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Mailrelay

The largest free email marketing platform with up to 80,000 monthly emails and 20,000 contacts at no cost·mailrelay.com

Mailrelay is a cloud-based email marketing platform that lets businesses create, send, and track email campaigns using a drag-and-drop, AI-assisted editor, automation workflows, and detailed analytics. It offers what it calls the largest free plan in the industry, allowing users to send up to 80,000 emails per month to up to 20,000 contacts at no cost. Beyond email, it also supports SMS marketing, WhatsApp campaigns, transactional emails via SMTP/API, and landing page creation, with a REST API for custom integrations.

What it's for

Sending email newsletters and marketing campaignsTransactional emails (order confirmations, password resets, invoices, shipping updates)SMS marketing campaignsWhatsApp marketing campaignsBuilding landing pages with conversion trackingAutomation workflows (welcome emails, drip campaigns, abandoned cart)A/B testing of subject lines and sendersContact segmentation and list management

Features 18

A/B testing of subject lines and senders
AI-powered drag-and-drop email editor
Automatic list cleaning and contact import
Automation workflows (welcome emails, drip campaigns, abandoned cart, birthday/date triggers)
Contact scoring
Contact segmentation, groups, tags, and custom fields
Import contacts from CSV or directly from Mailchimp
Landing page builder with conversion tracking
Public campaign archive
Real-time analytics (open rate, clicks, heatmap, click-through rate, bounces)
REST API and webhooks for custom integrations
Roles, permissions, and audit trail for account users
RSS campaigns
Scheduled sending across timezones
Signup/subscription forms
SMS marketing campaigns
SMTP server for transactional or high-volume sending
WhatsApp marketing campaigns

At a glance

free tierfree trialAPI

TypeWeb app

DeploymentCloud

PlatformsWeb

LanguagesEnglish, Spanish, Portuguese

ForSMEs, startups, non-profits, freelancers, content creators, large enterprises

CompanyCPC SERVICIOS INFORMATICOS SL

Integrations

MailchimpMeta (WhatsApp)

Resources

Docs

Pricing

Standard and Enterprise plan prices depend on the monthly email volume chosen via an interactive slider (from 25,000 to 10,000,000 emails/month); exact euro amounts for a given volume are not shown as fixed text. Prepaid packages (one-time payment, no subscriber limit) are offered as an alternative to subscription billing.

FreeFree

Transactional emails via SMTP & API: 30-day trial then +€14.95/mo add-on. WhatsApp campaigns: 10-day trial then +€9.95/mo add-on.

80,000 emails/month; 20,000 contacts stored

StandardQuote

Exact price depends on volume chosen via an interactive slider; billed monthly or annually (annual billing saves 10%). Open & click tracking not included.

Price and contact/email limits vary by the monthly sending volume selected (from 25,000 up to 10,000,000 emails/month)

EnterpriseQuote

Marked 'Most Popular'. Exact price depends on volume chosen via an interactive slider; billed monthly or annually (annual billing saves 10%).

Price and contact/email limits vary by the monthly sending volume selected (from 25,000 up to 10,000,000 emails/month)

PrepaidQuote

Alternative to Standard/Enterprise subscriptions for occasional or one-off campaigns instead of regular monthly sending.

Limited by number of email credits purchased, not by contact/subscriber count

Annual billing saves 10% compared to monthly billing