The best Coinhive alternative is definitely Crypto-loot

- Pros
Has the same kind of webminer as Coinhive
Has the same url shortener (The Proof of work shortener for faucet owners and the likes)
Has POW captcha

- Cons
Has a 20% fee

I use this one personally because it is the easiest one on the market, but the captchas can be quite hard for slow computers I have noticed.
It is great for faucet owners tho because they are guaranteed earnings from every short url and it stops bots.