Head-to-head
Customer.io vs Mailshake
Two leading email marketing tools, compared on pricing, features, and editorial fit. Updated for 2026.
At a glance
| Customer.io | Mailshake | |
|---|---|---|
| Tagline | Messaging that actually fits your data. | Sales engagement and cold email outreach software for B2B teams |
| Pricing model | Paid | Paid |
| Starts at | $100/mo | $29/mo |
| Founded | 2012 | — |
| AI-native | ||
| Categories | Email Marketing, Automation | Sales Engagement, Email Marketing, AI Writing & Content |
| Vendor claimed |
Quick take
Pick Customer.io if you need messaging that actually fits your data. Pick Mailshake if you need sales engagement and cold email outreach software for b2b teams.
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Customer.io alternatives →
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Frequently asked
- Is Customer.io better than Mailshake?
- It depends on your use case. Customer.io is messaging that actually fits your data, while Mailshake is sales engagement and cold email outreach software for b2b teams. See the comparison above for which fits your team.
- What's the price difference between Customer.io and Mailshake?
- Customer.io starts at $100/mo. Mailshake starts at $29/mo.
- Can I migrate from Customer.io to Mailshake?
- Most tools in this category support data import via CSV. For complex migrations, both vendors offer onboarding assistance on higher-tier plans.