8 Best Email Tools With Segmentation (2026), Tested
Tools for building durable SaaS segments from product behavior, profile data, account state, and messaging history.
criteria
- Real-time behavioral segments
- Account and user attributes
- Segment reuse across journeys and broadcasts
- Exclusion and suppression logic
- Clarity when segment membership changes
- 01
Customer.io
Marketing TransactionalPowerful data-driven segments and journey logic for teams that can support the required data model.
- 02
Loops
Marketing TransactionalSaaS-oriented audiences combine contact properties and product events without a large implementation burden.
- 03
Klaviyo
MarketingExceptionally deep segmentation for commerce behavior, profiles, and purchase history.
- 04
Userlist
MarketingCompany-aware segmentation is a real advantage for B2B products with account-level lifecycle states.
- 05
ActiveCampaign
MarketingBroad contact, CRM, and automation segmentation, balanced against a more complex interface.
- 06
Encharge
MarketingAccessible behavioral segmentation and flow branching for product-led growth teams.
- 07
Brevo
Transactional MarketingGood value for contact and engagement segments, with less depth for complex product event models.
- 08
Mailchimp / Mandrill
Marketing TransactionalMature audience filters and broad integrations, but weaker alignment with real-time SaaS product behavior.
All 8 compared
Every provider in this ranking against the priorities growth and lifecycle teams weigh. Free tier and entry price sit with each pick above.
| Provider | Scheduling | Event stream | Operating since | Suppressions API | Best published rate per 1,000 | Multi-tenant |
|---|---|---|---|---|---|---|
| Customer.io | Yes | Yes | 2012 | Yes | Tiers not published in comparable form | Yes |
| Loops | Yes | Yes | 2022 | Yes | Tiers not published in comparable form | No |
| Klaviyo | Yes | Yes | 2012 | Yes | Tiers not published in comparable form | No |
| Userlist | Yes | Yes | 2017 | Yes | Tiers not published in comparable form | No |
| ActiveCampaign | Yes | Yes | 2003 | Yes | Tiers not published in comparable form | Yes |
| Encharge | Yes | Yes | Not published | Yes | Tiers not published in comparable form | No |
| Brevo | Yes | Yes | 2012 | Yes | Tiers not published in comparable form | No |
| Mailchimp / Mandrill | Yes | Yes | Not published | Yes | Tiers not published in comparable form | No |
If you are growth and lifecycle teams
Growth work lives or dies on targeting and measurement. What matters is whether behavioral triggers can be built without engineering time, whether the event stream supports attribution past the open, and whether deliverability holds when broadcast volume shares a reputation with product email.
The order above is the general editorial ranking. Re-sorted against scheduling, event stream, and operating track record, the shortlist for behavior-triggered journeys, broadcasts, and winback campaigns measured on revenue becomes Customer.io, ActiveCampaign, and Loops. That differs from the headline order, which weighs all audiences together.