FlexStack
vs
Vast.ai
What's good about each
- Infrastructure stays in your AWS account after cancelling
- Unlimited environments and services on every plan, including free
- Spot pricing for container services
- One-click apps such as Pocketbase, Directus and Umami
- 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
GPUs
Vast.ai offers 66 GPU models. We track no GPU listings from FlexStack. Cheapest listed price per GPU per hour; GPUs both providers sell come first.
| GPU | FlexStack | Vast.ai | Difference |
|---|---|---|---|
H100
49 configs
|
-- | $0.41 /GPU/hr Spot | Vast.ai only |
|
B300
6 configs
|
-- | $5.20 /GPU/hr Spot | Vast.ai only |
|
B200
8 configs
|
-- | $5.94 /GPU/hr Spot | Vast.ai only |
|
RTX PRO 6000
90 configs
|
-- | $0.27 /GPU/hr Spot | Vast.ai only |
|
H200
34 configs
|
-- | $1.32 /GPU/hr Spot | Vast.ai only |
|
RTX 5090
181 configs
|
-- | $0.18 /GPU/hr Spot | Vast.ai only |
|
A100
86 configs
|
-- | $0.18 /GPU/hr Spot | Vast.ai only |
|
RTX 4090
177 configs
|
-- | $0.18 /GPU/hr Spot | Vast.ai only |
|
L40S
43 configs
|
-- | $0.33 /GPU/hr Spot | Vast.ai only |
|
RTX 3090
104 configs
|
-- | $0.08 /GPU/hr Spot | Vast.ai only |
Vast.ai bills on-demand, spot and reserved (1, 3, 6, 12, 24, 36 or 48 months). The line under each price names the billing type shown.
Services
Managed services each provider offers.
| Service | FlexStack | Vast.ai |
|---|---|---|
| GPU-powered Servers | ||
| Managed Containers | ||
| Serverless Cron Jobs | ||
| Static Sites |
Compliance
Frameworks each provider states on its own site, each linked to its source.
| Framework | FlexStack | Vast.ai |
|---|---|---|
| SOC 2 | -- | Type II, platform only |
| HIPAA | -- | Secure Cloud tier only |
| GDPR | -- | Yes |
Heads up: Each entry links to the provider's own statement. An attestation can cover one tier, one region or the platform alone rather than every service. Verify the scope before you rely on it. A dash means we found nothing to link to, not that the provider lacks it.
Company details
| Fact | FlexStack | Vast.ai |
|---|---|---|
| Founded | 2024 | 2018 |
| Headquarters | USA | USA |
| Locations | -- | 10 |
| Example customers | -- | IBM, Brave, Speechify, Cognition, Bosch |
| Website | flexstack.com | vast.ai |
Alternatives to consider
Compare FlexStack and Vast.ai against other cloud providers.
Our data for FlexStack was last updated on Sept. 18, 2026, and for Vast.ai on Oct. 2, 2026.