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Sidemail is an all-in-one email delivery platform for startups that makes sending emails simple. It has everything for delivering and managing emails – email API, transactional emails, email marketing and automation, contact management, no-code email editor, email templates, subscribe forms, and more. Perfect for teams & developers that want reliable deliverability without the bloat. We're based in the EU and GDPR compliant. | Email Deliverability Solutions (Analytics + Managed Services). We’ve helped 16,000+ companies like TikTok & HSBC land over 30B emails in customer inboxes. |
Email API, Send transactional emails, Newsletters & Product updates, Email automation, Contact management, Subscribe forms, No-code email editor, Premade email templates, Markdown emails, Email MCP server, Own sending domain, DKIM, SPF, Email dark mode, Send emails with Node.js, Express.js, Next.js, PHP, Laravel, Symfony, Slim, Python, Django, Flask, FastAPI, Ruby, Ruby on Rails, WordPress | Deliverability monitoring |
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Litmus is a testing service for web and marketing professionals. It allows people to cross-browser test their websites, and test their email newsletters across a range of email clients and spam filters.

mailparser.io is a web-based email processing software which allows you to pull any kind of data from incoming e-mails based on custom parsing rules. The parsed data can be sent to any API with webhooks.

Email on Acid is the most affordable, self-serve email testing platform in the world. We can help you maximize the success of your email marketing efforts by diagnosing and improving your renderability, deliverability, click-throughs and conversions.

We offer one platform that covers all email-related needs in one place: testing, sending, and in-depth tracking to control how email infrastructure works and performs.

A full-featured email creation and transfer class for PHP. It is a class library for PHP that provides a collection of functions to build and send email messages. PHPMailer supports several ways of sending email: mail() , Sendmail, qmail & direct to SMTP servers.

Disposable email and fake email capture for QA and development teams

Mailinator is a disposable email service that allows QA departments to test with 1000's of inboxes.

Is an AI-driven multichannel outreach platform that reaches prospects where they're most active while keeping every message personal, timely, and effective.

Free email checker and email verification with 99.9% accuracy. Reduce bounces, protect sender reputation. 100 free email verification credits daily.

Kipplo is a B2B contact data and enrichment platform built for sales, marketing, recruitment, and growth teams. It provides access to a large global database of business contacts and company profiles. Access 500M+ verified B2B contacts worldwide, including key decision-makers. Scale your outreach and accelerate deal closures. Teams use Kipplo to search, reveal, and export verified emails and phone numbers, enrich datasets using a credit-based model, and integrate contact data into their workflows using secure API access. All data is maintained in compliance with GDPR and CCPA, supporting responsible and privacy-compliant outbound, prospecting, and research activities.