Head-to-head
Customer.io vs Email Tracker
Two leading email marketing tools, compared on pricing, features, and editorial fit. Updated for 2026.
Email Tracker
Free Gmail extension that tracks email opens and link clicks
From Free
Visit Email TrackerAt a glance
| Customer.io | Email Tracker | |
|---|---|---|
| Tagline | Messaging that actually fits your data. | Free Gmail extension that tracks email opens and link clicks |
| Pricing model | Paid | Freemium |
| Starts at | $100/mo | Free |
| Founded | 2012 | — |
| AI-native | ||
| Categories | Email Marketing, Automation | Sales Engagement, Email Marketing |
| Vendor claimed |
Quick take
Pick Customer.io if you need messaging that actually fits your data. Pick Email Tracker if you need free gmail extension that tracks email opens and link clicks.
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Customer.io alternatives →
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Email Tracker alternatives →
Frequently asked
- Is Customer.io better than Email Tracker?
- It depends on your use case. Customer.io is messaging that actually fits your data, while Email Tracker is free gmail extension that tracks email opens and link clicks. See the comparison above for which fits your team.
- What's the price difference between Customer.io and Email Tracker?
- Customer.io starts at $100/mo. Email Tracker starts at Free.
- Can I migrate from Customer.io to Email Tracker?
- Most tools in this category support data import via CSV. For complex migrations, both vendors offer onboarding assistance on higher-tier plans.