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Mailgun is a set of powerful APIs that allow you to send, receive, track and store email effortlessly. | Agora.io provides building blocks for you to add real-time voice and video communications through a simple and powerful SDK. You can integrate the Agora SDK to enable real-time communications in your own application quickly. |
Optimized Queue;Scheduled Delivery;MIME Assembly;Test Mode;ESP Feedback Handling;Unsubscribe Handling;Spam Complaint Handling;Bounce Handling;HTTP POST to your App;Routing w RegEx Filters;Parsing to UTF-8;Signature Separation;Quoted Reply Separation;Wildcard Domains;Spam Filtering;Live Logs;Message Tagging;Event Webhooks;Open/Click Tracking;Unsubscribe Tracking;Complaint Tracking;Bounce Tracking;Mailing Lists;Template Variables;A/B Testing;Link Performance;Geo Performance;Recipient Level Data;SMTP or HTTP API;Clean IP Addresses;SPF Authentication;DKIM Authentication;SSL/TLS;Scales on Demand | - |
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Stacks 7.8K | Stacks 101 |
Followers 4.2K | Followers 290 |
Votes 656 | Votes 14 |
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Mandrill is a new way for apps to send transactional email. It runs on the delivery infrastructure that powers MailChimp.

Twilio SendGrid's cloud-based email infrastructure relieves businesses of the cost and complexity of maintaining custom email systems. Twilio SendGrid provides reliable delivery, scalability & real-time analytics along with flexible API's.

Twilio offers developers a powerful API for phone services to make and receive phone calls, and send and receive text messages. Their product allows programmers to more easily integrate various communication methods into their software and programs.

Amazon SES eliminates the complexity and expense of building an in-house email solution or licensing, installing, and operating a third-party email service. The service integrates with other AWS services, making it easy to send emails from applications being hosted on services such as Amazon EC2.

Chat API and SDK. With a beautiful UI Kit, easy to use React Components and powerful API. Add Chat to any application in a matter of hours. The tech uses Go, RocksDB and Raft. By the creators of Stream, the API that powers activity feeds for more than 300 million users.

SendBird is a Messaging SDK, Chat API, and fully managed chat infrastructure for your mobile apps and websites. Embeddable chat for iOS, Android, JavaScript, Unity, .NET.

Send email from your app with a simple API call, Sendwithus manages the rest. Templates, testing, data management, segments, and analytics are all accessible through a friendly dashboard.

Nexmo connects your apps directly to carriers around the world. Integrate SMS and Voice messages using one simple API. Use Nexmo Verity to register users, verify transactions, and implement two factor authentication.

Postmark removes the headaches of delivering and parsing email for webapps with minimal setup time and zero maintenance.

Sinch makes it easy for developers to add voice, messaging and SMS to their apps with just a few lines of code. Enrich your apps with communications that your users will love.