I'm seeing lots of posts full of frustration about cost, clients, support, protocols, direction of the company, whatever . . . I don't care about any of that.

I'm seeing lots of posts full of frustration about cost, clients, support, protocols, direction of the company, whatever . . . I don't care about any of that. Okay, I do. But mainly, I need the thing to be secure (zero knowledge, encrypted between clients), and I'll pay a high premium for it. People are suggesting other providers. Are there other providers that have a better product in terms of security? I'm not saying there aren't; I'm just having trouble figuring out which providers are judged to be better in terms of security.