Is it safe to go viral with my vibe-coded app?
Most vibe-coded apps are fine at 10 users and break in three different ways at 10,000. The biggest risks at scale are (1) cost blow-up from OpenAI/Supabase usage, (2) a latent security bug that never mattered now affecting thousands, (3) a missing rate-limit that lets one attacker crater your bill. Fix these three before the tweet.
Going viral is not the time to discover bugs. The three pre-viral checks:
**1. Cost firewall.** Set spending caps on every paid service: - OpenAI: `max_tokens` per request + hard monthly limit in the dashboard - Anthropic: same - Supabase: project settings → usage limit - Stripe: nothing to cap (good), but make sure your pricing logic can't be gamed for free usage - Vercel: function execution budget
Without caps, one angry-internet-moment can generate a 5-figure bill overnight.
**2. Rate limit every endpoint that triggers a paid call.** Chat endpoint that calls OpenAI? 10 requests per user per minute, max. Endpoint that sends email? Same. Endpoint that queries your DB heavily? Same. Use Upstash Ratelimit or a similar service — it's literally 10 lines of code.
**3. RLS on every user-data table.** At 10 users, a broken RLS policy might never get noticed. At 100,000 users, someone curious will find it in hours. Check RLS everywhere before you post the launch tweet.
**Also lock down:** - Sign-up rate limit (otherwise bots create 10K accounts to exhaust your free tier) - Email-verification before any paid action (otherwise bots burn OpenAI credits on sign-up) - CORS (otherwise another site embeds yours and proxies requests through your users)
Securie's free scan (launching this year) will run every one of these checks before your viral moment. Join the list now to have it ready — pre-viral scans take <5 min to read; post-viral incident response takes the rest of your weekend.