The tool directory
12 email platforms, profiled fairly. We cover AI-native ESPs, the established incumbents, and developer-first infrastructure — with sources you can check. We take no payment for placement.
AI-native spotlight
All platforms
Klaviyo
DTC marketing platform
The default email + SMS platform for DTC ecommerce, with deep Shopify integration and revenue attribution.
Mailchimp
All-in-one marketing suite
The well-known all-in-one marketing platform: email, automations, SMS, and ecommerce integrations under one roof.
Customer.io
Behavioral messaging platform
An event-driven messaging platform for SaaS and product-led teams that triggers messages off any user behavior.
HubSpot
CRM + marketing suite
An all-in-one CRM with a marketing hub: email, automation, and Breeze AI tied tightly to contact and deal data.
Braze
Enterprise engagement platform
An enterprise customer-engagement platform for high-volume, multi-channel messaging across email, push, in-app, and more.
Resend
Developer email API
A developer-first email API with first-class React Email support, clean docs, and a great DX.
Loops
SaaS lifecycle ESP
An all-in-one email platform for software companies, combining transactional, marketing, and lifecycle in one product.
Beehiiv
Newsletter & media platform
A newsletter-first platform with native growth tools: referrals, a recommendation network, ads, and Boosts.
Kit (ConvertKit)
Creator email platform
A creator-focused email platform (formerly ConvertKit) built around tag-based automation and selling digital products.
ActiveCampaign
Marketing automation + CRM
A marketing automation suite with a built-in CRM, known for a powerful automation builder at SMB-friendly prices.
SendGrid
Email delivery infrastructure
The high-scale email delivery platform (now part of Twilio) for transactional and marketing email at massive volume.