Hi. I am compiling a list of automatic staking pools (group staking) and arranging them historically from oldest to newest. This list will eventually evolve in a staking pool ranking/comparison.
1) Coin Wallet (Started: April 15, 2015 | Status: hacked/failed | ANN:
https://twitter.com/coinwalletco/status/588264583212752896)
2) PoS Wallet (Started: June 26, 2016 | Status: failed / rebranding to StakeNet | ANN:
https://twitter.com/XSNofficial/status/747105840499302400)
3) BTCPop (Started: August 31st, 2016 | Status: Active. Best and recommended all-in-one platform, link in signature | ANN:
https://btcpop.co/forum/viewthread.php?id=1408)
4) Coins Markets (Started: Before September 26th, 2017 | Status: don't know much about CoinsMarkets other than there are some wallet issues | ANN:
https://bitcointalk.org/index.php?topic=2185903.msg22230851#msg22230851)
5) Stake United (Started: December 20, 2017 | Status: Active | ANN:
https://bitcointalk.org/index.php?topic=2622314.0)
6) Stake Net (Comming soon | ANN:
https://twitter.com/XSNofficial/status/968984184730669057)
Please Feel free to contribute to the list by posting replies. Thanks!