Vast.aiVast.ai is a global GPU marketplace. Use one simple interface to search the marketplace and rent powerful cloud GPUs at reasonable prices. Save 5-6X vs major competitors on cloud GPU rental rates.
Vast.ai (vast.ai) has 249 customer reviews on Five Star Index, with an average rating of 4.2 out of 5.
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IT & Communication · Spring Valley, California
Excellent
IT & Communication · San Francisco, California
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IT & Communication · Los Angeles, California
Excellent
Showing 42 reviews with 1 star · Clear filters
Alper V.
Their Ostris AI template is constantly faulty, Stuck at photo upload, never starting jobs, extremely slow/unresponsive UI. I have been using Ostris AI toolkit locally, and never faced these issues. Bandwidths stated on machine descriptions are totally fake. A claimed 1500Mbps is barely 100Mbps. I will never use this service again. Waste of money and time.
Raz A.
I rented a GPU instance for an important project, but the server was suddenly disconnected without warning. After that, I was completely unable to reconnect to the instance — even when the host clearly showed it was back online. What makes the situation even worse is that I repeatedly contacted support, and they either gave contradictory information or made promises they never fulfilled. I was told that I would be reconnected as soon as the host came online, yet nothing happened. No action, no solution, and no real support. Meanwhile, Vast.ai continued to charge my account, even though I had zero access to the server. This is unacceptable for a service that claims to be reliable and user-friendly. My data was stuck on a machine I couldn’t access, my time was wasted for more than 24 hours, and the overall stress caused by their unresponsive support was simply terrible. For a company operating in the cloud computing and AI training space, this level of service is shocking. At this point, I cannot recommend Vast.ai to anyone who needs a stable, trustworthy GPU provider. If you care about your time, your data, and your money, be very cautious with this platform.
Response from Vast.aiDec 13, 2025
Hi there — I’m genuinely sorry for what you experienced. Losing access to an instance mid‑project, having your data stuck, and then getting inconsistent answers from support is not acceptable. Over the weekend we had an incident. In some cases, a host could appear “online” while access to specific instances was still restricted or unstable during recovery. That doesn’t excuse the impact to you — and we should have communicated more clearly and consistently. You’re also right to call out billing. Being charged while you had zero access isn’t OK. We’ve been issuing refunds/credits for impacted customers in line with a new policy we put in place, and we want to make sure your account was handled correctly and that you’re compensated appropriately. Please reach out so we can fix this directly: Reply to your existing support ticket or open a new one from your Vast.ai dashboard, and link to this Trustpilot review (and please don’t post personal/account details publicly here). We’ve also added additional mitigations and monitoring to reduce the chance of this happening again, along with improvements to incident handling and communication. — Vast.ai Support Team
Maunik R.
I honestly don’t even know where to begin. I’ve been dealing with weeks of downtime on my server, and the worst part isn’t even the outage itself it’s how completely abandoned I felt throughout the entire experience. My work, my data, everything I was running… all of it was just suddenly out of reach with no real explanation and no meaningful help. I kept reaching out to customer support hoping someone would finally give me a straight answer, and instead I got responses that felt dismissive and completely out of touch with what was actually happening. I was told stories about “power outages” and issues that simply didn’t match reality, especially when the host clearly had other machines running just fine. Seeing that and having screenshots to prove it made it feel like I wasn’t being told the truth at all. It’s incredibly frustrating to trust a platform with important work only to be met with silence, mixed messages, and what felt like excuses. Being without my data for this long genuinely impacted my project, and the lack of transparency made it even worse. You start to wonder if anyone is actually looking into your issue or if you’re just supposed to wait indefinitely and hope your work magically comes back. I’m writing this because no one should have to go through this level of stress and uncertainty with a service they’re paying for. This whole experience left me feeling disappointed, angry, and honestly a bit betrayed. I really hope the company realizes how damaging this kind of communication and downtime can be for real customers with real work depending on them.
Response from Vast.aiDec 13, 2025
Hi there, I’m truly sorry. Weeks of downtime is painful enough on its own, but feeling ignored, dismissed, or misled while you’re locked out of your work is even worse. You deserved clear answers, real ownership of the issue, and an obvious escalation path and we didn’t deliver that. This weekend we also had an incident that forced a difficult recovery and restrictions for some users, and we know that for certain customers it compounded ongoing reliability problems. Regardless of the root cause in your specific case, the communication you describe (mixed messages, delays, and a lack of transparency) is on us. We’ve issued refunds/credits in accordance with a new policy, and we’ve implemented additional mitigations and operational changes to reduce recurrence and improve how we communicate during incidents. While none of that restores the time and stress you lost, we do want to make sure you’re properly compensated. Please reach out so we can review your case and make it right: Contact support via your Vast.ai dashboard (or reply to your most recent support thread) and a link to this Trustpilot review (again, please don’t post private details here). Thank you for writing this, we take it seriously, and we’re committed to doing better. — Vast.ai Team
al A.
the gpus had issues i contacted support they couldnt care less and would send me guides from the site that i said i followed and it didnt work and they ended up just telling me to not use the product and shutdown the gpu, im charging back dont use their services
Response from Vast.aiJul 1, 2025
Hi al al, Thank you for taking the time to share your feedback. We are sincerely sorry to hear about the issues you experienced with your GPU and the support you received. The experience you described is not the standard we aim to provide. Our support team's goal is to resolve technical problems, and the advice fell short. We want to investigate this immediately, but we have been unable to locate your account or any support tickets under the name "al al." Please, could you reach out to us directly at [email protected] and reference your Trustpilot review? If you could provide your account email we can refund any charges and see what happened with the service. We value your business and hope you will give us a chance to make this right. Sincerely, The Vast.ai Team
James B.
I can say this is the worst GPU rental site I’ve ever used. Most of the servers are very outdated, with terrible disks and poor internet connections. The good ones are extremely overpriced. Customer support doesn’t respond for almost an hour and doesn’t solve any issues. Even if you set up backups, they don’t work. They keep charging you even if the server goes down. I definitely do not recommend it.
Response from Vast.aiJun 18, 2025
Hi James, We’re really sorry your rental didn’t meet expectations. We’ve just sent you a private “Request information” via Trustpilot. If you can share the e‑mail or rental ID linked to your account, we will: Issue a complete refund for the affected period, no questions asked. Review your past support tickets so we can tighten our first‑response time and improve. If you prefer, you can also reach us 24 / 7 at [email protected]—please mention this review so we can route your message straight to an engineer. Thank you for bringing this to our attention. Your feedback helps us improve the platform for everyone. — Vast.ai Customer Success Team
F P.
I had a terrible experience with this company. Their official Stable Diffusion templates are flawed, producing outputs that lack prompt adherence, realism, and are often disfigured or distorted. I contacted them, but they ignored me and refused to refund me for the many hours I spent troubleshooting issues that were not my fault.
Response from Vast.aiMay 25, 2025
Hi F P, We’re truly sorry your first experience with Vast.ai fell short. The Stable Diffusion template you used should have worked, and it’s clear we let you down—first with the technical issue and then by not responding promptly. We’ve now issued a full refund of all your charges. Because the workload was deleted more than two weeks ago, we no longer have the logs needed to re-create and diagnose what went wrong. That said, we’re reviewing our templates and support workflows to prevent a repeat of this situation for anyone else. Thank you for the candid feedback. It helps us improve. — Vast.ai Support
Hardley a good R.
Prices seem good but its all a ploy to get you to add a balance. Then you just cant connect to any machine. I tried 4 of them. They have insanely over secured SSH settings. Total waste time and the support just tells you to "Read the docs" I did read the docs. I sent you the terminal and it did not work. Thats why im messaging you. Im off to Runpod which actually works within 15 minutes of setup and has clear instructions.
Response from Vast.aiJan 14, 2025
Hello, Thank you for sharing your feedback, and we’re sorry you had a frustrating experience. We can assure you there’s no “ploy” involved; in fact, we offer full refunds for any unused credits. So we will happily refund your balance. We take pride in having a 4.3 average rating, and we’re disappointed your experience didn’t reflect that. We appreciate your input and will continue working to make our documentation and support even clearer. If you change your mind and decide to give us another try, we’d be glad to personally help you get up and running.
Oula S.
really bad support im ask about why i cant rent any vps on vast.ai but they always just read my chat its really bad and they banning me on his discord channel
Response from Vast.aiNov 22, 2024
Thanks for your feedback. At Vast.ai, maintaining a secure and trustworthy environment for all our customers is a top priority. To ensure this, we follow strict guidelines and review all transactions closely. Unfortunately, in cases where our system identifies suspicious activity or potential misuse, we may take steps to protect our business and customers, including limiting access.