We segment users based on key actions and traits using Mixpanel. Then I write a bunch of email sequences in Intercom for each segment. It's a ton of upfront work but pays off big time in higher engagement and conversions. I'd love to find a way to automate more of it with AI though if anyone has tips!
I built an in house tools with api from posthog + claude doing what you have just described, it works like charm (in terms of functionality of what I wanted to achieve), but I also don't believe that level of personalization matters that much when you don't yet have a lot of active users! may open source it someday though!
I'm using Metabase + Posthog for user segmentation and marketing automation. Works pretty well so far, but agreed that personalization doesn't matter as much early on. Focus on nailing your core value prop first!