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Mailosaur logo

Mailosaur: Pricing, Features & Alternatives

Email and SMS testing for sign-up and authentication flows.

Overall Score49/100
3.6Editor Rating
Market Signal 34

#3 of 5 in Email Testing by Overall Score

What Is Mailosaur?

Mailosaur provides test inboxes, test phone numbers and email previews for automated testing of email and SMS flows.

Best for: QA and developer teams testing transactional email and SMS.

Mailosaur creates test addresses and inboxes that software tests can query, making email and SMS part of automated QA so nobody has to check an inbox manually. It integrates with frameworks such as Playwright, Cypress, and Selenium, and can validate message content, links, codes, and delivery behavior without sending test traffic to real customer inboxes.

3.6
out of 5

Editor Rating

Calculated from facts we verified on Mailosaur's own website, using published thresholds. Nobody can pay to change it. Together with Market Signal it makes the Overall Score of 49 that orders our lists.

  • Pricing transparency4.8
  • Entry cost3.0
  • Free access4.0
  • Platforms & API2.5
  • Support3.0
  • IntegrationsNot scored
  • Security & compliance5.0

Dimensions without verified data count as a neutral 2.5. Facts checked October 6, 2026. How the rating works

34
Modest

Market Signal

Real data

Computed from Ahrefs + Semrush data about Mailosaur's own website. Not an assessment of the product itself. How this works →

Market Strength

19

Where it stands today

Momentum

85 Rising Fast ↑↑

Where it’s heading

Data Confidence

Medium

How much to trust it

  • Traffic Strength
    24
  • Search Visibility
    18
  • Authority
    12
  • Brand & Market Presence
    19

Tick mark = category average.

Compared with 42 tracked Email Marketing tools. Data through September 2026, pulled October 6, 2026.

Who Is It Best For?

  • QA teams testing email and SMS inside automated test suites
  • Developers verifying signup, OTP and password-reset flows

Who Should Avoid It?

  • Marketing teams that need a production newsletter sender

Use Cases

  • Testing signup confirmation emails
  • Verifying OTP and password-reset flows
  • Inspecting rendered email content
  • Automating email checks in CI

Mailosaur Features

  • Email test inboxes
  • SMS test numbers
  • Email previews
  • Automated email testing
  • API access

Mailosaur Pricing

PlanMonthlyAnnual (mo)
Personal$20Not listed
EnterpriseCustomCustom

Pricing shown reflects list prices as of our last check and may have changed. Confirm current pricing on Mailosaur's website before purchasing.

Mailosaur Integrations

No major integrations documented.

Customer Support

Help center, Email

Mailosaur at a Glance

Built for
Small Business, Mid-Market, Enterprise
Platforms
Web, API
Languages
English

Mailosaur Alternatives

ActiveCampaign logo

ActiveCampaign

Overall Score74/100
4.1Editor Rating
Market Signal 70
From $20/mo (annual billing; rises with contacts)Free trial

Why choose it: Small and midsize businesses that run behavior-based email programs and want automation depth more than an included sales CRM.

Strengths

  • • The automation builder branches contacts with split and conditional actions based on behavior.
  • • Site and event tracking lets website activity trigger automations and build segments.

Limitations

  • • Starter and Plus include one user; Pro includes three and Enterprise five.
  • • Lead scoring requires the Pipelines add-on on every plan.
Read ReviewVisit Site
Mailtrap logo

Mailtrap

Overall Score70/100
4.3Editor Rating
Market Signal 57
From $15/mo (varies by email volume)Free plan

Why choose it: Developer and product teams sending and testing application email.

Read ReviewVisit Site
Mailgun logo

Mailgun

Overall Score68/100
4.3Editor Rating
Market Signal 54
From $15/mo (varies by email volume)Free plan

Why choose it: Developers sending transactional email at scale.

Read ReviewVisit Site
GlockApps logo

GlockApps

Overall Score47/100
3.7Editor Rating
Market Signal 27
From $59/moFree plan

Why choose it: Email senders diagnosing why messages land in spam.

Read ReviewVisit Site

Frequently Asked Questions

Does Mailosaur have a free trial or free plan?⌄

Mailosaur doesn't have a permanently free plan, but offers a free trial (14 days) of its paid plans.

How much does Mailosaur cost?⌄

Mailosaur starts at $20/mo, billed annually, on its Personal plan. Pricing was last checked September 28, 2026. Always confirm current pricing on the vendor's site before purchasing.

What are the best alternatives to Mailosaur?⌄

Commonly considered alternatives include ActiveCampaign, Mailtrap, Mailgun, Validity Engage (formerly Litmus) and GlockApps. The Alternatives section on this page shows what each one is best at and its starting price.

Last updated: October 6, 2026Details checked: October 5, 2026Pricing checked: September 28, 2026