Venmo is PayPal and as such, it would be a cold day in hell before I supported that crap.
A lot more dirty deeds they do than just hold money for awhile. Do a search on YouTube, there are a lot of great stories over the last few years. It will keep you busy for hours (those darn rabbit holes....)

I would go with Cash App. It is backed by Square.
I believe Square has had some rough patches in the past as well, but nothing like some of these others have.