7 Best Email Tools With HubSpot Integration (2026), Tested
Email platforms that can coexist with HubSpot as CRM while product and lifecycle messaging lives in a more specialized system.
criteria
- Contact and company synchronization
- Stable field mapping and ownership
- Webhook, automation, or API connectivity
- Suppression and consent reconciliation
- Clear division between CRM and product messaging
- 01
Customer.io
Marketing TransactionalA strong lifecycle layer beside HubSpot when product events and CRM records are joined through a warehouse or integration service.
- 02
Loops
Marketing TransactionalA focused SaaS messaging layer that can keep product email separate while HubSpot remains the sales system of record.
- 03
ActiveCampaign
MarketingDeep CRM and automation features, though overlap with HubSpot requires disciplined ownership rules.
- 04
Brevo
Transactional MarketingAffordable transactional and campaign capability with common integration paths for CRM contact data.
- 05
Mailchimp / Mandrill
Marketing TransactionalA mature connector ecosystem for marketing audiences, but less natural for product-triggered SaaS email.
- 06
Klaviyo
MarketingUseful when HubSpot holds CRM context and commerce behavior lives in Klaviyo.
- 07
MailerSend
TransactionalA clean transactional endpoint when HubSpot workflows or application code own the trigger logic.
All 7 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 |
| ActiveCampaign | Yes | Yes | 2003 | Yes | Tiers not published in comparable form | Yes |
| 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 |
| Klaviyo | Yes | Yes | 2012 | Yes | Tiers not published in comparable form | No |
| MailerSend | Yes | Yes | 2020 | Yes | Tiers not published in comparable form | Yes |
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 MailerSend. That differs from the headline order, which weighs all audiences together.