MailSlurp: Programmable Email and SMS API
MailSlurp helps software engineering and QA teams automate the testing of messaging workflows. It is designed for businesses that need to validate OTP, MFA, and notification flows.
At a glance
- Category
- Software Development
- Best for
- Software engineering teams, QA and automation engineers, Software companies, DevOps teams
- Pricing
- Plans start at $69 per month (billed annually), with a Growth plan at $249 per month and a free plan available. AI extraction is available as an add-on starting at $1 per 10,000 credits.
- Key use cases
- Authentication Flow Testing, Inbound Email Automation, MFA and SMS Verification, Email Content QA
- Integrations
- Zapier, Gmail inbox connection, Google Sheets
- Official website
- mailslurp.com
MailSlurp is a programmable messaging platform that allows developers to create and manage real email inboxes and phone numbers through code. It is designed for engineering and QA teams who need to automate the verification of inbound and outbound messages during the software development lifecycle.
The tool supports the automation of user journeys, such as sign-up flows, password resets, and multi-factor authentication (MFA). Teams can provision fresh identities for each test run to help reduce cross-run contamination and ensure messages land in the correct place.
Beyond testing, the platform provides tools for monitoring sender health and extracting structured data from emails using AI. Buyers should confirm their specific monthly volume and the level of team governance required, as features like audit logs and SAML SSO are available on the Enterprise plan.
Key Features
Create and control real email accounts and aliases via REST API, IMAP, or SMTP.
Provision regional phone numbers to send and receive SMS for verification workflows.
Uses OCR and LLMs to help transform unstructured email content and attachments into structured data like JSON.
Allows test suites to hold a connection until a specific expected email or SMS arrives.
Includes domain monitoring and campaign probes to track deliverability and sender posture.
Captures screenshots of how emails render across different email clients and devices.
Use Cases
Validating OTP, magic links, and password reset emails by extracting codes and links via API.
Turning inbound emails and attachments into structured operational data for downstream systems.
Using real phone numbers to capture and assert SMS verification codes in staging and CI environments.
Running email audits to check for broken links and missing images before a production send.
Best For
Integrations
Pricing
Plans start at $69 per month (billed annually), with a Growth plan at $249 per month and a free plan available. AI extraction is available as an add-on starting at $1 per 10,000 credits.
FAQ
It is used by engineering and QA teams to programmatically create email inboxes and phone numbers to automate the testing of signup, MFA, and notification workflows.
Yes, MailSlurp offers a free plan with a usage allowance for disposable inboxes, inbound email, and storage.
Yes, it uses AI transformers, OCR, and LLMs to turn unstructured email messages and attachments into structured data formats like JSON.
The Enterprise plan is designed for organizations that require SAML SSO, centralized identity controls, audit logs, and custom MSA/DPA terms.
Source category: Software Development
Source subcategory: Email API
