Marketing Transactional founded 2012
Customer.io
Behavior-driven lifecycle messaging.
overview
Customer.io is a workflow-first lifecycle platform: every send is rooted in events, attributes, and segments. Strong for B2B and SaaS lifecycle. The UI is more for operators than developers, but the data API is well-designed.
deliverability
Good; reputation managed at the workspace level with optional dedicated IPs.
best for
B2B SaaS teams running complex onboarding and lifecycle programs.
pros
- › Best-in-class behavioral targeting
- › Strong workflow editor
- › Multi-channel
cons
- › Expensive starting price
- › Overkill for pure transactional
- › Pricing scales with users
Features at a glance
| API | Yes |
| SMTP | No |
| SDKs | node, python, go, ruby, php, java |
| Webhooks | Yes |
| Templates | rich |
| React Email | No |
| Batch send | Yes |
| Scheduled send | Yes |
| Suppressions | Yes |
| Multi-tenant | Yes |
| Inbound parsing | No |
| Event stream | Yes |
| Idempotency keys | No |
| Dedicated IP | Yes |