Fly.io logo Vast.ai logo

Fly.io vs Vast.ai

Jump to: What's good Pricing GPUs Services Company details Alternatives

What's good about...

Fly.io logo Fly.io

  • Excellent tooling and developer experience
  • Fast deployments, scale to zero, little config needed
  • Per-second billing, with a 40% discount for reserved compute blocks
  • Anycast networking and global load balancing included at no extra cost

Vast.ai logo Vast.ai

  • Budget cards to Blackwell, including the RTX PRO 6000 and B200
  • On-demand, interruptible and reserved rentals
  • SOC 2 Type II certified, with vetted datacenter hosts in Secure Cloud
  • Host reliability ratings and GPU performance benchmarks
  • REST API, CLI, Python SDK and coding agent plugins

Price comparison

How do Fly.io's prices compare against Vast.ai?

VM Small

Fly.io Fly.io
$5.70 /mo 1 vCPU, 1 GB RAM (shared-cpu-1x)
Vast.ai Vast.ai
--

VM Medium

Fly.io Fly.io
$42.79 /mo 4 vCPU, 8 GB RAM (shared-cpu-4x)
Vast.ai Vast.ai
--

VM Large

Fly.io Fly.io
$248.00 /mo 8 vCPU, 16 GB RAM (performance-8x)
Vast.ai Vast.ai
--

Block Storage

Fly.io Fly.io
$15.00 /mo 100 GB
Vast.ai Vast.ai
--

Object Storage

Fly.io Fly.io
$20.50 /mo 1 TB (Tigris)
Vast.ai Vast.ai
--

Load Balancer

Fly.io Fly.io
Included with apps
Vast.ai Vast.ai
--

Managed PostgreSQL

Fly.io Fly.io
$86.00 /mo 2 vCPU, 2 GB RAM, 50 GB storage (Starter)
Vast.ai Vast.ai
--

Managed Redis®*

Fly.io Fly.io
$20.00 /mo 1 GB data (Upstash Fixed 1GB)
Vast.ai Vast.ai
--

1 TB of egress beyond allowance

Fly.io Fly.io
$20.00 $0.02 / GB (North America and Europe)
Vast.ai Vast.ai
--

Vast.ai logo Vast.ai Pricing Details

Hosts set their own rates. Compute is billed per second from prepaid credits. Storage charges continue while an instance is stopped, and bandwidth fees vary by host.

  • On-demand: Fixed rates for the offer's maximum duration.
  • Interruptible: Bid for capacity. Instances pause if you're outbid or an on-demand renter takes the machine.
  • Reserved: Prepay for a fixed term, with larger discounts for longer commitments.

GPU Fleet Overview

Billing Options

Fly.io Fly.io
--
Vast.ai Vast.ai
On-DemandSpotReserved (1mo)Reserved (3mo)Reserved (6mo)Reserved (12mo)Reserved (24mo)

Available Models

Vast.ai offers 11 GPU models.

Fly.io Fly.io
--
Vast.ai Vast.ai
H100(16) H200(6) A100(7) B200(8) B300(2) RTX 5090(21) RTX 4090(3) RTX 4080(1) RTX 5060 Ti(1) RTX PRO 4000(9)
View all 11 GPUs →

Heads up: A provider's own page may quote a different figure, for example on tax, region or a promotion. A monthly-only plan shows a derived hourly rate. Plan figures take each provider's closest match to a common setup. Verify before provisioning. More on how we price.

Which services do they offer

Here are some managed services that Fly.io and Vast.ai offer:

Service Fly.io Vast.ai
Block Storage
GPU-powered Servers
Load Balancer
Managed Containers
Managed Kubernetes
Managed PostgreSQL
Managed Redis®*
Object Storage
Static Sites
Virtual Private Server (VPS)

Company details

Website
Fly.io Fly.io
fly.io
Vast.ai Vast.ai
vast.ai
Headquarters
Fly.io Fly.io
United States of America US flag
Vast.ai Vast.ai
United States of America US flag
Founded
Fly.io Fly.io
2017
Vast.ai Vast.ai
2018
Data Center Locations
Fly.io Fly.io
18
Vast.ai Vast.ai
10
Example Customers
Fly.io Fly.io
Cars.com, Fanatics, Tailscale, Supabase
Vast.ai Vast.ai
IBM, Brave, Speechify, Cognition, Bosch

Alternatives to consider

Compare Fly.io and Vast.ai against other cloud providers.

View all comparisons

Our data for Fly.io was last updated on Aug. 24, 2026, and for Vast.ai on Sept. 11, 2026.