How Does Email Marketing Work?
Understand how email marketing works: from lead generation to campaign automation. Discover how this strategy strengthens your business and boosts sales.
2 mins read
Mariana A.
Learn about some of the best free marketing automation tools.
Marketing automation allows businesses to speed up sales processes, improve lead capture and increase customer retention. Any website focused on lead generation or online sales should rely on a tool that supports process automation.
In this shortlist, we’ve gathered some of the best marketing automation platforms that offer free plans, ideal for companies that are just getting started.
You can also learn more about email marketing in our article:
👉 How does Email Marketing work?
HubSpot
E-goi
Mailchimp
Klaviyo
Sendinblue
HubSpot is a marketing automation platform that has been growing rapidly worldwide. Its main advantage is offering a free CRM available to all users.
Over the years, HubSpot has significantly expanded its integrations and now competes with major players such as Salesforce.
CRM
Forms
Email marketing
Outlook and Gmail integration
Ads management
Live chat
Up to 1,000,000 contacts
Native integration with hundreds of applications
Zapier integration
Free CRM
Highly scalable platform
Startup-friendly plans
No user limit
Can become expensive as your business grows
Advanced automation only available in higher-tier plans
Limited AI features
👉 Want to work with HubSpot? Contact us.
E-goi is a Portuguese marketing automation platform, mainly used in Portugal and Brazil.
It’s a very powerful and comprehensive tool, although not the most user-friendly for beginners. One of its biggest strengths is its multichannel communication.
Forms
Landing page creation
Social media integrations
Ads management
Unlimited email campaigns for up to 100 contacts
Web Push notifications
Zapier integration
WhatsApp integration
Automation features
Integrations with WordPress and Shopify
Excellent value for money
Limited number of native integrations
No sales CRM
No advanced artificial intelligence
Mailchimp is one of the most popular tools for small businesses, especially for WordPress websites.
It offers a very intuitive email builder and now includes basic artificial intelligence features.
Up to 2,000 contacts
Send up to 10,000 emails per month
Social media integration
One audience
Forms
Zapier integration
Automation features
Integrations with WordPress and Shopify
Coupon management
Basic AI tools
No sales CRM
Automation limitations
Multiple audiences increase costs
Limited A/B testing
No visual workflow builder
👉 Need help with Mailchimp? Contact us.
When it comes to Shopify stores, Klaviyo is often the go-to solution.
Its Shopify integration is excellent, and the built-in automation “recipes” make it easy for ecommerce brands to get started quickly.
Up to 250 contacts
500 emails per month
Automation
Forms
Social media integrations
Zapier integration
Advanced automation
Native Shopify integration
Coupon management
Basic AI features
SMS campaigns
No sales CRM
Paid plans can be expensive
Limited communication channels
Not fully omnichannel
👉 Want to work with Klaviyo? Contact us.
To close our list, we highlight Sendinblue, a French platform known for offering one of the most complete free plans on the market.
It provides native integrations with Shopify, WordPress, Prestashop and Magento.
Unlimited contacts
Up to 300 emails per day
Live chat
SMS marketing
Automation
Forms
Marketing CRM
Automation features
Zapier integration
SMS campaigns
Built-in forms
No sales CRM
Limited communication options
Not fully omnichannel
If you haven’t chosen your marketing automation solution yet, Link37 can help you select and implement the right platform for your business.
👉 Contact us and let’s find the best solution together.
Related articles
How Does Email Marketing Work?
Understand how email marketing works: from lead generation to campaign automation. Discover how this strategy strengthens your business and boosts sales.
Mariana A.
February 12, 2026
Related articles
HubSpot vs Salesforce: Which CRM is Best for Your Business?
Unlock the secret to streamlined operations and accelerated growth in the manufacturing sector by choosing the right CRM—HubSpot or Salesforce.
Pedro Duarte Almeida
December 03, 2025