The numbers speak for themselves – businesses make $44 for every dollar they invest in email marketing. Developers looking for the best email marketing tools for developers will find this ROI stat impressive. This return is a vital reason why email marketing powers modern applications.

Email communication continues to grow rapidly. Users send 360 billion emails daily in 2024, and experts project this number will reach 400 billion by 2027. Your choice of email marketing platform matters more than ever. Each platform brings its own API capabilities and developer-friendly features to the table.

We tested and analyzed top email marketing platforms built with developers in mind. Our analysis focused on API support, integration options, and scalability features. This detailed guide will help you pick the right email marketing solution that fits your development needs, whether you’re creating a small app or enterprise software.

9 Best Email Marketing Tools for Developers

Email Marketing Tool	API Features	Integrations	Key Developer Features	Price
CampaignHQ	Custom integration building, Immediate data sync	– AWS SES – API access – Zapier – JotForm – HubSpot	Dynamic content support, Automated workflow management	$7/month
Mailchimp	Batch operations, Webhooks, Campaign management	-OAuth 2.0 -E-commerce integration -Custom field mapping	Data management, Template management, File Manager access	Free tier available
Constant Contact	REST-based, JSON support, SSL/TLS v1.2	-OAuth 2.0 -Webhook notifications	Bulk activity management, UUID format, Custom field management	$12/month
Omnisend	REST architecture, JSON formatting, Error logging	-130+ pre-built integrations -Facebook Lead Ads -Google Ads	Developer console access, Immediate monitoring, Custom workflow creation	$16/month
Benchmark Email	XML-RPC and RESTful API, Campaign management	-WordPress -Zoho -Slack -Zapier	Custom HTML editor, Smart Content AI, Advanced segmentation	$39/month
GetResponse	REST API, JSON format, Custom auth headers	-170+ pre-built integrations -E-commerce platforms	List management, Campaign management, Template creation	Not mentioned
MailerLite	RESTful endpoints, JSON formatting, Batch operations	-Shopify -WooCommerce -WordPress -Zapier	Custom HTML editor, Workflow editor, Password protection	$10/month
ActiveCampaign	REST-based, JSON schema, Resource-based endpoints	-900+ tool integrations -Native connections -Webhooks	Developer sandbox, App Studio portal, Custom app development	Not mentioned
Brevo	Campaign management, Batch processing, Webhooks	-150+ digital tool connections -WordPress -WooCommerce	Developer mode, YAML editor, Custom code implementation	$9/month

1. CampaignHQ

CampaignHQ is a versatile email marketing platform that combines economical solutions with strong developer-focused features. On top of that, it makes shared integration possible for both email and WhatsApp marketing needs.

CampaignHQ API Features

CampaignHQ gives developers a powerful API to populate contacts, trigger emails, and build custom integrations. The platform supports immediate data synchronization that helps developers maintain consistent contact information in multiple systems.

CampaignHQ Developer Features

The platform comes with several developer-focused capabilities:

• Custom Integration Building: Developers can create tailored solutions using the platform’s extensive API documentation
• Dynamic Content Support: The platform personalizes messages with dynamic content that improves engagement rates
• Automated Workflow Management: Developers can set up unlimited automation workflows for both email and WhatsApp campaigns

CampaignHQ Integration

CampaignHQ offers flexible integration options for developers:

• AWS SES Integration: Connect multiple AWS SES accounts to route emails through your infrastructure
• WhatsApp Business API: Direct integration with WhatsApp Cloud API for messaging capabilities
• Template Management System: Complete system to manage both email and WhatsApp templates

CampaignHQ Pricing for Developers

The platform provides economical pricing structures that fit different developer needs:

Email Connect Premium Plan:

• Starting at $5 per month
• Unlimited automation workflows
• Unlimited email verifications
• Connect multiple AWS SES accounts
• AI-assisted email subject line suggestions
• 5 users included

Email Regular Premium Plan:

• Starting at $7 per month
• Managed email servers with no setup required
• 10,000 emails included
• All premium features available
• Live customer support

WhatsApp Integration Plans:

• Regular Premium: $12 per month plus message charges
• Connect Premium: $12 platform fee monthly for using your WhatsApp Cloud API

The platform excels at providing adaptable solutions, shown by its range-based pricing for email verification services:

• 1-5,000 emails: $0.15 per email
• 5,001-10,000 emails: $0.14 per email
• 10,001-50,000 emails: $0.13 per email

CampaignHQ tracks detailed analytics of key metrics like delivery rates, engagement, and conversions. This helps developers optimize their email marketing strategies based on real data.

2. Mailchimp

Mailchimp stands out as a dynamic email marketing platform that gives developers extensive API capabilities and integration options. Their Marketing API lets developers access Mailchimp data and functionality to build custom features.

Mailchimp API Capabilities

The Marketing API supports these key functions:

• Database synchronization with email activity and campaign analytics
• Programmatic management of audiences and campaigns
• Batch operations for large data handling
• Webhook-based data synchronization in real time

API calls have a 120-second timeout limit and allow 10 simultaneous connections. Developers working with large data volumes can use batch processing to stay within API request limits.

Mailchimp Integration Options

Mailchimp delivers strong integration features through:

• Secure data access with OAuth 2 authentication
• Data synchronization through webhooks
• External platform field mapping
• Product retargeting with e-commerce store integration

Partners must meet specific requirements to join the Integration Partner Program. These include having 25+ active users within 90 days and enabling at least three core Mailchimp features.

Mailchimp Developer Features

The platform provides these detailed developer features:

• Data Management:
  • Audience segmentation options
  • Workflow automation tools
  • Event-triggered messaging systems
• Integration Tools:
  • Marketing API endpoints
  • File Manager access
  • Template management system

Developers can send targeted and event-triggered messages with high deliverability rates using both Marketing API and Transactional Email services.

Mailchimp Pricing Structure

Mailchimp structures its pricing across four tiers:

Premium Plan:

• Customizable contact limits
• 15x monthly email send limit
• Unlimited audiences
• Advanced segmentation tools

Standard Plan:

• Contact limit: 100,000 at $800/month
• Monthly emails: 12x contact limit
• 5 audiences included

Essentials Plan:

• Contact limit: 50,000 at $385/month
• Monthly sends: 10x contact limit
• 3 audiences allowed

Free Plan:

• 500 contacts maximum
• 1,000 monthly emails
• 500 daily email limit
• Single audience only

Seasonal marketers and quarterly update senders can choose the Pay As You Go option starting at $150 for 5,000 credits. Verified nonprofit organizations receive a 15% discount.

3. Constant Contact

The Constant Contact V3 API strengthens developers through its REST-based architecture. It supports JSON and has improved security features. This strong platform forms the foundation for creating custom-coded solutions that integrate smoothly.

Constant Contact API Overview

The V3 API infrastructure guarantees 99.9% uptime. This makes it a dependable choice for critical applications. The platform supports:

• OAuth 2.0 authentication with both client and server authorization flows
• SSL with TLS v1.2 and AES encryption
• JSON-formatted request payloads and responses
• RESTful resource structure with detailed HTTP methods

Constant Contact Developer Features

The platform offers several developer-focused capabilities that simplify email marketing integration:

Bulk Activity Management

• Background processing happens asynchronously for large-scale operations
• Single API calls can manage thousands of contacts
• Daily rate limits reach 10,000 calls with 4 calls per second

Advanced Integration Options

• Full HTML email creation and modification capabilities
• Custom field management with flexible naming rules
• Live webhook notifications track events
• Detailed contact segmentation features

Technical Capabilities

• UUID format identifies resources
• PATCH requests enable partial updates
• JSON format provides clear error messages

Constant Contact Pricing Plans

The platform has three pricing tiers that fit different business needs:

Lite Plan:

• $12/month starts with 500 contacts
• Simple email marketing features
• Single user access

Standard Plan:

• $35/month begins with 500 contacts
• Marketing automation capabilities
• Advanced segmentation tools
• Subject line A/B testing
• Three user accounts

Premium Plan:

• $80/month to start
• Custom automation workflows
• Advanced segmentation capabilities
• Unlimited user access
• SEO tools and improved analytics

Developers who need more power can join the Technology Partner Program. This increases API limits to 250,000 calls per day and up to 10 calls per second. This works well for applications with a large customer base.

Nonprofit organizations get special pricing benefits:

• 20% discount with 6-month prepayment
• 30% discount with 12-month prepayment

The platform uses a ‘send allowance’ system. Automated emails like welcome messages and abandoned cart reminders don’t count toward email send allowances. Developers can build sophisticated automation workflows without worrying about usage limits.

4. Omnisend

Omnisend stands out with its REST API architecture that gives developers a great way to get email marketing automation. Their v5 API comes with improved capabilities and makes an excellent choice for custom integrations and feature-rich applications.

Omnisend API Features

The platform’s API infrastructure supports:

• REST-based architecture with JSON formatting
• Rate limits of 400 requests per minute
• OAuth 2.0 authentication for secure access
• Strong error logging and debugging tools

Response headers provide up-to-the-minute data analysis:

• X-Rate-Limit-Limit: Shows allowed requests per period
• X-Rate-Limit-Remaining: Displays remaining requests
• X-Rate-Limit-Reset: Indicates time until limit reset

Omnisend Integration

The platform shines with its integration capabilities through:

• Over 130 pre-built integrations that centralize your tech stack
• Support for custom integrations through flexible APIs
• Direct synchronization with Facebook Lead Ads
• Google Ads integration for list and segment synchronization

Developers get access to a dedicated console that monitors data exchange between stores and third-party applications. This console lets you:

• Verify integration success
• Track and troubleshoot errors
• Filter requests by endpoints
• Monitor methods and status codes

Omnisend Developer Features

The platform packs powerful developer-focused capabilities:

Developer Console Access:

• Up-to-the-minute access log monitoring
• Detailed error tracking
• Integration debugging tools

Automation Capabilities:

• Event-driven messaging
• Custom workflow creation
• Product abandonment tracking
• Browse abandonment automation

Omnisend Developer Pricing

The platform comes with three distinct pricing tiers:

Free Plan:

• Perfect for starting businesses
• Access to core features
• Limited contact management

Standard Plan:

• Starts at $16/month
• Unlimited push notifications
• Up to 1,000 product reviews
• Complete feature access

Pro Plan:

• Starts at $59/month
• Unlimited emails and notifications
• Unrestricted product reviews
• Free SMS credits
• Dedicated support manager (for plans over $400/month)

Developers can save 30% with quarterly prepayment subscriptions. The pricing adjusts based on your contact list size, which helps growing businesses scale smoothly. You can pick your preferred billing tier and manage send limits instead of deleting contacts to control costs.

5. Benchmark Email

Benchmark Email provides a reliable API infrastructure that makes shared integration between database programs and email marketing systems smooth. Their XML-RPC and PHP-based API offerings have no extra charges. Developers will find this an affordable choice.

Benchmark Email API Capabilities

The API architecture has four main categories:

• Campaign Management: Create, copy, and schedule email campaigns programmatically
• Contact List Operations: Handle subscriber management and list updates
• Reports Analytics: Get detailed campaign statistics
• Security Protocols: Generate and manage authentication tokens

Developers can choose between XML-RPC and RESTful API implementations. The RESTful API supports various HTTP methods like GET, POST, PATCH, and DELETE operations.

Benchmark Email Integration

Third-party integrations work exceptionally well through:

Pre-built Connections:

• WordPress integration supporting up to five separate email accounts
• Zoho contacts synchronization
• Slack channel integration
• Stripo email template builder connection

Automation Capabilities:

• Zapier integration connecting with 1,500+ web services
• Acuity Scheduling contact synchronization
• Automated customer data syncing including order information

Benchmark Email Developer Features

Developers get access to extensive capabilities:

Core Features:

• Event notification system for list synchronization
• Custom HTML editor for sophisticated users
• Smart Content AI tool with 100 monthly credits for content generation
• Advanced segmentation based on contact activity

Testing and Optimization:

• A/B testing functionality
• Multi-device preview options
• Email performance comparison tools

Benchmark Email Pricing

You can choose from several pricing options:

Send-Based Plans:

• 10,000 emails: $39/month
• 50,000 emails: $149/month
• 100,000 emails: $249/month
• 250,000 emails: $449/month

Contact-Based Plans:

• Free: Up to 500 contacts
• Lite: Maximum 50,000 contacts
• Pro: Up to 100,000 contacts
• Enterprise: Starting at 25,000 contacts

Add-on Services:

• List Verification: $3.00 per 1,000 contacts
• Image Hosting Upgrade: $5.00 monthly for unlimited storage
• Dedicated IP: $28.95 monthly
• Inbox Checker: $14.00 per 100 tests

Large senders can get volume discounts. Smart Sending technology uses machine learning to improve inbox placement rates. Developers earn a 25% commission through the partner program when they bring in new clients.

6. GetResponse

GetResponse developers can automate email marketing tasks through programmatic access with its strong REST API. The API endpoint stays at https://api.getresponse.com/v3, which ensures stable long-term integrations.

GetResponse API Documentation

The API infrastructure supports:

• REST-based resource naming conventions
• Three primary HTTP methods: GET, POST, and DELETE
• JSON data format with camelCase field naming
• Custom authentication headers for secure access

Security measures include automatic key regeneration after 90 days of inactivity. The platform’s rate limits allow:

• 30,000 API calls per 10-minute window
• 80 API calls per second

GetResponse Integration

The platform makes continuous connections possible through:

Core Integration Features:

• List management functions for subscriber handling
• Campaign creation and distribution capabilities
• Complete statistics tracking

GetResponse works with over 170 pre-built integrations among custom API implementations for specialized needs. E-commerce integrations stand out with native connections to:

• Shopify
• Magento
• PrestaShop

GetResponse Developer Features

Sophisticated developer tools focus on:

List Management:

• Automated subscriber handling
• Profile updates from external servers
• List cleaning and maintenance

Campaign Management:

• Template creation and modification
• Scheduled campaign distribution
• Reusable campaign components

GetResponse Developer Plans

Three distinct pricing tiers are available:

Starter Plan:

• 3 users included
• 1 automation workflow
• 3 AI tool uses
• Simple e-commerce integration

Marketer Plan:

• 5 user accounts
• Unlimited automation workflows
• Complete e-commerce tools
• Unlimited landing pages

Creator Plan:

• 5 user collaboration accounts
• Advanced course creation tools
• Paid newsletter capabilities
• Webinar hosting for 100 attendees

GetResponse MAX serves enterprise-level needs with:

• Dedicated customer experience manager
• Custom sending infrastructure
• Professional services
• SMS marketing capabilities

List size options range from 1,000 to 100,000 contacts. Nonprofit organizations get a 50% discount on any plan, which makes it cost-effective for charitable institutions.

7. MailerLite

MailerLite’s RESTful API architecture stands out with its powerful integration capabilities and developer-friendly features. The platform launched its latest API version in March 2022 and uses date-based versioning to give users consistent updates and improvements.

MailerLite API

The platform’s API infrastructure delivers these powerful features:

• RESTful endpoints with JSON formatting
• Rate limits of 120 requests per minute
• Secure authentication using API keys
• Batch operations to optimize requests

Developers need to include API keys in the Authorization header of requests to boost security. The platform adds rate limit headers that show remaining requests and reset times automatically.

MailerLite Integration

MailerLite shines with its range of integration options:

E-commerce Connections:

• Native Shopify customer synchronization
• WooCommerce integration
• PrestaShop connectivity
• Stripe payment processing

Marketing Tool Integration:

• Adobe Express design synchronization
• WordPress plugin support
• Zapier automation capabilities
• Custom HTML code injection

MailerLite Developer Features

The platform comes packed with powerful developer tools:

Core Capabilities:

• Custom HTML editor access
• Unsubscribe page builder
• Password protection features
• Advanced website functionalities

Automation Tools:

• Workflow editor to nurture subscribers
• Custom path creation
• Self-segmentation capabilities
• RSS campaign automation

MailerLite Pricing

The platform gives you three main pricing tiers:

Free Plan:

• Up to 1,000 subscribers
• Essential feature access
• 10 landing pages
• Website building capabilities

Growing Business Plan:

• Starts at $10/month
• RSS campaign creation
• AutoResend capabilities
• Unlimited websites
• Template design tools

Advanced Plan:

• Starts at $20/month
• Unlimited account users
• Custom HTML editor
• Advanced website features
• Password protection options

Developers who need transactional email features can check out MailerSend’s additional plans:

• Hobby Plan: 3,000 emails monthly at no cost
• Professional Plan: 50,000 emails monthly with advanced features
• Custom Enterprise solutions for larger volumes

The platform bases its pricing on subscriber count and feature needs. The Professional plan lets developers use multiple sending domains, manage templates, and access webhook functionality. The platform’s high-ranking deliverability makes sure messages reach their destination while immediate analytics help optimize campaign performance.

8. ActiveCampaign

Over 180,000 businesses trust ActiveCampaign’s platform to deliver a complete email marketing solution through its REST-based API architecture. The platform’s Version 3 API uses HTTP methods to manage resources and JSON formatting for smooth data exchange.

ActiveCampaign API

The platform’s API infrastructure works through:

• Resource-based endpoint organization
• HTTP methods for action indication
• JSON schema for data representation
• Conventional REST architecture

Each developer gets unique API credentials with their own API URLs and keys. The platform lets users reset their API keys through the Developer Settings page for better security.

ActiveCampaign Integration

The platform shines in its ability to connect through:

Native Connections:

• Shopify deep data integration
• Slack digital HQ automation
• Zoho CRM bridging
• WooCommerce synchronization

Integration Methods:

• Direct API implementation
• Middleware solutions like Zapier
• Custom webhook development
• Auto-import tool functionality

Users can choose from four main integration types:

1. Native integrations with deep data capabilities
2. Auto-import tool for contact synchronization
3. Third-party middleware connections
4. Custom integrations using API credentials

ActiveCampaign Developer

Developers get access to powerful tools:

Development Environment:

• Free developer sandbox account
• App Studio self-serve portal
• Independent code testing capabilities
• Direct ecosystem deployment

Technical Features:

• App configuration management
• Sandbox testing environment
• Private app release options
• Customer privacy protection

ActiveCampaign Cost Structure

The platform comes with four distinct pricing tiers:

Starter Plan:

• Simple email marketing features
• Basic automation capabilities
• Contact organization tools

Plus Plan:

• Advanced marketing automation
• Campaign optimization features
• Better audience engagement tools

Professional Plan:

• Full omnichannel marketing
• Cohesive strategy creation
• Smooth customer experience tools

Enterprise Plan:

• Dedicated security measures
• Complete support
• Custom reporting capabilities

The platform stands out with its CRM add-ons:

• Pipelines: Advanced pipeline management starting at $68/month
• Sales Engagement: 1:1 email capabilities with AI analysis
• Custom Reporting: 50 reports and 25 dashboards for $159/month

ActiveCampaign works with over 900 tools, including:

• Gmail and Outlook
• Google, Facebook, and LinkedIn ads
• PayPal and Stripe
• Standard and premium CRM solutions

9. Brevo

Brevo’s detailed toolkit helps turn casual browsers into loyal customers with its email marketing capabilities. The platform stands out from other email marketing tools because of its developer-first approach.

Brevo Developer API

The platform’s API infrastructure supports key operations through:

• Email campaign management with customizable scheduling
• Batch processing for large-scale operations
• Contact management with Double-Opt-In flows
• Up-to-the-minute event tracking through webhooks

The API uses rate limits to maintain peak performance and provides detailed error codes to troubleshoot issues. Each response comes with error codes and human-readable descriptions that help developers identify and fix problems quickly.

Brevo Developer Features

The platform has sophisticated tools for developers:

Advanced Customization:

• Developer mode in Drag & Drop editor
• YAML code editor integration
• Custom code implementation
• Mobile-responsive design capabilities

Technical Capabilities:

• Email design preview in real time
• Automated error detection
• Search functionality within developer mode
• Advanced email customization options

Brevo Integration Options

The platform excels at providing multiple integration methods:

Core Integration Features:

• Access to 150+ digital tool connections
• WordPress plugin support
• WooCommerce compatibility
• Shopify integration

Tech companies can use the Integration Program to:

• Access detailed API documentation
• Merge with existing systems
• Showcase technology to 500,000+ users
• Get dedicated integration support

Brevo Pricing

The platform offers three main pricing tiers:

Free Plan:

• 100,000 contacts storage
• 300 emails per day limit
• Marketing automation features
• CRM functionality

Starter Plan:

• Starting at $9.00 monthly
• No daily sending limit
• Simple reporting capabilities
• Email support access

Business Plan:

• Beginning at $18.00 monthly
• Landing page functionality
• Multi-user access
• Advanced reporting tools

Enterprise-level solutions come with:

• Flexible email volumes
• Dedicated support
• Advanced automation features
• Custom integration options

Pay As You Go options make the platform ideal for occasional senders who need flexibility without long-term commitments. Developers also get access to transactional email capabilities, SMS credits, and optional add-ons based on their project needs.

Conclusion

Email marketing tools come with their own special advantages for developers. CampaignHQ shines with AWS SES integration at great prices. Mailchimp does e-commerce really well. The core team at Constant Contact built a strong API system, and Omnisend leads the pack with automation.

Our comparison table shows exactly how these platforms stack up against each other. This makes it easy to match your technical needs with the right features.

Explore CampaignHQ’s complete email marketing features to find the best fit for your development projects.

Your email marketing success depends on picking a tool that matches your tech stack, budget and growth needs. The quality of API docs, how fast you get support, and future pricing should shape your final choice.

FAQs