Mailinator vs MailSlurp
Mailinator
mailinator.com
MailSlurp
mailslurp.comSide by side
| Figure | Mailinator | MailSlurp |
|---|---|---|
| Price from | $79/mo | $19.99/mo |
| Free plan | Yes | Yes |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | — | Yes |
| Android | Yes | Yes |
| API | Yes | Yes |
| Plans published | 13 | 9 |
| Spec score · Email Testing Software | 9.0 (#3) | 8.9 (#5) |
| Automation | The REST API supports inbox and message retrieval, SMS retrieval, message injection, and integration with CI/CD pipelines. | Webhooks, filtering rules, forwarding, automatic replies and attachment automations route and process messages. |
| Company | The pricing page says Mailinator is wholly owned and operated in the U.S.A., and the site footer identifies Manybrain, Inc. | MailSlurp identifies PettmanOU as its legal entity and lists its address in Saue, Estonia. |
| Email testing | Teams can test email delivery, OTP, MFA, onboarding, password recovery, and other email workflows at scale. | MailSlurp supports end-to-end tests for email, SMS, OTP and magic-link workflows with Playwright, Cypress, Selenium and backend tests. |
| Headquarters | Ann Arbor, Michigan, USA | Saue, Harjumaa, Estonia |
| Integrations | Inbound webhooks can accept HTTP POST messages from sources such as alert systems, Zapier, or Twilio and apply configured rules. | The integrations directory lists 79 items, including SDKs, Playwright, Cypress, Selenium, BrowserStack, Zapier, Power Automate, UiPath, Postman, GraphQL and webhooks. |
| Licence | The official Python SDK repository is released under the MIT license; Mailinator itself is delivered as a hosted service. | The hosted MailSlurp service is proprietary, while public official SDK repositories such as the TypeScript client are MIT licensed. |
| Rating on G2 | 4.6 out of 5 from 12 reviews | 2.0 out of 5 from 2 reviews |
| Rating on GetApp | 4.7 out of 5 from 142 reviews | 0 out of 5 from 0 reviews |
| Rating on TrustRadius | 8 out of 10 from 2 reviews | 0 out of 10 from 0 reviews and ratings |
| Security | Mailinator says web traffic is served over HTTPS, private system email bodies are encrypted at rest, and public system email is not encrypted. | The security policy says data at rest is encrypted with AES-256, data in transit uses TLS/SSL, and daily backups are stored in AWS S3. |
| Security controls | Mailinator states that traffic is HTTPS-only, servers are firewalled and Cloudflare-proxied, and production is separated from development and testing environments. | The security policy states TLS in transit, AES-256 encryption at rest, AWS RDS/S3 storage, daily backups, VPNs, network ACLs, penetration testing and RBAC. |
| Support | Documentation is available 24/7/365; the support page says public issue emails are usually answered within 24–72 hours and subscribers receive priority support. | The support page offers guides and direct contact for account, billing, delivery, and technical issues. |
| What it does | Mailinator provides public and private inboxes for automated email and SMS workflow testing, including sign-ups, 2FA and password resets. | MailSlurp provides programmable email addresses, phone numbers, messaging APIs and testing workflows for developers and QA teams. |
Plans
Mailinator
- Public - FreeFree
- Public - FreeFree
- Verified ProFree
- Verified ProFree
- Business$79 a month
- Business (annual)$79 a month
- Business$99 a month
- Business Plus$159 a month
- Business Plus (annual)$159 a month
- Business Plus$199 a month
MailSlurp
- FreeFree
- FreeFree
- Starter$19.99 a month
- Starter$19.99 a month
- Pro$49.99 a month
- Pro$49.99 a month
- Growth$129.99 a month
- Growth$129.99 a month
- EnterprisePriced on request
In their own words
Mailinator
Mailinator provides temporary inboxes and tools for testing email and SMS workflows. Developers, QA teams, and businesses can use it to check delivery for OTP, MFA, onboarding, password recovery, and other email processes at scale. Paid subscriptions include private testing domains, where messages can arrive at any address without creating an inbox first. The REST API retrieves inboxes, messages, and SMS, injects messages, and connects with CI/CD pipelines. Inbound webhooks can accept HTTP POST messages from sources such as alert systems, Zapier, or Twilio, then apply configured rules. SMS can be routed to an inbox or API for automated OTP and 2FA testing. The free public inboxes are readable by anyone, and messages typically auto-delete after several hours. Mailinator is receive-only: it cannot send email or fill out forms. The Public - Free plan is free to use without sign-up. Business costs $79 a month billed yearly; a two-week Business trial is listed. Other plans include Verified Pro at free, Business Plus at $159 a month billed yearly, and Enterprise at a price agreed with the maker with custom pricing.
MailSlurp
MailSlurp provides tools to build, test, and automate email and SMS workflows. Users can create temporary or permanent inboxes and handle messages through APIs, SDKs, SMTP, IMAP, and webhooks. It supports end-to-end tests for scenarios including OTP, MFA, magic links, and load testing, as well as device previews, email audits, and inbox placement checks. Pipelines can route messages and attachments using webhooks, forwarding, and automatic replies. AI extraction can turn emails and attachments such as PDFs and images into structured JSON using prompts, schemas, and OCR. Listed integrations include Playwright, Cypress, Selenium, HubSpot, Braze, Mailchimp, Zapier, and AI assistants through MCP. A REST API and official SDKs cover several programming languages. The free plan has capped allowances, including 500 received emails and 1,000 sandbox sends per month. Starter costs $19.99/mo; custom domains and phone numbers require Pro on Free and Starter plans. MailSlurp is web- and API-accessible.