Vast.ai
A marketplace where hosts bid for your workload — the cheapest hour available.
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sovereigntyVast.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.
SOURCE-AVAILABLEProprietary (hosted marketplace)
LicenseProprietary (hosted marketplace)
PricingMarketplace 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.
Open sourceNo
Self-hostableNo
Local-first dataNo
What it does well
- +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
Where it falls short
- −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
Vast.ai as an alternative to
Where Vast.ai shows up in our comparisons, and how it ranked.
Vast.ai head-to-head
Straight comparisons against the tools people weigh it against.