Hmm.
I use Admiral Shares of Vanguard index funds, which have all of the benefits you describe, plus you can choose or customize your fund split with free advice from them. The expense ratio on the funds I use are all 0.05%.
Vanguard doesn't do referral links, though, sorry :-)
Correct me if I'm wrong. Doesn't Admiral Shares require a 5 to 10k minimum per fund you put money in? My wife's 403b uses Vanguard and has no minimums for any of the funds, but I don't think they'd work well with our IRAs as the minimums would make it hard to diversify.
This is a lot like Betterment. Like Betterment, the advantages seem small enough that it's not worth the extra cost (and the advantages are really disadvantages IMO - maybe the man should come out from behind the curtain).
It is a lot like Betterment. Same idea with similar fees. Although Wealthfront does first 10k free, plus the referral for my wife, I don't actually pay Wealthfront a penny currently. I've got a total of $30k free now.
Looking at Betterment's investment categories, Wealthfront seems much better though. Betterment has 65% in US stocks, split between VTI, S&P, Russell 2k and Russell Mid. Wealthfront has a more in international and also has REITs and corporate bonds. Here's the breakdown for my IRA.
INVESTMENT TARGET
US Stocks Vanguard VTI ETF 20%
Foreign Stocks Vanguard VEA ETF 18%
Emerging Markets Vanguard VWO ETF 31%
Dividend Stocks Vanguard VIG ETF 5%
Real Estate Vanguard VNQ ETF 16%
Corporate Bonds iShares LQD ETF 5%
Emerging Market Bonds iShares EMB ETF 5%