Vast.ai vs CoreWeave
Both are alternatives to AWS GPU Instances. Here's how they stack up — verified facts, no spin.
Also searched as CoreWeave vs Vast.ai — same comparison, one verdict.
Vast.ai
A marketplace where hosts bid for your workload — the cheapest hour available.
Vast.ai is a peer-to-peer marketplace rather than a cloud: independent operators list spare GPUs and you rent whichever meets your requirements, with H100 capacity often appearing around $1.87 per hour and older cards far cheaper. Because supply is competitive, it is reliably the lowest price in this comparison. The trade-off is exactly what you would expect from a marketplace — hardware, network quality and host reliability vary listing by listing, and prices float in real time rather than sitting on a rate card.
CoreWeave
Bare-metal Kubernetes at enterprise scale — where large training runs actually live.
CoreWeave is the specialist that competes with hyperscalers rather than undercutting them: bare-metal GPU nodes, Kubernetes-native orchestration and high-bandwidth interconnect built for training runs spanning many machines. H100 PCIe capacity lists around $4.25 per hour — the most expensive alternative here and still roughly a third of AWS. It is the honest answer for organisations running large distributed training that need enterprise contracts and support, and overkill for anyone fine-tuning on a single card.
Side by side
| Vast.ai | CoreWeave | |
|---|---|---|
| Sovereignty Score | 52 | 46 |
| Open source | No | No |
| Self-hostable | No | No |
| Local-first | No | No |
| License | Proprietary (hosted marketplace) | Proprietary (hosted service) |
| Pricing | Marketplace pricing that fluctuates with supply — H100 listings commonly near $1.87/hr, consumer cards such as the RTX 4090 dramatically cheaper. Interruptible bids cost less again. Rates observed 2026-07-30. | H100 PCIe around $4.25/hr on demand, with committed contracts materially cheaper. Enterprise agreements are quote-based. Verified 2026-07-30. |
Vast.ai edges it on the Sovereignty Score, but the right pick depends on the trade-offs below.
Vast.ai
Strengths
- +Consistently the cheapest GPU hours available anywhere in this comparison
- +Enormous variety, including consumer cards ideal for smaller models
- +Interruptible bidding drops the price further for tolerant workloads
- +No commitment and no minimum spend
Trade-offs
- −Host quality varies — reliability, network and disk speed are not uniform
- −Prices move in real time, so budgeting is harder than a fixed rate card
- −Least suitable of these for anything sensitive: hardware is operated by third parties
- −No meaningful enterprise support or compliance story
CoreWeave
Strengths
- +Bare metal with high-bandwidth interconnect — built for multi-node training
- +Kubernetes-native, so it fits an existing platform team's tooling
- +Enterprise contracts, support and capacity guarantees
- +About a third of AWS on-demand pricing at scale
Trade-offs
- −The most expensive alternative here — clearly aimed at large workloads
- −Kubernetes-first means real platform expertise is assumed
- −Overkill for single-GPU experiments or light fine-tuning
- −Enterprise pricing is opaque until you talk to sales
More AWS GPU Instances head-to-heads
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Facts verified 2026-07-30. Licenses and pricing change — spotted something out of date? That's a correction we want.