Litmus is the leading email testing and analytics platform, enabling email marketing teams to preview how their emails render across 100+ email clients and devices, test spam filter performance, validate links and images, and track post-send engagement analytics — ensuring every email looks and performs exactly as intended before reaching recipients.
Product Overview
Litmus is the industry standard tool for email quality assurance: before a campaign goes to hundreds of thousands of subscribers, Litmus allows teams to render a preview of how that exact email will appear in Gmail on Chrome, Outlook 2019 on Windows, Apple Mail on iPhone 15, Samsung Mail on Android, and 90+ other combinations — in seconds. This pre-send testing prevents the rendering failures that cause emails to display broken images, collapsed layouts, or unreadable text in specific clients — problems that are invisible when testing from a single inbox but affect significant portions of the recipient list. Litmus's Spam Testing analyses the email against major spam filters and provides a deliverability score with recommendations. Its Link Validation checks every link in the email for broken URLs before sending. Litmus Analytics provides post-send engagement data including open rates by email client, read time, and dark mode usage — giving teams the data to optimise templates for their specific audience.
Key Features
- Email Previews (100+ Clients): Render the exact email across 100+ email client and device combinations — identify display issues before they reach subscribers.
- Spam Testing: Test against major spam filters and generate a deliverability score — identify content and technical factors triggering spam classification.
- Link Validation: Check every link in the email for broken URLs before sending — prevent dead links from damaging the subscriber experience.
- Email Analytics: Post-send engagement data including open rate by email client, read time, and dark mode usage — optimise templates based on real audience data.
- Code Editor & Checklist: Built-in HTML editor with pre-send checklist — fix issues and preview changes without leaving the platform.
Best For
Email marketing teams at mid-market and enterprise companies that send regular campaigns to large subscriber lists and need to guarantee rendering quality across all email client environments before every send.
Pricing
Basic: $99/month. Plus: $199/month. Enterprise: custom. Free trial available.
Key Integrations
Frequently Asked Questions
What is Litmus used for?
Litmus is the leading email testing and analytics platform, enabling email marketing teams to preview how their emails render across 100+ email clients and devices, test spam filter performance, validate links and images, and track post-send engagement analytics — ensuring every email looks and perf
How much does Litmus cost?
Litmus pricing: Basic: $99/month. Plus: $199/month. Enterprise: custom. Free trial available.
What does Litmus integrate with?
Litmus integrates with Salesforce Marketing Cloud, HubSpot, Marketo, Mailchimp, Braze, Klaviyo, Campaign Monitor.
Is Litmus SOC 2 compliant?
Litmus holds: SOC 2 Type II, GDPR.
Who is Litmus best for?
Email marketing teams at mid-market and enterprise companies that send regular campaigns to large subscriber lists and need to guarantee rendering quality across all email client environments before every send.
What are the best Litmus alternatives?
The tools most often compared with Litmus are GlockApps, Validity, SendGrid.
Mailchimp, Salesforce Marketing Cloud, HubSpot, Klaviyo, Marketo, Campaign Monitor, Braze, Iterable, ActiveCampaign, Constant Contact
Pros
- 100+ email client previews — most comprehensive rendering coverage in the market
- Industry-standard tool — virtually every major ESP has a native Litmus integration
- Post-send analytics by email client reveal where your audience actually reads email
- Prevents rendering failures that damage brand perception with large subscriber segments
Cons
- Pricing is high for small teams or low-volume senders who send infrequent campaigns
- Focused on rendering and deliverability — not a warmup or reputation-building tool
- Some email client previews use simulated renders rather than real client rendering
RevOps Jobs-to-Be-Done
- Email Preview Across 100+ Clients — Preview how emails render across every major email client, browser, and device before sending to eliminate broken rendering. KPI: Eliminate 100% of rendering issues from campaigns with comprehensive pre-send preview testing
- Email Analytics and Engagement Tracking — Track email engagement beyond standard ESP metrics with device analytics, read time, and forwarding behavior. KPI: Improve email strategy with 30% more engagement data than native ESP analytics provide
- Email Quality Assurance and Collaboration — Use Litmus's review and approval workflow to catch errors, ensure accessibility, and get sign-off before any email goes to market. KPI: Reduce email error rate to near-zero with structured pre-send QA workflow and team approval process
How It Fits Your Stack
Primary system of record: Email service providers and marketing automation
Key integrations: Salesforce Marketing Cloud, HubSpot, Marketo, Mailchimp, Braze, Klaviyo, Campaign Monitor
Data flows: Email HTML synced to Litmus; previews generated across clients; approval workflow managed; analytics tracking code added; engagement data fed back to dashboard
Security & Compliance
- SSO / SAML: SAML 2.0 and Okta
- RBAC / permissions: Yes
- Audit logs: Yes
- Certifications: SOC 2 Type II, GDPR
- Data residency: US
Implementation & Ownership
- Time to first value: 1–2 days
- Implementation complexity: Low — ESP integration and team setup
- Typical owners: Email Marketing Manager, Marketing Operations, CRM Manager
Industry standard for email QA at enterprise marketing teams; nearly universal use among mature email programs
Proof & Buyer Signals
Ratings: G2: 4.4/5 (600+ reviews)
What buyers praise:
- Most comprehensive email preview coverage
- QA workflow is excellent for teams
- Analytics beyond ESP basics
Common complaints:
- Premium pricing vs lighter tools
- Preview generation time can be slow for large templates
Often Compared With
- GlockApps — GlockApps specializes in spam filter and deliverability testing; Litmus focuses on email rendering, QA workflow, and engagement analytics
- Validity — Validity is an enterprise deliverability platform; Litmus focuses on email rendering and team QA workflow for the creative and production side
- SendGrid — SendGrid is email sending infrastructure; Litmus is the QA and analytics layer that works alongside any ESP including SendGrid
