Litmus vs Mailosaur

Litmus9.3Visit Mailosaur7.8Visit

Higher score Litmus #1 in Email Testing Software 9.3/10 7-day trial Free trial✓ 5 of 5 features Visit Litmus

vs

Mailosaur #7 in Email Testing Software 7.8/10 14-day trial Free trial✓ 5 of 5 features Visit Mailosaur

• Litmus fits best

  Teams needing broad pre-send email QA

• Mailosaur fits best

  Automated email and SMS test workflows

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Side by side

Feature	Litmus 9.3/10 Visit ↗	Mailosaur 7.8/10 Visit ↗
At a glance
Editor score	9.3	7.8
Ranking	#1 in Email Testing Software	#7 in Email Testing Software
Best for	Teams needing broad pre-send email QA	Automated email and SMS test workflows
Pricing model	Paid	Paid
Starting price	—	$20/mo
Free plan	—	—
Free trial	7 days	14 days
Free trial length	7 days	14 days
Deployment	Cloud, Browser extension	Cloud
Platforms	Web, Chrome extension	Web
Support	Email, Docs	Email, Docs
Compliance	SOC 2, ISO 27001, GDPR	ISO 27001, GDPR, SSO/SAML, 2FA
Integrations	12 integrations	13 integrations
Built for	Solo, Small business, Mid-market, Enterprise	Solo, Small business, Mid-market, Enterprise
Features Litmus 5/5 · Mailosaur 5/5
Spam checks	✓	✓
Accessibility checks	✓	✓
Link checks	✓	✓
Inbox testing	✓	✓
API access	✓	✓
Specs
Email clients	100 clients	Not checked yet
Device coverage	Both	Both
Our review
Pros	Previews across 100+ email clients and devices Checks accessibility, links, spam issues, content, and code Integrations, Chrome extension, and REST APIs support varied workflows	Virtual inboxes support unlimited test email addresses. Checks accessibility, spam, links, and compatibility across 90+ clients. Integrates with major test frameworks, CI tools, and a REST API.
Cons	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	There is no free plan. Displayed Personal and Core prices use annual billing. Advanced permissions, SSO, and account controls require Enterprise.
Our verdict	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… Read the review →	Mailosaur is a cloud platform for testing email and SMS workflows, aimed at individual testers, collaborative QA teams, and enterprises validating end-to-end messaging journeys. Virtual inboxes and unlimited test email addresses support… Read the review →

Strengths and trade-offs

• Litmus — 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

• Mailosaur — where it wins

  • Virtual inboxes support unlimited test email addresses.
  • Checks accessibility, spam, links, and compatibility across 90+ clients.
  • Integrates with major test frameworks, CI tools, and a REST API.

  Where it doesn't

  • There is no free plan.
  • Displayed Personal and Core prices use annual billing.
  • Advanced permissions, SSO, and account controls require Enterprise.

• Litmus9.3/10 · 7-day trial

  Broad pre-send email QA with previews, testing, monitoring, integrations, and APIs.

  Visit LitmusFull verdict →
• Mailosaur7.8/10 · 14-day trial

  A strong choice for automated email and SMS validation across clients, devices, and test frameworks.

  Visit MailosaurFull verdict →