Definitely scammers Definitely scammers. Happy to accept deposits, but if you want to withdrawal, you have to full KYC despite their website saying only email for under 10k per day. No doubt if you do KYC, they won't give you your money, and will just sell your data anyway. Lesson learnt and money lost.

They made a mistake, but support corrected it in an acceptable timeframe I give Poloniex 3 stars, because my experience was mixed and not ideal, but support resolved the issue acceptably quickly. I transferred cryptos to the site several times without problems but the last time the transfer just vanished from my history, although the tokens did arrive based on the blockchain records. This shocked me and I immediately thought of a scam. I contacted the support and they responded after a few hours and told me, that the will forward this information to the technical department. After not hearing from them for 3 days I contacted the support again and they assured me that they are processing my request. Two days later the deposit arrived. So it took 5 days to resolve the issue, which is acceptable for me, but the errors on the website should be resolved in the future to avoid such errors.

Limit sell orders were not executed and… Limit sell orders were not executed and market sell orders were held for a moment followed by a red wick and at the bottom of the wick my order was sold 8% lower.

Poloniex & Circle are a SCAM!!!! STAY AWAY!!!!! WARNING - DO NOT USE THIS SCAM EXCHANGE!!!! Locks accounts leaving users unable to withdraw their coins. Absolutely no customer support whatsoever - all support tickets are ignored. This exchange is owned by Circle.com - look them up on TrustPilot - their reviews are the same, stealing money, demanding ID, blackmail, scam, etc, etc. Poloniex & Circle are a SCAM!!!! STAY AWAY!!!!!

They're holding my funds hostage Back before Poloniex implemented KYC, they allowed people to deposit as many coins as they wanted. Then, without warning, they implemented KYC and are refusing to allow people to withdraw funds until we give our SSN and a picture of our passport etc. They have already been hacked before and they have a BBB rating of an F so there is no reason to trust them with this much sensitive data. Protect yourself and STAY AWAY.