Customer.io vs Mailmodo
Customer.io and Mailmodo are both popular choices in the email marketing platform space. Customer.io has been around since 2012, giving it a 8-year head start over Mailmodo (founded 2020). Mailmodo is the more affordable option at $49/mo — that's $51 less than Customer.io's $100/mo entry point. Mailmodo offers a free plan (Limited sending credits, 1 active journey, 500 active contacts per journey), while Customer.io does not. Customer.io stands out with SMS marketing, while Mailmodo offers ecommerce integrations.
Quick Verdict
Customer.io wins on deliverability, integrations.
Mailmodo wins on price, rating, free tier.
Best for most users: Mailmodo (marketers seeking higher engagement).
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.
Mailmodo
Interactive AMP email marketing with in-email forms and surveys
Mailmodo is the pioneering interactive email marketing platform that uses AMP technology to let recipients fill forms, take surveys, book meetings, and make purchases directly inside emails without clicking through to a landing page. With AI-powered template generation and a drag-and-drop editor, it makes interactive email creation accessible to marketers seeking 2-3x higher engagement rates, starting at $49/month.
Feature Comparison
| Feature | Customer.io | Mailmodo |
|---|---|---|
| Rating | 4.4/5 | 4.5/5 |
| Starting Price | $100/mo | $49/mo |
| Free Plan | No free plan | Limited sending credits, 1 active journey, 500 active contacts per journey |
| Founded | 2012 | 2020 |
| Email Templates | 30 | 100 |
| Integrations | 150 | 40 |
| Deliverability Rate | 96% | 95% |
| 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
Mailmodo: Pros & Cons
Pros
- +Interactive AMP emails allow recipients to fill forms, book meetings, and make purchases directly inside the email without leaving their inbox
- +Drag-and-drop editor with AI-powered template generation makes creating interactive emails accessible to non-technical marketers
- +Proven to increase engagement — interactive emails report 2-3x higher click rates than traditional HTML emails
- +AMP support extended to Apple Mail through innovative workarounds beyond just Gmail and Yahoo
- +21-day free trial gives ample time to test interactive email capabilities before committing
Cons
- −AMP email support is limited to Gmail, Yahoo, Mail.ru, and Apple Mail — Outlook and other clients fall back to HTML
- −Starting at $49/month for just 2,500 contacts makes it expensive compared to traditional email platforms
- −Relatively new platform (founded 2020) with a smaller feature set than established competitors
- −No SMS marketing or multichannel capabilities — email only
- −Learning curve for understanding AMP email limitations and designing for fallback HTML rendering
The Verdict
Customer.io and Mailmodo are closely matched — both score within 0.1 points of each other in our overall rating. Your decision should come down to specific needs rather than overall quality. On deliverability, Customer.io reports 96% compared to 95% for Mailmodo — a meaningful difference if inbox placement is critical for your campaigns.
| Criterion | Weight | Customer.io | Mailmodo |
|---|---|---|---|
| Starting Price | 30% | $100/mo | $49/mo |
| Deliverability | 25% | 96% | 95% |
| Rating | 25% | 4.4/5 | 4.5/5 |
| Integrations | 10% | 150 | 40 |
| Free Tier | 10% | No | Yes |
Weights determine how much each criterion counts toward the final score. See full methodology
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
Choose Mailmodo if…
- + You want lower starting costs ($49/mo)
- + You need a free plan to get started
- + You need ecommerce integrations
- + You're a marketers seeking higher engagement