# Litmus vs MailSlurp

**Leader by vioscaleAI score:** MailSlurp

| Attribute | Litmus | MailSlurp |
|---|---|---|
| **vioscaleAI score** | 43.7 (26% (low)) | 52.3 (54% (medium)) |
| content.faq | `[{"answer":"Platform for previewing and testing emails across multiple clients, designing and sharing email templates, integrating with email service providers, and analyzing performance to ensure optimal delivery. It is indexed under Email Testing Dev.","source":"https://www.litmus.com","question":"What is Litmus?","confidence":0.6},{"answer":"We have confirmed browser-based access to Litmus. That is the extent of what we could verify from public sources, so it may well offer desktop or mobile clients we have not indexed.","source":"https://www.litmus.com","question":"What platforms does Litmus support?","confidence":0.6},{"answer":"We have only confirmed a cloud / SaaS deployment for Litmus, so it appears to be vendor-hosted. If a self-hosted option exists we have not found it documented publicly.","source":"https://www.litmus.com","question":"Can Litmus be self-hosted?","confidence":0.6},{"answer":"We have confirmed 12 integrations for Litmus, including Salesforce Marketing Cloud, Adobe Marketo, Oracle Responsys, Oracle Eloqua, HubSpot, Acoustic Campaign, Mailchimp and Campaign Monitor, plus 4 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://www.litmus.com","question":"What does Litmus integrate with?","confidence":0.6},{"answer":"We have independently confirmed SOC 2 and GDPR for Litmus. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Litmus not holding them. Always confirm compliance directly before you rely on it.","source":"https://www.litmus.com/blog/soc-2-type-2-compliance","question":"What security certifications does Litmus have?","confidence":0.7},{"answer":"Litmus is available worldwide. Its primary markets are the United States and the United Kingdom.","source":"https://www.litmus.com","question":"Where is Litmus available?","confidence":0.75}]` | `[{"answer":"MailSlurp is an email and SMS testing platform providing ephemeral or permanent inboxes and phone numbers for developers to verify sign-ups, OTPs, and notification delivery. It includes email preview across multiple clients, deliverability tracking, and REST APIs for integration into automated test workflows. It is indexed under Email Testing Dev.","source":"https://www.mailslurp.com","question":"What is MailSlurp?","confidence":0.6},{"answer":"MailSlurp offers a free tier, so you can start without paying. Pricing changes often, so verify at source before relying on it.","source":"https://www.mailslurp.com/compare/sendgrid-pricing/","question":"Is MailSlurp free?","confidence":0.6},{"answer":"We have confirmed browser-based access to MailSlurp. That is the extent of what we could verify from public sources, so it may well offer desktop or mobile clients we have not indexed.","source":"https://www.mailslurp.com","question":"What platforms does MailSlurp support?","confidence":0.6},{"answer":"We have only confirmed a cloud / SaaS deployment for MailSlurp, so it appears to be vendor-hosted. If a self-hosted option exists we have not found it documented publicly.","source":"https://www.mailslurp.com","question":"Can MailSlurp be self-hosted?","confidence":0.6},{"answer":"We have confirmed 12 integrations for MailSlurp, including Zapier, Gmail, Outlook, Dropbox, Google Drive, Playwright, CypressJS and ACCELQ, plus 4 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://www.mailslurp.com","question":"What does MailSlurp integrate with?","confidence":0.6},{"answer":"We have independently confirmed SOC 2 for MailSlurp. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as MailSlurp not holding them. Always confirm compliance directly before you rely on it.","source":"https://www.mailslurp.com","question":"What security certifications does MailSlurp have?","confidence":0.48}]` |
| deployment.options | `{"cloud":true}` | `{"cloud":true}` |
| description.long | Litmus provides email preview, testing, and personalization tools for marketing teams to create, test, and optimize email campaigns across multiple clients and devices. It integrates with email service providers and marketing platforms to streamline email production workflows. | MailSlurp is a cloud-based service that allows developers to create test email addresses and phone numbers, preview emails on real devices, validate message delivery, extract data from messages, and build automated messaging workflows through REST APIs and SDKs. |
| features.capabilities | `{"rendering_preview":true}` | `{"open_source":false,"sms_testing":true,"api_assertions":true,"spam_score_check":true,"ci_cd_integration":true,"rendering_preview":true,"multi_user_inboxes":true,"production_sending_addon":true,"blocklist_deliverability_check":true}` |
| integrations.count | 9 | 8 |
| integrations.list | `[{"name":"Salesforce Marketing Cloud"},{"name":"Adobe Marketo"},{"name":"Oracle Responsys"},{"name":"Oracle Eloqua"},{"name":"HubSpot"},{"name":"Acoustic Campaign"},{"name":"Mailchimp"},{"name":"Campaign Monitor"},{"name":"Trello"},{"name":"Slack"},{"name":"Dropbox"},{"name":"Dreamweaver"},{"name":"Pardot","category":"email"},{"name":"Google Analytics","category":"analytics","direction":"outbound"}]` | `[{"name":"Zapier"},{"name":"Gmail"},{"name":"Outlook"},{"name":"Dropbox"},{"name":"Google Drive"},{"name":"Playwright"},{"name":"CypressJS"},{"name":"ACCELQ"},{"name":"Mailchimp","native":true,"category":"email_marketing","direction":"inbound"},{"name":"Klaviyo","native":true,"category":"email_marketing","direction":"inbound"},{"name":"HubSpot","native":true,"category":"crm","direction":"inbound"},{"name":"Salesforce","native":true,"category":"crm","direction":"inbound"},{"name":"Cypress","native":true},{"name":"Selenium","native":true}]` |
| market.availability | `{"primaryMarkets":["US","GB"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | - |
| platform.support | `{"web":true}` | `{"web":true}` |
| pricing | - | `{"type":"free","freeTier":true,"sourceUrl":"https://www.mailslurp.com/compare/litmus-pricing/","retrievedAt":"2026-10-12T16:13:40.324Z"}` |
| pricing.free_tier | - | yes |
| pricing.model | - | free |
| pricing.price_level | - | free |
| pricing.transparent | - | no |
| security.certifications | `[{"name":"SOC 2 Type 2","level":"Type II","status":"active","evidenceUrl":"https://www.litmus.com/blog/soc-2-type-2-compliance"},{"name":"Data Privacy Framework (DPF)","status":"active"}]` | - |
| security.gdpr | yes | yes |
| security.soc2 | yes | yes |
| security.trust_center | https://www.litmus.com/blog/soc-2-type-2-compliance | https://www.mailslurp.com/compliance/ |

## Capabilities (Email Testing Dev)

| Capability | Litmus | MailSlurp |
|---|:--:|:--:|
| **Capabilities** |  |  |
| API assertions | - | ✓ |
| Rendering preview | ✓ | ✓ |
| Spam score check | - | ✓ |
| Blocklist deliverability check | - | ✓ |
| SMS testing | - | ✓ |
| Production sending addon | - | ✓ |
| Ci cd integration | - | ✓ |
| Multi user inboxes | - | ✓ |
| Open source | - | ✗ |

*Source: vioscaleAI. Generated 2026-10-16T20:59:44.108Z. "-" = undocumented, not absent.*