Customer.io vs Omnisend
Customer.io and Omnisend are both popular choices in the email marketing platform space. Omnisend is the more affordable option at $16/mo — that's $84 less per month than Customer.io's $100/mo entry point. Omnisend offers a free plan (250 subscribers), while Customer.io does not. Omnisend has the edge with landing pages, ecommerce integrations.
Quick Verdict
Customer.io wins on integrations.
Omnisend wins on price, deliverability, rating, free tier.
Best for most users: Omnisend (ecommerce).
Customer.io
Behavioral messaging platform for product-led SaaS and tech companies
Customer.io is a behavioral messaging platform built for product-led SaaS companies that need to trigger automated emails, SMS, push notifications, and in-app messages based on real-time user events. Its visual workflow builder and Liquid templating provide deep personalization, while the built-in Data Pipelines act as a lightweight CDP. Trusted by 8,000+ companies including Notion and Segment, it starts at $100/month for 5,000 profiles.
Omnisend
Ecommerce email and SMS made easy
Omnisend is an ecommerce-focused marketing platform that combines email, SMS, and web push notifications. It offers pre-built automation workflows for common ecommerce scenarios like cart abandonment, order confirmation, and product recommendations.
Feature Comparison
| Feature | Customer.io | Omnisend |
|---|---|---|
| Rating | 4.4/5 | 4.6/5 |
| Starting Price | $100/mo | $16/mo |
| Free Plan | No free plan | 250 subscribers |
| Founded | 2012 | 2014 |
| Email Templates | 30 | 130 |
| Integrations | 150 | 130 |
| Deliverability Rate | 96% | 98.5% |
| Marketing Automation | ✓ | ✓ |
| A/B Testing | ✓ | ✓ |
| Landing Pages | ✕ | ✓ |
| Segmentation | ✓ | ✓ |
| Drag & Drop Editor | ✓ | ✓ |
| SMS Marketing | ✓ | ✓ |
| Ecommerce Features | ✕ | ✓ |
| API Access | ✓ | ✓ |
| Multi-Language | ✓ | ✓ |
| Web Push Notifications | ✓ | ✓ |
| Live Chat | ✕ | ✓ |
| Advanced Analytics | ✓ | ✓ |
Customer.io: Pros & Cons
Pros
- +Powerful visual workflow builder with real-time event-based triggers for behavioral automation
- +Omnichannel messaging across email, SMS, push notifications, in-app, and webhooks in one platform
- +Built-in Data Pipelines that serve as a lightweight CDP, unifying web, mobile, and backend data
- +Segment builder is intuitive enough for marketers without requiring dedicated engineering support
- +Startup Program offers up to 12 months free for qualifying early-stage companies
Cons
- −Essentials plan starts at $100/month for only 5,000 profiles — expensive for small teams
- −Steep learning curve for non-technical users, especially with Liquid templating syntax
- −Pricing scales aggressively past 10K profiles with significant jumps between plan tiers
- −Template editor feels restrictive for highly custom-coded email layouts
- −Searching for past messages and editing templates can be unintuitive and slow
Omnisend: Pros & Cons
Pros
- +Purpose-built for ecommerce
- +Pre-built automation workflows for common ecommerce flows
- +SMS, email, and web push in one platform
- +Easy Shopify and WooCommerce integration
- +Good free plan for small stores
Cons
- −Not suitable for non-ecommerce use cases
- −Free plan very limited (250 contacts)
- −Gets pricey at higher subscriber counts
- −Fewer general integrations than Mailchimp
- −Limited blog/content marketing features
The Verdict
Customer.io and Omnisend are closely matched — both score within 0.2 points of each other in our overall rating. Your decision should come down to specific needs rather than overall quality. On deliverability, Omnisend reports 98.5% compared to 96% for Customer.io — a meaningful difference if inbox placement is critical for your campaigns.
| Criterion | Weight | Customer.io | Omnisend |
|---|---|---|---|
| Starting Price | 30% | $100/mo | $16/mo |
| Deliverability | 25% | 96% | 98.5% |
| Rating | 25% | 4.4/5 | 4.6/5 |
| Integrations | 10% | 150 | 130 |
| Free Tier | 10% | No | Yes |
Weights determine how much each criterion counts toward the final score. See full methodology
Choose Customer.io if…
- + You're a product led saas companies with event driven messaging needs
- + You're a technical marketing teams that want advanced automation with liquid logic
- + Powerful visual workflow builder with real-time event-based triggers for behavioral automation
Choose Omnisend if…
- + You want lower starting costs ($16/mo)
- + You need a free plan to get started
- + You need ecommerce integrations
- + You need built-in landing pages