Transactional and product email with an API your team wants to use, and deliverability you stop thinking about.
Email Deliverability
Postmark is a transactional email service focused on fast, reliable delivery of application-generated emails like password resets, order confirmations, and notifications.
Price$15+ / month
Starting price: below the category median.
Customer Experience Platforms
In-app chat and messaging API for mobile and web apps with moderation, notifications, and AI chatbot integration.
Price$399+ / month
Starting price: above the category median.
Communication APIs
Twilio is a cloud communications platform that provides APIs for SMS, voice, video, email, and WhatsApp messaging. It enables developers to embed communication capabilities into applications...
PriceUsage-based
Email Marketing
Cost-effective email delivery service combining email marketing campaigns, transactional API, SMTP relay, and advanced deliverability tools.
Price$9+ / month
Starting price: below the category median.
Email Deliverability
Email delivery platform combining a testing sandbox for staging emails with a production sending API for transactional and bulk email delivery.
Price$10+ / month
Price position: below this category's displayed range.Email Deliverability
Global email delivery service with SMTP relay, email API, dedicated IPs, email testing tools, and comprehensive deliverability reporting.
Price$10+ / month
Price position: below this category's displayed range.
Notification Infrastructure
Multi-channel notification infrastructure platform for product teams to design, route, and deliver notifications across email, push, SMS, and chat.
PriceUsage-based
Email Deliverability
Enterprise email delivery platform providing high-volume transactional and marketing email infrastructure with predictive analytics.
Price$20+ / month
Starting price: below the category median.
Notification Infrastructure
Notification inbox and delivery platform offering embeddable notification center, multi-channel delivery, and user preference management via API.
Price$249+ / month
Starting price: below the category median.
Email Management
Transactional email and SMS API by Mailerlite for developers with drag-and-drop template builder, real-time analytics, and inbound email routing.
Price$7+ / month
Starting price: below the category median.
Email Management
Opinionated email service by Basecamp with Imbox screening, Feed for newsletters, and Paper Trail for receipts to rethink email workflows.
Price$9+ / month
Starting price: below the category median.Sales Engagement
Email outreach and tracking tool for small businesses with automated sequences and CRM integration.
Price$19+ / month
Starting price: below the category median.
Communication APIs
Email, calendar, and contacts API platform for embedding communication features into applications.
Price$5+ / month
Email Management
Transactional email management service offering template management, recipient variables, and delivery tracking through a simple API integration.
Price$10+ / month
Starting price: below the category median.
Sales Engagement Platforms
Email productivity and sales engagement platform for Gmail with sequences, templates, scheduling, and real-time tracking analytics.
Price$29+ / seat / month
Starting price: below the category median.
Customer Journey Orchestration
Customer.io is a customer engagement platform that enables marketing and product teams to send targeted, behavior-driven emails, push notifications, SMS, and in-app messages using real-time...
Email Deliverability
Resend is a developer-first email API that provides reliable transactional email delivery with a modern SDK, React email components, and detailed analytics for web application teams.
Notification Infrastructure
Knock is a notification infrastructure platform that provides APIs for building and managing multi-channel notification systems across in-app, email, push, SMS, Slack, and other channels.
