Customer.io vs HubSpot Email Marketing
Customer.io is a email marketing platform while HubSpot Email Marketing is a all-in-one marketing platform. HubSpot Email Marketing has been around since 2006, giving it a 6-year head start over Customer.io (founded 2012). HubSpot Email Marketing starts at $20/seat/mo versus $100/mo for Customer.io. HubSpot Email Marketing offers a free plan (2,000 emails/month), while Customer.io does not. HubSpot Email Marketing has the edge with landing pages, ecommerce integrations.
Quick Verdict
HubSpot Email Marketing wins on price, deliverability, integrations, free tier.
Best for most users: HubSpot Email Marketing (b2b).
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.
HubSpot Email Marketing
Email marketing powered by CRM data
HubSpot's email marketing is part of its complete Marketing Hub. While the free and Starter tiers offer competitive email marketing, the real power comes with Professional tier and above, where HubSpot's CRM data feeds into sophisticated automation and personalization.
Feature Comparison
| Feature | Customer.io | HubSpot Email Marketing |
|---|---|---|
| Rating | 4.4/5 | 4.4/5 |
| Starting Price | $100/mo | $20/mo |
| Free Plan | No free plan | 2,000 emails/month |
| Founded | 2012 | 2006 |
| Email Templates | 30 | 80 |
| Integrations | 150 | 1,500 |
| Deliverability Rate | 96% | 97% |
| 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
HubSpot Email Marketing: Pros & Cons
Pros
- +Best-in-class CRM integration
- +1,500+ integrations (largest ecosystem)
- +Powerful marketing automation
- +All-in-one marketing, sales, and service platform
- +Excellent analytics and attribution
Cons
- −Professional plan is very expensive ($890/mo)
- −Annual commitment required for higher tiers
- −Complex pricing structure
- −Steep learning curve
- −Email features alone don't justify the cost
The Verdict
Customer.io and HubSpot Email Marketing are closely matched — both score within 0.0 points of each other in our overall rating. Your decision should come down to specific needs rather than overall quality. On deliverability, HubSpot Email Marketing reports 97% compared to 96% for Customer.io — a meaningful difference if inbox placement is critical for your campaigns.
| Criterion | Weight | Customer.io | HubSpot Email Marketing |
|---|---|---|---|
| Starting Price | 30% | $100/mo | $20/mo |
| Deliverability | 25% | 96% | 97% |
| Rating | 25% | 4.4/5 | 4.4/5 |
| Integrations | 10% | 150 | 1500 |
| 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 HubSpot Email Marketing if…
- + You want lower starting costs ($20/mo)
- + You need a free plan to get started
- + You need ecommerce integrations
- + You need built-in landing pages