Litmus
Litmus: Broad pre-send email QA with previews, testing, monitoring, integrations, and APIs. Ranked #1 of 27 in Email Testing Software by our editors (9.3/10); pricing: 7-day trial; best for teams needing broad pre-send email QA.
At a glance
- Editor score9.3 / 10
- Pricing7-day trial
- Best forTeams needing broad pre-send email QA
- Free planNo
- Email clients100 clients
- Founded2005 · Boston, Massachusetts, United States
- Facts checked20 Sep 2026
Where it wins
- Previews across 100+ email clients and devices
- Checks accessibility, links, spam issues, content, and code
- Integrations, Chrome extension, and REST APIs support varied workflows
Where it doesn't
- No free plan; access is paid with a 7-day free trial
- Litmus Basic includes one full user
- Litmus Plus is scoped to email teams of 2–3 people
Our verdict on Litmus
Litmus is an email marketing platform for designers, developers, and marketing teams that need to build, inspect, and monitor campaigns before and after sending. Its core workflow combines email creation, previews across 100+ clients and devices, pre-send quality checks, accessibility review, link validation, spam testing, and post-send monitoring through Email Guardian. That makes it a fit for teams that treat rendering, deliverability, and content quality as one QA process rather than separate tasks.
Its feature breadth is the main differentiator. Litmus provides an email builder with HTML and visual editing, customizable testing profiles, automated QA checks, and a Chrome extension for testing during development. REST APIs extend previews, analytics, spam tests, and link checks into other workflows. Integrations include Salesforce Marketing Cloud, Mailchimp, Klaviyo, HubSpot, Campaign Monitor, Marketo, Eloqua, Slack, Trello, Dropbox, Google Drive, and OneDrive. Teams already working across ESPs and productivity tools can connect testing with campaign production instead of relying only on a standalone review step.
Litmus is a paid product with a 7-day free trial. Litmus Basic includes one full user, unlimited read-only users, 100+ client and device previews, Email Guardian monitoring, Design Library, and automated QA checks. Litmus Plus is designed for teams of 2–3 people and adds automated testing and campaign effectiveness improvements. Litmus Core adds an email builder, customizable testing profiles, code editor integrations, and ESP integrations alongside QA and previews. Choose Litmus when broad coverage and connected QA matter; teams seeking a free plan or a simpler, narrower checker should look elsewhere.
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Litmus pricing
All 3 Litmus plans and prices →
Litmus fact sheet
| Free plan | No |
|---|---|
| Paid from | Not verified |
| Email clients | 100 clients |
| Device coverage | Both |
| Spam checks | Yes |
| Accessibility checks | Yes |
| Link checks | Yes |
| Inbox testing | Yes |
| API access | Yes |
| Free trial | 7 days |
| Deployment | Cloud, Browser extension |
| Platforms | Web, Chrome extension |
| Compliance & security | SOC 2, ISO 27001, GDPR |
| Support | Email, Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 12 integrations: Salesforce Marketing Cloud, Mailchimp, Klaviyo, HubSpot, Campaign Monitor, Marketo … See all → |
| Pricing | 7-day trial (source) |
| Website | litmus.com |
| Facts checked | 20 Sep 2026 |
Litmus integrations
Litmus lists 12 integrations on its own site.
- Salesforce Marketing Cloud
- Mailchimp
- Klaviyo
- HubSpot
- Campaign Monitor
- Marketo
- Eloqua
- Slack
- Trello
- Dropbox
- Google Drive
- OneDrive
Alternatives to Litmus
- Twilio Email TestingA flexible email-testing option with a free trial, rendering checks, spam tests, and API access.8.8
- GlockAppsA broad deliverability toolkit for inbox placement, reputation, authentication, and alerts.8.5
- Mailtrap Email SandboxA developer-focused sandbox for capturing, inspecting, and automating email tests safely.8.2
Litmus vs the competition
- Litmus vs Twilio Email Testing
- Litmus vs GlockApps
- Litmus vs Mailtrap Email Sandbox
- Litmus vs MailSlurp
- Litmus vs Mailinator
- Litmus vs Mailosaur
Compare Litmus with any tool side by side →
Also Ranked In
Litmus is ranked in 6 of our directories.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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