SendGrid vs Mailgun vs Amazon SES

SendGrid, Mailgun, and Amazon SES can all send email at serious scale. The question is not which provider is universally best. The question is which provider fits your sending type, technical comfort, reporting needs, and deliverability controls.

SendGrid

SendGrid is often approachable for teams that want a managed interface, templates, lists, event webhooks, and campaign-style workflows. It can be a good fit when marketing and transactional email need to stay relatively accessible to non-engineers.

The tradeoff is that account health, suppression handling, sender identity, and template management still need care. A friendly UI does not remove deliverability responsibility.

Mailgun

Mailgun is developer-friendly and strong for domain-based sending, APIs, routing, logs, validation, and event handling. It is often a good fit for teams building custom email workflows or product-triggered messaging.

The tradeoff is that campaign management and content operations may need to be built or connected elsewhere.

Amazon SES

Amazon SES can be cost-effective and reliable for technical teams comfortable with AWS. It is especially useful when sending is already part of a broader AWS system.

The tradeoff is setup complexity. DNS, identities, configuration sets, feedback handling, bounces, complaints, suppression, and dashboards require more operational discipline.

Which one I would choose

Choose SendGrid if the business wants a more approachable email platform with templates, marketing-campaign features, event webhooks, and a familiar dashboard. It is a reasonable first choice when a non-engineer still needs to participate in the email process.

Choose Mailgun if the business or product needs API-first sending, domain-level control, logs, routing, and developer-friendly event handling. I like it for custom platforms, product emails, and businesses that want to own the workflow around sending.

Choose Amazon SES if cost and scale matter, and someone technical can own AWS setup, DNS, bounces, complaints, configuration sets, and monitoring. SES can be excellent, but it is not the lowest-friction option.

Choose none of them yet if the list source is unclear, DNS is not ready, unsubscribe handling is missing, or no one is watching bounces and complaints. The provider will not save a bad sending process.

My take

For a simple business sending setup, start with the provider your team can configure correctly and monitor consistently. For a platform like Resonance, support all three, normalize the events, and route sends based on DNS readiness, provider health, bounce risk, complaint risk, and recipient domain behavior.

Deliverability is not solved at vendor selection. It is solved in the daily operating rhythm after that.