SendMailOS gives you everything — campaigns, automation, pixel tracking, AI writing, and a developer API — all under one roof. Enterprise-grade deliverability, no credit card required.
99.5% inbox placement rate
Trusted across 176+ companies
Worked with 100+ industries
SendMailOS is enterprise-grade email infrastructure built to scale with your business. From drag-and-drop campaigns to behavior-triggered automations, pixel tracking, and a full developer API — everything a serious sender needs is already here.
To be the infrastructure layer that powers email for businesses of every size — reliable, scalable, and built for the way modern teams actually work.
Connect SendMailOS with WordPress, Shopify, WooCommerce, HubSpot, Salesforce, Zapier, and more. Native integrations, webhooks, and a full REST API let you plug into any stack without friction.
Test subject lines, content, and send times against real audience segments. SendMailOS automatically selects the winner and rolls it out — so every campaign is already optimized before the full send.
Build multi-step customer journeys visually — no code required. Trigger workflows from a subscriber joining, a website visit, an email open, a purchase, or a webhook. Add delays, conditions, and branching paths at every step.
Live open rates, click maps, bounce data, device breakdowns, and location insights — all from one dashboard. AI-powered health scoring flags deliverability issues before you hit send.
Open the drag-and-drop email editor, pick from 100+ responsive templates, and build your email without writing code. Configure your sender domain with automated DKIM, set your schedule, and you’re ready to send.
Create visual workflows triggered by any subscriber action or website behavior tracked by the pixel. AI-powered send timing delivers each email when your audience is most likely to engage.
Monitor every campaign in real-time from the SendMailOS dashboard. Track opens, clicks, bounces, and conversions per subscriber. Compare A/B variants and use engagement data to sharpen every future send.
SendMailOS integrates natively with the platforms your business already runs on. WordPress, Ghost, Shopify, WooCommerce, Stripe, Zapier, Slack, Salesforce, HubSpot, Notion, Webflow, and Segment. Don’t see your tool? The REST API and webhooks connect anything.
Switching to SendMailOS replaced three separate tools we were paying for. The visual workflow builder is that good. Open rates climbed 40% in the first month alone.
Marketing Manager
I manage campaigns for multiple clients from a single Agency Workspace — separate domains, subscribers, and reporting per client, all under one login. Cleanest agency setup I’ve used.
Business Owner
The pixel tracking is what sold us. We trigger automated sequences based on exactly what pages subscribers visit. The abandoned cart recovery workflow alone covers the subscription cost ten times over.
CRM Specialist
The REST API is exactly what our dev team needed. Clean endpoints, real webhooks, solid documentation. Transactional emails were running from our app in under an hour.
Product Manager
The AI health scoring caught deliverability problems in our copy before we ever sent. Inbox placement went from 87% to 99% in two weeks. That’s not a tool you move away from.
Growth Marketer
The AI Copilot generates subject lines and full email drafts that actually match our voice. We remix blog posts into newsletters in minutes. Email day went from a chore to something we look forward to.
Content Strategist
Our free Free plan includes 1K emails per month with up to 500 subscribers.
Each plan has a subscriber limit. Free includes 500 subscribers, Starter includes 5K subscribers, Growth includes 25K subscribers, Pro includes 100K subscribers.
Yes! Start with our free plan to explore the platform. When ready, upgrade to unlock more features and higher limits.
We maintain a 99.5% average delivery rate thanks to our infrastructure built on AWS SES, proper domain authentication, and reputation management. We also provide tools to help you maintain good sender reputation.
Absolutely! We provide migration tools and guides to help you import subscribers, templates, and campaigns from providers like Mailchimp, SendGrid, and others. Our support team can assist with complex migrations.
Yes, our API supports both marketing and transactional emails. Transactional emails are prioritized separately to ensure immediate delivery for password resets, order confirmations, and other time-sensitive messages.
Yes! Our AI Copilot helps you write better emails, generate subject lines, and optimize content. Plans include AI credits - from 10 on Free up to 2K on Pro.
Security is a top priority. We use encryption for data at rest and in transit, offer API key scoping for granular access control, maintain detailed audit logs, and are working toward SOC 2 compliance.
Yes, higher-tier plans include white-label options. You can customize the platform with your branding, use custom domains, and manage multiple client workspaces from a single dashboard.
