~/email-for-developers providers ↗
← all SDKs
sdk · .net and c#

.NET and C# email SDKs

The major providers ship NuGet packages. Choice often comes down to existing Azure or AWS commitments.

.NET teams on Azure may favor providers with first-class Azure integration. AWS-resident teams default to SES.

what to evaluate

Considerations

Use these lenses when comparing the picks below.

  • NuGet package maintenance.
  • Azure Functions and AWS Lambda support.
  • Async/await patterns.
  • IConfiguration integration.

top picks

  1. 01

    Postmark

    Transactional

    Mature NuGet package with full feature coverage.

    100/mo developer plan · $15/mo for 10,000 emails
  2. 02

    Amazon SES

    Transactional

    AWS SDK for .NET; standard for AWS-hosted .NET apps.

    Up to $200 in AWS Free Tier credits for new accounts · $0.10 per 1,000 emails
  3. 03

    SendGrid

    Transactional Marketing

    Long-standing NuGet package.

    60-day free trial only (permanent free tier was removed May 2025) · $19.95/mo for 50,000 emails
also available

Other providers shipping a .NET and C# SDK

Brevo Transactional

All-in-one with a generous daily free tier.
Mailjet Transactional

European-focused, GDPR-friendly all-in-one.
Elastic Email Transactional

Low-cost email API and SMTP relay with marketing features nearby.
Knock Notifications

Notification infrastructure with workflow engine.
Novu Notifications

Open-source notification infrastructure.
Framework integrations →

reading this as developers picking email infrastructure

The question here is which one a backend engineer would rather operate. That means SDK depth in the language already in use, whether a retry can safely be replayed, how much the event log tells you when a customer says the email never arrived, and whether the pricing curve stays sane as volume grows.

Applied to .NET and C# SDKs, that means weighing developer experience, SDK breadth, idempotency keys, and operating track record ahead of the rest, against password resets, receipts, and magic links shipped from application code.