Marketing automation platforms in 2026

Narrower

• Email marketing and newsletter software 42 Substack, Mailchimp and Klaviyo
• Email sending platforms and email templating tools 33 SendGrid, Amazon SES and Mailgun
• Social media scheduling and management tools 14 Sprinklr, Hootsuite and Sprout Social

Commercial marketing automation platforms

1. 1
   Substack Substack Inc.

   American online newsletter platform

   Complete system Production-ready A writer wants to start a free or paid newsletter at no upfront cost and benefit from Substack's discovery network.

   25k readers a month Since 2017 Commercial
2. 2
   Braze Braze, Inc.

   Power customer-centric interactions between consumers and brands in real-time.

   Complete system Production-ready A large consumer app or brand needs real-time lifecycle messaging driven by app behaviour.

   1.1k readers a month Since 2011 Commercial
3. 3
   Mailchimp Intuit

   Utilize real-time user behavior data and artificial intelligence to convert more customers. Easy to use, get started for free!

   Complete system Production-ready A small business or nonprofit wants a familiar email newsletter tool with lots of templates.

   1k readers a month Since 2001 Commercial
4. 4
   Klaviyo Klaviyo

   Klaviyo unifies marketing and service with its AI-first B2C CRM. Try our omnichannel marketing software, powered by K:AI agents to deliver personalised experiences across email marketing, WhatsApp and more.

   Complete system Production-ready A Shopify or other online store wants purchase-driven email and SMS marketing.

   839 readers a month Since 2012 Commercial
5. 5
   Sprinklr Sprinklr

   Unify customer journeys with Sprinklr’s AI-native platform. Connect every touchpoint, empower teams, and elevate conversations to earn lasting loyalty.

   Complete system Production-ready A global brand needs social, care and listening across many regions and teams in one platform.

   581 readers a month Since 2009 Commercial
6. 6
   Hootsuite Hootsuite

   Hootsuite is a social media management tool that brings scheduling, content creation, analytics, and social listening to one place.

   Complete system Production-ready A marketing team manages many brand accounts across networks and needs approvals and reporting.

   360 readers a month Since 2008 Commercial
7. 7
   Constant Contact Constant Contact

   With Constant Contact, you can create effective email marketing and online marketing campaigns to meet your business goals. Start your FREE trial today!

   Complete system Production-ready A local small business or nonprofit wants simple email newsletters and values phone support.

   286 readers a month Since 1995 Commercial
8. 8
   SendGrid Twilio

   SendGrid's trusted email API and marketing campaigns platform is now available through Twilio.com.

   Building block Production-ready An application needs to send high volumes of email through a well-known API.

   283 readers a month Since 2009 Commercial
9. 9
   Sprout Social Sprout Social

   Maximize your social ROI with Sprout Social, trusted by 30k+ brands. Power everything from publishing and engagement to analytics and influencer marketing. Try 30 days free.

   Complete system Production-ready A midsize marketing or customer care team needs strong social reporting and engagement workflows.

   221 readers a month Since 2010 Commercial
10. 10
    Brevo Brevo

    Brevo is the most intuitive all-in-one customer engagement platform: email and SMS marketing, automation, CRM, live chat, and transactional email. Try it free.

    Complete system Production-ready A small business, especially in Europe, has a large contact list but sends infrequently.

    208 readers a month Since 2012 Commercial
11. 11
    Salesforce Marketing Cloud Salesforce, Inc.

    Our marketing platform helps you win customers, improve engagement, and grow revenue. Explore marketing software solutions from Salesforce Marketing Cloud.

    Complete system Production-ready A large consumer brand sends at high volume across channels and has a marketing operations team with Salesforce skills.

    155 readers a month Since 2000 Commercial
12. 12
    Amazon SES Amazon Web Services

    Amazon Simple Email Service (SES) is a cost-effective, flexible, and scalable email service provider that allows developers to send email from within any application.

    Building block Production-ready You send large volumes of email, run on AWS and can manage deliverability yourself.

    Commercial
13. 13
    Buffer Buffer

    Use Buffer to manage your social media so that you can create and share your content everywhere, consistently. Try our forever free plan or upgrade for more.

    Complete system Production-ready A small business or creator wants to queue posts across a handful of channels without paying much.

    135 readers a month Since 2010 Commercial
14. 14
    HubSpot Marketing Hub HubSpot, Inc.

    Complete system Production-ready A small or midsize B2B company wants inbound marketing and lead nurturing in the same system as sales.

    Commercial
15. 15
    ActiveCampaign ActiveCampaign

    Go beyond marketing automation with ActiveCampaign's autonomous marketing platform. Your team of AI agents handles email, SMS, WhatsApp and more for you, backed by billions of data points.

    Complete system Production-ready A small or midsize business wants sophisticated email automation at a price below HubSpot.

    68 readers a month Since 2003 Commercial
16. 16
    Mailgun Sinch

    Powerful Transactional Email APIs that enable you to send, receive, and track emails, built with developers in mind. Learn more today!

    Building block Production-ready Developers need to send transactional email and also parse inbound email into their application.

    64 readers a month Since 2010 Commercial
17. 17
    Adobe Marketo Engage Adobe Inc.

    Complete system Production-ready A large B2B marketing team needs complex lead management and has marketing operations specialists.

    Commercial
18. 18
    Customer.io Customer.io

    Customer.io is a customer engagement platform for creating personalized journeys and better business outcomes across email, push, SMS, and in-app messaging.

    Complete system Production-ready A SaaS or app company wants lifecycle messaging triggered by product events and has developers to send the data.

    Commercial
19. 19
    Iterable Iterable

    Iterable is an AI customer engagement platform built for how customers behave today, helping brands respond in real time with unified data and optimization.

    Complete system Production-ready A midsize to large consumer brand wants Braze-class journeys with a strong email focus.

    Commercial
20. 20
    Keap Keap

    Keap is the leading small business CRM and automation platform built exclusively to help small businesses save time and grow without the chaos.

    Complete system Production-ready A solo operator or small service business wants CRM, email campaigns and payments in one tool.

    Commercial
21. 21
    Oracle Eloqua Oracle Corporation

    Complete system Production-ready A large B2B enterprise, often on Oracle CX, needs complex campaign orchestration across regions.

    Commercial
22. 22
    Kit Kit

    Kit (formerly ConvertKit) is the creator-first email marketing and newsletter platform. Grow your audience, automate campaigns, and sell without burnout.

    Complete system Production-ready A creator or solo educator wants to grow a newsletter and sell digital products to subscribers.

    Commercial
23. 23
    Campaign Monitor Marigold

    Create, send, and optimize email campaigns with Campaign Monitor. Build audiences, automate journeys, and improve results with our best-in-class software.

    Complete system Production-ready An agency or design-conscious brand wants well-designed email campaigns without enterprise complexity.

    Commercial
24. 24
    MailerLite MailerLite

    Digital marketing tools to grow your audience faster and drive revenue smarter. Backed by 24/7 award-winning support. Check it out now!

    Complete system Production-ready A small business or creator wants capable email marketing at a low price.

    Commercial
25. 25
    AWeber AWeber

    Looking for free email marketing software? Get started with AWeber for free today. Powerfully-simple email marketing.

    Complete system Production-ready A small business wants straightforward autoresponder email with phone and chat support.

    Commercial
26. 26
    beehiiv beehiiv

    beehiiv is the newsletter platform built for creators, publishers, and businesses. Grow, publish, and monetize your audience in one place.

    Complete system Production-ready A newsletter writer or publisher wants growth and monetisation tools while keeping their own brand and list.

    Commercial
27. 27
    Omnisend Omnisend

    Complete system Production-ready A small online store wants e-commerce email and SMS at a lower price than Klaviyo.

    Commercial
28. 28
    Postmark ActiveCampaign

    Send transactional and marketing emails and get them to the inbox on time, every time. Postmark is a fast and reliable email delivery service for developers.

    Building block Production-ready Password resets, receipts and other critical app email must arrive quickly and reliably.

    Commercial
29. 29
    Resend Resend

    The best way to reach humans instead of spam folders. Deliver transactional and marketing emails at scale.

    Building block Usable A modern web app team, especially using React and Next.js, wants a clean email API that is quick to integrate.

    Commercial
30. 30
    Later Later

    Influencer marketing built for creators and trusted by brands. Run campaigns, manage social media, and track performance with AI-powered insights.

    Complete system Production-ready A brand or creator focused on Instagram and TikTok wants visual planning and influencer campaigns.

    Commercial
31. 31
    Agorapulse Agorapulse

    An easy to use Social Media Management Software that allows you to stay organized, save time, and easily manage your inbox, publishing, reporting, monitoring, and team collaboration tools.

    Complete system Production-ready An agency or small marketing team wants inbox-first social management at a mid-range price.

    Commercial

New open-source projects

1. 1
   37Studio Shaitrish

   Open-source AI alternative to Buffer and Opus Clip: Claude Code makes on-brand videos, posts them to 9 platforms and drafts replies. Self-hosted, your own keys.

   Complete system Experimental A small business already uses Claude Code and wants to experiment with AI-made social video.

   ★ 56 MIT Go Active, pushed 9 days ago
2. 2
   MailCheap marclou

   Newsletters where you pay for the emails you send, not for dormant subscribers, at a fraction of the price of beehiiv and the like. Open source: self-host it, or use mailcheap.ai.

   Complete system Experimental A newsletter with many inactive subscribers wants to cut costs compared with beehiiv or Mailchimp.

   ★ 1.4k AGPL-3.0 JavaScript Active, pushed 9 days ago
3. 3
   Thinkwithblack-skill backtrue

   365 free AI marketing skills (zh-TW/en) for ChatGPT, Claude, Gemini, Claude Code & Cursor — copywriting, ads budget, margin, CRM, email. 365 個免費 AI 行銷 Skills

   List, course or other material Experimental A Taiwanese or Chinese-speaking marketer wants a large set of ready prompts.

   ★ 249 MIT Python Active, pushed 2 days ago
4. 4
   CogSend cogsend

   Self-hosted social media scheduler. Write once, publish to any connected platform. Runs on your own Cloudflare account.

   Complete system Experimental You want cheap self-hosted scheduling without managing a server and already use Cloudflare.

   ★ 253 MIT TypeScript Active, pushed 12 days ago
5. 5
   Growth-engineer GetBrew

   Open-source catalog of go-to-market tools and workflows, written as markdown files any agent can run. Includes a read-only MCP server.

   List, course or other material Experimental You use AI agents for sales and marketing work and want a reference of which tools can do what.

   ★ 246 MIT TypeScript Active, pushed 22 days ago
6. 6
   Prod-FARM-IOS-Core Git-Agni

   A farm of real iPhones, run from your Mac. Open-source iOS device automation with live control, a Postgres-backed scheduler, and TikTok workflows. Self-hosted, Apache-2.0.

   ★ 1.7k Apache-2.0 TypeScript Active, pushed 2 months ago
7. 7
   SeaLeap Amazon Skills xjli360

   Reusable Agent Skills for Amazon product research, listings, advertising, inventory, and operations.

   List, course or other material Experimental A Chinese-speaking Amazon seller wants structured playbooks to feed an AI agent.

   ★ 298 MIT Python Active, pushed 18 days ago
8. 8
   MillionSend MillionSend

   The open-source email platform — self-host on your own AWS SES, or use the cloud. Resend-compatible API.

   Complete system Experimental You use Resend's API but want to self-host on SES to cut costs.

   ★ 258 AGPL-3.0 TypeScript Active, pushed 6 days ago
9. 9
   SandBase Skills sandbaseai

   88 installable open-source Agent Skills for research, social intelligence, marketing, and business workflows—compatible with Codex, Claude Code, Cursor, Gemini CLI, and DeepSeek Harness.

   List, course or other material Experimental You use an AI coding agent for market research and want ready-made skill files to try.

   ★ 202 Apache-2.0 Python Active, pushed 38 days ago

Open-source marketing automation platforms

Complete systems you can adopt 7

1. 1
   Postiz-app gitroomhq

   📨 The ultimate agentic social media scheduling tool 🤖

   Complete system Usable You manage several social accounts and want a Buffer alternative you can self-host or buy hosted.

   ★ 41k AGPL-3.0 TypeScript Active, pushed today
2. 2
   Listmonk knadh

   High performance, self-hosted, newsletter and mailing list manager with a modern dashboard. Single binary app.

   Complete system Production-ready You send newsletters to large lists and want to pay only for SMTP or SES instead of per-subscriber pricing.

   ★ 24k AGPL-3.0 Go Active, pushed 2 days ago
3. 3
   Postal postalserver

   📮 A fully featured open source mail delivery platform for incoming & outgoing e-mail

   Complete system Production-ready You send large volumes of transactional email and want your own Sendgrid-style platform on your own IPs.

   ★ 17k MIT Ruby Active, pushed 4 days ago
4. 4
   Plunk useplunk

   The Open-Source Email Platform

   Complete system Usable You want one open-source tool for both product emails and newsletters on AWS SES.

   ★ 5.6k AGPL-3.0 TypeScript Active, pushed 2 days ago
5. 5
   useSend usesend

   Open source alternative to Resend, Sendgrid, Postmark etc.

   Complete system Usable You want Resend or Postmark convenience at SES prices, hosted or self-hosted.

   ★ 4.8k AGPL-3.0 TypeScript Active, pushed 3 days ago
6. 6
   BillionMail Billionmail

   BillionMail gives you open-source MailServer, NewsLetter, Email Marketing — fully self-hosted, dev-friendly, and free from monthly fees. Join the discord: https://discord.gg/asfXzBUhZr

   Complete system Usable You want to run your own mail server and campaigns together and know how to manage IP reputation.

   ★ 16k AGPL-3.0 Go Slowing, pushed 5 months ago
7. 7
   Dittofeed dittofeed

   Open-source customer engagement. Automate transactional and marketing messages across email, SMS, mobile push, WhatsApp, Slack, and more 📨

   Complete system Usable You want Customer.io or Braze-style lifecycle messaging that you can self-host, and have engineers to wire in your event data.

   ★ 3k MIT TypeScript Active, pushed 21 days ago

Frameworks and platforms to build on 1

1. 1
   MJML mjmlio

   MJML: the only framework that makes responsive email easy

   Framework or platform Production-ready Anyone who hand-codes HTML emails and wants them to render in Outlook and Gmail without table hacks.

   ★ 18k MIT JavaScript Active, pushed 10 days ago

Integrations 1

1. 1
   React Email Editor unlayer

   Drag-n-Drop Email Editor Component for React.js

   Integration Production-ready Your product needs users to design emails or newsletters inside it.

   ★ 5.3k MIT TypeScript Active, pushed 2 days ago

Developer tools 1

1. 1
   React Email resend

   💌 Build and send emails using React

   Developer tool Production-ready Your team writes React and wants maintainable, previewable email templates for any sending provider.

   ★ 20k MIT TypeScript Active, pushed 3 days ago

All 85 open-source marketing automation projects

Compared head to head

Looking for an alternative to

Open-source licenses

• Permissive: 61. Use it anywhere, including in closed products. You keep the copyright notice; Apache-2.0 also grants patent rights.
• Network copyleft: 21. Like GPL, and running a changed version as a web service counts as distributing it, so its users get the source too.
• Strong copyleft: 3. If you distribute the program or anything built on it, you must release the whole source under the same license.

Languages

TypeScript 27, Python 15, JavaScript 10, Go 9, PHP 8, HTML 3, Ruby 2, Elixir 2, C# 2, Vue 1, PowerShell 1, Perl 1 and Rust 1.