Best Email APIs with a Free Trial of 2025

Introducing Brevo, previously known as Sendinblue — your go-to platform for enhancing customer connections through various channels like Email, SMS, and Chat. This comprehensive toolkit is designed to transform casual visitors into loyal customers. Engage your audience by reaching them directly in their inboxes with visually appealing email campaigns, and send tailored messages that go right into your customers' hands. Brevo enables businesses to cultivate and strengthen relationships through tools such as marketing automation, email outreach, transactional messaging, and SMS services. What sets us apart? Our exceptional customer happiness team drives Brevo, and our flexible pricing plans are sure to bring a smile to your face. With a seamless integration of diverse services in a single, easy-to-use platform, we strive to make your sending experience enjoyable and effective!

SendX is an intuitive, affordable and feature-rich email marketing software for marketers and business owners. SendX prides its self on providing marketers with the most intuitive UIs in industry. SendX offers unlimited email sends with all plans, powerful automation capabilities and 24x7 live support. They also offer the best email delivery. SendX is trusted by more than 3000 companies around the world for their Email Marketing. Pricing: Start with a 14-day free trial (no need to have a credit card). Pricing starting at $9.99/month Key Features & Benefits: Send Unlimited Email Campaigns - Create Your Email List using forms and pop-ups - Powerful Automation Software - Drag and Drop Email Editor (no programming required) - Best of Breed Email Deliveryability (get your emails delivered to the primary inbox). - Free Migration Service: We will migrate your email marketing accounts from any ESP to you for no charge 14-day Free Trial (no credit card needed, instant setup).

Partner with the email service trusted by developers and marketers for time-savings, scalability, and delivery expertise. The Twilio SendGrid Email API and proprietary Mail Transfer Agent (MTA), intuitive console, powerful features, and email experts make it easy to ensure all your email gets delivered in seconds and without interruption. Whether you’re sending 100 emails or 100 billion, SendGrid is built to scale, while maximizing inbox placement and protecting your reputation as a trusted sender. Monitor engagement data and optimize deliverability with our Deliverability Insights dashboard. Integrate with our RESTful APIs and SMTP in minutes, with sample code libraries available in 7 languages, interactive docs, templates, and more.

TurboSMTP understands that email is not just a means of communication but the backbone of your customer engagement strategy. TurboSMTP Email API is trusted by developers and marketers alike for its time-saving features, scalability, and delivery expertise. Our service offers a flexible SMTP relay solution along with advanced features tailored to meet the needs of businesses of all sizes. With our intuitive dashboard, powerful features, and dedicated support, ensuring the delivery of your emails is seamless and uninterrupted. TurboSMTP's infrastructure is built to scale, whether you're sending a few hundred emails or millions. Integration with our service is effortless, with sample code libraries available in multiple languages, interactive documentation, and customizable templates. TurboSMTP offers webhook integrations and automates actions based on email events, streamlining your workflow. Plus, our email validation tools ensure list accuracy, reducing bounce rates and improving deliverability. TurboSMTP not only prioritizes the reliability and efficiency of email delivery but also understands the importance of providing exceptional support to our valued customers. That's why we offer multilingual 24/7 support.

Discover the email solution tailored for dynamic teams seeking efficiency. We understand the challenges of finding an affordable yet effective email service, and Mailjet emerges as the ideal choice for your requirements. Our cutting-edge features empower your business growth while remaining budget-friendly. With our user-friendly email editor, Passport, you can effortlessly design stunning, responsive emails in just a few clicks. Choose from our extensive collection of free email templates or unleash your creativity by designing from scratch. Enhance teamwork with Mailjet’s Collaboration Toolkit, allowing real-time collaboration on the same email template or campaign, thus boosting your team's productivity. Significantly reduce feedback loops with our commenting and approval workflow, enabling quicker turnaround times. Tailor each email using the customer data you gather and segment your contact list to ensure the right content reaches the appropriate audience. It’s simple to make every recipient feel valued and recognized. Furthermore, analyze the effectiveness of your campaigns with real-time statistics provided for each sending, helping you refine your strategies for even better results. With Mailjet, achieving email marketing success becomes not only possible but also straightforward.

Thousands of businesses are already utilizing Elastic Email for their email communications. This exceptional Email Marketing platform is designed on an extremely economical Email API. Factors such as deliverability, reliability, and scalability are crucial for success. You can effortlessly connect and dispatch your emails using our HTTP API or SMTP relay, accommodating growth to over 100 million emails each month on our high-speed global infrastructure. Each campaign allows you to foster stronger connections with your audience. Elastic Email equips you with all the necessary marketing tools to ensure your contacts feel engaged. Make the most of your email marketing efforts by crafting stunning emails, distributing newsletters, and automating your campaigns with remarkable speed, enhancing both efficiency and effectiveness. Furthermore, this platform prioritizes user experience, making it simple to implement and manage your email strategies.

Multi-channel marketing automation platform that allows marketers to create personalized promotional campaigns. You can choose from SMS, email, or web push notification. Or you can combine multiple channels into one campaign to create a complex message sequence. The platform offers all the tools necessary to automate email marketing. You can also create subscription forms and grow your mailing list. Drag and drop is intuitive and allows users to create mobile-friendly email templates. Or, they can choose from a large gallery of predesigned templates. The company also offers a transactional email service, which allows users to send up 12000 emails for free via SMTP and API. SendPulse offers its own chatbot creator. You can create a Telegram chatbot or a Facebook Messenger chatbot to send personalized messages or as an autoresponder.

Mailgun offers a robust email automation platform tailored for developers. By utilizing Mailgun, users can leverage a comprehensive cloud-based email service designed for sending, receiving, and monitoring emails generated through their applications and websites. The platform is compatible with a variety of programming languages such as Python, Ruby, PHP, Java, and C#. Additionally, Mailgun's tracking capability enables users to monitor all outgoing emails effectively, helping to minimize the likelihood of being classified as spam. This functionality not only enhances email deliverability but also provides valuable insights into user engagement.

We understand that time is your most valuable resource. It shouldn't be wasted on complicated email platforms. Benchmark Email makes it easy to access the tools you need so you can focus on building relationships, growing your business, and raising the bar. Your growing audience is your most valuable marketing asset. Use it more efficiently. Benchmark is free to try and discover how easy it can be to do effective email marketing. Benchmark offers a range of tools that will help you keep up with your drive, such as contact management. Benchmark Pro is the best upgrade to take full advantage of its capabilities. You'll be amazed at how much your company can benefit from the right tools.

Transactional emails are essential for conveying important information to your users. ZeptoMail stands out as a dependable and secure platform that ensures these vital emails are dispatched without delay. With its rapid delivery and exceptional inbox placement, ZeptoMail eliminates the frustration of customers having to wait for their messages. These emails, typically triggered by user actions, are anticipated by recipients and should ideally arrive in mere seconds. Choosing the right delivery service is key to maintaining customer satisfaction, ensuring that no one is left anxiously refreshing their inbox for verification codes or password resets. The effectiveness of email delivery is closely linked to the sender's IP address reputation, which makes ZeptoMail a robust solution designed specifically for the nuances of transactional email dispatch. Not only does it excel in speed, but it also ensures that emails land in the correct folders, enhancing user experience. Furthermore, ZeptoMail incorporates industry-standard authentication protocols like SPF and DKIM to bolster security and trustworthiness. By prioritizing these features, ZeptoMail empowers businesses to maintain effective communication with their customers.

Multi-channel marketing automation that is truly powerful. Advanced marketing automation, intuitive reporting, and powerful personalization via email and SMS can increase sales and revenue. More than email automation. Create entire customer journeys. Advanced marketing automation, intuitive reporting, and powerful personalization can help you increase sales and revenue. You can grow your audience by creating responsive landing pages and fully customizable forms. There are 100's of integrations available or by using webhooks to your custom web setup. Automated, dynamic content can turn prospects into repeat customers, keep subscribers engaged, and deliver personalized messages at scale to them. Optimize your conversions, track what's generating revenue, who are your top customers, and retain them better with data-driven automation.

Reply.io helps sales teams book more meetings and close deals faster with AI-powered, multichannel outreach. It is your all-in-one sales engagement platform that automates outreach, finds leads, and turns them into booked meetings. Reply’s built for sales teams, founders, and agencies who want to grow their pipeline without the manual grind. Just plug in your strategy → Reply handles the rest. Key features: - AI SDR that works for you → Learns your product, finds ideal customers, personalizes outreach, engages across channels, handles replies, and books meetings, even in multiple languages. - Built-in B2B database → Access 1 billion+ contacts with verified data, enrichment, and smart targeting. - Multichannel outreach → Automate email, LinkedIn, SMS, WhatsApp, calls, and more, all from one place. - Findy Chrome Extension → Find and reach out to leads directly from LinkedIn. Validate emails, make calls, sync with your CRM. - AI-powered personalization → Let AI write high-converting sequences and replies that sound human (and relevant). - Email Deliverability Suite → Keep emails out of spam with built-in warm-up, health checks, SPF/DKIM/DMARC monitoring, and more. What makes Reply different: Your own AI SDR that doesn’t just automate, it actually learns your product and adapts your outreach. Whitelabel available. Perfect for agencies that want to offer a branded solution. Agency Growth Hub. Purpose-built tools for lead gen agencies: dashboard, API, client management, bulk actions. Loved by 3,000+ teams worldwide & G2 Top 50 Sales Product of 2024.

EmailLabs is a cloud-based email API and SMTP service designed to send transactional and marketing emails. The unique know-how and partnership between well-know Inbox Service Providers ensure all emails sent from our servers being tailored to the requirements of foreign providers like: Gmail, Yahoo or Hotmail as well as local ISPs such as WP.pl, Onet.pl, Seznam.cz, Web.de, Seznam.cz or Libero.it. We take care of overall deliverability to make sure your messages land in customers’ inboxes, promotions or Offers tab. EmailLabs platform can be easily integrated with any email system or application that allows you to add a third party SMTP server. The whole setup process takes only 5 minutes.

Cloud-based platform offering SMS marketing software. It enables businesses to connect, engage and grow customers using a cloud-based portfolio of services including SMS, RCS, Voice, Email, WhatsApp, and Google Verified SMS. It provides solutions to over 400+ enterprises and expands its portfolio to simplify engagement and increase conversions. We enable businesses to connect, engage and grow customers using cloud-based portfolio of services with agile marketing automation solutions. It also provides a marketing automation tool that automates data ingestion, content creation, customer journeys, campaign triggering, and real-time reports.

Authkey.io stands as an exceptional Enterprise Omni Channel API platform, offering an extensive suite of communication tools and APIs meticulously designed to empower businesses in their quest for efficient and secure customer engagement. SMS API:A seamless communication symphony with its event-based messaging prowess. This facet encompasses the seamless orchestration of Bulk SMS delivery, transactional messages, one-time passwords (OTP), and the authentication process through call-based interfaces. Voice API: This dynamic capability ensures the delivery of OTPs through vocal messages, providing an alternative avenue that ensures the recipient's prompt access. Email API: Reliable and rapid delivery of emails, serving critical functions such as password verification, account creation, OTP distribution, and email validation. WhatsApp Business API: The contemporary business landscape requires a direct conduit to reach the massive audience on the WhatsApp API facilitate this engagement, enabling businesses to establish a direct line of communication with their audience. Two-Factor Authentication (2FA) API: Seamlessly dispatching OTPs, verifying logins, and bolstering the security architecture of business software, CRM systems.

Reliable delivery of your application emails. ActiveCampaign Postmark delivers your email on time and every time to customers. Customers expect transactional emails to arrive promptly, not later. We monitor our delivery times and share the data with the public. Our knowledgeable support team is always available to assist you, via 1-on-1 calls, webinars or email. Postmark integrates seamlessly into any stack thanks to its API libraries that support almost every programming language.

-- The email engine you can build on -- We're everything that happens under the hood of your email communications. Reliable Email API with endless capabilities & features ready for integration. Flowmailer's Email Engine provides all the tools you need to build a professional email strategy. From marketing to customer support, from account management to warehousing, every email sent is valuable. Flowmailer is built for continuous high-performance, no matter the emails you're sending. Take away the difficulties of email delivery and focus on creating meaningful email communications with your customers. Email Delivery | SMTP & API | Infrastructure | Transactional Email

YCloud provides a comprehensive solution that features top-tier capabilities while maintaining flexible and competitive pricing. It supplies essential communications infrastructure that empowers businesses to grow and evolve effectively. The web-based platform enables users to schedule messages with ease and flexibility. Capture attention and engage customers through tailored marketing campaigns across all channels, with no coding skills necessary. Seamlessly integrate with numerous applications to streamline your tasks, allowing you to focus on what truly matters, all without the need for coding. It also supports two-way messaging, ensuring a consistent connection with SMSC while delivering enhanced session connectivity and increased throughput. Additionally, it incorporates multi-factor authentication through SMS, voice, WhatsApp, and email, ensuring robust security measures to prevent fraud, data breaches, or revenue loss. YCloud's services not only enhance communication but also improve overall operational efficiency, making it an invaluable asset for modern businesses.

Track delivery, clicks and bounce rates in real-time. Welcome to the lightning-fast delivery of transactional emails. Create beautiful, responsive emails with our drag-and drop email template builder in minutes. Supercharge your emailing abilities with our fully-warm-up dedicated IP address. Receive real-time notifications regarding email events. Use our webhooks for tracking email delivery, bounces and more. Get detailed, real-time reports on emails sent and opened. Using valuable insights, you can enhance your user's experience. Manage bounced emails with ease while ensuring that recipients who received the emails are not contacted again. Use our email API or the traditional SMTP to send emails via HTTP requests. Our email API integrates seamlessly with your website or app to ensure that your emails are delivered directly to your inbox.

Tarvent is an all-in-one email marketing solution designed to streamline campaign management and improve customer engagement through powerful automation. The platform provides intuitive tools for setting up automated email sequences, segmentation, and real-time performance tracking. Tarvent’s dynamic content and A/B testing capabilities help businesses optimize campaigns and drive higher open rates and conversions. With seamless integrations with over 1200 CRM, marketing, and eCommerce platforms, businesses can easily manage their email marketing efforts across different tools. The platform also ensures data privacy and provides features such as automatic list cleaning and suppression rules to maintain email hygiene. Whether for transactional emails or marketing automation, Tarvent offers an accessible and effective solution for businesses of all sizes to improve their email marketing strategy.

Choose the best email SMTP or API for the most robust delivery experience. Netcore Email API, formerly known as Pepipost, provides a powerful transactional inboxing and AI-powered email delivery infrastructure that is reliable, scalable and secure, and at the most affordable price plans. We help brands engage with their customers with the right content at the right time via emails.

MailThis.to offers an intuitive API that is easy to remember and requires minimal documentation, allowing users to recall its functionality when needed and search for specifics online. You can quickly set up your first form in mere seconds, creating a lasting memory of the process. The platform supports features like spam filtering, form customization, and file uploads. Users can send their first 250 emails free of charge, after which the cost is just $5 for every additional thousand emails. To maintain privacy, you can create an alias, ensuring your email address remains undisclosed. Forms can be created using HTML, a form builder, or via JavaScript to generate POST requests directed to your inbox. With every form submission, you will receive an email notification; the initial email requires verification, and each visitor must complete a reCAPTCHA to fend off spam attempts. MailThis.to allows you to send up to 250 emails without the need for an account, completely free of charge. Since its inception in 2014, MailThis.to has served thousands of users with a straightforward form-to-email API, facilitating the delivery of millions of emails. We are eager to assist you in managing your email needs efficiently!

With over 700 direct carrier connections and 60+ offices on 6 continents, Infobip is a global leader in omnichannel communication. We make it our business to simplify how brands connect with, engage and delight their customers at global scale. Our programmable communications platform delivers a suite of tools for advanced customer engagement and support, plus security and authentication. We make this available to you across the widest range of communication channels possible. THE INFOBIP ADVANTAGE (1) Personalized omnichannel customer connections Achieve deeper customer engagement across the widest selection of local and global channels, including: SMS, RCS, WhatsApp, voice, video, email and the most popular chat apps. (2) Global reach, local presence Our 60+ offices around the world allow us to react faster. We provide 24/7 customer support, technical solutions in-line with needs and local requirements — based on proven best practices. (3) Full stack customer engagement Deliver better outcomes for your business by enhancing your communications with fully integrated contact center, marketing automation, and chatbot building solutions informed by our customer data platform.

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.