Fly.io logo Vast.ai logo

Fly.io vs Vast.ai

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What's good about...

Fly.io logo Fly.io

  • Excellent tooling and developer experience
  • Fast deployments, scale to zero, little config needed
  • Wide range of instance configurations at competitive prices

Vast.ai logo Vast.ai

  • Large pool of over 20,000 GPUs
  • Over 68 GPU types across 40+ data centers
  • Enterprise-grade security with SOC2 certification
  • Pre-built templates including PyTorch, CUDA, and TensorFlow

Price comparison

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

VM Small

Closest config to 1 vCPU, 1 GB RAM.
Fly.io Fly.io
$10.70 / mo 1 vCPU, 2 GB RAM (Shared-CPU-1x)
Vast.ai Vast.ai
--

VM Medium

Closest config to 4 vCPU, 8 GB RAM.
Fly.io Fly.io
$42.79 / mo 4 vCPU, 8 GB RAM (Shared-CPU-4x)
Vast.ai Vast.ai
--

VM Large

Closest config to 8 vCPU, 16 GB RAM (dedicated preferred).
Fly.io Fly.io
$328.04 / mo 8 CPU, 32 GB RAM (Performance-8x)
Vast.ai Vast.ai
--

Block Storage

Closest config to 100+ GB SSD, 3,000+ IOPS, 100+ MB/s throughput, no snapshots.
Fly.io Fly.io
$15.00 / mo 100 GB
Vast.ai Vast.ai
--

Object Storage

Closest config to 1 TB stored, 100 GB in / 250 GB out, 1M GET, 100k PUT/POST.
Fly.io Fly.io
$21.00 / mo 1 TB
Vast.ai Vast.ai
--

Load Balancer

Closest config to TCP, 1 node (1 vCPU, 1 GB RAM), 200+ Mbps, 1,000 conn/sec, 1 TB processed/mo.
Fly.io Fly.io
Included in plan
Vast.ai Vast.ai
--

Managed PostgreSQL

Closest config to 1 node, 2 vCPU, 4 GB RAM, 50+ GB storage, 10 GB read / 5 GB write per month.
Fly.io Fly.io
$33.90 / mo 2 vCPU, 4 GB RAM, 50 GB storage
Vast.ai Vast.ai
--

Free egress allowance

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

1 TB of egress beyond allowance

Fly.io Fly.io
$20.00 $0.02 / GB (Public network North America)
Vast.ai Vast.ai
--

Vast.ai logo Vast.ai Pricing Details

Vast.ai operates as a global marketplace where pricing is billed per second and broken into three components:

  1. Active rental cost for the GPU, charged only when an instance is running.

  2. Storage cost for allocated disk space, which applies as long as the instance exists (even when stopped).

  3. Bandwidth costs for data transfer.

GPU Fleet Overview

Starting Price

Fly.io Fly.io
$1.25/hr
Vast.ai Vast.ai
$0.02/hr

Billing Options

Fly.io Fly.io
On-Demand
Vast.ai Vast.ai
On-DemandSpotReserved (6mo)

Available Models

Fly.io offers 3 GPU models, while Vast.ai offers 56.

Fly.io Fly.io
A100(2) L40S(1) A10(1)
Vast.ai Vast.ai
H100(67) A100(110) H200(54) B200(24) RTX Pro 6000(149) V100(36) RTX A6000(8) L4(16) RTX 4090(280) B300(4)
View all 56 GPUs

Heads up: We do our best to keep these specs & prices accurate. However, cloud costs may fluctuate based on region, usage, and other factors not listed here. These are estimates based on common setups and are for informational purposes only. Always verify current rates & exact specs with the provider before provisioning.

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
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
Vast.ai Vast.ai
United States of America
Founded
Fly.io Fly.io
2017
Vast.ai Vast.ai
2018
Data Center Locations
Fly.io Fly.io
35
Vast.ai Vast.ai
--
Example Customers
Fly.io Fly.io
Cars.com, Fanatics, Tailscale, Supabase, Glitch
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 Feb. 12, 2026, and for Vast.ai on June 23, 2026.