I prefer open source projects
It's not open source but it is technically non-custodial.
https://edgeapp.zendesk.com/hc/en-us/articles/7019703449115-Edge-White-Paper
There was a security vulnerability recently back that they had to fix:
https://edge.app/blog/company-news/edge-security-incident-urgent-notice/?af=google-com
Discussion
Open source plus popular means most eyes on the code equals most secure.