The short/salty answer: EnvKey's app and client libraries are end-to-end encrypted and open source so that you don't have to trust our servers with your data.
The longer answer:
I run EnvKey - https://www.linkedin.com/in/daneschneider, along with help from a small marketing team and OpsZero (https://www.opszero.com/), a Kubernetes-focused devops consultancy that has worked with several YC companies. I've worked as a developer/consultant for a long time for various startups and agencies, both in the US and, for a 2-year stint, in Australia.
My most recent job was at GiveLively (https://www.givelively.org), a startup/foundation that builds payment integrations for non-profits and other charity-related apps and tools--they were also EnvKey's first beta customer.