Email infra for
builders.
High-throughput batch processing for modern engineering teams. No fluff, just deliverability.
Active Campaign
Newsletter_Batch_Q4
Queue
84.2% SENT
Feature_Set_01
Batch Sending Engine
Avoid ISP throttling with worker-based Redis queues. Randomized delays mimic human-like sending patterns at any scale.
Feature_Set_02
Sender Health
Automated SPF, DKIM, and DMARC verification. Real-time feedback loops on your sender reputation across major mailbox providers.
Feature_Set_03
Warm-up Assistant
Gradually ramp new domains and IPs. Adaptive throttling protects deliverability while you scale to millions.
Feature_Set_04
Developer API
Send, list, schedule. A first-class REST API with typed SDKs, idempotency keys, and per-route rate budgets.
Network_Stats
Pricing
Pro Plan
Scale up to 1M emails
- Dedicated IP support
- Advanced automation rules
- API access (Unlimited)
- Warm-up automation
- Priority support
CLI_Preview
$ zobosend auth login
// Authenticating...
$ zobosend send --batch quarterly_updates.json
[INFO] Initializing worker pool (8 threads)...
[INFO] Validating recipients (142,839)...
[QUEUE] 1,402 emails pending dispatch
Common_Questions
How does batch sending protect deliverability?+
We split campaigns into worker-managed batches with randomized delay windows, staying inside ISP rate limits.
Which providers can I connect?+
Resend, Amazon SES, Mailgun, Postmark, and any custom SMTP endpoint.
Is there a free tier?+
Yes — 3,000 emails per month, one verified domain, full API access.