Vast.aiReviews of vast.ai

I have set up and destroyed over 20 instances because I can never access them just a pathetic setup.

Their live chat is always available and the selection of GPU’s is superb! Also the bandwidth prices are way cheaper than AWS and other cloud providers.

I tried to add funds to my Vast.ai balance twice. Both attempts showed an error, but my bank account was still charged, about $35 in total. I received no credits at all. Support told me both transactions had “failed” and that I should simply wait 5–10 business days for the money to return. When I asked for Stripe transaction or reversal references so I could check this with my bank, they only gave me the generic error `card_declined`. So right now I have no credits, no money, and no useful transaction reference — just “wait a few days.” A payment system that can charge the customer while showing an error, followed by support that cannot provide proper transaction details, is a terrible experience. I would not recommend depositing money here until they improve their payment handling and support process.

marco did a fantastic job with helping me customer service was fantastic !

As a host writing this review, I find Support extremely helpful and responsive. Payments and invoicing are processed promptly.

I rented 10 GPU servers on Vast.ai and it's a complete waste of money. Here are my issues: Catastrophic failure rate: Out of 10 servers, barely 1 starts properly. The others refuse to launch. Awful ComfyUI applications: All the applications offered are outdated and incomplete. They don't start or crash immediately with systematic errors. Permanent errors: No matter what application I try, there's ALWAYS an error. It's become predictable. Suspicious business model: The ONLY applications that work without errors are those that require paying for an API key. That's suspicious. Wasted money: I invested in this platform for nothing. Even the servers that do start don't offer reliable functionality.

This company is truly excellent; I earn great returns by hosting my machines on this platform, and the customer service team is very patient when explaining things. The platform is exceptionally well-designed, and I hope everyone uses it for work and to make money. Saber from customer support is incredibly patient!

> I rented a Verified RTX 4090 instance that advertised over 600 Mbps network speeds. GPU training and disk access worked, but outbound transfers were extremely slow and unstable. Throughput sometimes dropped to 10–20 KB/s, and connections repeatedly > terminated while I was trying to retrieve my trained checkpoint. > > I tested direct SSH/SCP, Vast proxy SSH, Jupyter HTTPS, and plain HTTP, with similar results. This wasted more than ten hours of my time and caused additional rental charges. > > Support only stated that bandwidth is shared and not guaranteed, refused compensation, and suggested renting another instance to copy the data—even though that copy would still depend on the affected host’s network. > > I understand that shared bandwidth can fluctuate, but a Verified host delivering effectively unusable throughput with repeated disconnections should be investigated. Customers should not bear all additional costs when they cannot retrieve their > completed work. Based on this experience and the refusal to provide a refund or credit, I will move important training workloads to another platform.