Best Free Transactional Email Services of 2026

GetResponse offers an all-in-one marketing platform designed to equip marketers, solopreneurs, creators, coaches, and small business owners with powerful, user-friendly tools for email marketing, automation, and content monetization. With more than 25 years of experience, GetResponse supports audience growth and engagement through email campaigns, enables seamless course creation and sales, and helps turn passion into profit. It’s the ideal choice for building personal brands, selling products and services, and creating loyal customer communities.

Selzy is a simple email marketing tool for startups. Lightning-fast 24/7 expert support, even on the Free plan. From list growth to segmentation, automation, A/B testing, and analytics, Selzy covers it all. - Launch email campaigns in less than 15 minutes with Selzy’s intuitive drag-and-drop editor. - Grow your audience with ease with embedded sign-up forms or pop-ups. - Automate your campaigns in a few clicks. - Make use of direct integrations with WooCommerce, Shopify, Salesforce, Hubspot, Wordpress, Facebook Lead Ads, and so much more. - Get access to the knowledge base 150+ tutorials.

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!

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.

Consolidate all your email communications on a single platform, delivering outstanding returns on investment. Manage every email marketing initiative in ONE centralized location, eliminating the need for multiple service providers. Control various brands and assets effortlessly, with customizable access for your team or clients. Every paid plan includes unlimited brands and user accounts, making it an ideal choice for agencies. It supports both drip and transactional emails, which can be triggered by user-defined actions or API requests. You can customize an Unsubscribe page on your own domain, complete with your brand’s logo and specific preferences. The free Startup plan allows you to store up to 1,000 contacts and send 2,000 emails per month. Enjoy UNLIMITED custom sending addresses, with the option for DKIM and SPF configuration. Additionally, contacts can be organized into multiple lists at no extra cost, and you pay only for the number of unique subscribers. You can seamlessly add an unlimited number of brands—whether they are clients, products, or websites—managing everything from the main dashboard. All your information is neatly organized by brands, including lists, campaigns, templates, and forms, ensuring streamlined operations and efficiency. This comprehensive setup allows you to focus on growth while maintaining control over your email marketing strategies.

Mailofly serves as a comprehensive email infrastructure solution designed specifically for developers, SaaS providers, startups, and contemporary applications. It enables users to send and manage emails seamlessly via a robust REST API or SMTP, eliminating the intricacies associated with creating and upkeeping personal email systems. The platform accommodates transactional emails, marketing campaigns, customizable email templates, delivery monitoring, detailed logging, webhooks, inbound email routing, domain management, and audience oversight. Developers can effortlessly integrate Mailofly into their projects and access real-time delivery updates through webhooks. With its compatibility with various development environments and a workflow tailored for developers, Mailofly streamlines the processes of sending, receiving, tracking, and scaling email communications from a unified platform. This makes it a desirable choice for businesses looking to enhance their email capabilities efficiently.

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.

Bird, previously known as MessageBird, represents the future of CRM tailored for Marketing, Sales, and Payments, facilitating more than 5 trillion messages each year across platforms like Email, SMS, and WhatsApp. Top brands efficiently enhance their growth through Bird by engaging in tailored interactions across these channels. Innovative organizations around the globe utilize Bird's robust applications and APIs to create effective communication solutions. Start your journey today and connect with your customers seamlessly across various channels, catering to diverse use cases regardless of location. You can send marketing messages, push notifications, order confirmations, delivery updates, and much more. If operational challenges are hindering your growth, leverage automated conversations and workflows to gather essential information upfront, minimize manual tasks, establish self-service options, and direct chats to the appropriate agents. With our dependable, auto-scaling APIs, you can quickly get started with extensive documentation, comprehensive API references, and user-friendly SDKs at your disposal. Experience the power of streamlined communication and watch your business thrive.

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.

Our Email Marketing platform provides all the tools you need in order to be a successful email marketer. Take a look at our many features, including workflows, transactional emails, automations, and campaign types, to see what we mean. You can create stunning emails with our campaign builder. You need the right tools to create an effective campaign. An expert in email marketing and digital strategies will help you understand your business and your existing email program, and determine your campaign goals. Then, we will analyze and perform a audit of your current marketing strategy and database growth strategy. We will also review your current email program in order to identify areas for improvement. We will schedule a consultation to discuss the areas that need improvement, best practices, examples, and how we can help your business win. Get a detailed guide that will show you the best way forward and how to create low-cost, high-value ways to reach your goals.

Resend is an email API and marketing email platform designed to help developers integrate reliable email delivery into websites, applications, and business workflows. The software provides REST APIs, SMTP support, and SDKs for programming languages such as JavaScript, Python, Ruby, PHP, Go, Java, and .NET. Developers can send transactional emails for user authentication, account notifications, purchase confirmations, password resets, and other application-generated events. Its email sending capabilities include batch delivery, scheduled messages, file attachments, and configurable sending domains. React Email integration allows developers to create reusable email templates using React components rather than manually building complex HTML layouts. Resend also includes a visual email editor for creating marketing campaigns, newsletters, and promotional messages without writing code. Audience management tools support contact imports, contact attributes, segmentation, and broadcast email distribution. The platform provides delivery analytics, open and click tracking, bounce notifications, webhook events, and detailed API logs for monitoring email performance. Additional capabilities include domain verification, deliverability insights, dedicated IP addresses, inbound email processing, and automated email workflows.

SMTP2GO is a reliable outgoing email service that allows you to track and send all emails securely and easily. SMTP2GO has a redundant, multi-data center infrastructure that allows users send emails even during an internet outage. SMTP2GO features include real-time analytics and bounce/spam tracking, weekly summaries spamtrap detection, blacklist monitor, DKIM/SPF and many other features.

Launch and assess your email marketing initiatives with our platform. Begin your complimentary plan, which allows for unlimited sending and remains free indefinitely! Create tailored, engaging, and impactful email marketing campaigns effortlessly! Leverage our advanced infrastructure to achieve impressive inbox delivery rates. Whether it's a straightforward welcome email or a multifaceted strategy designed to boost customer loyalty, you can streamline various processes through automation. With the newfound simplicity in crafting, implementing, and monitoring campaigns, you can dedicate more time to analyzing outcomes to enhance future efforts. Discover valuable insights from each campaign with our interactive reporting tools. Enjoy comprehensive oversight of your campaigns with a quick and detailed snapshot of their progress. Monitor unique and overall open rates, click-through rates, bounce statistics, forwards, and unsubscribes, giving you a competitive edge in the email marketing arena while ensuring your strategies are always improving. Stay ahead in your marketing game by continuously refining your approach based on the data you gather.

KingSMTP (formerly known as Kingmailer, founded in 2017) is a simple and fully featured mail server / SMTP service for use by anyone, not just developers. Start sending, receiving or routing your emails with a few clicks.

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.

Amazon Simple Email Service (SES) offers an economical, adaptable, and scalable solution for sending emails from various applications. It allows quick configuration to cater to multiple email scenarios, such as transactional messages, marketing campaigns, or large-scale communications. The service enhances deliverability and safeguards sender reputation through its flexible IP deployment and email authentication features, while sending analytics provide insight into email performance. With Amazon SES, users can securely send emails on a global scale and handle large volumes effortlessly. Whether utilizing the Amazon SES console, APIs, or SMTP, you can set up email dispatch in just a matter of minutes. Additionally, Amazon SES enables email reception, facilitating effective customer engagement on a large scale. Importantly, you only incur costs based on your actual usage of the service, making it a budget-friendly option for businesses of any size. Furthermore, this service is designed to meet the evolving needs of developers and marketers alike, ensuring they can communicate effectively with their audiences.

Send up to 5 million emails each hour, with an impressive 99.8% delivery rate to ensure your messages reach their intended recipients. If you believe a dedicated IP is necessary, simply reach out and we will arrange one for you while monitoring the performance and stability of our IP pools. You can begin utilizing our API in just a few minutes, all while remaining GDPR compliant, as there’s no need to upload sensitive data; just send an email request and receive statistical feedback. UniOne ensures that no personal data is retained on our servers, allowing you to track your email statistics effectively, including delivery rates, opens, clicks, and unsubscriptions, for better contact management. Should you experience lower than expected results, UniOne is ready to offer suggestions for improvement. Additionally, if you are nearing the limit of your plan, our system will notify you before it expires, and you can easily add multiple email addresses to keep your IT team informed with the latest reports. With these features, you can enhance your email marketing strategy and ensure that your communications remain effective and compliant.

MailerSend is a hassle-free transactional messaging service designed so that developers can integrate transactional email and SMS quickly and effortlessly into their stack. Intuitively designed so anyone can contribute, with a powerful sending infrastructure and flexible payment plans that empower you to scale your sendings quickly. With over a decade of deliverability expertise, and inbuilt email verification, you can rest easy knowing your sender reputation will remain intact. Plus, premium features including sender identities, dedicated IPs and priority support make for an advanced, comprehensive solution. Get started for FREE with 500 emails per month, then upgrade for as little as $7/month for up to 5,000 emails! Want to try more? Get a 14-day free trial of our Professional plan and test-drive every feature it has to offer.

Sweego is a multichannel notifications SAAS platform. Developers can send transactional, engagement, and CRM messages via various channels, including email, SMS, push notifications, and more. The platform offers APIs, webhook and web interface for building template, follow statistics. With Sweego'API, Developers can integrate notifications and messaging capabilities into their applications. Key features include message templates, email authentication, webhooks, sandbox testing, delivrability expertise for emails, scalability, detailed logs, comprehensive statistics...

BlueFox Email, send beautiful emails and only pay for what you send, not for contacts.

SMTP Senpai, offered by MailSenpai, serves as the SMTP relay for emails generated by your applications, websites, and tools, handling everything from sign-ups and password resets to order confirmations, notifications, and contact forms. You can connect using standard SMTP (port 2525 or 587 with STARTTLS), a REST API that provides JSON responses, or a dedicated form endpoint suitable for web forms, even on static sites. All outgoing emails are DKIM-signed using your own domain, for which we supply the necessary DNS records and verify them on your behalf. Automatically, we suppress bounced addresses, maintain a 90-day log of all sent emails, and provide you with a comprehensive weekly report. Rather than suspending your account upon exceeding a certain threshold, we issue a warning and guide you on what needs to be addressed. Our servers and data operations are based in the EU, and we offer support in both Italian and English through tickets and email. Try us out with a 14-day free trial that requires a card for registration (you can cancel anytime), and then continue with plans starting at €12.90 per month for up to 10,000 emails on an annual subscription. This service ensures reliable email delivery while offering flexibility and support for your communication needs.

Email Deliverability Tool by SMTPCart provides an immediate, end-to-end diagnostic assessment of your domain health, authentication setup, and message content. Built to streamline email optimization, this friction-free utility requires no account creation or sign-up. Senders simply dispatch a single test email to a uniquely generated address to receive an instant performance score out of 100%, accompanied by an audit-ready downloadable PDF report detailing critical setup metrics. The tool performs an exhaustive technical evaluation to ensure your messages consistently reach the inbox rather than the spam folder. It verifies strict protocol alignment across SPF, DKIM, and DMARC parameters while validating essential server-level security requirements, including reverse DNS, TLS encryption, and RFC-compliant one-click unsubscribe headers. Additionally, it cross-references your sending infrastructure against SpamAssassin content rules, 20 active IP blocklists, and the Spamhaus domain blocklist, giving technical teams and marketers the actionable intelligence needed to safeguard sender reputation.

Nitrosend consolidates branded email campaigns, automated workflows, and transactional communications within a single platform. Teams have the flexibility to draft and review their content directly in the dashboard, utilize the CLI and REST API from their own applications, or collaborate through various AI agents such as Claude, ChatGPT, and Cursor via MCP. Agencies benefit from the ability to oversee multiple client brands, transfer account ownership seamlessly, and maintain team collaboration. Users can create signup journeys based on product events, dispatch order confirmations, conduct message tests, and thoroughly review materials prior to launching campaigns. The free tier offers access to campaigns, workflows, transactional emails, and MCP/API/CLI functionalities with no limits on contacts, while the premium plans enhance sending capabilities and expand team sizes. Furthermore, with its user-friendly interface, teams can efficiently streamline their email marketing efforts and improve communication strategies.

CXONCLOUD, a B2B SaaS, is designed to manage and measure customer satisfaction in just a few clicks. One solution that provides unlimited customer feedback, loyalty, awards and rewards, as well as referral marketing and email automation. It helps businesses deliver a seamless customer experience across all touchpoints. CXONCLOUD improves search and simplifies customer engagement, whether it's feedback or booking. It can automatically recognize customer sentiments and alert any impending negative word of mouth. This all-in-one app automatically measures customers' loyalty and has readymade loyalty campaigns that can be used to engage customers via email and social media. Small businesses can easily get referrals from loyal customers with just a few clicks using the built-in referral marketing campaigns. Loyal customers can be rewarded by QR codes and promo codes, as well as automatic list generation and rewards management modules.

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.