MailSlurp logo

SendGrid alternatives that connect sending and testing.

Choose MailSlurp for programmable inboxes, inbound workflows and end-to-end email checks. Bring the delivered message into the same review as the send.

Envelope and custom-domain email address symbols

Trusted by teams at

  • Broadcom
  • Scraper
  • Trivago
  • Avast
  • Wolt
  • Panasonic
  • Broadcom
  • Scraper
  • Trivago
  • Avast
  • Wolt
  • Panasonic

Give every workflow an address of its own.

Create real email addresses in the dashboard or through the API. Receive replies, inspect messages and organize inboxes around your customers, applications and test environments.

Use MailSlurp domains or connect your own domain. Choose inbox lifetimes and retention settings to suit the workflow.

Explore programmable email
Separate envelope symbols for programmable inboxes
Envelope, domain globe and address symbol

Send and receive

Work with outbound email and inbound replies through the same inbox APIs.

Illustration of a webhook request with a JSON payload

React to incoming messages

Use webhooks to notify your app when an email arrives, then retrieve its content and attachments.

HTML and .eml files representing received message content

Inspect what was delivered

Open the received message, headers and raw content when a workflow needs debugging.

Keep the received message within reach.

Look beyond the send event. Open an email in the dashboard, inspect its final content and use the API to retrieve the fields your application needs.

For invoices, orders and support messages, add AI extraction to turn email and attachment content into structured records.

Turn incoming email into data
Email and attachment symbols alongside structured data

Test the send before your customers depend on it.

Pair your email workflow with inbox placement testing, domain checks and device previews. Check where a test lands and how the message looks before releasing a new template or changing a sending service.

Check inbox placement
Gmail, Outlook and Yahoo email placement illustration

How to bring a workflow into MailSlurp

Create an inbox and connect your app

Start with an address in the dashboard, then use the MailSlurp API and SDK guides to create and manage inboxes from your application.

Send a representative message

Test the confirmation, receipt or reply your app depends on. Inspect the delivered email and verify any domain settings required for your sending path. Plans show the current sending allowances.

Automate the next action

Configure a webhook or wait for the expected email through the API. Check the content, extract the data you need and continue the workflow with a repeatable test.

Look at what happens after the send request.

Follow the message and its reply

An order confirmation needs more than an accepted send. Receive it in a controlled inbox, inspect its content and follow its links. MailSlurp brings those checks together with inbox APIs and webhooks.

Evaluate the complete transactional message

Use your current transactional email as the evaluation case. Send it to MailSlurp, confirm the expected data and test its appearance. You can then decide which sending and inbound workflows to move into MailSlurp and which existing integrations to keep.

Questions before you switch?

How should I compare SendGrid alternatives for a transactional email?

Start with an order confirmation that includes a receipt, a link and a reply address. In MailSlurp, receive the final message, check the attachment and follow the link in your application. Then send a reply and verify that your webhook receives the event. This tests the full customer interaction alongside the sending API. Follow the sending and receiving guide.

Can I receive replies and attachments?

Yes. Create an inbox, receive email and retrieve its content, headers and attachments through the API. Use webhooks when your application needs to react to incoming messages.

How do I evaluate a migration?

Map your existing send requests, inbound routes and event handling. Try one complete workflow with a representative message and reply, check domain configuration and current plan allowances, then expand after the first flow works.

Bring your next email workflow into MailSlurp.

Start with an inbox, a real message and the next action your app needs.

Email previews across mobile and desktop clients