Everything you need to build a newsletter

Send your data + guidance via API and get a complete newsletter back — subject line, sections, inline-styled HTML, all generated by AI.

Auto-generated header images matched to your content via Gemini or Replicate Flux. No design skills needed.

Each reader gets content tailored to their profile, tags, and engagement history. Merge tags + AI rewriting at $0.001/email.

Set a daily, weekly, or monthly schedule and let AI generate and send newsletters automatically with optional human approval.

GPT-4o / Gemini generates high-converting subject lines with predicted open rates and A/B variants.

Describe your onboarding flow and AI generates the full sequence — emails, delays, conditions, and CTAs — ready to activate.

12 block types with drag-drop reordering. Say "add a metrics section" and AI creates it. Renders to email-safe HTML.

10 pre-built responsive email templates for welcome emails, digests, product updates, promos, and more.

Rich text editing with formatting, images, links, alignment, and inline HTML. What you see is what your readers get.

Dynamic content with merge tags ({{first_name}}) and conditional blocks. Show different content per segment.

Sends through Resend by default, with self-hosted MailStack as an alternative. Every recipient gets their own email.

Test subject lines and email content with automatic winner selection based on open rate or click rate.

AI analyzes each subscriber's engagement history to determine the optimal send time per person.

Visual rule builder to target by status, tags, engagement score, date, and custom fields.

Schedule campaigns in advance or use recurring schedules for regular newsletters.

Multi-step automated email series with delays, conditions, and branching logic. Activate on signup, tag, or event.

Automatically send a welcome sequence when someone subscribes. Customize per newsletter or list.

Scheduled AI generation with configurable cadence. NewsletterOS generates and queues without any manual action.

AI generates a draft, you review and approve before it goes out. Or skip approval for fully automated triggered sends.

Auto-generate newsletter digests from any RSS feed. Set frequency and format — we handle the rest.

0-100 score per subscriber based on open rate, click rate, recency, and frequency. Auto-update on every send.

Visual overlay showing which links get clicked and how often. Understand what resonates with your audience.

MRR, LTV, churn rate, and revenue per email — all in one dashboard. Track paid subscription performance.

Per-subscriber open-time analytics feed back into send-time optimization over time.

Opens, clicks, unsubscribes, bounces, and spam reports — per campaign and over time with trend charts.

Public landing page per newsletter with signup form, subscriber count, and customizable branding.

Drop a signup widget into any website with one line of code. Customizable styles and success messages.

Built-in subscriber referral tracking with milestone rewards and leaderboard. Grow organically.

Embed rating scales, NPS, and multiple choice polls directly in emails. Results collected automatically.

12 event types (subscriber created, campaign sent, unsubscribe, bounce, etc.) with retry logic and HMAC signing.

Connect to 5,000+ apps via Zapier and Make. Trigger automations on subscribe, unsubscribe, campaign open, and more.

Full API coverage from your app — subscribe, send, segment, and read analytics with a type-safe SDK.

Bring your own domain with automatic DKIM/SPF configuration for best deliverability.

Your app posts data via POST /api/v1/generate — NewsletterOS handles generation, personalization, and delivery.

Enterprise single sign-on with Okta, Azure AD, and any SAML 2.0 or OIDC provider. SCIM provisioning available.

Restrict API and dashboard access to approved IP ranges or CIDR blocks. Per-team or global enforcement.

Complete activity log of all user actions, API calls, and system events. Export as CSV for compliance.

99.9% uptime SLA on Growth plan. Dedicated infrastructure and priority incident response for enterprise.

Role-based access control — admin, editor, analyst. Invite teammates with scoped permissions per newsletter.

Subscriber export, deletion, and consent management built-in. Data stored in your own PostgreSQL database.