Thank you for the Request To Answer (RTA). There are many mutual fund platforms to choose from. While i do not wish to comment on any specific platform, here are a couple of thoughts on what engenders trust.
The product or service offering must have a transparent and fair price. If You should be able to easily understand how the service provider is going to make revenue and survive.
Anything that is offered completely free may have some hidden costs. If the pricing model is ‘free’, then you may be the product, as the saying goes 🙂