Email delivery priced by dedicated sending-cluster capacity.
What is PostShiba?
PostShiba offers email delivery through sending clusters with fixed capacity limits. Plans are selected by the throughput a workload needs. Both the busiest hour and the rolling 24-hour sending volume matter.
The service is currently an invitation-only beta with a separate production approval process. Marketing and transactional email require separate clusters. When a cluster reaches its capacity, excess sends are throttled rather than billed as per-message overages.
Official details: https://www.postshiba.com/pricing ; https://www.postshiba.com/use-cases
Pricing: Fixed monthly cluster fees rather than per-email overages. Invitation-only beta access and production approval are required. Pricing checked October 26, 2026.
Features
- Email delivery API
- Fixed-price sending clusters
- Hourly and rolling daily quotas
- Separate marketing and transactional clusters
FAQs
Common questions about PostShiba
Can anyone immediately send production email?
What happens when a cluster reaches its limit?
Insights
Traffic and momentum for PostShiba
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