9 Open API and Open-Source Marketing Automation Tools

9 Open API and Open Source Marketing Automation Tools

The editors at Solutions Review have compiled a list of the best open-source marketing automation tools and solutions for companies of various sizes.

Searching for high-quality marketing automation software can be a daunting process, one that requires long hours of research and deep pockets. The most popular marketing automation tools often provide more than what’s necessary for non-enterprise organizations, with advanced functionality relevant to only the most technically savvy users. Thankfully, there are several open-source marketing automation tools out there. Some of these solutions are offered by vendors looking to eventually sell you on their enterprise product. In contrast, others are maintained and operated by a community of developers looking to democratize marketing tools and technology.

Yet other companies offer open APIs for their software. This doesn’t grant users complete access to source code, but it gives them the ability to utilize or connect with various aspects of a marketing tool. This is a great advantage for companies looking to experiment with certain tools or don’t want to spend the money on a complete product. Open APIs are not the same as open-source tools, but each category has its advantages. In this article, we will examine nine different open-source and open API marketing tools.

Open-Source Marketing Automation Tools


Agnitas, a German company formerly known as OpenEMM, is the open-source version of the AGNITAS E-Marketing Manager. This solution is a good choice for businesses looking to address email marketing and automation needs, but for whom a reduced range of functions is sufficient. OpenEMM is GDPR compliant and is available for free. The newest version offers template-based email creation, automatic bounce management, graphical real-time statistics, self-defined and behavior-based target groups, web forms for user self-service, and much more. Users can experiment with a demo account to fully explore the available features before installing.


HubSpot is a budget-friendly solution best suited for small and medium-sized organizations. Although HubSpot’s main offerings aren’t open-source, the vendor is actively developing other open-source applications and tools. This includes Tether, a positioning engine for creating overlays, and Vex, a highly configurable and easy-to-style dialog library. Other projects include tooltips, dropdowns, and Messenger, which help customers create alerts and messages for their app. If your organization is looking to experiment with various open-source marketing automation tools, HubSpot is a unique solution.


Mailtrain is a self-hosted newsletter app built on top of Nodemailer, a module for Node.js applications that facilitates email sending. This is a great tool for businesses looking for open-source email management solutions. Features include list management, custom fields, list segmentation, RSS campaigns, GPG encryption, click stats, template editors, and more. Mailtrain also lets users definite automation triggers to send specific messages. Interested parties have access to the Mailtrain Wiki and Blog, and the source code is accessible via GitHub.


Mautic is one of the largest open-source marketing automation communities out there. Over 200,000 organizations use this tool, and it’s available in over 35 languages. Users can download the platform, contribute code, or discuss it with other users. With Mautic, users can build email nurture campaigns, personalize messages, execute A/B tests, and measure results. This solution is available for free, and interested parties have total access to the source code and all of its documentation.


phpList is an open-source newsletter and email marketing tool. Designed to help you grow lists of engaged subscribers, this solution lets users easily import and export subscriber data from any source. phpList’s message queue ensures no subscribers receive the same campaign twice, and features like the do-not-send list make sure you can’t accidentally send to them again if they unsubscribe. phpList offers other features such as campaign and newsletter management, list segmentation and target selection, traceable statistics, and much more. If you’re looking for an in-depth, open-source email and marketing tool, phpList is a great choice.

Open API Tools


Gist is an all-in-one solution for live chat, email marketing automation, forms, knowledge base, and more. Filter your contacts based on their behavior to create targeted segments, and send relevant emails tailored to their individual interests. Visualize every interaction you have with a customer and create different automation triggers depending on their actions. Features like Create Actions and Tags allow users to understand their audience, while Reporting Data reveals trends in buying behavior. Gist also offers several customer support features.


MailChimp is a comprehensive marketing platform with a deep set of features. Users have access to email campaign functionality, shopping cart notifications, reports, A/B testing, and more. It integrates with many other technologies and solutions, making it worthwhile for any business, regardless of budget or tools that are already being used. If you’re looking for a solution with strong email functionality, MailChimp is a great choice.


SendinBlue is a powerful marketing tool designed for universal use. Users can create clean and professional newsletters, custom forms and contact fields, and more. Schedule email campaigns at the perfect time and monitor open rates, click-through rates, and deliverability. SendinBlue offers four different paid options in addition to its free version. In addition to those plans, SendinBlue also offers packages for mobile messages and individual IPs.


Sendpulse is a versatile marketing platform that is easily customizable. Sendpulse features a visually intuitive drag-and-drop email editor that doesn’t require technical or HTML knowledge. Users also have access to automation workflows, subscriber rating, email personalization, subscription forms, and more. This vendor features a sliding price scale based on the number of subscribers that your organization wants.

Anna Birna Turner

Content Editor & Writer at Solutions Review
Anna is an enterprise technology writer covering Marketing Automation, Customer Relationship Management (CRM), and Enterprise Resource Planning (ERP). Feel free to reach out to her at any time at abturner@solutionsreview.com
Anna Birna Turner