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Bult offers flexible compute sizes to match your app’s needs, billed per minute. Free tier includes XS, S, and M. Pro plan (September 2026) unlocks L to 3XL. Configure in Canvas UI’s “General” tab in “Edit Service”: Screenshot 2025-08-07 at 19.46.36.png View Compute Sizes minutely, hourly, and monthly: https://bult.ai/#pricing. Details:
  • Instances: Free tier supports 1-2 instances per service; Pro allows up to 10.
  • Scaling: Auto-scaling available with Pro plan. Manual scaling in Canvas UI.
  • Usage: Monitor CPU/RAM in app.bult.ai/usage. Example: XS at 21.12 hours costs $0.03 (CPU) + $0.04 (RAM).
  • Limits: Free tier caps at 0.5 vCPU, 1GB RAM total. Pro supports up to 8 vCPU, 16GB RAM.
  • Optimization: Start with XS for prototypes. Upgrade to M/L for production to avoid “Out of capacity” errors.
Example: Deploy an Express.js app with XS compute:
  1. Select “GitHub Repository” in Canvas UI.
  2. Set compute to XS (0.1 vCPU, 0.25 GB RAM).
  3. Deploy and monitor costs in app.bult.ai/usage.