# ActiveCampaign Postmark vs Campaign Monitor Comparison --- ## AI Generated Summary - **G2 reviewers report** that Campaign Monitor excels in its **template creation** capabilities, with users praising the drag-and-drop functionality that makes it easy to design email campaigns. One user highlighted the software's ability to segment customers effectively based on various criteria, enhancing targeted marketing efforts. - **Users say** that ActiveCampaign Postmark stands out for its **reliability in transactional email delivery**. Reviewers appreciate the quick setup of SMTP servers, allowing them to get started in minutes, which is particularly beneficial for businesses needing immediate solutions. - **According to verified reviews** , Campaign Monitor has a strong focus on **data insights** , with users noting its ability to scan and filter databases to remove invalid email addresses. This feature helps maintain a high-quality email list, which is crucial for effective campaigns. - **Reviewers mention** that ActiveCampaign Postmark offers a user-friendly interface that simplifies the process of sending transactional emails. Users have noted the platform's fast email delivery and reliable tracking, making it a solid choice for businesses focused on operational efficiency. - **G2 reviewers highlight** that while Campaign Monitor has a robust feature set, it may not always meet the specific workflow needs of all users, leading to some configuration challenges. This feedback suggests that while the platform is powerful, it may require a learning curve for optimal use. - **Users report** that ActiveCampaign Postmark's support quality is commendable, with many praising the responsiveness and helpfulness of the support team. This aspect can be a significant advantage for businesses that prioritize ongoing assistance and troubleshooting. | | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Star Rating** | 4.6 out of 5 | 4.1 out of 5 | | **Total Reviews** | 32 | 731 | | **Largest Market Segment** | Small-Business (62.5% of reviews) | Small-Business (54.0% of reviews) | | **Entry Level Price** | Free Trial | Starting at $13.00 Per Month | --- ## Top Pros & Cons ### ActiveCampaign Postmark Pros: - Deliverability (2 reviews) - Easy Setup (2 reviews) Cons: - Expensive (1 reviews) - Poor Customer Support (1 reviews) ### Campaign Monitor Pros: - Ease of Use (21 reviews) - User-Friendly (15 reviews) Cons: - Missing Features (11 reviews) - Email Issues (7 reviews) --- ## Ratings Comparison | Rating | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Meets Requirements** | 9.4 (27 reviews) | 8.4 (635 reviews) | | **Ease of Use** | 9.2 (26 reviews) | 8.6 (639 reviews) | | **Ease of Setup** | 9.3 (16 reviews) | 8.6 (323 reviews) | | **Ease of Admin** | 9.7 (11 reviews) | 8.7 (306 reviews) | | **Quality of Support** | 8.9 (26 reviews) | 8.2 (535 reviews) | | **Has the product been a good partner in doing business?** | 9.7 (10 reviews) | 8.6 (286 reviews) | | **Product Direction (% positive)** | 8.1 (24 reviews) | 7.5 (614 reviews) | --- ## Pricing ### ActiveCampaign Postmark #### Entry-Level Pricing Plan: Free Trial Price: Free Trial Description: Everyone starts on our free Developer tier, which includes 100 emails every month. And it never expires or runs out. Key Features: - 100 emails per month [Browse all 4 editions](https://www.g2.com/products/activecampaign-postmark/pricing) #### Free Trial Yes ### Campaign Monitor #### Entry-Level Pricing Plan: Lite Price: Starting at $13.00 Per Month Description: Great for just getting started. Key Features: - Send up to 2,500 emails per month - Drag & Drop Builder - Customizable Template Library [Browse all 3 editions](https://www.g2.com/products/campaign-monitor/pricing) #### Free Trial Yes --- ## Features Comparison By Category ### Email Marketing | Product | Score | Reviews | |---|---|---| | **ActiveCampaign Postmark** | N/A | N/A | | **Campaign Monitor** | 8.3/10 | 574 | #### Email Marketing | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Email and Mobile Preview** | Not enough data | 8.9 (525 reviews) ✓ Verified | | **Manage Email Lists** | Not enough data | 8.2 (531 reviews) ✓ Verified | | **High-Volume Sending** | Not enough data | 8.6 (483 reviews) ✓ Verified | | **Building and Personalizing Emails** | Not enough data | 8.5 (528 reviews) ✓ Verified | | **Sending Outbound Emails** | Not enough data | 8.9 (521 reviews) ✓ Verified | | **Manage Email Deliverability** | Not enough data | 8.5 (498 reviews) ✓ Verified | | **Automated Email Responses** | Not enough data | 8.3 (391 reviews) ✓ Verified | | **Multi-user Account** | Not enough data | 8.5 (131 reviews) ✓ Verified | | **Surveys** | Not enough data | 8.1 (99 reviews) | #### Reporting & Analytics | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **A/B Testing** | Not enough data | 8.4 (367 reviews) ✓ Verified | | **Basic Reporting** | Not enough data | 8.6 (504 reviews) ✓ Verified | #### Generative AI | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **AI Text Generation** | Not enough data | 8.3 (5 reviews) | | **AI Text Summarization** | Not enough data | Feature Not Available | #### Agentic AI - Email Marketing | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Autonomous Task Execution** | Not enough data | Not enough data | | **Autonomous Task Execution** | Not enough data | Not enough data | | **Multi-step Planning** | Not enough data | Not enough data | | **Cross-system Integration** | Not enough data | Not enough data | | **Cross-system Integration** | Not enough data | Not enough data | #### Integration | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Data Import & Export Tools** | Not enough data | 8.4 (238 reviews) ✓ Verified | | **Integration APIs** | Not enough data | 8.3 (185 reviews) ✓ Verified | | **Breadth of Partner Applications** | Not enough data | 7.8 (162 reviews) ✓ Verified | | **CRM Integration** | Not enough data | 7.9 (57 reviews) | | **Social Media Integration** | Not enough data | 7.7 (60 reviews) | | **E-Commerce Integration** | Not enough data | 7.7 (56 reviews) ✓ Verified | ### Transactional Email | Product | Score | Reviews | |---|---|---| | **ActiveCampaign Postmark** | 8.9/10 | 23 | | **Campaign Monitor** | 9.0/10 | 20 | #### Administration | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Template Creation** | 8.2 (12 reviews) | 9.5 (20 reviews) | | **Preset Template Availability** | 7.6 (12 reviews) | 8.8 (19 reviews) | | **Custom Unsubscribe** | Feature Not Available | 8.8 (19 reviews) | | **Email Segmentation** | Feature Not Available | 8.9 (19 reviews) | | **Detailed Server Logs** | 9.0 (19 reviews) | 9.2 (16 reviews) | | **Notifications** | 9.4 (14 reviews) | 9.4 (19 reviews) | #### Integrations | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Webhooks** | 9.6 (15 reviews) | 9.0 (15 reviews) | | **Event Tracking API** | 9.4 (12 reviews) | 8.9 (17 reviews) | | **Mail Send API** | 9.8 (17 reviews) | 9.1 (16 reviews) | | **Spam Filter Testing** | 8.8 (10 reviews) | 8.6 (18 reviews) | #### Platform | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Custom Tracking Domain** | Feature Not Available | 9.1 (19 reviews) | | **Multiple Domains** | 8.8 (13 reviews) | 9.4 (17 reviews) | | **Dedicated IP** | 8.6 (11 reviews) | 9.1 (17 reviews) | | **Documentation** | 9.2 (17 reviews) | 9.1 (17 reviews) | | **Sender Reputation Management** | 8.2 (12 reviews) | 8.4 (17 reviews) | | **Tracking & Reporting** | 9.1 (18 reviews) | 9.0 (20 reviews) | | **Enterprise Scalability** | 8.3 (10 reviews) | 8.9 (19 reviews) | | **Performance and Reliability** | 9.3 (20 reviews) | 9.4 (20 reviews) | ### Email Deliverability | Product | Score | Reviews | |---|---|---| | **ActiveCampaign Postmark** | N/A | N/A | | **Campaign Monitor** | 8.6/10 | 15 | #### Diagnosis | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **IP Address ** | Not enough data | 8.2 (13 reviews) | | **Domains** | Not enough data | 8.6 (13 reviews) | | **Content ** | Not enough data | 8.7 (13 reviews) | | **Policy Compliance** | Not enough data | 8.8 (13 reviews) | #### Tracking | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Processing Time** | Not enough data | 9.2 (13 reviews) | | **Placement ** | Not enough data | 8.5 (13 reviews) | | **Open Rate** | Not enough data | 9.1 (15 reviews) | | **Time to Open** | Not enough data | 8.5 (13 reviews) | | **Alerts** | Not enough data | 8.7 (13 reviews) | #### Reporting | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Campaign Performance** | Not enough data | 8.9 (15 reviews) | | **Domain Reputation** | Not enough data | 8.1 (12 reviews) | | **Brand Reputation** | Not enough data | 8.3 (13 reviews) | | **Blacklist and Whitelist** | Not enough data | 8.2 (13 reviews) | #### Agentic AI - Email Deliverability | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Autonomous Task Execution** | Not enough data | Not enough data | | **Cross-system Integration** | Not enough data | Not enough data | | **Adaptive Learning** | Not enough data | Not enough data | | **Proactive Assistance** | Not enough data | Not enough data | | **Decision Making** | Not enough data | Not enough data | ### Personalization Engines | Product | Score | Reviews | |---|---|---| | **ActiveCampaign Postmark** | N/A | N/A | | **Campaign Monitor** | N/A | N/A | #### Segmentation | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **A/B Testing** | Not enough data | Not enough data | | **Customer Profiles** | Not enough data | Not enough data | #### Targeting | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Behavioral Targeting** | Not enough data | Not enough data | | **Contextual Targeting** | Not enough data | Not enough data | #### Triggered Content | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Geofencing** | Not enough data | Not enough data | | **Triggered Emails** | Not enough data | Not enough data | | **Triggered Messages** | Not enough data | Not enough data | #### Personalized Content | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Recommendation Engine** | Not enough data | Not enough data | | **Personalized Discounts** | Not enough data | Not enough data | | **Website Personalization** | Not enough data | Not enough data | #### Agentic AI - Personalization Engines | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Autonomous Task Execution** | Not enough data | Not enough data | | **Cross-system Integration** | Not enough data | Not enough data | | **Adaptive Learning** | Not enough data | Not enough data | | **Natural Language Interaction** | Not enough data | Not enough data | | **Proactive Assistance** | Not enough data | Not enough data | | **Decision Making** | Not enough data | Not enough data | ### Email Template Builder | Product | Score | Reviews | |---|---|---| | **ActiveCampaign Postmark** | N/A | N/A | | **Campaign Monitor** | 8.6/10 | 156 | #### Templates | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Text and Themes** | Not enough data | 8.7 (143 reviews) ✓ Verified | | **Stock Images** | Not enough data | 7.9 (104 reviews) ✓ Verified | | **Proofing** | Not enough data | 8.7 (118 reviews) ✓ Verified | | **Mobile Responsive** | Not enough data | 9.1 (41 reviews) | #### Edit | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Pre-Made** | Not enough data | 8.5 (126 reviews) ✓ Verified | | **Build** | Not enough data | 8.8 (137 reviews) ✓ Verified | | **HTML** | Not enough data | 8.7 (121 reviews) ✓ Verified | #### Logistics | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Analytics** | Not enough data | 8.8 (136 reviews) ✓ Verified | | **Issues** | Not enough data | 8.3 (126 reviews) ✓ Verified | | **Integrations** | Not enough data | 8.5 (114 reviews) ✓ Verified | | **Shareable Link** | Not enough data | 8.7 (37 reviews) | #### Generative AI | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **AI Text Generation** | Not enough data | 8.6 (6 reviews) | | **AI Text Summarization** | Not enough data | Feature Not Available | #### Agentic AI - Email Template Builder | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Autonomous Task Execution** | Not enough data | Not enough data | | **Cross-system Integration** | Not enough data | Not enough data | ### SMS Marketing | Product | Score | Reviews | |---|---|---| | **ActiveCampaign Postmark** | N/A | N/A | | **Campaign Monitor** | N/A | N/A | #### Text Messaging | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Bulk SMS** | Not enough data | Not enough data | | **Two-Way Text Messaging** | Not enough data | Not enough data | | **Text Scheduler** | Not enough data | Not enough data | | **Automatic Replies** | Not enough data | Not enough data | | **Automatic URL Shortening** | Not enough data | Not enough data | | **MMS Marketing** | Not enough data | Not enough data | | **Personalization** | Not enough data | Not enough data | | **Transactional SMS** | Not enough data | Not enough data | #### SMS Platform | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Reporting** | Not enough data | Not enough data | | **Automation** | Not enough data | Not enough data | | **White Label** | Not enough data | Not enough data | | **Text-to-Landline** | Not enough data | Not enough data | | **Short Codes** | Not enough data | Not enough data | | **API Integration** | Not enough data | Not enough data | #### Agentic AI - SMS Marketing | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Autonomous Task Execution** | Not enough data | Not enough data | | **Multi-step Planning** | Not enough data | Not enough data | | **Cross-system Integration** | Not enough data | Not enough data | | **Natural Language Interaction** | Not enough data | Not enough data | | **Proactive Assistance** | Not enough data | Not enough data | | **Decision Making** | Not enough data | Not enough data | #### AI Automation - SMS Marketing | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **AI SMS** | Not enough data | Not enough data | #### AI Content Generation - SMS Marketing | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **AI SMS** | Not enough data | Not enough data | ### Email Testing | Product | Score | Reviews | |---|---|---| | **ActiveCampaign Postmark** | N/A | N/A | | **Campaign Monitor** | 8.7/10 | 6 | #### Platform Basics | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Editing Platform** | Not enough data | 9.2 (6 reviews) | | **Spam Filter Testing** | Not enough data | 7.2 (6 reviews) | | **A/B Testing** | Not enough data | 8.6 (6 reviews) | | **Deliverability Testing** | Not enough data | 8.1 (6 reviews) | | **Design Testing** | Not enough data | 8.3 (6 reviews) | #### Platform Data | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Performance** | Not enough data | 9.2 (6 reviews) | | **Dashboard** | Not enough data | 9.4 (6 reviews) | | **Analytics** | Not enough data | 9.4 (6 reviews) | #### Agentic AI - Email Testing | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Autonomous Task Execution** | Not enough data | Not enough data | | **Cross-system Integration** | Not enough data | Not enough data | | **Adaptive Learning** | Not enough data | Not enough data | | **Proactive Assistance** | Not enough data | Not enough data | | **Decision Making** | Not enough data | Not enough data | ### Landing Page Builders | Product | Score | Reviews | |---|---|---| | **ActiveCampaign Postmark** | N/A | N/A | | **Campaign Monitor** | N/A | N/A | #### Page Customization | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Drag and Drop** | Not enough data | Not enough data | | **Templates** | Not enough data | Not enough data | | **Advanced Customization** | Not enough data | Not enough data | | **Content Library** | Not enough data | Not enough data | #### Page Optimization | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **A/B Testing** | Not enough data | Not enough data | | **Mobile Responsive** | Not enough data | Not enough data | | **Web Analytics** | Not enough data | Not enough data | | **SEO** | Not enough data | Not enough data | #### Integrations | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **E-Commerce Integration** | Not enough data | Not enough data | | **Email Marketing Integration** | Not enough data | Not enough data | | **Domain Integration** | Not enough data | Not enough data | #### Generative AI | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **AI Text Generation** | Not enough data | Not enough data | #### Agentic AI - Landing Page Builders | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Cross-system Integration** | Not enough data | Feature Not Available | ### Personalization | Product | Score | Reviews | |---|---|---| | **ActiveCampaign Postmark** | N/A | N/A | | **Campaign Monitor** | N/A | N/A | #### Agentic AI - Personalization | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Autonomous Task Execution** | Not enough data | Not enough data | | **Cross-system Integration** | Not enough data | Not enough data | | **Adaptive Learning** | Not enough data | Not enough data | | **Natural Language Interaction** | Not enough data | Not enough data | | **Proactive Assistance** | Not enough data | Not enough data | | **Decision Making** | Not enough data | Not enough data | #### AI Personalization - Personalization | Feature | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Predictive Recommendations** | Not enough data | Not enough data | | **Audience Segmentation** | Not enough data | Not enough data | | **Adaptive Content** | Not enough data | Not enough data | --- ## Categories **Shared Categories (1):** [Transactional Email Software](https://www.g2.com/categories/transactional-email) **Unique to Campaign Monitor (8):** [Email Template Builder Software](https://www.g2.com/categories/email-template-builder), [Personalization Software](https://www.g2.com/categories/personalization), [Personalization Engines](https://www.g2.com/categories/personalization-engines), [Email Deliverability Tools](https://www.g2.com/categories/email-deliverability), [Email Marketing Software](https://www.g2.com/categories/email-marketing), [Landing Page Builders](https://www.g2.com/categories/landing-page-builders), [Email Testing Software](https://www.g2.com/categories/email-testing), [SMS Marketing Software](https://www.g2.com/categories/sms-marketing) --- ## Reviewer Demographics ### By Company Size | Segment | ActiveCampaign Postmark | Campaign Monitor | |---|---|---| | **Small-Business** | 62.5% | 54.0% | | **Mid-Market** | 37.5% | 32.5% | | **Enterprise** | 0% | 13.5% | ### By Industry #### ActiveCampaign Postmark - **Computer Software:** 34.4% - **Marketing and Advertising:** 9.4% - **Information Technology and Services:** 9.4% - **Transportation/Trucking/Railroad:** 6.3% - **Internet:** 6.3% - **Financial Services:** 6.3% - **Retail:** 3.1% - **Restaurants:** 3.1% - **Printing:** 3.1% - **Online Media:** 3.1% - **Other:** 15.6% #### Campaign Monitor - **Marketing and Advertising:** 20.6% - **Information Technology and Services:** 6.1% - **Computer Software:** 5.3% - **Internet:** 4.1% - **Non-Profit Organization Management:** 3.7% - **Retail:** 3.1% - **Real Estate:** 2.8% - **Higher Education:** 2.7% - **Health, Wellness and Fitness:** 2.3% - **Education Management:** 2.0% - **Other:** 47.2% --- ## Alternatives ### Alternatives to ActiveCampaign Postmark - [Brevo Marketing Platform](https://www.g2.com/products/brevo-marketing-platform/reviews) — 4.5/5 stars (2618 reviews) - [Twilio SendGrid Email API](https://www.g2.com/products/twilio-sendgrid-email-api/reviews) — 4.0/5 stars (368 reviews) - [Mailgun](https://www.g2.com/products/mailgun/reviews) — 4.2/5 stars (321 reviews) - [Amazon Simple Email Service (Amazon SES)](https://www.g2.com/products/amazon-simple-email-service-amazon-ses/reviews) — 4.3/5 stars (203 reviews) - [SMTP2GO](https://www.g2.com/products/smtp2go/reviews) — 4.7/5 stars (226 reviews) - [Mailjet](https://www.g2.com/products/mailjet/reviews) — 3.9/5 stars (176 reviews) - [Email API](https://www.g2.com/products/netcore-private-limited-email-api/reviews) — 4.4/5 stars (733 reviews) - [Elastic Email](https://www.g2.com/products/elastic-email/reviews) — 4.4/5 stars (212 reviews) - [Intuit Mailchimp Email Marketing](https://www.g2.com/products/intuit-mailchimp-email-marketing/reviews) — 4.3/5 stars (12982 reviews) - [SparkPost](https://www.g2.com/products/sparkpost/reviews) — 4.0/5 stars (73 reviews) ### Alternatives to Campaign Monitor - [Brevo Marketing Platform](https://www.g2.com/products/brevo-marketing-platform/reviews) — 4.5/5 stars (2618 reviews) - [Dotdigital](https://www.g2.com/products/dotdigital/reviews) — 4.4/5 stars (1235 reviews) - [Sailthru by Marigold](https://www.g2.com/products/sailthru-by-marigold/reviews) — 4.2/5 stars (155 reviews) - [GetResponse](https://www.g2.com/products/getresponse/reviews) — 4.3/5 stars (1139 reviews) - [ActiveCampaign](https://www.g2.com/products/activecampaign/reviews) — 4.4/5 stars (14772 reviews) - [Intuit Mailchimp Email Marketing](https://www.g2.com/products/intuit-mailchimp-email-marketing/reviews) — 4.3/5 stars (12982 reviews) - [Constant Contact](https://www.g2.com/products/constant-contact/reviews) — 4.1/5 stars (7418 reviews) - [Agentforce Marketing (formerly Salesforce Marketing Cloud)](https://www.g2.com/products/agentforce-marketing-formerly-salesforce-marketing-cloud/reviews) — 4.0/5 stars (4630 reviews) - [Klaviyo](https://www.g2.com/products/klaviyo/reviews) — 4.6/5 stars (1359 reviews) - [AWeber](https://www.g2.com/products/aweber/reviews) — 4.2/5 stars (649 reviews) --- ## Top Discussions ### ActiveCampaign Postmark No discussions available for this product. ### Campaign Monitor - Title: [What is Campaign Monitor used for?](https://www.g2.com/discussions/what-is-campaign-monitor-used-for) — 1 comment > **Top comment:** "**Campaign Monitor** is an email marketing platform that is used to create, send, and optimize email campaigns. It provides tools and features that allow..." - Title: [Is Campaign Monitor good?](https://www.g2.com/discussions/is-campaign-monitor-good) — 1 comment > **Top comment:** "Yes it is! I've tried and used several different email marketing programs and this is one of the best so far." - Title: [What payment types are accepted?](https://www.g2.com/discussions/accepted-payment-types) — 1 comment, 1 upvote > **Top comment:** "You can use PayPal Or all major Credit Cards. The PayPal option is a little confusing for some people, but you can turn it off and resend an invoice if..." --- **Source:** [G2.com](https://www.g2.com) | [Comparison Page](https://www.g2.com/compare/activecampaign-postmark-vs-campaign-monitor)