Poloniex used to be great in 2015/6 Poloniex used to be great in 2015/6. They have become worse and worse again as time has passed, coins/tokens have vanished and trading is near impossible within the UK now, my savings held in poloniex have vanished, I am completely frustrated and disappointed with them.

SCAM ALERT. Avoid at all costs. Stole money from customers in 2019 when their technical incompetency lost them 1800 BTC. They called the theft "socialized losses". Most victims of the theft have not been reimbursed in 2022 still, 3 years later, even though the exchange is still running and in business. Customer service is being useless and dodging questions. Poloniex obviously doesn't plan on doing anything. There are many other exchanges out there. Avoid like the plague.

Poloniex is a scam and possibly a… Poloniex is a scam and possibly a fraudulent company. Ever since it has been sold to Justin Sun (a known fraudster and cryptocurrency celebrity marketeer). Also its been partly owned and bought by Circle, a large Wallstreet backed firm who are notorious for giving their customers a run-around forever. You will never be able to withdraw your funds. Poloniex will find endless reasons and excuses as to which terms and conditions (small print) you happen to fall into and therefore cannot comply with their never-ending security procedures. It is in their best interests to withhold user funds and never return them. Good luck!

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.

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.