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Litmus

by Litmus

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What Litmus is

Litmus is an email workflow platform for building, testing, monitoring, and analyzing campaigns. Teams can preview emails across more than 100 email clients and devices, while Litmus Test automates pre-send quality checks. Its extension can validate links, images, and tracking. After deployment, Email Guardian monitors emails around the clock and alerts users to issues such as failing links or broken renders. Litmus Builder offers code and visual editors; emails can be made from templates, started from scratch, or imported from cloud storage. Listed integrations include Salesforce Marketing Cloud, Mailchimp, Marketo, Eloqua, HubSpot, Klaviyo, Slack, Trello, and cloud storage. Some integrations require Plus or Enterprise, and ESP Sync depends on the plan and supported provider. REST APIs cover Email Previews and Email Analytics, with access evaluated case by case. Litmus is a paid product with no free plan, but it offers a 7-day trial. Monthly plans listed are Basic at $99 a month, Plus at $199 a month, and Core at $500 a month.

Who it suits

Litmus is aimed at marketers and email teams that need to build, check, monitor, and analyze email campaigns. It may suit teams looking for inbox previews and pre-send QA alongside campaign creation tools.

What it does well

  • Previews emails across more than 100 clients and devices.
  • Automates pre-send QA checks and validates links, images, and tracking.
  • Monitors deployed emails and alerts users to issues.
  • Includes code and visual editors in Litmus Builder.

What to know first

  • No free plan; the trial lasts 7 days.
  • Some integrations require Plus or Enterprise.
  • API access is evaluated case by case.

Limits

There is no free plan. Basic includes one full user and 1,000 Email Previews; Core includes five full users, 2,000 previews per month, 500,000 analytics opens per month, and 50,000 Personalize impressions per month. Some integrations and ESP Sync availability depend on plan and provider.

Plans

PlanBilled and limitsPrice
Litmus BasicMonthly; the page also lists a yearly option at $79 USD per month, saving $240 yearly. · 1 full user · unlimited read-only users · 1,000 Email Previews in 100+ clients and devices$99 a month
Litmus PlusMonthly; the page advertises a 7-day free trial. · For email teams of 2–3 people$199 a month
Litmus CoreMonthly; the page also lists a yearly option at $417 USD per month, saving $1,000 yearly. · 5 full users · 2,000 Email Previews/month · 500,000 analytics opens/month · 50,000 Personalize impressions/month$500 a month
Litmus Core yearlyper month, billed yearly · 5 full users · 2,000 previews/month · 500,000 analytics opens/month · 50,000 Personalize impressions/month · automated QA · 100+ clients/devices · builder · testing profiles · code-editor integrations · Mailchimp and Klaviyo integrations$417 a month
Litmus Core monthlyper month · 5 full users · 2,000 previews/month · 500,000 analytics opens/month · 50,000 Personalize impressions/month · automated QA · 100+ clients/devices · builder · testing profiles · code-editor integrations · Mailchimp and Klaviyo integrations$500 a month
Litmus Basic yearlyper month, billed yearly · 1 full user · unlimited read-only users · 1,000 previews · 100+ clients/devices · Email Guardian · Design Library · Litmus Test · productivity integrations$79 a month
Litmus Basic monthlyper month · 1 full user · unlimited read-only users · 1,000 previews · 100+ clients/devices · Email Guardian · Design Library · Litmus Test · productivity integrations$99 a month

As litmus.com lists them, read 2 Oct 2026. The maker's own page has the final word.

Getting started

  1. Visit the Litmus website.
  2. Start the 7-day trial offered with Litmus Plus.
  3. Choose a paid plan: Basic, Plus, or Core.
  4. Use the web platform, extension, or API, depending on the workflow and access.

Verdict

Litmus brings campaign building, pre-send checks, previews, and post-send monitoring into one workflow. Its paid plans and plan-dependent integrations are important to weigh before choosing it.

Questions

Does Litmus have a free plan or trial?

There is no free plan. A 7-day trial is offered.

How much does Litmus cost?

Monthly prices listed are $99 a month for Basic, $199 a month for Plus, and $500 a month for Core. Basic also has a yearly option at $79 USD per month, and Core at $417 USD per month.

Which platforms does Litmus support?

The listed platforms are web, extension, and API.

Which integrations are listed?

Litmus lists Salesforce Marketing Cloud, Mailchimp, Marketo, Eloqua, HubSpot, Klaviyo, Slack, Trello, and cloud storage. Some integrations require Plus or Enterprise.

Does Litmus offer API access?

It offers REST-based APIs for Email Previews and Email Analytics. Access is evaluated case by case.

Who makes Litmus?

Litmus is made by Litmus, founded in 2005 and headquartered in Boston, Massachusetts, United States.

Facts from Litmus's own pages

Acquisition news
Validity announced completion of its Litmus acquisition on April 10, 2025; financial terms were not disclosed. · prnewswire.com, 15 Oct 2026
Analytics
Email Analytics reports engagement details including opens, read time, deletion, glances, skims, and geolocation. · getapp.com, 15 Oct 2026
API
Litmus offers REST-based APIs for Email Previews and Email Analytics, with access evaluated case by case. · docs.litmus.com, 2 Oct 2026
API access
API access is evaluated case by case and prospective users are directed to contact Litmus partners support. · docs.litmus.com, 15 Oct 2026
Browser requirements
The web app supports current stable desktop Safari, Chrome, Edge, and Firefox with JavaScript and cookies enabled; tablet and phone browsers are unsupported. · help.litmus.com, 15 Oct 2026
Builder
Litmus Builder supports code and visual editors, and emails can be created from templates, from scratch, or imported from cloud storage. · litmus.com, 2 Oct 2026
Chrome extension
The Chrome extension previews, personalizes, troubleshoots, and tests emails from local editors or ESP editors. · chromewebstore.google.com, 15 Oct 2026
Collaboration
Users can share proofs, collect comments and approvals, and collaborate with stakeholders on rendered email versions. · trustradius.com, 15 Oct 2026
Company facts
LinkedIn lists Litmus as privately held, founded in 2005, headquartered in Cambridge, Massachusetts, with 51–200 employees. · linkedin.com, 15 Oct 2026
Company legal name
Crunchbase lists the legal name as Litmus Software, Inc. · crunchbase.com, 15 Oct 2026
Compliance
The Trust Center states that the Litmus SaaS product is included in Validity’s ISO certification and reports that Litmus’s annual SOC 2 Type II audit completed with no exceptions. · trust.validity.com, 2 Oct 2026
Documentation
The help center documents previews, client differences, integrations, browser support, accessibility, spam testing, security, and troubleshooting. · help.litmus.com, 15 Oct 2026
Email builder
The product includes HTML and visual editors for creating on-brand emails with or without coding. · litmus.com, 15 Oct 2026
Email Guardian
Email Guardian provides unlimited 24/7 monitoring and alerts when client changes may break an email. · litmus.com, 15 Oct 2026
Email monitoring
Email Guardian monitors deployed emails around the clock and alerts users to issues such as failing links and broken renders. · litmus.com, 2 Oct 2026
Email previews
Litmus previews emails across more than 100 popular email clients and devices, including dark mode. · litmus.com, 15 Oct 2026
Extension limitation
The extension is free to download but full pre-send testing and personalization require a paid Litmus account, and it is currently Chrome-only. · help.litmus.com, 15 Oct 2026
Founded
2005 · litmus.com, 23 Sept 2026
Free plan
No · litmus.com, 20 Sept 2026
Funding and owner
Crunchbase lists Spectrum Equity as the Series A investor and says Litmus was acquired by Validity. · crunchbase.com, 15 Oct 2026
Headquarters
Boston, Massachusetts, United States · litmus.com, 23 Sept 2026
Instant API
The Instant API accepts email content by POST and returns client previews through GET requests, with HTTPS endpoints and Basic or OAuth authentication. · docs.litmus.com, 15 Oct 2026
Integration limits
The help documentation says some integrations require Plus or Enterprise, and ESP Sync availability depends on plan and supported provider. · help.litmus.com, 2 Oct 2026
Integrations
Integrations cover ESPs, code editors, Slack, Trello, Dropbox, Google Drive, OneDrive, Salesforce Marketing Cloud, Marketo, and other martech tools. · litmus.com, 15 Oct 2026

Where Litmus stands on Freedom251

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