Endowus does unit trusts. Their overall fees (platform + fund expense ratios) are one of the highest. Flip side is everything is in SGD, so no worries about currency fluctuations and US dividend tax and estate tax. One more thing to note is that Endowus prime offering (Dimensional Funds) is all about value. Unfortunately value has been underperforming for years. Whether it will keep underperforming or revert to mean is anyone's guess, but basically it has been underperforming the market for about the last 10 years I think.
Syfe does ETFs and is the only Robo doing REITs. So if you like REITs, Syfe is the way to go. The total cost is also very respectable and one of the lowest.
Syfe ARI is about risk management, so may be helpful for someone who is risk adverse. Because of sREITs and some of the ETFs in 100%Equities are UCITs compliant, not everything is under US dividend or estate taxable. But you need to know the difference and make an effort in your own portfolio construction. If US taxes are a big deal to you, Endowus is probably better for a no-worries approach.
Stashaway is pure US etfs. No running away from dividend or estate taxes. (Except for the local income portfolio which looks like rubbish. To me.)
Stashaway is also about risk management so you can probably pick a low risk portfolio. It also seems to produce better results than Syfe, but don't quote me on that.
Expense-wise, Stashaway is more expensive than Syfe until you hit about the 7 digit mark. But not by too much and still lower than Endowus.
If you like having all your investments in one place, note that Endowus is the ONLY robo thus far that allows CPF investing. It also allows SRS investing to cover all bases.
Stashaway does SRS, but no CPF.
Syfe only does cash but the claim is that SRS is on the way. No timeline that I know of though.
