Best Email APIs of 2024

Capture SMTP traffic in staging and dev environments. Flexible API allows you to automate test scenarios and flow. Validate HTML/CSS and analyze email content for spam scores. Each Mailtrap account comes equipped with a unique testing environment. It takes just a few steps to integrate it with your app. You can create individual inboxes to support different environments, review servers, and then group them into the appropriate projects. Our API is easy to use and allows you to quickly set up automated testing using unlimited API calls. View messages, check spam scores and validate headers. You can also analyze the HTML support across all email clients. Access your inboxes to clients or colleagues. Send selected test email to whitelisted recipients. Mailtrap can be sent directly from your CRM or email send service. Simulate sending emails to multiple recipients.

Important information is contained in transactional emails. ZeptoMail is a reliable, secure service that delivers all of these important emails immediately. ZeptoMail makes it easy to keep your customers happy with its fast delivery and excellent inbox placement. Transactional emails are unique emails that can be triggered by a user action. Your customers expect these emails to arrive in their inbox within seconds of the trigger event. Choose the right delivery service to keep your customers satisfied. Your customers will no longer need to refresh their inbox for password reset emails or email verification codes. Email delivery is dependent on the reputation of the sender IP. ZeptoMail was created to address the challenges of sending transactional email. Delivery is excellent. It is important to deliver the correct folder. ZeptoMail supports industry standard authentication mechanisms like DKIM and SPF.

YCloud is an all-in one solution that offers best-in class features at highly competitive pricing. Provide critical communications infrastructure to support businesses' growth and expansion. Web-based solution for scheduling messages with ease and freedom. No code required to create personalized marketing campaigns that grab attention and delight customers. No code required. Connect with thousands of apps to automate and save time. Two-way messaging is supported. A continuous connection with SMSC is maintained. Multiple session connectivity and greater throughput are guaranteed. Multi-factor authentication via SMS voice, WhatsApp, email, and WhatsApp. Keep your data safe and prevent revenue leakage, data breaches, fraud and other threats. Two-way messaging is supported. SMSC can maintain a continuous connection. This will guarantee multiple session connectivity and greater throughput. To automate your work, connect with thousands of apps and have more time to do what is most important.

We are a group of engineers who enjoy building tools for other developers. Our goal is to build the email platform that we've always wanted -- one that works. Receive real-time notifications straight to your server. Each time an email is opened, delivered, bounced or a link clicked. Our API allows you to experiment and simulate events without the risk of accidentally sending emails to real people. Simulate events and test our API without risking accidentally sending real emails. Rely on a platform with reputable IPs that are used by trusted senders who have distributed workloads over different IP pools. Get a fully-managed dedicated IP that autoscales and warms up based on the volume of your sending, without any waiting period. Get a fully-managed dedicated IP that warms up and autoscales according to your sending volume.

Transactional emails: Reach your inbox when it matters most Send personalized, fast transactional emails via API or SMTP. Enjoy the benefits of our global experience sending billions upon billions of emails. Personalized transactional emails are sent to inboxes and not to spam folders. You can customize your analytics with pre-built dashboards and an export API. For assistance, consult our award-winning Support team or read the documentation guides. Use custom tagging and whitelabeling to create conditional content. Globally distributed infrastructure: Automatic SPAM loop registration and prewarmed dedicated IPs. Analytics can be accessed in many ways, including custom tags, A/B testing capabilities and comparative reports. White-labeled click tracking, custom reverse DNS and rules engine are available. Custom return path is also available. This is the average delivery time for top 3 ISPs. It was sent from our MTAs and to the recipient's mail server.

Billions of people. Trillions of connections. One API. The Nylas APIs are powering applications with email, calendar and contacts that sync from any inbox around the globe. Nylas is the only company that provides an API for all email, calendar and contacts integrations. Contact records can be updated with missing information. A connection graph can make intros more warm. To create a single data source, combine data from each address book.

SendPost replaces manual hacks, messy workarounds and daily frustrations associated with your email API/SMTP provider. If you send a few thousand emails, most email API solutions will work well. You will choose one based on its price, features, or support. If you are a big sender, sending millions of emails each month, the real problem is here. This is when managing multiple domains, IP-Pols, and IP/Domain reputation becomes a major headache. Even a small drop in your email open rate, or delivery, can have a significant impact on your revenue. You need a solution that helps you identify the problem and provides quick solutions. You don't want spend hours looking through logs to determine if your domain, IP or sending reputation are low.

Our mission is to empower customers by providing an easy email communication platform that delivers cost-effectively and without any barriers. Mailazy offers fast email delivery, high deliverability and customer support at affordable prices. Our global cloud infrastructures eliminate the email delivery problems that can arise from large-scale email sending. Access a wide range key metrics to improve your email performance. Receive real-time notifications about events. Simply set up your endpoints and select the events that you want to track. Then, receive an automated response. Mailazy's email API was specifically designed for developers. It allows you to integrate and send emails quickly.

Mail360 is a platform for email APIs that allows you to create your application without having to build the email functionality yourself. A single email API can power the email workflow of your application, whether you connect to an inbox hosted by another email provider or your user's mailbox. Real-time, secure and reliable email sync between multiple email providers. With a single set of email APIs, you can send and receive emails anywhere. Universal email API allows you to build email workflows in your application however you like. Connect your application to more than just other email providers. Integrate your application's mailbox with your workflow and host it on your own server.

AWS Communication Developer Services are cloud-based SDKs and APIs that allow developers to add communication capabilities to apps or websites using minimal coding. Send marketing and promotional messages with segmented messaging and top email deliverability. Scalable video technology can be used to build your website or application. This technology is useful for telehealth, education, field support and more. Build an IVR that supports touch-tone, conversational voice bots, text-to-speech, and more. Automated workflows and event-triggered messaging across channels allow you to send messages at the perfect time. Segmented lists can be used to determine who received messages.