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. Own your data. Built for developers, support, and operations 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.
- 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
Investigate missing, delayed, malformed, or rejected emails with the technical context needed to resolve customer issues quickly.
- 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.
Kurrier sits on top of your existing email infrastructure and brings inspection, delivery tracing, debugging, replay, automation, and team collaboration into one 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.
- Replay and automate
- Replay failed messages, create rules, trigger webhooks, and connect Kurrier to your internal systems and workflows.
- Investigate as a team
- Assign ownership, set priorities, add comments, and keep a complete activity history when an email issue needs collaboration.
Pricing
Simple, predictable pricing
Inspect, trace, debug, replay, and collaborate across your email infrastructure without changing providers.
Free
For individuals, developers, and small projects exploring Kurrier.
- 1 user
- 1 personal workspace
- Unlimited 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
Starter
Most popularFor teams investigating, debugging, and managing email together.
- Includes 3 users
- Everything in Free
- Shared email workspaces
- Full message inspection
- Raw EML retention
- SMTP and delivery diagnostics
- Authentication and routing details
- Message replay
- Collaborative assignments and priorities
- Shared internal comments
- Team activity history
- Role-based access control
- Unlimited email identities
- Bring your own email provider
- API access
- Webhooks
- 10 GB email storage
- Email support
Teams
For larger teams that need more storage, control, and operational visibility.
- Includes 10 users
- Everything in Starter
- Advanced team permissions
- Extended delivery history
- Identity and domain monitoring
- Provider health visibility
- Advanced rules and automation
- 50 GB email storage
- Priority support
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.
Free workspace included. Bring your own provider. No migration or provider lock-in.