Looking for a Litmus alternative? See your delivered campaign across real email clients and devices with MailSlurp. Catch broken layouts, disappearing images and dark-mode surprises before you send.
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Review the campaign across supported email clients and configured render targets, compare results, and inspect the source HTML before the campaign reaches customers.
Comparing Litmus alternatives? Choose MailSlurp for flexible pricing, real-client previews and the checks that take a campaign from first review to ready to send.
Start free, then choose prepaid preview capacity or pay-as-you-go usage to suit your campaign calendar. Compare the current plans and render allowances with the clients and reruns your team needs. Bringing an existing Litmus invoice? Talk to us about your workload.
Open completed client screenshots while the remaining targets finish. Compare Outlook with Gmail, or put the corrected campaign beside a previous run to spot layout, image and dark-mode differences. Saved target profiles make the next campaign easy to repeat. See the comparison workflow.
Send render-status notifications to your team's channels and share a link to the results. Keep comments on the run or the affected client screenshot, then resolve them when the fix is ready. Use team access for colleagues and share links for reviewers. Connect your review channel.
A good-looking button can still lead to a broken page. MailSlurp Email Audit checks links, images, unresolved template values, accessibility and HTML support. Review the findings, fix the campaign and rerun the checks alongside your device previews.
Pair previews with inbox placement testing to see inbox, Promotions and spam results from the provider mailboxes in your test. Investigate sender issues with domain health monitoring for SPF, DKIM, DMARC, MX and blocklists. Each check answers a separate question before you send.
Keep building campaigns in your existing email platform and send a test to your MailSlurp render address. Your developers can use the API and SDKs to start runs and retrieve results, then add email and SMS journey tests for verification codes, password resets and notifications.
Check the campaign your customers will receive, from the way it looks to the links they click and the folder it reaches.
Compare mobile and desktop clients, then check light and dark modes. Spot awkward line breaks, missing backgrounds and hard-to-read buttons before your customers do.
Use Email Audit to find broken links, missing images, unresolved placeholders and accessibility issues in the delivered message. Fix the campaign and run it again.
Run a separate inbox placement test to see inbox, promotions and spam results across provider mailboxes. A good-looking email deserves a delivery check too.
Move from a test send to a shared review in three steps. Keep the ESP, templates and campaign process your team already knows.
Send a test from HubSpot, Mailchimp, Salesforce or your own application to a dedicated render address. You can also import an .eml file.
Choose the supported clients your audience uses and review the same email on each. Check the logo, layout and main call to action at a glance.
Send a shareable preview link to your teammates. Review one set of results together, update the template and rerun before the campaign goes out.
Follow the exact test-send workflow for your email service provider.
BrazePreview delivered Braze campaigns.Open Braze device preview guide
BrevoReview Brevo emails across clients.Open Brevo device preview guide
Constant ContactCheck delivered campaign rendering.Open Constant Contact device preview guide
GetResponseCompare newsletter renders.Open GetResponse device preview guide
HubSpotInspect delivered HubSpot emails.Open HubSpot device preview guide
KitReview Kit Broadcasts on devices.Open Kit device preview guide
KlaviyoCompare Klaviyo campaign renders.Open Klaviyo device preview guide
MailchimpPreview campaigns before launch.Open Mailchimp device preview guide
MailerLiteCheck campaigns across clients.Open MailerLite device preview guide
MailjetReview Mailjet email rendering.Open Mailjet device preview guide
OmnisendPreview Omnisend campaigns everywhere.Open Omnisend device preview guide
SalesforceInspect Salesforce emails across clients.Open Salesforce device preview guideA few practical answers before you test your first campaign.
Yes. Send a test campaign to a MailSlurp render inbox and compare screenshots across supported email clients and devices. Review layout, images, buttons and light or dark modes, then share the results with your team. Start in the dashboard without writing code. Explore device previews.
Yes. Keep building campaigns in your email service provider and send a test to your MailSlurp render address. You can also import an .eml file. The provider guides show how to send and review the delivered message. Follow the HubSpot preview guide.
Yes. Select the relevant Outlook, mobile, desktop and light or dark targets in the current target selector. Compare the same message across those clients, fix the template and rerun it. Client-specific results make issues such as missing backgrounds or low-contrast logos easier to spot. Compare Outlook previews.
Use device previews to check appearance and a separate inbox placement test to see where the message lands. MailSlurp reports inbox, promotions or spam outcomes from the provider mailboxes in your placement test, so you can review both before a campaign. See inbox placement testing.
Send one of your own campaigns through your existing email platform. Choose the clients your audience uses, review the screenshots, correct an issue and compare the next run. Try the sharing and notification steps with a teammate, then compare the preview allowance with your expected campaigns and reruns. Our HubSpot guide includes seven saved desktop results from one actual campaign to show what a review looks like. See the HubSpot campaign results.
Yes. MailSlurp APIs can create preview runs from received emails or imported .eml files and retrieve the results. Programmable inboxes also let your team receive verification emails, extract OTPs and password-reset links, and test the complete customer journey in Playwright, Cypress or CI. Read the device render API guide.
Send one test email. Compare the clients your audience uses. Give your team a clear view of what needs fixing before launch.
