ViperatechReviews of viperatech.com

I purchased a used Bitmain Antminer Z15 Pro from ViperaTech in October and paid approximately €4,090 via bank transfer. Months passed without receiving the product. After numerous emails and messages, communication became increasingly difficult. I requested a refund in January due to the lack of delivery and the ongoing issues. Since then, I have received little to no meaningful assistance. I was given contacts for different representatives, including "James" and later "Hamza", but neither provided a resolution. Promises were made, but nothing was actually resolved. We are now in June, and after many months of waiting, chasing updates, requesting a refund, and trying every possible communication channel, I still do not have my money back. I have retained all documentation, including the quotation, proof of payment, email correspondence, and records of my refund request. I have already contacted my bank regarding the transaction and am considering further legal action. The most frustrating part is not only the financial loss, but the complete lack of professional communication and customer support. A legitimate business should not leave a customer waiting for months without a clear resolution. Based on my personal experience, I cannot recommend ViperaTech. If you are considering sending a large bank transfer to this company, be extremely cautious. €4,090 lost, months of waiting, and no satisfactory resolution. Extremely disappointing experience.

Horrible experience. Item ordered was not in stock. No one notified me. No record of order other than receipt from payment processor. No one answers phone. Chat was available at first, was told a refund no problem, then refund issued, then ghosted me. Had to initiate a charge back from Visa. Thank goodness I used a credit card. Shady company, avoid!

I rarely write negative reviews, but this experience with Viperatech has been a complete nightmare from start to finish. The moment payment was sent, the professionalism disappeared. We were given a delivery timeframe that ended up taking nearly three times longer than promised. During that period, communication was extremely poor. Emails and WhatsApp messages would go unanswered for days. We constantly had to follow up just to get basic updates. To make matters worse, when the unit was finally shipped, no tracking number was provided. After repeatedly asking for information, we discovered the miner had been shipped to a completely wrong address — one of their previous clients — located two hours away from us. We then had to wait another 1–2 weeks to finally receive it. The entire shipping process was chaotic and disorganized. Once the miner arrived, problems started within the first month. This raises serious doubts about whether the equipment sold is actually new, as advertised. The company claims to offer a two-year warranty. However, when we contacted them to request support under that warranty, they simply stopped responding. It has now been 3 months of emails and WhatsApp messages with no meaningful reply. A warranty is meaningless if the company refuses to answer. If you are considering purchasing from Viperatech, understand that once they receive your money, communication and support may become extremely difficult. Based on our experience, I strongly recommend exercising caution.

I am still waiting for my order to be fulfilled. Someone from Viperatech ought to give me a call.

I am having trouble getting in touch with anyone at Viperatech. One of my coin miners was stuck in Customs. Now I am told it was sent back to shipper, but I cannot get in touch with them. If I can get this resolved, I would be happy to change my rating. Update - Figured out how to find a live body to speak to at parcel company. I called the 1/800 number automated support. I must say I had to be emotional to get automated attendant to not keep getting shuffling me along for automated options. A very helpful and polite woman with a very pretty name answered and ultimately gave me the Shipper's email address (In Hong Kong.) I wrote to them in English then translated to Chinese and sent both. I have never handled by own shipping when I buy something else. Anyway, I'm learning something new. I don't think Viperatech is a bad company, but it's strange that I cannot seem to get anyone to talk to me anymore. I had very good rapport with them, then something happened and bam, "Talk to UPS" and silence. I am hoping it gets handled before the 1st year anniversary of my purchase. Perhaps there is nothing they can do so why answer the phone. It's like "The number you have reached is part of an answering system that hasn't been set up yet. Please let your friend know about this the next time you connect with them. If I'm dragging anyone through the mud unjustly, someone please enlighten me. Call me. Talk to me. Is this just part of the risk? Update - My package was returned to shipper. I am trying to get in touch with them. They are in Hong Kong. I don't think this should be left to me. What do others think?

Ordered one ASIC as a test order; Vipera never sent it. They simply took my money and ran, they have not issued a refund as of this writing. Do NOT trust them!

I purchased a single Bitmain Antminer S21+ 235T from Viperatech from their USA inventory in April 2025. However, it arrived owing $112 COD for "brokerage fees", having arrived from Hong Kong. I tried calling Viperatec, I tried emailing them, and finally, after threatening to write bad reviews, they responded on Whatsapp. They refused to refund me the brokerage fee, despite me having specifically ordered from their USA stock. Instead, they offered me credit toward future Viperatech purchases, which I wasn't going to do. It was simply bad business. They changed my order without telling me, then increased my expense, and refused to give my money back. I would not order from them again.

Deceptive. Ordered a 4070 super and they sent me a base model 4070. Customer service won't respond to any of my messages. In addition, take a closer look at the trustpilot reviews. It's all bots. Honestly compared to other's experiences, I'm surprised I even received a card at all.