About MailSlurp
An API platform for testing email and SMS workflows. It allows developers to create programmable email addresses and phone numbers to test signups, notifications, and OTP flows. Features include device previews, email audits, and AI data extraction.
MailSlurp is a developer-focused API platform for testing and automating email and SMS-based workflows. It enables QA teams and developers to create disposable, programmable email inboxes and phone numbers to test user-facing features like sign-ups, password resets, and two-factor authentication. The platform's core functionality revolves around its REST API and extensive SDK library, supporting languages like JavaScript, Python, and Java. Key features include end-to-end testing automation, email quality assurance with device rendering previews and link auditing, and inbox placement tests. MailSlurp also offers advanced capabilities such as AI-powered data extraction from emails and automated message routing pipelines. Pricing is subscription-based with a free tier for exploration, and paid plans that scale with usage for features like external sending, team access, and custom domains. Support is available through documentation and a contact portal.
Pros & Cons
- Provides a comprehensive API and SDKs for numerous programming languages.
- Offers a free tier for developers to explore core functionalities.
- Supports both email and SMS testing, including OTP and MFA workflows.
- Includes advanced email quality tools like device rendering and inbox placement tests.
- Allows for the creation of unlimited inboxes with custom domains on paid plans.
- The free plan has significant limitations on monthly usage and features.
- Advanced features like email warm-up and premium device targets are restricted to higher-tier plans.
- Pricing can become complex with usage-based billing for certain features on top of the subscription fee.
Features
Key features
Create unlimited inboxes with custom domains, or use Gmail and Outlook accounts via API.
Provision real phone numbers to receive text messages and verification codes for testing.
Automate tests for user signup, password recovery, and notification flows using real email and SMS messages.
Preview emails on real devices, audit for broken links and accessibility issues, and test inbox placement.
Convert unstructured emails and attachments into structured data using AI models.
Automate workflows by routing messages, attachments, and replies to internal systems via webhooks.
Additional features
Capture one-time passcodes and magic links to complete authentication tests automatically.
Verify message delivery and timing under increasing traffic loads with integrations for k6, JMeter, and Locust.
Build sender reputation to improve inbox placement for new domains or accounts.
Track email authentication (SPF, DKIM, DMARC), DNS records, and overall sender health.
Attach your own domains to create private, branded email addresses for testing.
Receive real-time notifications for new emails, SMS messages, and attachments.
Programmatically manage inboxes, including creating, deleting, and fetching messages.
Access and download email attachments via the API for automated processing.
Provides a REST API and SDKs for multiple languages including JavaScript, Python, Java, and C#.
Pricing
Monthly plans
- 1 user
- 500 emails received / month
- 1,000 sandbox sends / month
- 1 device render / month
- 1 inbox placement test / month
- 1 user
- 1,000 emails received / month
- 100 test sends / month
- 5 device renders / month
- 3 inbox placement tests / month
- 1 user
- 5,000 emails received / month
- 500 external sends / month
- 10 device renders / month
- 10 inbox placement tests / month
- 1 warm-up sender included
- Custom domains and phone number access
- 2 users included
- 5,000 emails received / month
- 500 external sends / month
- 200 device renders / month
- 100 inbox placement tests / month
- 3 warm-up senders included
- 1 custom domain included
Contact sales for a custom quote.
Source: vendor pricing page →Countries & Languages
Interface languages
Billing currencies
No reviews yet
Be the first to drop a review
Alternatives to MailSlurp
Hoverfly Cloud
Hoverfly Cloud provides scalable API simulation and service virtualization enabling developers to test, mock, and…
Synatic Data Integration Platform
Synatic Data Integration Platform is a data integration software from Synatic that provides a comprehensive…
Synatic
Synatic is a unified platform from Synatic that enables the business to integrate and automate…
Stakpak
Stakpak is an open-source DevOps agent from Stakpak designed to help users secure, deploy, and…
.svg){kind=small}
Spot something wrong or outdated?
Suggest a correction — a reviewer verifies every change.
About MailSlurp
An API platform for testing email and SMS workflows. It allows developers to create programmable email addresses and phone numbers to test signups, notifications, and OTP flows. Features include device previews, email audits, and AI data extraction.
MailSlurp Details
MailSlurp's In-App Market Place
Does MailSlurp have an in-app market place?
Yes
How many Mini-Apps in the marketplace?
0
Mini Apps
Pricing Options
Plans
Monthly plans
- 1 user
- 500 emails received / month
- 1,000 sandbox sends / month
- 1 device render / month
- 1 inbox placement test / month
- 1 user
- 1,000 emails received / month
- 100 test sends / month
- 5 device renders / month
- 3 inbox placement tests / month
- 1 user
- 5,000 emails received / month
- 500 external sends / month
- 10 device renders / month
- 10 inbox placement tests / month
- 1 warm-up sender included
- Custom domains and phone number access
- 2 users included
- 5,000 emails received / month
- 500 external sends / month
- 200 device renders / month
- 100 inbox placement tests / month
- 3 warm-up senders included
- 1 custom domain included
Contact sales for a custom quote.
Source: vendor pricing page →Accepted Payment Currencies
USD, EUR
Pros & Cons
- Provides a comprehensive API and SDKs for numerous programming languages.
- Offers a free tier for developers to explore core functionalities.
- Supports both email and SMS testing, including OTP and MFA workflows.
- Includes advanced email quality tools like device rendering and inbox placement tests.
- Allows for the creation of unlimited inboxes with custom domains on paid plans.
- The free plan has significant limitations on monthly usage and features.
- Advanced features like email warm-up and premium device targets are restricted to higher-tier plans.
- Pricing can become complex with usage-based billing for certain features on top of the subscription fee.
MailSlurp's Support Options
Email Address
support@mailslurp.devDocumentation
https://www.mailslurp.com/docs/MailSlurp's Alternatives
Hoverfly Cloud
Hoverfly Cloud provides scalable API simulation and service virtualization enabling developers to test, mock, and…
Synatic Data Integration Platform
Synatic Data Integration Platform is a data integration software from Synatic that provides a comprehensive…
Synatic
Synatic is a unified platform from Synatic that enables the business to integrate and automate…
Stakpak
Stakpak is an open-source DevOps agent from Stakpak designed to help users secure, deploy, and…