InInbox review
A focused email sender for large-volume campaigns, with basic templates and authentication support.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
InInbox is an email marketing platform from ZIEVO TECNOLOGIA LTDA for businesses that need to create, manage, and send promotional email campaigns. Its published feature set focuses on monthly sending credits rather than contact-count limits, with unlimited contacts on every listed plan. The service includes campaign creation and sending, free templates, email importing in the background, sending history, customizable platform branding, and customer support through tickets and phone channels. It is available on the web and includes a demonstration panel for reviewing the interface before subscribing.
The four plans differ mainly by sending capacity and hourly throughput. ININBOX 1 includes 1,000,000 monthly credits and 2,000 sends per hour. ININBOX 2 raises those allowances to 2,000,000 monthly credits and 3,000 sends per hour. ININBOX 3 provides 3,000,000 monthly credits and 5,000 sends per hour, while ININBOX 4 provides 4,000,000 monthly credits and 6,000 sends per hour. All four plans include unlimited contacts, free templates, sending history, and DMARC, SPF, and DKIM support. The plans are paid, with no free plan listed.
InInbox fits organizations that prioritize sending volume, a large contact database, and core delivery authentication over advanced campaign operations. The listed capabilities do not include verified automation, segmentation, testing, analytics, or integrations, so teams needing those functions should consider a broader email marketing platform. Choose InInbox for straightforward promotional sending with tiered monthly capacity; choose an alternative when detailed audience targeting, workflow automation, performance analysis, or a wider integration ecosystem is central to the selection.
InInbox pros and cons
- Where it wins
- Up to 4,000,000 monthly credits on the listed plans
- Unlimited contacts across all listed plans
- DMARC, SPF, and DKIM support with sending history
- Where it doesn't
- No free plan is available
- Web access is the listed platform
- Automation, segmentation, testing, analytics, and integrations are not listed
InInbox fact sheet, pricing and score →
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