Overview

Mailjet and Amazon SES represent opposite ends of the email spectrum. Mailjet is a complete platform with marketing, transactional, and visual tools. Amazon SES is raw infrastructure at rock-bottom prices. The choice comes down to ease of use vs cost at scale.

The Price Difference

Amazon SES costs $0.10 per 1,000 emails. That's it. No platform fees, no markup.

At 100,000 emails/month:

• Amazon SES: ~$10
• Mailjet: ~$85-100

At 1 million emails/month, SES costs roughly $100 while Mailjet would cost significantly more. For pure volume, SES is unbeatable on price.

The Complexity Cost

SES's low price comes with hidden costs: engineering time.

Setting up SES requires:

• AWS account configuration
• DNS verification (SPF, DKIM, DMARC)
• IAM policies for API access
• SNS queues for bounce/complaint handling
• IP warmup for new accounts
• Ongoing deliverability management

Mailjet handles all this automatically. For non-technical teams, Mailjet is the only realistic option.

Marketing vs Infrastructure

Mailjet has marketing features: campaigns, automation, Passport editor, A/B testing.

SES has zero marketing features. It sends emails. That's all. If you need marketing capabilities, SES requires pairing with another tool.

When SES Makes Sense

SES is right when:

• You send millions of emails monthly
• You have engineering resources for email infrastructure
• You're already on AWS
• Cost is the primary concern
• You only need transactional email

For most companies, especially those without dedicated email engineers, managed platforms like Mailjet save more in time than they cost in price.

For SaaS Companies

Mailjet offers more than SES but is still general-purpose. SES is pure infrastructure.

If you're SaaS with Stripe billing, consider Sequenzy. We offer managed email infrastructure with native Stripe integration and SaaS-specific automation. No AWS complexity, no building marketing features yourself.

Making the Choice

Choose Mailjet for a complete, user-friendly email platform. Choose Amazon SES for maximum volume at minimum cost if you have engineering resources. For SaaS with Stripe, consider Sequenzy.

The True Cost Equation

Amazon SES at $10 for 100,000 emails versus Mailjet at $85-100 looks like a clear winner. But that comparison ignores engineering time. Setting up SNS for bounces, Lambda for webhooks, CloudWatch for monitoring, and managing IP warmup and reputation takes 40-80 hours of engineering time initially, plus ongoing maintenance.

At typical engineering rates, the initial SES setup costs more than a year of Mailjet. The question is whether your team has that expertise already or needs to acquire it. For teams already deep in AWS, the marginal cost is low. For everyone else, Mailjet's managed approach saves real money.

Marketing Features as a Differentiator

SES has exactly zero marketing features. No campaign builder, no automation, no contact management, no templates. If you need to send a newsletter alongside transactional emails, SES requires a completely separate marketing platform.

Mailjet bundles marketing campaigns, visual builder with collaboration, automation workflows, and contact management with transactional email. For businesses needing both email types, Mailjet eliminates the need for a second platform entirely.

When SES Becomes the Right Choice

SES makes financial sense when three conditions are met: your team has AWS expertise, your monthly volume exceeds 500,000 emails, and you only need transactional delivery. Below those thresholds, the engineering investment rarely pays for itself.

For SaaS companies at moderate volume, the managed approach of Mailjet or Sequenzy is almost always more cost-effective when accounting for total cost of ownership including developer time and opportunity cost.

Delivery Speed and Reliability

For transactional email, delivery speed is non-negotiable. Receipts, password resets, and verification codes need to arrive in seconds. Both Mailjet and Amazon SES prioritize fast delivery, but their approaches differ in infrastructure and routing.

Transactional email reliability involves more than just speed. It requires consistent inbox placement, proper authentication, and monitoring. Compare how each platform handles DKIM, SPF, and DMARC setup, and which provides better tools for ongoing email deliverability monitoring.

API Design and Developer Experience

Mailjet and Amazon SES both target developers, but with different philosophies. The quality of API documentation, SDK support, and error handling directly impacts how quickly your team can integrate and how much ongoing maintenance is needed.

Developer experience goes beyond the API itself. Consider webhook support for tracking delivery events, sandbox environments for testing, and how each platform handles rate limiting and error recovery. These details matter when your application depends on email delivery.

Scaling and Cost at Volume

Email costs become significant at scale. What starts as a few hundred emails per day can grow to millions. Understanding how Mailjet and Amazon SES price at different volume tiers helps you plan for growth without budget surprises.

Beyond per-email pricing, consider dedicated IP costs, email validation charges, and support tier pricing. Some platforms offer volume discounts that significantly change the economics at higher sending volumes. For SaaS companies needing both transactional and marketing email, explore Sequenzy's unified approach.