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Automatically upgrades your outbound user notifications to use the best channel for each user. Email, mobile push, in-app, SMS, or chat — all from a single API. | It is an open source IMAP and POP3 email server for Linux/UNIX-like systems, written with security primarily in mind. It is an excellent choice for both small and large installations. It's fast, simple to set up, requires no special administration and it uses very little memory. |
Drag & drop content without writing code;
Consistent rendering across every email client;
Re-use content for any channel;
Consistent branding across all your notifications | Flexible authentification; Easy migration; Self-optimizing |
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Stacks 18 | Stacks 51 |
Followers 22 | Followers 52 |
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Integrations | |

OneSignal is a high volume push notification service for websites and mobile applications. OneSignal supports all major native and mobile platforms by providing dedicated SDKs for each platform, a RESTful server API, and a dashboard.

PushCrew enables any website to send push notifications to their users (even when they are not on the website). A simple JavaScript code makes it working on any website in less than 2 minutes. It's a fantastic new alternative to email marketing.

Saastoast sends real-time push notifications for key SaaS events, trial signups, upgrades, feature usage, churn risks, and more, keeping founders motivated and customer-centric by showing momentum as it happens.

It is a push notifications platform for Web and Mobile. It is very fast, GDPR compliant and full-featured. It supports all major native mobile and web platforms, provides a RESTful API and an online dashboard to design notifications and analyze their impact.

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.

Send website notifications directly to the desktop when new content is fresh from the oven.

Free email verifier & checker to validate email addresses instantly. Reduce bounces and verify emails in real time.

Use AI to find prospects that need you, automatically craft personalized cold emails for each, and scale effortlessly

Protect your domain with Dmarclytics. Run free DMARC, SPF, and DKIM checks to stop spoofing, enhance email authentication, and improve deliverability with powerful monitoring tools.

Aepto is an AI-powered domain monitoring platform built to give full visibility and control over domains spread across multiple providers. Instead of logging into separate registrar, hosting, and email dashboards, Aepto centralizes everything into one clean interface and continuously monitors domain health using public signals and AI analysis. Once a domain is added, Aepto automatically scans the registrar, hosting setup, email configuration, pricing, and renewal details—no APIs or integrations required. It monitors email deliverability, DNS records, website and subdomain uptime, content changes, and suspicious activity such as nameserver changes or lock status updates. When something goes wrong, Aepto alerts you early and clearly explains what happened and which provider to contact. Aepto also helps track domain expenses, visualize spending, assign ROI, organize domains into folders, and customize pricing and provider details when needed. Advanced features include AI-powered domain discovery, domain watch for tracking expiring domains you don’t own, distributed uptime monitoring, and customizable white-labeled status pages with incidents and maintenance updates. Designed for businesses, agencies, and teams that rely on domains for live websites, email, and APIs, Aepto focuses on proactive monitoring and clarity—so nothing breaks silently and small issues don’t turn into bigger problems.