Send to Millions. Open Rates That Matter.

Standard is the complete email + SMS automation platform. Pro $99/mo adds an intelligence layer that almost no marketing tool ships — starting with Answer-Engine Optimization.

Answer-Engine Optimization (AEO) suite: Buyers increasingly ask ChatGPT, Perplexity, and Gemini instead of typing a query into Google. The AEO suite tracks your brand's AI visibility — where and how you surface in LLM answers, which sources get cited, and your share-of-voice against competitors across the major answer engines. When a rival starts appearing in questions you used to own, or an AI repeats stale information about your product, you see it. Optimizing for AI answer engines is a genuine first-mover advantage: the discipline (sometimes called generative engine optimization) is where SEO was two decades ago.

Autonomous lead scoring (SDR agent): An always-on agent scores inbound leads against behavioral and demographic signals so your team works the hottest prospects first — no manual triage.

AI reply + sentiment analysis (attribution agent): Inbound replies are read, scored for sentiment, and attributed back to the campaign that earned them — closing the loop between a send and the conversation it started.

Everything in Standard is included, unchanged. Pro is purely additive — flat per-workspace, unlimited contacts and users, same as Standard.

The email editor isn't a WYSIWYG that produces unpredictable HTML. It's a visual node canvas that compiles to MJML — the industry-standard email template language that guarantees rendering across clients.

How it works:

The editor serializes your visual layout into MJML, the industry-standard email markup language, then compiles it into standards-compliant HTML tuned for every major client:

• Gmail: Responsive tables, inline styles, web-safe fonts
• Apple Mail: Full CSS Grid/Flexbox support, dark mode aware
• Outlook: VML fallbacks for backgrounds, box-shadows, and rounded corners (the infamous Outlook rendering issues)
• Yahoo: Clean MIME types, proper alt-text on images

Handlebars dynamic content: Inside any text block, use {{#if user.rfm.isChampion}} syntax. Conditions are evaluated per subscriber at send time — not when you save the template. This means a single MJML template renders as many personalized versions as you have recipients, each with subscriber-specific names, product recommendations, and conditional content.

A/B test in one email:

Subject line A: "Your cart is waiting, {{firstName}}" Subject line B: "Don't leave your cart behind"

Both compiled from the same visual layout. Wilson Score evaluates which wins.

Most email platforms declare a winner when one variant has a higher open rate. This is mathematically incorrect.

The problem: Variant A gets 2 opens from 2 sends = 100% open rate. Variant B gets 1,900 opens from 2,000 sends = 95% open rate. Naive comparison says A wins. Wilson score says B wins with high confidence, because A's 100% is a statistical artifact of a tiny sample.

How it works: Instead of comparing raw percentages, we calculate a lower-bound confidence interval (95% confidence) for each variant's true performance. A variant only wins when its lower bound clearly beats the alternative's — not just when its raw rate happens to be higher.

Auto-selection: A winner is only auto-selected once the lead is statistically meaningful — not the moment one variant's raw numbers look better. No automatic winner until the math is confident.

Suppression list: Maintained per tenant. Addresses are added to suppression when:

• Hard bounce received (from webhook event)
• Subscriber unsubscribes
• Subscriber files a complaint (Gmail/Outlook feedback loop)
• GDPR deletion requested (anonymized, not hard-deleted)

Before every send, the suppression list is checked. Fail-open design: if the suppression lookup fails due to a transient issue, the email proceeds rather than stalling a million-subscriber campaign. The failure is logged; the send is not blocked.

GDPR flow: When a deletion is requested, email, name, and IP are hashed with SHA-256. Historical analytics retain all conversion data; the original PII is irrecoverable.

Unsubscribe (RFC 8058): Gmail, Yahoo, and Outlook honor a one-click unsubscribe header — the recipient clicks "unsubscribe," done. No "click here to unsubscribe" landing page required.