debugmail.io is a fake SMTP server for testing outgoing emails in development. See its pricing plans, features, and how it compares for developers.
Category
Automation
Pricing
Freemium subscription billed per user per month, with a free plan (time-limited trial features) and paid Gold and Premium tiers, from Free plan available; paid plans start at approximately 2 US dollars per user per month
Verified
Not yet
Last updated
July 19, 2026
Headquarters
Not publicly disclosed on the official site; third-party company databases list Moscow, Russia
What debugmail.io Does
debugmail.io acts as a fake SMTP server that intercepts outgoing emails from an application in development or staging environments, capturing them in a web-based mailbox instead of delivering them to real recipients.
This lets developers and QA teams verify email content, formatting, and links safely, without the risk of sending test emails to real customers or cluttering personal inboxes.
Team and Project Features
Emails are organized by project, and mailboxes can be shared with teammates, with public links available for individual captured emails to support quick review and bug reporting.
Captured emails can be viewed in HTML or plain text, downloaded as .EML files, and optionally forwarded to a real email address for a final check before release.
Free, Gold, and Premium Pricing
The Free plan includes 1 project, 2 team members, unlimited test emails per day, and 10MB of storage, though the site notes a two-week trial period after which usage is billed at about 2 US dollars per user per month.
The Gold plan (about 5 US dollars per user per month) raises limits to 20 team members and unlimited projects, while the Premium plan removes remaining caps on projects, team members, emails, and forwarding rules; a free Gold-tier plan is also available specifically for open-source projects.
Key Features
Fake SMTP server — Intercepts outgoing application emails during development so they never reach real inboxes.
HTML and plain-text preview — View captured emails in either rendered HTML or raw plain-text format directly in the browser.
Downloadable .EML files — Export captured emails as standard .EML files for use in other clients or for archiving.
Email forwarding — Manually forward a captured test email to a real address for a final visual check.
Shared team mailboxes — Organize captured emails by project and share mailbox access with teammates.
Public share links — Generate a public link to an individual captured email for quick review or bug reports.
Free plan for open-source projects — Offers Gold-tier functionality at no cost specifically for open-source project maintainers.
Team collaboration tools — Supports multiple team members per project with role-based access across plans.
Pros & Cons
Pros
Prevents test emails from accidentally reaching real users during development
Supports both HTML and plain-text preview plus .EML export for thorough email QA
Shared mailboxes and public links make collaborative email review straightforward
Free tier is available for open-source projects with fuller functionality than the standard free plan
Straightforward SMTP-based integration that works with most application mail-sending code
Per-user pricing on paid plans is relatively low compared to many developer-tool subscriptions
Cons
The Free plan converts to a paid rate after a two-week trial period, which may surprise users expecting a permanently free tier
Company founding year, exact headquarters, and team size are not clearly published on the official site
Premium plan pricing is not publicly listed and likely requires contacting sales
Storage limits on Free and Gold plans (10MB and 1GB) may be restrictive for high-volume testing
Roadmap items like IMAP integration and spam-score rating were described as upcoming rather than currently available
Less brand recognition and community documentation compared to larger competitors like Mailtrap
Pricing
Free Free (converts to paid rate after 2-week trial) per user per month
Gold 5 US dollars per user per month
Premium Contact for pricing per user per month
Open Source Free N/A
Frequently Asked Questions
What is debugmail.io used for
It is used as a fake SMTP server to capture and inspect outgoing emails from an application during development, so test emails never reach real inboxes.
Is debugmail.io free
There is a free plan with 1 project and 2 team members, though the site notes a two-week trial period after which usage converts to a paid rate of about 2 US dollars per user per month; a free Gold-tier plan is also offered for open-source projects.
How much do paid debugmail.io plans cost
The Gold plan costs about 5 US dollars per user per month, while Premium plan pricing is not publicly listed and requires contacting the company.
Can I forward test emails to a real inbox
Yes, debugmail.io supports forwarding captured test emails to a real email address for a final review, with daily forwarding limits that vary by plan.
Does debugmail.io support team collaboration
Yes, projects and mailboxes can be shared among team members, and individual captured emails can be shared via public links.
Can I download captured emails from debugmail.io
Yes, captured emails can be downloaded as standard .EML files for use in other email clients or for archiving.
Who operates debugmail.io
The service is operated by WBTech; the company does not publish a founding year or detailed headquarters information on its official site.
What features are planned for debugmail.io
The company has referenced upcoming IMAP integration, spam-score rating, and a dedicated mail-client-style viewer as planned additions.