When is Debug Mail the better choice?

You need a fake SMTP endpoint to catch outgoing mail from an app during local or staging tests. You are a very small team, and only 1 to 2 people need shared access to a single project. You want unlimited test emails without paying, and forwarding needs are very light. You prefer a simple inbox capture workflow over a broader QA platform. You do not need private inboxes, webhooks, SMS, or load testing.

When is Mailinator the better choice?

You want free disposable inboxes with no sign-up for quick testing. You need SMS testing in the same tool as email workflows. You want API access, webhooks, routing rules, or email load testing on the free tier. You expect to move into private inboxes, private domains, or SSO later. You are testing sign-up, OTP, password reset, or other message-driven flows at higher scale.

Debug Mail vs Mailinator: Free Tier Comparison

Q: How much does Debug Mail cost after the free tier?

Silver - $2 per user per month. Debug Mail’s paid plans are per-seat: Silver starts at $2 per user per month and Gold at $5 per user per month, so costs rise as collaboration grows. Mailinator’s paid tiers are mostly flat: Business is $79 per month billed yearly, Business Plus is $159 per month billed yearly, and Enterprise is custom at $699 and up. That means Debug Mail is cheaper for a tiny team, but Mailinator becomes the more complete buy once you need private inboxes, domains, SSO, or larger message volumes. No usage-based rates were provided, so there are no exact extrapolated usage scenarios here.

Q: How much does Mailinator cost after the free tier?

Business - $79 per month billed yearly. Debug Mail’s paid plans are per-seat: Silver starts at $2 per user per month and Gold at $5 per user per month, so costs rise as collaboration grows. Mailinator’s paid tiers are mostly flat: Business is $79 per month billed yearly, Business Plus is $159 per month billed yearly, and Enterprise is custom at $699 and up. That means Debug Mail is cheaper for a tiny team, but Mailinator becomes the more complete buy once you need private inboxes, domains, SSO, or larger message volumes. No usage-based rates were provided, so there are no exact extrapolated usage scenarios here.

Quick answer

Mailinator - Mailinator wins for most builders because its free tier covers both public inbox testing and a broader upgrade path into private inboxes, APIs, webhooks, SMS, and scale, while Debug Mail is better only if you specifically want a simple fake SMTP server for a tiny team.

How the free tiers compare

These products solve overlapping but different testing jobs. Debug Mail is the narrower tool: it is a hosted fake SMTP server centered on capturing outbound email during app development, with a small but usable free tier for one project and up to two team members. Its value is in simplicity and team-shared visibility, but the free plan is capped tightly on collaboration, forwarding, and storage, and the paid plans are seat-based. Mailinator starts broader. The free plan includes unlimited public inboxes, temporary storage, no sign-up, SMS testing, API access, webhooks, routing rules, load testing, and attachments, so it fits more QA workflows out of the box. Its paid path is flatter and more scalable for teams that need private inboxes, domains, SSO, and higher message volumes.

Debug Mail vs Mailinator free tier, side by side

	Debug MailFTV 47	MailinatorFTV 74
Free projects / inboxesDebug Mail free tier is project-based; Mailinator free tier is public-inbox based.	1 project	Unlimited public inboxes
Team members / seats on free tierMailinator’s free public plan is described as no sign-up required, so seat limits are not given.	Up to 2 team members	Not stated for free public plan
Test emails per dayMailinator’s free plan description does not give a message limit in the provided data.	Unlimited	Temporary storage only; no explicit daily cap stated
Forwarding / routingDebug Mail’s free tier has a hard forwarding cap; Mailinator’s free tier exposes routing rules instead.	Up to 1 email per day	Routing rules included
StorageBoth free tiers are limited, but in different ways.	10 MB mailbox storage per team	Temporary storage
SMS testingMailinator includes SMS testing on the free plan.	Not listed	Included

After you outgrow the free tier

Debug Mail’s paid plans are per-seat: Silver starts at $2 per user per month and Gold at $5 per user per month, so costs rise as collaboration grows. Mailinator’s paid tiers are mostly flat: Business is $79 per month billed yearly, Business Plus is $159 per month billed yearly, and Enterprise is custom at $699 and up. That means Debug Mail is cheaper for a tiny team, but Mailinator becomes the more complete buy once you need private inboxes, domains, SSO, or larger message volumes. No usage-based rates were provided, so there are no exact extrapolated usage scenarios here.

Debug Mail next stepSilver - $2 per user per monthPer seat

Mailinator next stepBusiness - $79 per month billed yearlyFlat monthly

When to pick each one

Pick Debug Mail when…

You need a fake SMTP endpoint to catch outgoing mail from an app during local or staging tests.
You are a very small team, and only 1 to 2 people need shared access to a single project.
You want unlimited test emails without paying, and forwarding needs are very light.
You prefer a simple inbox capture workflow over a broader QA platform.
You do not need private inboxes, webhooks, SMS, or load testing.

Pick Mailinator when…

You want free disposable inboxes with no sign-up for quick testing.
You need SMS testing in the same tool as email workflows.
You want API access, webhooks, routing rules, or email load testing on the free tier.
You expect to move into private inboxes, private domains, or SSO later.
You are testing sign-up, OTP, password reset, or other message-driven flows at higher scale.

Bottom line

For most builders, Mailinator is the better free-tier choice because the free plan already covers a wider slice of real testing work, from disposable inboxes to SMS and API-driven QA. Debug Mail is the simpler pick if your main job is capturing outbound email in a small team and you want a lightweight fake SMTP server with unlimited test sends. If you expect to outgrow the free plan, Mailinator also has a clearer path into private inboxes and team features.

Read the full listings: Debug Mail and Mailinator. Scores use the FTV methodology at /ftv. Browse more head-to-heads on /compare, or see the top-ranked free tiers on /top.