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SENDMAILOS SUBSCRIBERS
Know your audience and send to exactly the right people
Import & Sync
Bring your existing list into SendMailOS in seconds. Import via CSV, connect through the API, or sync directly from your CRM or eCommerce platform.
Custom Attributes
Store any data point against a subscriber — name, plan, location, purchase history, or anything custom to your business. Use it to personalize every send.
Tags & Segments
Organize your audience with tags applied manually or automatically by workflows. Build powerful segments using any combination of attributes, behavior, and engagement data.
Powerful Filtering
Filter your subscriber list by open history, click activity, tags, custom fields, signup date, or workflow status — then target that exact group with pinpoint precision.
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SUBSCRIBER TOOLS
Every tool you need to manage and grow your audience
The Best
List Management
- ✓CSV import & API sync
- ✓Duplicate detection
- ✓Bulk subscriber actions
Smart Segmentation
- ✓Attribute-based segments
- ✓Engagement-based filtering
- ✓Dynamic segment updates
Seamless Integration
- ✓CRM & eCommerce sync
- ✓REST API subscriber management
- ✓Webhook-triggered updates
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TRUSTED BY THOUSANDS
Growing businesses rely on SendMailOS to manage their audience
From solo creators to agencies managing multiple client lists — SendMailOS gives every team the segmentation and subscriber tools they need to send smarter.
24K+
Active Users
Growing +12% month over month
Happy clients
Delivered high-impact emails
80%
Across all subscriber segments
Emails Delivered
Reliable high-volume delivery
156K+
Monthly sends
Inbox Placement Rate
★★★★★
(5.0/5.0)
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