Explore resources

customer experience automation combining transactional email, marketing automation, sales automation, and CRM

Free guide to adding "add to calendar" buttons that work in Gmail, Outlook and Apple Mail: why JavaScript widgets fail in email, how to build Google/Outlook/Yahoo links and a hosted .ics by hand, and links vs .ics attachments.

Email validation and sender-authentication APIs: address validation (format, MX, disposable, role and free-provider flags), a disposable email checker, MX lookup, and SPF, DKIM, DMARC and BIMI record validators. Free plan of 200 credits a month, no card required.

full-stack automation for B2B (marketing, CRM, service desk)

coding guides (not duplicated here)

email marketing software focused on improving open rates

brings the customer data platform, customer journey marketing, and customer journey analytics together to grow your SaaS business

is an email marketing tool that allows you to: create a mailing list and capture data onto it; design newsletters that can be sent to the subscribers on your list; automate your email marketing via use of 'autoresponders' view and analyse statistics related to your email marketing campaigns.

AI outreach agent for link building: finds blog posts where your product fits, writes one plain-text pitch per post and sends it from a separate warmed-up mailbox, with follow-ups that stop on reply

Create beautiful emails, fast.

is a simple email marketing tool for anyone who needs to send personalized email at scale.

Don't waste paying 3-5X more on an expensive email marketing tool

Clean a list before sending: syntax, MX lookup, disposable/role/typo flags and a 0-100 score, DNS only (no SMTP pings). $0.70 per 1,000 emails.

The easiest way to write/grow/build/launch/share/run/ your newsletter

Spam checker, Font Color Adjuster, Blacklist Link Checker, Broken Link Checker, CSS Inliner, HTML Sanitizer, Non-ASCII replacement, Font-Size Adjuster, and more.

is a global technology company that provides an email marketing platform that's easy to use yet extremely powerful

DMARC monitoring that walks you to p=reject: DNS drift alerts, IP threat intel, and free first domain with hosted DMARC.

Email verification API for bulk list cleaning, with disposable, role-based and catch-all detection. REST API and CSV upload; 100 free credits, pay-as-you-go from $5 per 1,000 checks.

Free, no-signup check of a cold email's length, reading level, spam words, links, questions and ask; runs in the browser, open source (MIT).

is the most popular WordPress theme specific online resource which serves over 1 million pageviews each month

effective email marketing and other online marketing campaigns to meet business goals

is the go-to marketing hub for creators that helps you grow and monetize your audience with ease

Build your dream messaging workflows (send targeted emails, push notifications, and SMS (Indie Hacker))

marketing automation with email, SMS, and loyalty workflows

Find the best GTM APIs. We benchmark all the GTM APIs and we put the results on our website.

Newsletters and transactional email for small software teams, billed by emails sent with unlimited subscribers

Free SPF, DKIM and DMARC checkers, plus DNS/WHOIS lookups and email-header analysis; no signup.

ecommerce automation and personalized campaigns

email delivery for transactional sending

Offline HTML campaign QA with machine-readable JSON and client-readable Markdown reports.

Free, no-signup check of whether anyone can send mail as your domain: reads SPF, DMARC, common DKIM selectors and MX from public DNS in your browser and explains each gap in plain words. MIT, open source. ([source](https://github.com/Stephen-Psaradellis/email-forgery-check))

Bulk list cleaning before a send: syntax, MX, disposable, role and free-provider checks with typo suggestions; no SMTP probing. Pay per use ($0.50 per 1,000 addresses).

Data-backed email marketing skill for AI agents (Claude Code, Codex and others): automation flows, deliverability triage, copy de-slopping, ESP control via MCP with send-safety gates and 19 industry playbooks.

independent feature, deliverability and pricing comparison of Mailchimp, Brevo, Klaviyo, ActiveCampaign, Constant Contact and GetResponse

Analyzes subject-line length, spam triggers, capitalization, punctuation, and mobile and desktop inbox previews.

Validate email addresses in bulk or via API/MCP, pay-as-you-go from $35/10k credits, up to 500 free credits.

Bulk list check: syntax, DNS/MX, disposable, role and free-provider flags; no SMTP probing. Pay per event on Apify: $0.0008 per email ($0.80 per 1,000).

Lints HTML email against 21 clients (Outlook Classic, Gmail, Apple Mail and more) with per-client CSS support, dark mode simulation and copy-paste fixes. Free tier, plus a CLI, GitHub Action and MCP server.

Email marketing made easy

Free tool to check SPF, DKIM, DMARC and mail server configuration. Scores any domain out of 100. No signup required.

Automated RSS email, integrations with Marketo, Pardot, Eloqua, and drag-and-drop newsletter curation tools

a new email marketing service provider that’s built for creators, by creators

The Privacy Friendly Marketing Automation Software

Optimize your Customer Experience with One Powerful Product

is an email marketing platform. It enables to create a valuable marketing list of prospects, partners, and clients, so can develop relationships with them and build a responsive and profitable customer base.

email marketing platform for lists, relationships, and campaigns

AI book drafting app that turns your notes or an outline into a full lead-magnet ebook for opt-ins and nurture sequences, with a cover and Word, EPUB or Markdown download. Paid, 7-day trial (card required); drafts need author review.

Free, no-signup email deliverability audit: SPF, DKIM, DMARC, TLS and IP reputation in ~30s, with a spam-risk score.

Self-hosted Email Marketing Software

AI-native cold outreach and CRM platform with built-in warmup, spam testing, and smart sending limits.

eCommerce email marketing for WooCommerce, Shopify, and EDD Jilt

the all-in-one sales and marketing automation platform designed to help you grow

lifecycle emails for SaaS, written from your website and sent when customers act; free up to 1,000 contacts

A/B testing link shortener: split one campaign link between two destinations and measure which one wins

is a standalone, self-hosted, newsletter and mailing list manager. It is fast, feature-rich, and packed into a single binary. It uses a PostgreSQL (⩾ v9. 4) database as its data store.

Pay-per-call data API for outbound lists: find and verify work emails and phones, enrich companies and people, and search companies from one key and one prepaid balance. Remote MCP server and CLI included; a failed call costs nothing, no subscription.

simply beautiful custom email marketing newsletter templates, design and code email templates for marketing campaigns

Free emailing software

Pricing mailerlite

Create and send beautiful emails without touching a single line of code

Send personalized mass emails with the best mail merge in Gmail

email solution for WordPress and WooCommerce

is an easy to use Email Newsletter Plugin for WordPress

is a self-hosted newsletter app developed in Node. js. It allows you to manage large subscriber lists, generate a new campaign using entry data as message contents, send it to selected subscribers, and track individual click statistics for every link in the message.

is a testing tool and is not designed to deliver emails to real addresses

Bulk and real-time email verification API and MCP server: SMTP, catch-all, disposable and role detection; pay-as-you-go credits that never expire, 1,000 free.

Don't land in spam anymore

Self-hosted Email Marketing Software

is a self-hosted email platform with a Resend-compatible API: transactional sending, audiences and live segments, broadcasts with A/B testing, inbound mailboxes, and deliverability analytics. Runs on Cloudflare Workers in your own account or on a plain Node server, sending through Cloudflare Email Service, Amazon SES, Resend or SMTP.

AI lead finder with email, LinkedIn, WhatsApp and SMS outreach sequences and a built-in CRM

Create branded campaigns, automated flows, and transactional email from the dashboard or through MCP, CLI, and API

Send your newsletters directly from Notion

is an omnichannel marketing automation platform for growth-focused ecommerce businesses

Free, offline check of one sent message's raw headers for RFC 8058 one-click unsubscribe (Gmail/Yahoo bulk sender rule): https List-Unsubscribe, List-Unsubscribe-Post, and DKIM h= coverage. Stdlib Python, MIT.

AI-powered outbound engine as a CLI (`npm i -g overloop-cli`)

Automate your product-led growth

the most powerful email platform that allows you to connect your Amazon SES account and run your email marketing

Free, no-signup SPF lookup counter (limit of 10), DMARC checker, one-pass domain health check (SPF, DKIM, DMARC, BIMI, MX, reverse DNS) and an SMTP bounce code reference.

Create awesome emails with drag & drop simplicity

Responsive HTML email template starter

A simple, plain-English checker for SPF, DKIM, and DMARC records.

Editorial newsletters tool for writers and publishers

White-label outbound email automation for B2B agencies. Multi-channel email + LinkedIn workflows with unlimited sending inboxes and built-in deliverability.

is a self-hosted, Resend-compatible email API and dashboard (AGPL fork of useSend): domains, webhooks, broadcasts and inbound, with a one-line SDK switch from Resend.

keep in touch with customers and grow with less spend

Start a newsletter without money

Email delivery service

is the only all-in-one digital marketing platform empowering B2B and B2C businesses, ecommerce sellers and agencies to build customer relationships through end to end digital marketing campaigns, transactional messaging, and marketing automation.

all-in-one digital marketing with transactional messaging and automation

is a cloud-based marketing solution that allows users to manage email, text messaging and push notifications through a single platform

makes it easy to be a responsible email marketer

is a self hosted email newsletter application that lets you send trackable emails via Amazon Simple Email Service (SES)

lifecycle and transactional workflows for SaaS/product teams

Free Chrome extension: on any online store, see when it last sent a marketing email, how often it sends and its latest subject lines; covers 1,000+ stores, mostly in the Nordics and Germany.

Email list verification with a live SMTP mailbox check: each address comes back valid, risky or invalid with a reason, and catch-all or unconfirmed mailboxes stay risky. Free checks to start, then monthly plans; API and MCP server on paid plans.

Uptime monitoring with DNSBL blocklist checks (Spamhaus, SpamCop and others), SMTP, IMAP and POP3 checks, and a passive inbox check that alerts when a periodic email stops arriving. Open source (AGPL-3.0), self-hosted or hosted with a free tier.

is the world’s first and only predictive email intelligence platform

Drag-n-drop and HTML email builder with 1,690+ responsive templates

Paid newsletters made simple

Email for people with something to say

Ready-to-use templates for pre-show, onsite, and post-show B2B outreach

Privacy-focused encrypted email for mail, contacts, and calendar

Create and send personalized marketing campaing to your users based on their activities and properties. It`s ideal for SAAS

Upscribe Newsletter Creator: Email Capture Sign Up Forms, Marketing & Sequences Tool. No more battling with your email newsletter tool…

Email warmup for Google, Microsoft and SMTP mailboxes plus cold email campaigns, with SPF/DKIM/DMARC monitoring, blocklist checks and inbox placement tests. Free plan.

Type a SaaS's address and get the emails it should send, free and with no sign-up.

outbound email deliverability and sales opportunities

automations/templates/broadcasts sending through your AWS

Open-source email marketing with newsletters, templates, audience lists, and visual automations; supports custom SMTP and managed sending through Amazon SES.

email marketing platform for leads and contacts