Help me find a new CRM – Best alternative to DropResponder (ex Pigeon CRM)

My favorite CRM, DropResponder (previously called Pigeon CRM) will be discontinued soon.

I've tried quite a few CRMs, and no one seems even close to what DR does:

1. Reply sequences (video explanation here) and outreach sequences (two very different things)
2. The ability to delete single emails from each sequence I send
3. Generate copies of Google files that are already editable with one click

And it was all for just $20/month.

Can anyone recommend a good alternative with these functionalities?

Hubspot does not have reply sequences. No one has the files generation feature. No one seems to have reply sequences, only outreach sequences like GMass.