Supabase (Postgres + Auth) vs. Fly.io Firecracker MicroVMs — Interactive Cost & Performance Calculator
Compare Supabase (Postgres + Auth) vs Fly.io Firecracker MicroVMs side-by-side. Use our interactive calculator to estimate exact monthly costs, savings, and performance trade-offs at your scale.
Supabase (Postgres + Auth)
Best for: Full-stack Postgres with Row-Level Security & Realtime
Fly.io Firecracker MicroVMs
Best for: Multi-region stateful Elixir, Go & Rust servers
Side-by-Side Technical & Commercial Breakdown: Supabase (Postgres + Auth) vs. Fly.io Firecracker MicroVMs
| Dimension | Supabase (Postgres + Auth) | Fly.io Firecracker MicroVMs |
|---|---|---|
| Platform Provider | Supabase | Fly.io |
| Base Monthly Plan | $25/mo | $10/mo |
| Compute Rate (per 1M reqs) | $0.20 | $0.14 |
| Storage / Bandwidth (per GB) | $0.125/GB | $0.150/GB |
| Typical Cold Start | 0 ms (Dedicated Postgres) | 250 ms machine wake |
| Included Free Tier | 500MB database + 50,000 MAUs | Pay-as-you-go resource consumption |
| Best Use Case | Full-stack Postgres with Row-Level Security & Realtime | Multi-region stateful Elixir, Go & Rust servers |
Frequently Asked Questions
Which is more cost-effective in 2026: Supabase (Postgres + Auth) or Fly.io Firecracker MicroVMs?
It depends on your workload volume. Use the interactive sliders above to model your exact monthly scale. Supabase (Postgres + Auth) (Full-stack Postgres with Row-Level Security & Realtime) and Fly.io Firecracker MicroVMs (Multi-region stateful Elixir, Go & Rust servers) have different unit economics that cross over as volume scales.
When should an engineering team choose Supabase (Postgres + Auth) over Fly.io Firecracker MicroVMs?
Choose Supabase (Postgres + Auth) when your primary priority is: Full-stack Postgres with Row-Level Security & Realtime. Choose Fly.io Firecracker MicroVMs when you prioritize: Multi-region stateful Elixir, Go & Rust servers.