- Stars
- 15,547
- License
- MIT
- Last commit
- 1 year ago
GoDormant
Best Email Testing & Sandbox Inboxes Tools
Explore leading tools in the Email Testing & Sandbox Inboxes category, including open-source options and SaaS products. Compare features, use cases, and find the best fit for your workflow.
8 open-source projects · 6 SaaS products
Top open-source Email Testing & Sandbox Inboxes
These projects are active, self-hostable choices for knowledge management teams evaluating alternatives to SaaS tools.
- Stars
- 8,211
- License
- MIT
- Last commit
- 10 days ago
GoActive
MailCatcher
Capture and view outgoing email locally via a simple web UI
- Stars
- 6,703
- License
- MIT
- Last commit
- 1 year ago
RubyDormant
- Stars
- 5,742
- License
- Unknown
- Last commit
- 11 months ago
SCSSStable
- Stars
- 3,695
- License
- BSD-3-Clause
- Last commit
- 7 days ago
C#Active
- Stars
- 3,240
- License
- Unknown
- Last commit
- 7 days ago
C#Active
Recently updated
7 days ago
smtp4dev provides a cross‑platform dummy SMTP/IMAP server with a rich web UI, API, TLS, authentication, multiple mailboxes, and tools for HTML validation and responsive email testing.
Popular SaaS Platforms to Replace
Understand the commercial incumbents teams migrate from and how many open-source alternatives exist for each product.
Mailinator
Disposable email testing inboxes with public and private domains
Email Testing & Sandbox Inboxes
Alternatives tracked
8 alternatives
Mailosaur
Email & SMS testing with disposable inboxes and phone numbers
Email Testing & Sandbox Inboxes
Alternatives tracked
8 alternatives
MailReach
Email warm-up and spam testing to boost inbox placement
Email Testing & Sandbox Inboxes
Alternatives tracked
8 alternatives
MailSlurp
Disposable inbox & email testing API for end-to-end QA
Email Testing & Sandbox Inboxes
Alternatives tracked
8 alternatives
Mailtrap Email Sandbox
Safe testing inboxes for catching, inspecting, and debugging emails
Email Testing & Sandbox Inboxes
Alternatives tracked
8 alternatives
Warmup Inbox
Automated email warm-up and deliverability monitoring
Email Testing & Sandbox Inboxes
Alternatives tracked
8 alternatives
Most compared product
8 open-source alternatives
Mailinator provides instant disposable inboxes for QA with public addresses and private domains. Teams can capture and inspect messages safely in test environments via web UI and API/SMTP, validate links and content, manage retention and access controls, and integrate with CI pipelines for automated end-to-end tests.
Leading hosted platforms
Frequently replaced when teams want private deployments and lower TCO.
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