SendiventvsCustomer.io

Campaign builders vs clean APIs

Customer.io is built for marketers who think in campaigns: visual workflow builders, drag-and-drop segmentation, A/B testing dashboards. It's a powerful tool — for the right team.

Sendivent is built for developers who think in events: user.signup triggers a welcome email, payment.failed triggers SMS + email. No campaign builder to learn, no visual workflows to maintain.

The question: Who owns your notifications? If it's marketing, Customer.io makes sense. If it's engineering, Sendivent is simpler.

Marketing automation vs product notifications

Customer.io excels at:

• Onboarding email sequences
• Re-engagement campaigns
• Behavioral segmentation
• Marketing experiments

Sendivent excels at:

• Order confirmations and receipts
• Password reset and security alerts
• Team notifications via Slack
• Real-time transactional updates

If your messages are triggered by product events (user actions, system events), Sendivent is simpler. If you need complex marketing workflows, Customer.io is more capable.

Developer experience

Customer.io's approach:

• Visual workflow builder
• Point-and-click campaign creation
• JavaScript SDK for tracking
• Marketers can self-serve

Sendivent's approach:

• Clean REST API
• Event-based triggers from your backend
• Notification templates managed in dashboard
• Multi-language support built-in
• Developers stay in control

Pricing comparison

Customer.io starts at $100/month for their Essentials plan, with pricing based on profile count. Enterprise features require their Premium plan.

Sendivent charges per person notified, starting with a free tier of 1,000 people/month. You pay for active users, not stored profiles.

When to use each

Choose Customer.io if your marketing team needs to build and iterate on campaigns without engineering support, or if you need advanced segmentation and A/B testing.

Choose Sendivent if you're building product notifications that engineers control, want a simpler API, or prefer a focused tool over a full marketing automation platform.

Bottom line

Customer.io is a marketing platform that happens to have an API. Sendivent is a developer tool that happens to have a dashboard. Choose based on who owns your messaging: marketing or engineering.

Developers owning notifications? Create a free account and skip the campaign builder. Emit events, we deliver notifications. Clean API, no visual workflows required.