Skip to content
SPECIFICTION
Get listed

Litmus

litmus.com

From $79/mo Free trial WebAPIBrowser extension
Visit litmus.com
Spec score 8.7 #2 of 23 in Email Personalization Software

What it 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. Email Guardian monitors deployed emails around the clock and alerts users to issues such as failing links and broken renders. Litmus Builder offers code and visual editors; emails can start from templates, be created from scratch, or be 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 availability depends on the plan and supported provider. REST APIs are available for Email Previews and Email Analytics, with access evaluated case by case. Litmus offers web, extension, and API access. Monthly prices listed are $99 a month for Basic, $199 a month for Plus, and $500 a month for Core. There is no free plan, but a 7-day trial is available.

Spec sheet

What it does
Litmus is a web-based email development and optimization platform for building, previewing, testing, tracking, and reviewing campaigns.Read 15 Oct 2026 · getapp.com
Product
Litmus describes itself as an AI-native platform for the email workflow, including building, testing, monitoring, and campaign insights.Read 2 Oct 2026 · litmus.com
Intended users
Litmus says it serves marketers and email teams seeking to build, test, analyze, and improve email campaigns.Read 2 Oct 2026 · litmus.com
Free plan
NoRead 20 Sep 2026 · litmus.com
API
Litmus offers REST-based APIs for Email Previews and Email Analytics, with access evaluated case by case.Read 2 Oct 2026 · docs.litmus.com
Integrations
Integrations cover ESPs, code editors, Slack, Trello, Dropbox, Google Drive, OneDrive, Salesforce Marketing Cloud, Marketo, and other martech tools.Read 15 Oct 2026 · litmus.com
Security
The Validity Trust Center lists Litmus security materials including its Security White Paper and SOC 2 Type 2 report.Read 2 Oct 2026 · trust.validity.com
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.Read 2 Oct 2026 · trust.validity.com
Support
Litmus directs customers to its Help Center and support team for product guidance and assistance.Read 2 Oct 2026 · litmus.com
Headquarters
Boston, Massachusetts, United StatesRead 23 Sep 2026 · litmus.com
Founded
2005Read 23 Sep 2026 · litmus.com
Acquisition news
Validity announced completion of its Litmus acquisition on April 10, 2025; financial terms were not disclosed.Read 15 Oct 2026 · prnewswire.com
Analytics
Email Analytics reports engagement details including opens, read time, deletion, glances, skims, and geolocation.Read 15 Oct 2026 · getapp.com
API access
API access is evaluated case by case and prospective users are directed to contact Litmus partners support.Read 15 Oct 2026 · docs.litmus.com
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.Read 15 Oct 2026 · help.litmus.com
Builder
Litmus Builder supports code and visual editors, and emails can be created from templates, from scratch, or imported from cloud storage.Read 2 Oct 2026 · litmus.com
Chrome extension
The Chrome extension previews, personalizes, troubleshoots, and tests emails from local editors or ESP editors.Read 15 Oct 2026 · chromewebstore.google.com
Collaboration
Users can share proofs, collect comments and approvals, and collaborate with stakeholders on rendered email versions.Read 15 Oct 2026 · trustradius.com
Company facts
LinkedIn lists Litmus as privately held, founded in 2005, headquartered in Cambridge, Massachusetts, with 51–200 employees.Read 15 Oct 2026 · linkedin.com
Company legal name
Crunchbase lists the legal name as Litmus Software, Inc.Read 15 Oct 2026 · crunchbase.com
Documentation
The help center documents previews, client differences, integrations, browser support, accessibility, spam testing, security, and troubleshooting.Read 15 Oct 2026 · help.litmus.com
Email builder
The product includes HTML and visual editors for creating on-brand emails with or without coding.Read 15 Oct 2026 · litmus.com
Email Guardian
Email Guardian provides unlimited 24/7 monitoring and alerts when client changes may break an email.Read 15 Oct 2026 · litmus.com
Email monitoring
Email Guardian monitors deployed emails around the clock and alerts users to issues such as failing links and broken renders.Read 2 Oct 2026 · litmus.com
Email previews
Litmus previews emails across more than 100 popular email clients and devices, including dark mode.Read 15 Oct 2026 · litmus.com
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.Read 15 Oct 2026 · help.litmus.com
Funding and owner
Crunchbase lists Spectrum Equity as the Series A investor and says Litmus was acquired by Validity.Read 15 Oct 2026 · crunchbase.com
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.Read 15 Oct 2026 · docs.litmus.com
Integration limits
The help documentation says some integrations require Plus or Enterprise, and ESP Sync availability depends on plan and supported provider.Read 2 Oct 2026 · help.litmus.com
Licence
Litmus is proprietary hosted software; its terms describe subscription services and copyright-protected software and content.Read 15 Oct 2026 · litmus.com
Limit: analytics and previews
TrustRadius reviewers repeatedly report that analytics depth, reporting detail, preview-environment breadth, and testing efficiency could improve.Read 15 Oct 2026 · trustradius.com
Limit: pricing and billing
Trustpilot reviewers complain about renewal price increases, preview-based charges, limited refunds, and subscriptions continuing after trial use.Read 15 Oct 2026 · trustpilot.com
Personalization
Litmus provides personalization templates such as countdown timers, live polls, custom images, and other dynamic modules.Read 15 Oct 2026 · litmus.com
Praise: rendering and QA
TrustRadius reviewers repeatedly praise broad cross-client rendering, intuitive testing, link and accessibility checks, spam checks, and reduced QA time.Read 15 Oct 2026 · trustradius.com
Pre-send QA
The automated QA workflow checks links, images, tracking, accessibility, loading speed, and other campaign elements before sending.Read 15 Oct 2026 · help.litmus.com
Public API
Litmus documents REST APIs for Email Previews and Email Analytics, including Instant API, Analytics API, and legacy previews functions.Read 15 Oct 2026 · docs.litmus.com
Quality assurance
Litmus Test automates pre-send QA checks, and its extension can validate links, images, and tracking.Read 2 Oct 2026 · litmus.com
Rating on Chrome Web Store
4.5 out of 5 from 40 ratingsRead 15 Oct 2026 · chromewebstore.google.com
Rating on GetApp
4.6 out of 5 from 53 reviewsRead 15 Oct 2026 · getapp.com
Rating on Trustpilot
2.5 out of 5 from 8 reviewsRead 15 Oct 2026 · trustpilot.com
Rating on TrustRadius
8.6 out of 10 from 652 reviews and ratingsRead 15 Oct 2026 · trustradius.com
SDKs
The API documentation lists partner integrations using C#, Visual Basic, PHP, Ruby, Python, Perl, and Java, but does not present an official SDK package.Read 15 Oct 2026 · docs.litmus.com
Security features
Litmus documentation covers GDPR compliance, enterprise privacy settings, SAML single sign-on, identity-provider setup, and a status page.Read 15 Oct 2026 · help.litmus.com
Spam testing
Litmus Spam Testing scans messages against more than 25 spam filters and supplies remediation guidance.Read 15 Oct 2026 · litmus.com

Plans and prices

Litmus Basic $99 a month Monthly; 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 Read 2 Oct 2026 · litmus.com
Litmus Plus $199 a month Monthly; the page advertises a 7-day free trial. For email teams of 2–3 people Read 2 Oct 2026 · litmus.com
Litmus Core $500 a month Monthly; 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 Read 2 Oct 2026 · litmus.com
Litmus Basic yearly $79 a month per month, billed yearly 1 full user · unlimited read-only users · 1,000 previews · 100+ clients/devices · Email Guardian · Design Library · Litmus Test · productivity integrations Read 15 Oct 2026 · litmus.com
Litmus Basic monthly $99 a month per month 1 full user · unlimited read-only users · 1,000 previews · 100+ clients/devices · Email Guardian · Design Library · Litmus Test · productivity integrations Read 15 Oct 2026 · litmus.com
Litmus Core yearly $417 a month per 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 Read 15 Oct 2026 · litmus.com
Litmus Core monthly $500 a month per 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 Read 15 Oct 2026 · litmus.com

Every Litmus plan and price →

Strong points and limits

Strong points

  • Previews cover more than 100 email clients and devices.
  • Automates pre-send quality checks.
  • Monitors deployed emails and alerts users to issues.
  • Builder includes code and visual editors.
  • REST APIs cover previews and analytics.

Limits

  • No free plan; trial lasts 7 days.
  • Monthly plans start at $99 a month.
  • Some integrations require Plus or Enterprise.
  • API access is evaluated case by case.

Who it suits

Litmus suits marketers and email teams that need to create, check, monitor, and analyze campaigns. Its preview coverage and automated checks are relevant to teams reviewing email rendering and links before sending.

Verdict

Litmus covers campaign creation through post-send monitoring, with extensive preview coverage and automated checks. Buyers should confirm plan requirements for integrations and API access before choosing.

Where Specifiction places it

Alternatives to LitmusAll alternatives →