GDBS is a browser-native scientific computing SaaS platform. WebAssembly-powered validated physics across multiple domains with transparent uncertainty on every result - 0.27% on a 60-order-of-magnitude benchmark, no cluster, no install, no job queue. Standard tier is free (registration required); Pro $29.99/user/mo; HPC $39.99/user/mo, cancel anytime. Add-ons: Sandbox, Worklog and Gate $9.99/user/mo each; engine add-ons (BSSN, LIGO, GRMHD) $19.99/mo each, any tier. Compute runs in your browser