The directory

The best AI email marketing tools

An independent, ranked directory. We weigh generation and design quality, automation depth, deliverability, analytics, and value, and we're explicit about who each tool is for. Ratings are editorial, not sponsored.

Brew

AI-native ESP

An AI-native ESP that generates on-brand email from a prompt.

Best for: Teams that want design-quality email and automations without a designer

Free, then paid tiers (watermark removed, latest models, HTML export)

Klaviyo

Ecommerce marketing platform

The ecommerce standard for revenue-driven email and SMS.

Best for: Shopify and WooCommerce brands that want revenue attribution and predictive analytics

Free up to 250 contacts; email from ~$20/mo (500 contacts), scaling with list size

Resend

Developer / transactional API

Developer-first transactional email with React Email templates.

Best for: Engineering teams sending transactional email from code

Free 3,000 emails/mo; paid from ~$20/mo

Customer.io

Multi-channel automation

Event-driven messaging built for SaaS and product-led growth.

Best for: SaaS teams with engineers who own event instrumentation

Essentials from ~$100/mo (5,000 people); scales with people + volume

Mailchimp

All-purpose marketing

The familiar, broadcast-first platform for small businesses.

Best for: Small businesses that want a recognizable, simple, multi-channel starting point

Free up to 500 contacts; paid plans scale by contacts and features

Loops

SaaS lifecycle

Lifecycle and broadcast email built for SaaS, in one platform.

Best for: SaaS teams that want transactional and marketing email together

Free transactional + 1,000 subscribers; paid from ~$49/mo

Methodology: we test each tool on real brands and workflows, read the vendor documentation and pricing, and cross-check against independent analyses. See our about page for how we rate.