AWeber vs Customer.io
AWeber and Customer.io are both popular choices in the email marketing platform space. AWeber has been around since 1998, giving it a 14-year head start over Customer.io (founded 2012). AWeber is the more affordable option at $15/mo — that's $85 less than Customer.io's $100/mo entry point. AWeber offers a free plan (500 subscribers), while Customer.io does not. AWeber stands out with landing pages and ecommerce integrations, while Customer.io offers SMS marketing.
Quick Verdict
AWeber wins on price, deliverability, integrations, free tier.
Customer.io wins on rating.
Best for most users: AWeber (small businesses).
AWeber
Powerfully simple email marketing
AWeber is one of the original email marketing platforms, serving small businesses since 1998. It offers the largest template library (600+) and an impressive integration ecosystem. While its automation isn't as advanced as newer competitors, its reliability and excellent affiliate program make it a solid choice.
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.
Feature Comparison
| Feature | AWeber | Customer.io |
|---|---|---|
| Rating | 4.2/5 | 4.4/5 |
| Starting Price | $15/mo | $100/mo |
| Free Plan | 500 subscribers | No free plan |
| Founded | 1998 | 2012 |
| Email Templates | 600 | 30 |
| Integrations | 750 | 150 |
| Deliverability Rate | 97.8% | 96% |
| 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 | ✓ | ✓ |
AWeber: Pros & Cons
Pros
- +600+ email templates (largest library)
- +750+ integrations
- +Established and reliable (since 1998)
- +Free plan available
- +Excellent affiliate program (up to 50% recurring)
Cons
- −Interface feels dated compared to newer tools
- −Automation capabilities lag behind competitors
- −Free plan is limited
- −Lite plan restricts automations to 3
- −No SMS marketing
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
The Verdict
Customer.io edges ahead with a 4.4/5 rating compared to AWeber's 4.2/5. The gap comes mainly from deliverability (4.4 vs 4) and feature depth (4.6 vs 4.3). On deliverability, AWeber reports 97.8% compared to 96% for Customer.io — a meaningful difference if inbox placement is critical for your campaigns.
| Criterion | Weight | AWeber | Customer.io |
|---|---|---|---|
| Starting Price | 30% | $15/mo | $100/mo |
| Deliverability | 25% | 97.8% | 96% |
| Rating | 25% | 4.2/5 | 4.4/5 |
| Integrations | 10% | 750 | 150 |
| Free Tier | 10% | Yes | No |
Weights determine how much each criterion counts toward the final score. See full methodology
Choose AWeber if…
- + You want lower starting costs ($15/mo)
- + You need a free plan to get started
- + You need ecommerce integrations
- + You need built-in landing pages
Choose Customer.io if…
- + You need SMS marketing
- + 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