Mailtrap restructured in 2025 to Basic $17, Team $42, Business $123, and Enterprise $498 monthly with annual billing roughly 20 percent off. The Free Sandbox dropped from 100 to 50 test emails per month, and the old Individual tier is gone. The cost flips when a focused alternative covers the one capability the team actually uses: open-source self-hosting, deep CI bindings, zero-setup smoke tests, or production inbox-placement scoring.
Where alternatives win
Mailpit is the actively maintained successor to MailHog: MIT-licensed, single Go binary, unlimited inboxes, and zero cost as a self-hosted dev sandbox.
Mailosaur Personal at $20 monthly billed annually covers 15,000 inbound emails per month with first-class Playwright, Cypress, and Selenium bindings for CI-driven email testing.
Ethereal Email is free disposable SMTP credentials with no signup, built by the Nodemailer maintainer, ideal for one-off smoke tests and new-developer onboarding.
GlockApps Essential at $59 monthly runs seedlist tests across Gmail, Outlook, Yahoo, and ProtonMail to confirm whether production sends land in inbox versus spam.
By Subrupt EditorialPublished Reviewed
If you have ever shipped a forgot-password flow that fired real emails into your QA team's inbox, you know why email-testing exists as a category. The problem is not sending mail; the problem is catching it before it reaches a real recipient, inspecting how it renders across clients, and confirming spam scores before going live. Mailtrap solves all three for teams. Lighter tools cover solo work, CI automation, or deliverability scoring better.
The picks split along four lanes the audience actually shops for. Mailpit is the open-source self-hosted lane, drop-in replacement for the archived MailHog with active maintenance. Mailosaur is the CI and QA lane with deep framework bindings that let Playwright and Cypress assert against captured emails. Ethereal Email is the zero-setup lane, disposable SMTP credentials in seconds with no account required. GlockApps is the deliverability lane, measuring whether production mail lands in inbox or spam across major ISPs. smtp4dev sits alongside Mailpit as the .NET-native open-source choice.
The price wall is real but uneven. Mailtrap Basic at $17 monthly sits below the new Team and Business tiers that scale to 50-user organizations. Mailpit and smtp4dev are free as long as you can run a Docker container. Mailosaur Personal at roughly Mailtrap-Basic monthly cost when billed annually solves a different problem and covers far more inbound volume than Mailtrap Team. GlockApps Essential matches Mailtrap Team's monthly rate but answers a question Mailtrap does not ask.
Pick by your actual workflow. Self-hosted OSS dev sandbox: Mailpit. End-to-end tests in Playwright or Cypress: Mailosaur. One-off smoke tests with no install: Ethereal. .NET or Windows-first stack: smtp4dev. Production inbox-placement scoring: GlockApps.
Affiliate disclosure: Subrupt earns a commission when you switch to a service through our recommendation links. This never changes the price you pay. We only recommend services where there's a real cost or feature advantage for you, and our picks are based on the data on this page, not on which programs pay the most.
Quick pick by use case
If you only have thirty seconds, find your situation below and skip to that pick.
Seedlist tests across Gmail, Outlook, Yahoo, and ProtonMail; Essential $59 monthly with 360 spam credits and DMARC analytics.
Skip these picks if: Stay with Mailtrap if your team uses the unified Inbox view as a release gate, has Mailtrap API integration already wired into staging deploys, or relies on the spam analysis as part of QA sign-off.
At a glance: Mailtrap alternatives
Quick comparison across pricing floor, best fit, and switching effort. Tap a row to jump to the full pick.
Best for inbox-placement scoring (does my mail land in spam?)
$0, 2 spam credits/mo
Medium
Feature comparison
Feature
Mailpit
Mailosaur
Ethereal Email
GlockApps
Free tier
✓
trial only
✓
✓
Entry monthly
$0
$20 annual
$0
$59
SMTP capture sandboxCaptures outbound dev email instead of delivering
✓
✓
✓
✗
CI test framework bindingsNative libraries for Playwright, Cypress, Selenium, Postman
~
✓
✗
✗
REST API access
✓
✓
✗
✓
Inbox-placement scoringTests whether production mail lands in inbox vs spam across major ISPs
✗
✗
✗
✓
Team accounts and audit log
✗
✓
✗
✓
Self-hostable
✓
✗
✗
✗
Cost at your volume
Approximate cost per pick at typical use case.
Pick
Solo dev1 use case
Small team CI (5 devs)5 use case
Scale (50-user org)50 use case
Mailpit
Free
Free
Free
Mailosaur
Free
$20/mo
$50/mo
Ethereal Email
Free
Free
—
GlockApps
Free
$59/mo
$99/mo
Modeled at typical workflows. Mailpit and Ethereal stay free across all rows; Mailosaur prices billed annually; GlockApps lives on a different axis (placement scoring) and is shown for comparison.
Mailpit is the modern continuation of the dev-test SMTP capture model MailHog established. Single Go binary or Docker image, MIT-licensed, actively maintained as of this review. The web UI shows HTML, CSS, text, and raw views; the REST API drives programmatic checks; SpamAssassin integration is one config flag away. For developers who self-host their dev stack and do not want a paid SaaS in the loop, Mailpit is a clean fit.
The trade: no team accounts, no audit log, no formal SOC 2 attestation. You self-host the container and self-monitor whether it stays up.
The upside: zero monthly cost, unlimited inboxes, no message caps, and full data control. The whole project fits in a Docker compose service alongside your app.
“I've been using mailhog to catch my development emails for a few years. But noticed that some of the inline images weren't rendered in the mailhog GUI and the mailhog docker image hadn't been updated for a few years. So I've switched to Mailpit.”
Strengths
+MIT-licensed and actively maintained
+Drop-in MailHog replacement with the same default port
+Single Go binary or Docker image
+Unlimited inboxes and no message caps
Trade-offs
−No team collaboration features
−No SOC 2 attestation or audit log
−You self-host and self-monitor
Cost
$0, self-hosted
License
MIT
Stack
Go single binary
Capture
SMTP + IMAP4 + REST API
Migration steps
Pull the axllent/mailpit Docker image or download the Go binary.
Point your app SMTP at mailpit:1025 (the default capture port).
Open the web UI on :8025 and confirm captures arrive with HTML and text views.
Wire SpamAssassin integration if you want spam scoring (one config flag).
Phase out Mailtrap in dev once the team workflow is comfortable.
Not for: Mailpit is the wrong pick when you need a managed SaaS with team accounts, audit logs, or formal SOC 2 attestation.
Mailosaur's value is the framework bindings. Node, Python, Java, .NET, Ruby, and PHP libraries plus framework-aware integrations for Playwright, Cypress, Selenium, and Postman. Tests assert against captured email by querying the API for messages matching subject, sender, or content; the test can pull verification links and complete sign-up flows automatically. SMS testing with real virtual numbers is bundled, useful for OTP and 2FA flows.
The trade: higher entry monthly than Mailtrap Basic, and the learning curve only pays back if you actually drive your tests through it. Manual inspection workflows are not where Mailosaur wins.
The upside: Personal at $20 monthly billed annually covers 15,000 inbound emails per month, several times Mailtrap Team-tier volume at less than half the Team rate. Core at $50 covers 75,000 inbound with multiple inboxes.
Strengths
+First-class CI bindings for Playwright, Cypress, Selenium, and Postman
+Email and SMS testing in one tool
+15K inbound emails on Personal at $20 monthly billed annually
+Webhook automations on Core for advanced flows
Trade-offs
−Steeper learning curve outside CI use
−Personal monthly rate higher than Mailtrap Basic if you only inspect email manually
−Smaller community than Mailtrap
Personal
$20/mo annual, 15K inbound
Core
$50/mo annual, 75K inbound
Free trial
14 days, no card
Frameworks
Playwright, Cypress, Selenium, Postman
Migration steps
Sign up for the Mailosaur 14-day trial (no card required).
Generate a virtual inbox and copy the unique server email address.
Install the language binding for your test stack (npm install mailosaur, pip install mailosaur).
Wire the bindings into your Playwright or Cypress tests; assert against captured email.
Migrate existing assertions and cancel Mailtrap once the CI flow is stable.
Not for: Mailosaur is overkill for a team that only inspects email manually; Mailtrap Basic fits that better at lower cost.
Ethereal Email, built and maintained by the Nodemailer maintainer, generates disposable SMTP credentials on demand. No account needed: load the page, get test SMTP user and password, paste into your app config, send, and click the captured-message preview link. For one-time smoke tests, demos, or first-day onboarding for a new developer, the friction is essentially zero.
The trade: no API, no team collaboration, no message persistence across sessions. This is not a tool a CI pipeline can build on.
The upside: the time-to-first-captured-email is roughly thirty seconds, including reading the homepage. As a permanent smoke-test backup or a single-use tool for a quick demo, it is unmatched on setup speed.
Strengths
+Zero signup, instant test credentials
+Built by the Nodemailer maintainer
+Free with no usage limit
+Works for any SMTP-capable app
Trade-offs
−No API or programmatic access
−Messages are not persisted long-term
−No team collaboration or audit log
Cost
$0
Account
Ephemeral, on-demand
Capture
Web preview only
API
None
Migration steps
Visit ethereal.email and click create account.
Copy the generated SMTP credentials into your app config.
Send a test email and view it via the captured preview link.
Bookmark Ethereal as a permanent smoke-test backup, or move heavier workflows to Mailpit.
Not for: Ethereal is the wrong pick for sustained team testing or CI automation; Mailpit and Mailosaur cover those.
smtp4dev is BSD-licensed and built on .NET; it runs natively on Windows alongside Linux and macOS via Docker. Beyond SMTP capture, it includes an IMAP4 server so dev clients can connect like a real inbox, plus an interactive UI for inspecting messages. For teams whose primary stack is .NET (where Mailpit's Go-first orientation is a slight friction), smtp4dev is a closer fit.
The trade: smaller community than Mailpit, no managed SaaS option, and the UI is less polished than Mailtrap's. It is a developer tool by a single maintainer, not a product team.
The upside: ships as a dotnet global tool, a Docker container, or a Windows binary. The IMAP4 server lets Outlook or Thunderbird connect to the captured mailbox as if it were a real inbox, which is useful for UI testing on Windows.
Strengths
+Native .NET stack, runs on Windows directly
+IMAP4 server lets clients connect like a real inbox
+BSD-licensed and actively maintained
+Cross-platform via Docker
Trade-offs
−Smaller community than Mailpit or Mailtrap
−No managed SaaS option
−Less polished UI than Mailtrap
Cost
$0, self-hosted
License
BSD
Stack
.NET
Capture
SMTP + IMAP4 + REST API
Migration steps
Install via the dotnet tool (dotnet tool install -g Rnwood.Smtp4dev) or pull the rnwood/smtp4dev Docker image.
Point your app SMTP at the smtp4dev capture port (default 25).
Optionally connect Outlook or Thunderbird via IMAP for inbox-style testing.
Phase out Mailtrap in dev once the team is using smtp4dev consistently.
Not for: smtp4dev is the wrong choice when your real need is inbox-placement scoring or team-managed sandboxes; GlockApps and Mailtrap cover those.
GlockApps solves a different problem from the rest of the picks. Not catching dev email, but measuring whether production sends land in inbox versus spam across Gmail, Outlook, Yahoo, AOL, and ProtonMail. The seedlist test sends your message to real-but-monitored addresses and reports placement by ISP. DMARC analyzer, IP and domain reputation monitoring, and uptime checks are bundled.
The trade: this is not a sandbox; it does not replace Mailtrap for dev capture, and the price climbs once your testing cadence is daily rather than weekly.
The upside: GlockApps restructured to credit-based pricing in 2025; Essential at $59 monthly now covers 360 spam credits and 10,000 DMARC messages, a meaningful jump over the previous 10-tests cap. Growth at $99 monthly covers 1,080 credits and 600K DMARC messages for teams running daily placement checks.
Strengths
+Inbox placement across all major ISPs
+DMARC, DKIM, SPF analyzer included
+IP and domain reputation monitoring
+Free tier covers 2 spam credits per month
Trade-offs
−Not a sandbox; does not replace Mailtrap for dev testing
−Free tier dropped from 3 to 2 credits in the 2025 restructure
−No CI integration as polished as Mailosaur
Free
$0, 2 spam credits/mo
Essential
$59/mo, 360 credits + 10K DMARC
Growth
$99/mo, 1,080 credits + 600K DMARC
Enterprise
$129/mo, 1,800 credits + 1.2M DMARC
Migration steps
Sign up for the GlockApps free tier (no card).
Run a seedlist test on your latest production email.
Review the placement report (Gmail Inbox, Promotions, Spam, and so on).
Wire the DMARC analyzer to your sending domain.
Use GlockApps alongside Mailtrap or Mailpit; they solve different layers of the problem.
Not for: GlockApps is the wrong tool when the actual problem is dev-time email capture; pair with Mailpit or Mailtrap for that.
Paid plans from $59.00/mo
When to stay with Mailtrap
Stay with Mailtrap if your team relies on the unified Inbox view, uses the spam analysis as a release gate, or has CI integration against the Mailtrap API already wired in. The picks below favor OSS self-hosting, pure CI integration with major test frameworks, zero-setup smoke tests, .NET stacks, and production inbox-placement scoring rather than dev capture.
Email-testing alternatives split along three axes: dev-time capture (Mailpit, smtp4dev, Mailtrap), CI and E2E automation (Mailosaur, Mailtrap), and inbox-placement scoring (GlockApps). Picks below address each axis. Within capture tools, open-source versus managed SaaS is the second decision; we favor OSS where active maintenance exists (Mailpit, smtp4dev) and SaaS where collaboration matters (Mailtrap).
Pricing is taken from each vendor's site on the review date. Mailtrap restructured tiers in 2025 (Free 50 emails, Basic $17, Team $42, Business $123, Enterprise $498); Mailosaur restructured to Personal and Core in 2025; GlockApps moved to credit-based pricing. We score on price for low-volume usage (most readers), API quality, framework bindings, and active maintenance. We do not factor in vendor-claimed inbox-placement numbers; that is GlockApps territory and a separate question from sandbox capture.
Update history2 updates
Initial published version with 5 picks.
Backfilled to Stage 2 schema. Structured verdict with deep-links to four picks, quickVerdict (five entries plus skipIf), featureMatrix (eight dimensions across mailpit / mailosaur / ethereal-email / glockapps), usageCosts (three workflow levels), per-pick author ratings, and a sourced testimonial. Catalog refreshed: Mailtrap restructured to Basic / Team / Business / Enterprise (Free dropped from 100 to 50 emails, Basic $17 monthly replaced Individual $14.99); Mailosaur restructured to Personal $20 annual / Core $50 annual / Enterprise (replaced Pro $49 / Plus $199 / Business $599); GlockApps moved to credit-based pricing (Essential $59 with 360 credits, Growth $99 with 1,080 credits).
Frequently asked questions about Mailtrap alternatives
Does Mailtrap actually send emails to real recipients?
The Sandbox product does not. Captured messages stay in Mailtrap and never reach the listed To address. Mailtrap also sells a separate Email API for transactional sending; that product does deliver to real inboxes. The two products share an account but bill separately and behave differently.
Why not just use a Gmail account for QA?
Real Gmail rate-limits aggressive sends, flags repeated identical content as spam, leaks PII into long-term Google storage, and routes bounces in ways that do not match a real customer's inbox. Sandbox tools give you isolated, predictable, inspectable captures with no real-world side effects.
Is Mailpit a drop-in replacement for MailHog?
For most teams, yes. Same default SMTP port, similar UI, same use cases. Migration is typically changing the Docker image (mailhog/mailhog to axllent/mailpit) and updating the published port if needed. MailHog's repository was archived in 2021; Mailpit picks up active maintenance and fixes inline-image rendering issues several users have reported.
How does Mailosaur compare to Mailtrap on price for a small CI team?
Mailosaur Personal at $20 monthly billed annually covers 15,000 inbound emails per month with framework bindings; Mailtrap Team at $42 monthly covers 5,000 test emails. For a team driving email assertions through Playwright or Cypress, Mailosaur is both cheaper and better-fitting; for manual QA inspection, Mailtrap Basic at $17 is the closer match.
Can I run inbox-placement tests without GlockApps?
Mailtrap's Email API reports some deliverability metrics; Postmark and SendGrid expose placement-style stats from their own pipeline. GlockApps is the dedicated standalone with seedlist coverage of all major ISPs and a focused DMARC analyzer, which Mailtrap and the transactional ESPs do not match.
How do I test bounce handling and complaints?
Mailtrap and Mailosaur both support simulating bounce events on captured messages. For production, SendGrid and Postmark expose webhook events for hard bounces, soft bounces, and complaint feedback loops; that is the right layer to verify your bounce handling once mail leaves the sandbox.
Ready to switch?
Our top Mailtrap alternative: Mailpit
Mailpit is the actively maintained successor to MailHog: MIT-licensed, single Go binary, unlimited inboxes, and zero cost as a self-hosted dev sandbox.
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