Two transactional email providers, compared on price, features and ratings, so you can pick fast.
Mailjet wins developer experience and sending APIsOneSignal Email wins deliverability and support
Updated July 2026
At a glanceMailjetOneSignal Email
Entry priceFreeFree
Cost per 1k @ 100k—$1.39
Free tier6,000/mo10,000/mo
G2 rating3.94.7
THE VERDICT
Mailjet wins on developer experience and sending APIs. OneSignal Email wins on deliverability and support.
Mailjet starts at Free versus OneSignal Email's Free. OneSignal Email rates higher with developers (4.7 vs 3.9 on G2). Pick based on volume and team, and the scorecard below breaks down where each one leads.
Which should you choose?
Pick Mailjet
✓You want email marketing and transactional sending in one affordable platform
✓Your team needs real-time collaborative template editing
✓You want an EU-based, GDPR-first email provider
✓You are a startup or small team integrating email into your product
Winner cells are tinted, green where Mailjet leads, violet where OneSignal Email does.
capability
Mailjet
OneSignal Email
Pricing
Starting paid plan
$9/mo
$19/mo
Cost per 1k @ 100k
—
$1.39
Pricing model
Subscription
Hybrid
Overage
—
$1.50 / 1,000 sends
Deliverability
Dedicated IP
Plan-gated
Plan-gated
Deliverability tooling
Yes
Yes
Automated IP warmup
—
Yes
Suppression management
Yes
Yes
SPF / DKIM / DMARC
Yes
Yes
API & sending
Transactional API
Yes
Yes
Marketing campaigns
Yes
Yes
SMTP relay
Yes
—
Inbound routing
Yes
—
Dynamic templates
Yes
Yes
Batch send
Yes
Yes
Scheduled send
Yes
Yes
Developer experience
Official SDKs
PHP, Ruby, Python, C#/.NET, Java, Node.js
Node.js, Python, Java, Go, PHP, Ruby, C#, Rust
Event webhooks
Yes
Yes
Drag-and-drop editor
Yes
Yes
Custom HTML editor
Yes
Yes
Email validation
Plan-gated
—
Sandbox / test mode
Yes
—
Analytics
Open / click tracking
Yes
Yes
Analytics dashboard
Yes
Yes
A/B testing
Yes
Yes
Compliance
EU data residency
Yes
—
SOC 2
Yes
Yes
HIPAA
No
BAA
GDPR
Yes
Yes
ISO 27001
Yes
Yes
Support
Support channels
Email/ticket, Chat, Phone
Email, Community
24/7 support
—
Yes
Support SLA
Plan-gated
Plan-gated
FAQ
Common questions
Mailjet starts at Free versus OneSignal Email's Free. Because pricing models differ by tier, the cheaper option depends on your monthly volume, so compare the pricing rows in the scorecard above.
Pricing, plans and feature availability as of July 2026 and may change. Ratings are aggregated from public review platforms. Mailjet is a Sinch product.