Thanks RocketSingh,
It looks like BitPay is using them, do you know of any other companies using this solution?
BitPay built it and they are using it as well.
LocalBitcoins.com is also using it. Here is their instance -
https://www.localbitcoinschain.comtheymos, the admin of this forum, built the first block explorer on
https://blockexplorer.com. That is now running an Insight instance as well.