What's good about...
FlexStack
- One-click deploy to AWS without complicated infrastructure or templates
- Easy-to-use dashboard and excellent documentation
- No vendor lock-in - uses your own AWS account and can "eject" anytime
- Generous free tier with affordable monthly plans
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
FlexStack Pricing
FlexStack charges a fixed subscription fee on top of your AWS usage. It's available in three plans including a free tier:
- Starter $0/mo: Includes 1 environment, 1 team member and 2 running services.
- Indie $9/mo: Includes 10 environments, 1 team member and 50 running services.
- Team $29/user/mo: Unlimited environments, team members and services.
You can view the complete list of features on their pricing page.
Vast.ai Pricing
Vast.ai operates as a global marketplace where pricing is billed per second and broken into three components:
-
Active rental cost for the GPU, charged only when an instance is running.
-
Storage cost for allocated disk space, which applies as long as the instance exists (even when stopped).
-
Bandwidth costs for data transfer.
GPU Fleet Overview
Starting Price
FlexStack
Vast.ai
Billing Options
FlexStack
Vast.ai
Available Models
Vast.ai offers 56 GPU models.
FlexStack
H100Heads 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 FlexStack and Vast.ai offer:
| Service |
FlexStack
|
Vast.ai
|
|---|---|---|
| GPU-powered Servers |
Company details
|
FlexStack
|
Vast.ai
|
|
|---|---|---|
| Website | flexstack.com | vast.ai |
| Headquarters | United States of America | United States of America |
| Founded | 2024 | 2018 |
| Data Center Locations | -- | -- |
| Example Customers | -- | IBM, Brave, Speechify, Cognition, Bosch |
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Alternatives to consider
Compare FlexStack and Vast.ai against other cloud providers.
Our data for FlexStack was last updated on Feb. 12, 2026, and for Vast.ai on June 23, 2026.