Mandrill vs OneSignal Email

Two transactional email providers, compared on price, features and ratings, so you can pick fast.

Mandrill wins developer experience and sending APIsOneSignal Email wins price and reviews

Updated July 2026

At a glanceMandrillOneSignal Email
Entry price$20Free
Cost per 1k @ 100k$0.8$1.39
G2 rating4.24.7
Trustpilot1.62.6

THE VERDICT

Mandrill wins on developer experience and sending APIs. OneSignal Email wins on price and reviews.

Mandrill starts at $20 versus OneSignal Email's Free. OneSignal Email rates higher with developers (4.7 vs 4.2 on G2). Pick based on volume and team, and the scorecard below breaks down where each one leads.

Which should you choose?

Pick Mandrill

✓If you are a community, organization, or person who sends emails to multiple people and needs a quick fix.
✓It isn't for affiliate marketers.
✓Mandrill is a good option if you want easily accessible and detailed reports on your emails.
Set up Mandrill with Courier →

Pick OneSignal Email

✓You already use OneSignal for push or in-app and want to add email from the same dashboard
✓You want a free tier to start sending marketing or transactional email
✓You need to manage subscribers across push, in-app, and email in one place
✓You want a simple setup rather than a dedicated deliverability or template platform
Set up OneSignal Email with Courier →

Feature by feature

Winner cells are tinted, green where Mandrill leads, violet where OneSignal Email does.

capability
Mandrill
OneSignal Email
Starting paid plan
$20/mo
$19/mo
Cost per 1k @ 100k
$0.8
$1.39
Pricing model
Pay-as-you-go
Hybrid
Overage
Auto-purchase blocks or stop sending; no rollover
$1.50 / 1,000 sends
Dedicated IP
Add-on
Plan-gated
Deliverability tooling
Yes
Yes
Automated IP warmup
Yes
Yes
Suppression management
Yes
Yes
SPF / DKIM / DMARC
Yes
Yes
Transactional API
Yes
Yes
Marketing campaigns
No
Yes
SMTP relay
Yes
—
Inbound routing
Yes
—
Dynamic templates
Yes
Yes
Batch send
Yes
Yes
Scheduled send
Yes
Yes
Official SDKs
PHP, Python, Ruby, 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
No
—
Sandbox / test mode
Yes
—
Open / click tracking
Yes
Yes
Analytics dashboard
Yes
Yes
A/B testing
Yes
Yes
EU data residency
No
—
SOC 2
Yes
Yes
HIPAA
No
BAA
GDPR
Yes
Yes
ISO 27001
Yes
Yes
Support channels
Email, Chat
Email, Community
24/7 support
—
Yes
Support SLA
Plan-gated
Plan-gated

FAQ

Common questions

Mandrill starts at $20 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.

Keep comparing

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Why not both?

Use both behind one API.

Route Mandrill, OneSignal Email, or both, and switch providers without changing your code. Courier sits in front of every channel.

Start building freeRead the docs

Pricing, plans and feature availability as of July 2026 and may change. Ratings are aggregated from public review platforms. Mandrill is Mailchimp Transactional.

Multichannel Notifications Platform for SaaS