costs on top of base pricing.

The platform lacks real-time consumption monitoring of resources. Users can't predict or manage expenses before unexpected bills arrive. One of the biggest issues teams have is the lack of visibility into cost drivers until the bill comes.

Users report accounts being disabled within minutes of deploying projects, with automated emails citing fair use policy violations but providing no specific reason. Appeals go unanswered for weeks. Paid customers report losing access after spending $1,000+ with no recourse.

Users report deployments sometimes failing without clear error messages or obvious reasons. Build step can be interrupted if it exceeds 45-minute limit. Debugging failed deployments is frustrating without adequate error information.

Next.js generates build artifacts optimized for Vercel's infrastructure. Features like next/image, ISR cache invalidation, and edge functions work best (or only) on Vercel. Starting with Next.js 15.1+, some features may break on non-Vercel deployments.

Vercel focuses on frontend deployment, limiting support for databases and backend services. Programmers find they can't create sophisticated full-stack applications. Must use external services for databases, adding complexity and costs.

Users report waiting over 30 hours for support responses, with some issues never resolved. Phone support is Enterprise-only. Support often responds with pre-canned responses without addressing specific technical problems. Can't talk to anyone when critical issues occur.

Users can't simply downgrade or cancel a plan - they're forced to delete an entire team. Can't delete your 'last Hobby team', making it impossible to close your account without jumping through absurd hoops. Billing continues even after attempting to cancel.

Vercel's free Hobby tier prohibits commercial use entirely. Even small revenue-generating projects must upgrade to Pro at $20/user/month. Users discover this after deployment, forcing unexpected cost commitment. No grace period for startups testing viability.

V0.dev requires payment for both Vercel hosting and V0.dev separately before you can bring over your own code. The AI consumes credits unnecessarily, adding unexpected costs. Users feel nickel-and-dimed by the separate billing.

Users report undefined errors at higher loads that Vercel couldn't resolve. Function timeout limits cause issues - functions timing out at 60 seconds on Pro plan despite documentation claiming 300 seconds. Complex apps experience runtime issues with no clear solutions.

Scaling Next.js is problematic due to bad cache invalidation across replicas. ISR (Incremental Static Regeneration) cache invalidation works best on Vercel but causes issues on alternative deployments. Makes it easy to start but harder to grow.