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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. | 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. |
Open Tracking;Click Tracking;Unsubscribe Tracking;SMTP Relay;SMTP API;Web API;DKIM;SPF;Reputation Monitoring;ISP Monitoring;Domain Level Load Balancing;ISP Deliverability Outreach;Return Path Certified Partner;Support via Phone, Chat, Email, Online Support Portal | Reactions;Threads & Replies; Presence/who is online;Fulltext search on chat messages;Messages states; Typing Indicators;Message history;Powerful query support for channels and users;AI based moderation for spam and profanity;User Roles;@mentions;User invites;Mute users;Ban users;Flag Messages;Custom Messages;React Components;Push notifications;Webhooks;Unread message counts;Multi Region support;GDPR compliancy tools;HIPAA ready;Custom Slack Style Slash commands;Highly available infrastructure with Raft replication;Giphy integration;Url enrichment;Video Playback; CDN integrated;Fast response time; On premise;Fully customizable;Powerful CLI;Unlimited message retention;99.999% uptime SLA; 24/7 phone support; SAML login; 2FA for developer accounts;Emoticons;File uploads via select, drag and drop and clipboard; React Native Components; |
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Stacks 11.1K | Stacks 18 |
Followers 5.7K | Followers 54 |
Votes 720 | Votes 95 |
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Mandrill is a new way for apps to send transactional email. It runs on the delivery infrastructure that powers MailChimp.
Mailgun is a set of powerful APIs that allow you to send, receive, track and store email effortlessly.

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.

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.

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.

Mailjet is a real-time Cloud Emailing platform: scalable, agile and flexible. Our unique algorithm boosts your deliverability and our platform provides in-depth insight so you can optimize more than ever.

Add In-App User-to-User Communication into Mobile Apps & Websites, with rich & engaging Text Chat, Video, and Audio Calling experiences, to Increase User Engagement and Enable new Revenue Streams.

SparkPost is the world’s #1 email delivery provider. We empower companies with actionable, real-time data to send relevant email to their customers which increases engagement and both top and bottom line revenue.