Customer.io vs Mailjet
Compare Customer.io and Mailjet on features, pricing, and buyer fit using the same researched criteria.
Customer.io
Product-led event-driven messaging across email, push, SMS, and in-app — MAP-adjacent to classic ESPs.
Best for
- • Product-led teams sending event-driven multi-channel messages
- • SaaS/apps needing behavioral onboarding and lifecycle messaging
- • Teams comparing Braze-class engagement with a mid-market entry
Starting from $100.00/user/mo
No free plan
VS
Our verdict
There is no universal winner between Customer.io and Mailjet. Choose Customer.io when Product-led teams sending event-driven multi-channel messages. Choose Mailjet when EU/SMB teams needing marketing + transactional email in one vendor. Criterion scores come from approved SoftwareGlimpse editorial assessments and first-party research — not hands-on lab testing.
Customer.io is better for
- ✓ Automation
- ✓ Segmentation
- ✓ Analytics
- ✓ Integrations
Mailjet is better for
- ✓ Landing pages
Tie
- • Templates
Choose Customer.io if: Product-led teams sending event-driven multi-channel messages
Choose Mailjet if: EU/SMB teams needing marketing + transactional email in one vendor
Mailjet
EU-friendly email platform for marketing and transactional sending with send-volume pricing (Sinch).
Best for
- • EU/SMB teams needing marketing + transactional email in one vendor
- • Developers wanting API/SMTP alongside campaigns
- • Buyers comparing send-volume pricing vs contact-tier ESPs
Starting from $9.00/user/mo
Free plan available
Customer.io vs Mailjet at a glance
Criterion-level leaders from verified research.
Scorecard preview
Criterion leaders based on verified research — open the Scorecard tab for evidence detail.
- Starting pricingDepends
Customer.io
Mailjet
- Contact / subscriber limitsDepends
Customer.io
Mailjet
- Email send limitsDepends
Customer.io
Mailjet
- AutomationCustomer.io
Customer.io
Mailjet
- TemplatesTie
Customer.io
Mailjet
Which email marketing is better for you?
Quick picks based on fit — not a universal ranking.
- → Customer.io
Best for automation
Customer.io leads on automation (9/10 vs 7/10) from approved SoftwareGlimpse editorial assessments — not hands-on lab testing.
- → Customer.io
Best for segmentation
Customer.io leads on segmentation (8/10 vs 6/10) from approved SoftwareGlimpse editorial assessments — not hands-on lab testing.
- → Customer.io
Best for analytics
Customer.io leads on analytics (7/10 vs 6/10) from approved SoftwareGlimpse editorial assessments — not hands-on lab testing.
- → Mailjet
Best for landing pages
Stronger landing pages availability
The biggest differences
Where the products diverge most clearly on verified criteria.
Starting pricing
DependsCustomer.io
Customer.io researched starting price from $100/mo; Mailjet researched starting price from $9/mo; a free plan is researched. Contact-based packaging can change the real TCO.
Mailjet
Customer.io researched starting price from $100/mo; Mailjet researched starting price from $9/mo; a free plan is researched. Contact-based packaging can change the real TCO.
Automation
Customer.io winsCustomer.io
Customer.io leads on automation (9/10 vs 7/10) from approved SoftwareGlimpse editorial assessments — not hands-on lab testing.
Mailjet
Trails Customer.io on this criterion
Segmentation
Customer.io winsCustomer.io
Customer.io leads on segmentation (8/10 vs 6/10) from approved SoftwareGlimpse editorial assessments — not hands-on lab testing.
Mailjet
Trails Customer.io on this criterion
Analytics
Customer.io winsCustomer.io
Customer.io leads on analytics (7/10 vs 6/10) from approved SoftwareGlimpse editorial assessments — not hands-on lab testing.
Mailjet
Trails Customer.io on this criterion
Templates
TieCustomer.io
Customer.io and Mailjet are close on templates (7/10 vs 7/10) from approved SoftwareGlimpse editorial assessments — not hands-on lab testing.
Mailjet
Customer.io and Mailjet are close on templates (7/10 vs 7/10) from approved SoftwareGlimpse editorial assessments — not hands-on lab testing.
Which should you choose?
Choose Customer.io if
- Product-led teams sending event-driven multi-channel messages
- SaaS/apps needing behavioral onboarding and lifecycle messaging
- Teams comparing Braze-class engagement with a mid-market entry
Choose Mailjet if
- EU/SMB teams needing marketing + transactional email in one vendor
- Developers wanting API/SMTP alongside campaigns
- Buyers comparing send-volume pricing vs contact-tier ESPs
Related comparisons
Alternatives to consider
Braze
Enterprise B2C customer engagement platform for multi-channel messaging — custom / contact-sales pricing.
ActiveCampaign
Email marketing automation ESP with multi-step journeys; CRM pipelines strongest on Plus+; contact-based pricing.
Brevo
Multi-channel email marketing with send-based pricing, a generous free plan, and CRM-lite tools — formerly Sendinblue.
Klaviyo
Ecommerce email + SMS platform with Shopify-native flows, revenue attribution, and active-profile billing.
How we compare
A short look at the comparison process. Full methodology
1
Collect
Collect official product information, pricing, and product evidence.
2
Normalize
Map evidence to the same category evaluation criteria for both products.
3
Compare
Evaluate both products against identical criteria — ties and depends are allowed.
4
Explain
Show why each product wins, loses, or ties, with evidence behind the outcome.
Still deciding between Customer.io and Mailjet?
Use Best email marketing software for a shortlist matched to your priorities, or build another side-by-side comparison.
- Independent criterion outcomes
- No invented scores or prices
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