SMTP2GO

SMTP2GO is a long-running transactional service that focuses on SMTP-relay delivery. Plans are simple, and the public pricing page lists feedback loops, blacklist monitoring, spamtrap detection, and real-time analytics.

Growth work lives or dies on targeting and measurement. What matters is whether behavioral triggers can be built without engineering time, whether the event stream supports attribution past the open, and whether deliverability holds when broadcast volume shares a reputation with product email.

Against behavior-triggered journeys, broadcasts, and winback campaigns measured on revenue, SMTP2GO covers event stream, the suppressions API, and multi-tenant support, and does not cover scheduling and operating track record. Whether that gap matters depends on how central those are to the build.

• Scheduling: No
• Event stream: Yes
• Deliverability: Strong deliverability tooling for an SMTP-first service, including feedback loops, blacklist monitoring, spamtrap detection, and bounce tracking.
• Operating since: 2006
• Suppressions API: Yes
• Best published rate per 1,000: Tiers not published in comparable form
• Multi-tenant: Yes
• Free tier: 1,000/mo permanent
• Starts at: $10/mo for 10,000 emails

Strong deliverability tooling for an SMTP-first service, including feedback loops, blacklist monitoring, spamtrap detection, and bounce tracking.

SMTP relay use cases where deliverability is the primary criterion.