Litmus

paid

Litmus helps marketing teams design, test, personalize, and optimize email campaigns across 100+ email clients. Improve deliverability and maximize ROI with every send.

Productivity

Marketing & Sales

Email Marketing Tools

About

Litmus is an all-in-one email marketing solution trusted by thousands of brands to make every email send count. The platform provides a complete suite of tools that work alongside your existing Email Service Provider (ESP) to cover every stage of the email marketing workflow—from creation to analytics. With Litmus, marketing teams can design and build on-brand email templates, add dynamic personalization including interactive elements like live polls and scratch-offs, and collaborate on reviews—all within a single workspace. Before sending, teams can test how emails render across 100+ email clients and devices, catching broken links, missing images, and accessibility errors automatically. Litmus also includes advanced deliverability tools that monitor campaigns 24/7 for issues, test against major spam filters and blocklists, and alert teams to problems before they impact subscribers. Its analytics capabilities provide deep insight into campaign performance by device and email client, tracking engagement and consolidating data from multiple sources in one dashboard. The platform integrates with all major ESPs including HubSpot, Mailchimp, Klaviyo, Salesforce Marketing Cloud, Adobe Marketo, Oracle Eloqua, and many more. Rated 4.5 stars from over 10,000 reviews, Litmus is ideal for marketing teams at mid-market and enterprise companies looking to reduce error rates, streamline review cycles, and scale high-quality email programs.

Key Features

Email Testing Across 100+ Clients: Preview and test how your emails render across 100+ email clients and devices before sending, with automated QA checks for broken links, missing images, and accessibility issues.
Dynamic Personalization & Interactivity: Add dynamic personalization and interactive elements like live polls and scratch-offs to create memorable, engaging email experiences tailored to each subscriber.
Deliverability Monitoring & Spam Testing: Get 24/7 monitoring and real-time alerts for deliverability issues, with spam filter and blocklist tests to ensure emails reach inboxes—not spam folders.
Email Analytics & Performance Insights: Analyze campaign performance by device and email client, track subscriber engagement behavior, and consolidate data from multiple sources in one unified dashboard.
Team Collaboration & Review Workflows: Design, code, and review emails in one collaborative workspace with streamlined approval workflows that cut review and approval time by up to 50%.

Use Cases

Testing email rendering across 100+ clients and devices before a major campaign launch to prevent broken layouts and poor subscriber experiences
Monitoring email deliverability in real time to quickly identify and resolve blocklisting or spam filter issues within hours
Streamlining the email review and approval process for large marketing teams to reduce production cycles and error rates
Adding dynamic personalization and interactive elements to email campaigns to boost subscriber engagement and drive higher conversion rates
Analyzing post-send campaign performance by device and email client to understand engagement patterns and continuously optimize future email programs

Pros

Extensive ESP Integrations: Integrates seamlessly with 10+ major ESPs including HubSpot, Mailchimp, Klaviyo, Salesforce Marketing Cloud, and Adobe Marketo, fitting naturally into existing marketing stacks.
Dramatically Reduces Email Errors: Customers report up to a 68% decrease in email error rates and 50% reduction in review and approval time, protecting brand reputation and saving significant production hours.
End-to-End Email Workflow Coverage: Covers the entire email production lifecycle—design, personalization, testing, deliverability, and analytics—eliminating the need for multiple point solutions.

Cons

Premium Enterprise Pricing: Litmus is positioned as an enterprise-grade tool with a pricing structure that may be prohibitive for small businesses or individual email marketers with limited budgets.
Key Features Gated Behind Upgrades: Advanced deliverability monitoring and deeper analytics capabilities are only available on higher-tier plans, requiring additional investment beyond the base subscription.
Requires a Separate ESP: Litmus complements rather than replaces your ESP, meaning teams must maintain and pay for a separate email sending platform in addition to Litmus.

Frequently Asked Questions

Litmus integrates with a wide range of ESPs including HubSpot, Mailchimp, Klaviyo, Salesforce Marketing Cloud, Adobe Marketo, Adobe Journey Optimizer, Oracle Eloqua, Oracle Responsys, Campaign Monitor, Acoustic Campaign, and SAP Marketing Cloud.

Litmus renders live previews of your email across 100+ email clients and devices—including Gmail, Outlook, Apple Mail, and mobile clients—so you can see exactly how your email will look before sending. It also runs automated QA checks for broken links, missing images, and accessibility errors.

No, Litmus works alongside your existing ESP. Your ESP handles the actual sending of emails, while Litmus provides design, testing, deliverability monitoring, personalization, and analytics tools to optimize your campaigns.

Litmus offers 24/7 monitoring for deliverability issues, spam filter testing, blocklist checks, and real-time alerts so you can identify and resolve problems—like blocklisting—within hours rather than days, protecting your sender reputation.

Litmus is best suited for marketing teams at mid-market to enterprise companies that send email campaigns at scale and need comprehensive tools to ensure quality, consistency, deliverability, and measurable performance across large subscriber bases.