Retarus Transactional Email
Retarus Transactional Email: A compliance-oriented delivery service for complex enterprise messaging environments. Ranked #8 of 38 in Transactional Email Software by our editors (6.8/10); pricing: Pricing on request; best for enterprise teams needing compliance-oriented delivery.
At a glance
- Editor score6.8 / 10
- PricingPricing on request
- Best forEnterprise teams needing compliance-oriented delivery
- Delivery methodsBoth
- Founded1992 · Munich, Germany
- Facts checked20 Sep 2026
Where it wins
- Supports both REST API and SMTP delivery methods
- Includes callbacks, webhooks, monitoring, and delivery reporting
- Offers enforced TLS, dedicated IPs, and enterprise integrations
Where it doesn't
- Contact-sales pricing makes budget comparison less direct
- Delivery-log retention varies between monitoring and reporting functions
- The enterprise focus may exceed the needs of simpler sending programs
Our verdict on Retarus Transactional Email
Retarus Transactional Email is an enterprise service for sending high-volume transactional messages from business applications. It supports REST API and SMTP delivery, making it suitable for teams connecting modern applications, established mail systems, or both. Delivery-status callbacks and webhooks, reporting, live email search, bounce and response management, suppression lists, tracking, and enforced TLS address the operational needs of business-critical email. The service is positioned for complex enterprise environments and integrates with SAP, Microsoft, Salesforce, and ServiceNow.
Pricing follows a contact-sales model, so the buying process is oriented toward organizations evaluating requirements with Retarus rather than selecting a published self-service tier. The service can include optional antivirus scanning and secure document handling, alongside optional dedicated sending IP addresses. Regional processing options are available through Retarus-operated data centers in Europe, the United States, and APAC. These capabilities make the product a practical fit for organizations that need delivery controls and regional deployment considerations as part of a broader enterprise setup.
Operational visibility is a notable strength, with live email search, delivery reporting, callbacks, and webhooks supporting message tracking and issue response. Retention differs by function: EAS Live Search covers 45 days, while the GraphQL Reporting API provides a maximum history of 90 days. Teams should choose Retarus when API and SMTP flexibility, enterprise application integrations, transport security, and suppression management matter more than self-service purchasing. Smaller teams seeking a simpler transactional email service or a straightforward plan comparison may find the enterprise-oriented process less suitable.
Retarus Transactional Email pricing
Retarus Transactional Email fact sheet
| Free plan | Not verified |
|---|---|
| Paid from | Not verified |
| Delivery methods | Both |
| Template options | Not verified |
| Event webhooks | Yes |
| Delivery log retention | Not verified |
| Dedicated IP option | Yes |
| Monthly send limit | Not verified |
| Deployment | Cloud, Browser extension |
| Platforms | Web |
| Compliance & security | GDPR, HIPAA, PCI DSS |
| Support | Phone, Docs |
| Built for | Enterprise, Mid-market (editorial estimate) |
| Integrations | 4 integrations: SAP, Microsoft, Salesforce, ServiceNow |
| Pricing | Pricing on request |
| Website | retarus.com |
| Facts checked | 20 Sep 2026 |
Retarus Transactional Email integrations
Retarus Transactional Email lists 4 integrations on its own site.
- SAP
- Microsoft
- Salesforce
- ServiceNow
Alternatives to Retarus Transactional Email
- Twilio SendGridA developer-focused email service with APIs, SMTP, templates, webhooks, and inbound parsing.9.3
- PostmarkA focused email delivery service for teams separating transactional and broadcast traffic.8.6
- Mailchimp Transactional (formerly Mandrill)A paid transactional email service with API, SMTP, templates, and volume pricing.8.3
See all Retarus Transactional Email alternatives →
Retarus Transactional Email vs the competition
- Retarus Transactional Email vs Twilio SendGrid
- Retarus Transactional Email vs Postmark
- Retarus Transactional Email vs Mailchimp Transactional (formerly Mandrill)
- Retarus Transactional Email vs Mailgun
- Retarus Transactional Email vs Infobip Email API
- Retarus Transactional Email vs Plunk
Compare Retarus Transactional Email with any tool side by side →
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Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026
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