Email & Notification APIs
Cloud-based email sending and receiving service integrating via API or SMTP for transactional and marketing messages at scale.
A customer engagement platform for automating personalized messaging and lifecycle marketing based on behavioral data.
Email verification service for real-time validation, bulk list cleaning, and sender reputation protection.
Agentic customer engagement infrastructure for lifecycle and transactional messaging across email, in-app, push, SMS, and chat.
Email sending platform for SaaS teams to manage marketing, product, and transactional emails with API and workflow support.
Developer-focused transactional email, SMS, and WhatsApp API and SMTP relay service with real-time delivery tracking and webhooks.
Transactional email delivery service providing APIs for sending, validating, and optimizing email campaigns.
Open-source communication infrastructure to notify users and connect AI agents across multiple messaging channels via a single API.
Open-source transactional email platform supporting automated workflows, marketing campaigns, and unified contact management.
Fast and reliable transactional email delivery service and API for developers, focusing on high inbox deliverability and message streams.
A collection of unstyled components for building emails using React, Tailwind CSS, and TypeScript with cross-client compatibility support.
Email platform for developers to send transactional and marketing emails at scale with a focus on deliverability.
Email validation platform to clean lists, verify addresses in real-time, and protect sender reputation.
Cloud communications platform providing APIs for SMS, voice, email, and conversational AI services.