Connect your email provider, manage subscribers, build beautiful newsletters, and track every open — without vendor lock-in or per-email markup.
Works with your stack
Three steps from signup to your first campaign sent.
Add your Resend, SendGrid, or SMTP credentials in under 60 seconds.
Upload a CSV or add manually. Lists and tags organized automatically.
Build in the editor, preview on mobile, then launch your campaign.
From subscriber management to delivery analytics — one platform, your infrastructure.
Connect Resend, SendGrid, SES, Mailgun, SMTP and more. Zero lock-in.
CSV import, segmentation, custom fields, tags, and list management.
Rich editor, drag-and-drop blocks, templates, autosave, mobile preview.
Open rates, click tracking, bounce analysis, and delivery stats.
Drip sequences, welcome journeys, re-engagement campaigns, splits.
RBAC roles, API keys, audit logs, GDPR-ready, multi-workspace.
“Finally a newsletter tool that doesn't force me onto their email infra. We use our own SES and save thousands.”
“Set up our welcome automation in 20 minutes. The visual builder is cleaner than anything we've tried.”
“Our agency manages 12 client newsletters from one dashboard. BYOP is a game changer.”
Start free. Scale when you're ready.
You connect your existing email service and NewsletterOS handles subscribers, campaigns, analytics, and automations — emails go through your own account.
No. The free plan lets you send up to 3 campaigns per month with 1,000 subscribers.
Yes. Import your subscriber list via CSV and reconnect your email provider. Most teams are live within an afternoon.
We use industry-standard encryption, RBAC access controls, and never store provider API keys in plain text.
Connect your email provider and launch your first campaign in under 5 minutes. No credit card required.