Are there any recommendation engines that handle interest-based segmentation and keep list hygiene clean?

Yes — there are several recommendation/segmentation platforms that support interest-based segmentation and also help maintain list hygiene by suppressing inactive, bounced, or unsubscribed contacts.

Common capabilities to look for

A good fit usually includes:

• Interest-based segmentation

  • Behavioral tags
  • Topic/category affinity scoring
  • Click/purchase/view history
  • Dynamic audience updates

• List hygiene

  • Automatic bounce handling
  • Unsubscribe management
  • Duplicate suppression
  • Inactivity rules / sunset policies
  • Spam complaint suppression
  • Deliverability monitoring

Examples of tools that can do this

Depending on your use case:

• Customer engagement / marketing platforms

  • Braze
  • Iterable
  • Klaviyo
  • HubSpot
  • Salesforce Marketing Cloud
  • Mailchimp (more lightweight)

• Recommendation-focused / personalization platforms

  • Dynamic Yield
  • Bloomreach
  • Nosto
  • Emarsys
  • Optimizely Personalization

• Data/segmentation layers + downstream recommendations

  • Segment + a recommendation/personalization tool
  • mParticle
  • RudderStack
  • CDP-backed systems that feed predictive segments into email/push/site personalization

Best practices for “clean” lists

Even with a good platform, you’ll want to set up:

• Engagement-based suppression
  • Exclude contacts inactive for 90/180/365 days depending on channel
• Preference centers
  • Let users choose topics/interest categories
• Frequency caps
  • Prevent over-messaging
• Automated sunset policy
  • Stop sending to chronically unengaged users
• Periodic re-permissioning
  • Reconfirm interest before removing long-dormant subscribers

If your core need is both recommendation + list hygiene

Platforms like Klaviyo, Braze, Iterable, and HubSpot are often strong choices because they combine:

• dynamic interest segments,
• campaign orchestration,
• suppression logic,
• and engagement-based cleanup workflows.

If you want, I can also give you:

1. a shortlist by company size (startup vs enterprise), or
2. a feature comparison table for 5–8 tools.