Email observability, debugging & collaboration across every provider

The observability platform for transactional email.

Inspect raw messages, trace delivery, debug SMTP and headers, replay failures, monitor identities and domains, and collaborate from one workspace across SES, Mailgun, Postmark, and SMTP.

Bring your own provider, or host email on your domain with Kurrier Mail. Built for developers, support, and operations teams.

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Kurrier Mail hosting is available in Preview on Starter and Teams.

Email observability

Understand every email, end to end.

Email failures are usually scattered across provider logs, raw message files, SMTP responses, DNS tools, and support conversations.

Kurrier brings the complete message, delivery journey, technical details, and team activity into one workspace—so developers, support teams, and operations teams can see exactly what happened and act quickly.

Kurrier email inspection and delivery observability workspace

Inspect every email.: View the rendered message, raw source, plain text, headers, SMTP details, attachments, and structured JSON in one place.
Trace and debug delivery.: Follow each message from receipt to delivery, identify failures, inspect routing, verify authentication, and replay messages when needed.
Work together across providers.: Bring SES, Mailgun, Postmark, SMTP, and other email infrastructure into one workspace with assignments, comments, priorities, and activity history.

Built for the teams behind email

Who is Kurrier for?

Kurrier is built for developers, support teams, and email operations teams that need to understand what happened to every message—not just whether it appeared in an inbox.

Inspect, trace, debug, replay, and collaborate across all of your email providers from one workspace.

Developers: Inspect rendered content, raw source, headers, SMTP metadata, attachments, and structured message data without switching between tools.
Customer support teams: Connect your existing support inbox or create support@ on your domain with Kurrier Mail. Investigate delivery issues and collaborate on customer conversations in one workspace.
Email operations: Monitor identities, domains, providers, and delivery activity across SES, Mailgun, Postmark, SMTP, and other email infrastructure.
Deliverability & security: Trace delivery routes, inspect authentication results, review message headers, and identify SPF, DKIM, DMARC, and routing problems.
Cross-functional teams: Bring developers, support, and operations into one workspace with assignments, priorities, comments, and complete activity history.
Failure recovery & automation: Replay failed messages, route incoming email, and connect Kurrier to existing systems through rules, APIs, webhooks, and integrations.

How Kurrier works

Everything about every email, in one place.

Connect your existing email infrastructure or host addresses on your domain with Kurrier Mail. Bring message inspection, delivery tracing, debugging, automation, and team collaboration into one workspace.

Kurrier email inspection, delivery tracing, and debugging workspace

Works with your infrastructure: Connect Amazon SES, Mailgun, Postmark, SMTP, and other providers without migrating your email or changing how it is sent.
Inspect every message: View the rendered email, HTML, plain text, raw source, headers, SMTP details, attachments, and structured JSON in one place.
Trace delivery: Follow each message from receipt through processing and delivery, with a clear timeline of what happened at every stage.
Debug authentication and routing: Inspect SPF, DKIM, DMARC, Received headers, message routes, and provider responses when delivery does not behave as expected.
Investigate as a team: Assign ownership, set priorities, add comments, and keep a complete activity history when an email issue needs collaboration.
Email hosting on your domain: Create shared email addresses with Kurrier Mail, including guided DNS setup, delivery reports, and sending health. Available in Preview on Starter and Teams.

Pricing

Simple, predictable pricing

Inspect, debug, and collaborate across your existing email infrastructure, or host email on your domain with Kurrier Mail.

Free

For individuals, developers, and small projects exploring Kurrier.

$0/workspace/month

1 user
1 personal workspace
Unlimited connected email identities
Bring your own email provider
Email preview and source inspection
HTML, plain text, headers, and JSON views
Basic delivery timeline
Assignments and priorities
Internal comments
Activity history
API access
2 GB email storage
Community support

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Starter

Teams

For larger teams that need more storage, control, and operational visibility.

$29/workspace/month

Includes 10 users
Everything in Starter
Everything in Starter, with higher limits
Up to 15 hosted domains
Up to 100 hosted email addresses
Send to 2,000 recipients per day
Advanced team permissions
Extended delivery history
Identity and domain monitoring
Provider health visibility
Advanced rules and automation
50 GB email storage
Priority support

Choose Plan

Kurrier Mail hosting is included on paid plans during Preview. Hosted addresses are shared with all workspace members. Domain, address, storage, and sending limits apply per workspace. Sending allowances count recipient attempts across To, Cc, and Bcc: up to 20 recipients per minute on Starter and 50 on Teams. Connected identities use your own provider’s sending limits.

Need another workspace? Create one anytime. Each workspace has its own members, identities, permissions, storage, rules, API keys, webhooks, and billing.

Frequently asked questions

See what happened. Fix what went wrong.

Bring every email investigation into one workspace.

Inspect messages, trace delivery, debug headers and SMTP, replay failures, and collaborate across your existing email providers without changing your infrastructure.

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Free workspace included. Bring your own provider. No migration or provider lock-in.