Seeking Inbox by Gmail Replacement

As you all are aware from my previous post, Google has announced that Inbox by Gmail is being killed off. Gmail is a great program, but it just doesn't fit the bill for me.
Inbox was a revolutionary change to not just managing your emails, but managing your life. You could hide bundles of emails until a certain time, snooze emails, create reminders, attach reminders to emails, and a whole lot more.

Some of these features have been ported over to the newly designed Gmail over the past few months, but not all of them, and most importantly, not the ones I need (and many others need) the most. These include the bundling of emails, sweeping of bundles, and reminders. Without these features, Gmail and just about any other email program, is not able to help me manage my digital communication.

That is why I am reaching out via my blog for everyone's help. I need either someone to create a proper replacement for Inbox by Gmail with the key features mentioned above, or help me find one that exists. I would love all of the readers of this post to share this with every single one of their followers, to widen then net.

In summary, here are the feature needed the most:

1. Bundles
2. Sweep capability of bundles
3. Reminders (integrated with Google Calendar, Assistant, Home)
4. Preferably free to low cost
5. Cross platform
6. Web and Mobile

Thanks to all that will help with this.