We have been running a few drip campaigns and frankly, it's a pain to do it manually.What tools do you guys have used / recommend?
We had a good experience with outreach.io , used it for sales process though. Did you check WebEngage ?
For simple and affordable drip campaigns, I highly recommend MailChimp(we used it at Hiree).
For large one-time campaigns, self-hosted Sendy.
Awesome but costly tools -Drip.co, Intercom, ConvertKit