# Constant Contact vs Customer.io Comparison
---
## AI Generated Summary
- **G2 reviewers report** that Constant Contact excels in **ease of setup** , with users appreciating the intuitive onboarding process that allows them to quickly create and schedule email campaigns. One user noted, "I like how it is easy to setup email campaigns and schedule them to be sent."
- **Users say** that Customer.io offers a strong **user experience** , particularly with its navigation and data flow. Reviewers highlighted that the platform is straightforward to understand, making it easier to manage complex features like automation and AI.
- **According to verified reviews** , Constant Contact stands out for its **reliable delivery** of emails, with users noting that newsletters maintain visual consistency across recipients. This reliability is crucial for businesses and nonprofits looking to communicate effectively.
- **Reviewers mention** that Customer.io's focus on **automation** and AI features adds significant value, with one user praising the platform's fast release cycles and innovative approach, which helps avoid pushing customers into enterprise sales funnels.
- **G2 reviewers highlight** that Constant Contact provides excellent **analytics** capabilities, allowing users to track open rates and engagement effectively. This feature is particularly beneficial for businesses looking to optimize their email marketing strategies.
- **Users report** that while Customer.io has a strong focus on **personalization** , Constant Contact also offers robust options in this area, with users appreciating the ability to tailor messages to their audience effectively. One user noted the platform's clean application for creating personalized newsletters.



| | Constant Contact | Customer.io | 
|---|---|---|
| **Star Rating** | 4.1 out of 5 | 4.4 out of 5 | 
| **Total Reviews** | 7,388 | 827 | 
| **Largest Market Segment** | Small-Business (70.5% of reviews) | Small-Business (58.7% of reviews) | 
| **Entry Level Price** | Starting at $12.00 Per Month | Starting at $100.00 Per Month | 

---
## Top Pros & Cons

### Constant Contact

Pros:
- Ease of Use (1059 reviews)
- Easy Creation (495 reviews)

Cons:
- Missing Features (286 reviews)
- Limited Customization (255 reviews)

### Customer.io

Pros:
- Ease of Use (250 reviews)
- Automation (158 reviews)

Cons:
- Learning Curve (98 reviews)
- Missing Features (83 reviews)

---
## Ratings Comparison
| Rating | Constant Contact | Customer.io | 
|---|---|---|
  | **Meets Requirements** | 8.4 (6364 reviews) | 8.7 (666 reviews) | 
  | **Ease of Use** | 8.5 (6404 reviews) | 8.3 (688 reviews) | 
  | **Ease of Setup** | 8.6 (3563 reviews) | 8.0 (479 reviews) | 
  | **Ease of Admin** | 8.6 (3115 reviews) | 8.6 (278 reviews) | 
  | **Quality of Support** | 8.3 (5210 reviews) | 8.6 (594 reviews) | 
  | **Has the product been a good partner in doing business?** | 8.6 (2988 reviews) | 9.0 (277 reviews) | 
  | **Product Direction (% positive)** | 7.1 (6252 reviews) | 9.1 (660 reviews) | 

---
## Pricing

### Constant Contact

#### Entry-Level Pricing

Plan: Lite

Price: Starting at $12.00 Per Month

Description: Start marketing today with a simple suite of email, social, and event management tools, all backed by marketing experts and legendary support.

Key Features:
- Basic email marketing with easy-to-use templates.
- Automated Welcome Email for new contacts
- Social Marketing

[Browse all 3 editions](https://www.g2.com/products/constant-contact/pricing)

#### Free Trial

Yes

### Customer.io

#### Entry-Level Pricing

Plan: Essentials

Price: Starting at $100.00 Per Month

Description: For small companies who are gaining momentum.

Key Features:
- Send emails, push, in-app, SMS, webhooks
-  Track custom events and attributes
- Visual workflow builder

[Browse all 3 editions](https://www.g2.com/products/customer-io/pricing)

#### Free Trial

Yes

---
## Features Comparison By Category

### Email Marketing

| Product | Score | Reviews |
|---|---|---|
| **Constant Contact** | 7.7/10 | 5388 |
| **Customer.io** | N/A | N/A |

#### Email Marketing

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Email and Mobile Preview** | 8.6 (4935 reviews) ✓ Verified | Not enough data | 
| **Manage Email Lists** | 8.5 (5065 reviews) ✓ Verified | Not enough data | 
| **High-Volume Sending** | 8.9 (4746 reviews) ✓ Verified | Not enough data | 
| **Building and Personalizing Emails** | 8.3 (5031 reviews) ✓ Verified | Not enough data | 
| **Sending Outbound Emails** | 8.9 (5028 reviews) ✓ Verified | Not enough data | 
| **Manage Email Deliverability** | 8.5 (4862 reviews) ✓ Verified | Not enough data | 
| **Automated Email Responses** | 8.3 (3945 reviews) ✓ Verified | Not enough data | 
| **Multi-user Account** | 8.4 (1785 reviews) ✓ Verified | Not enough data | 
| **Surveys** | 7.9 (1610 reviews) ✓ Verified | Not enough data | 

#### Reporting & Analytics

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **A/B Testing** | 7.9 (2389 reviews) ✓ Verified | Not enough data | 
| **Basic Reporting** | 8.4 (4596 reviews) ✓ Verified | Not enough data | 

#### Generative AI

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **AI Text Generation** | 7.1 (522 reviews) | Not enough data | 
| **AI Text Summarization** | 7.0 (519 reviews) | Not enough data | 

#### Agentic AI - Email Marketing

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Autonomous Task Execution** | 6.5 (369 reviews) | Not enough data | 
| **Autonomous Task Execution** | 6.6 (366 reviews) | Not enough data | 
| **Multi-step Planning** | 6.8 (365 reviews) | Not enough data | 
| **Cross-system Integration** | 6.7 (363 reviews) | Not enough data | 
| **Cross-system Integration** | 6.7 (362 reviews) | Not enough data | 

#### Integration

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Data Import & Export Tools** | 8.2 (2732 reviews) ✓ Verified | Not enough data | 
| **Integration APIs** | 7.5 (1958 reviews) ✓ Verified | Not enough data | 
| **Breadth of Partner Applications** | 7.5 (1938 reviews) ✓ Verified | Not enough data | 
| **CRM Integration** | 7.3 (1371 reviews) ✓ Verified | Not enough data | 
| **Social Media Integration** | 7.8 (1524 reviews) ✓ Verified | Not enough data | 
| **E-Commerce Integration** | 7.2 (1290 reviews) ✓ Verified | Not enough data | 

### Marketing Automation

| Product | Score | Reviews |
|---|---|---|
| **Constant Contact** | N/A | N/A |
| **Customer.io** | 7.5/10 | 530 |

#### Email Marketing

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Building and Personalizing Emails** | Not enough data | 8.8 (450 reviews) ✓ Verified | 
| **Sending Outbound Emails** | Not enough data | 8.8 (426 reviews) ✓ Verified | 
| **Manage Email Deliverability** | Not enough data | 8.4 (395 reviews) ✓ Verified | 
| **Automated Email Responses** | Not enough data | 8.4 (389 reviews) ✓ Verified | 

#### Online Marketing

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Landing Pages and Forms** | Not enough data | 6.3 (331 reviews) | 
| **Dynamic Content** | Not enough data | 8.0 (360 reviews) ✓ Verified | 
| **A/B Testing** | Not enough data | 8.3 (385 reviews) ✓ Verified | 
| **Mobile Optimized** | Not enough data | 7.9 (361 reviews) ✓ Verified | 
| **Search Tracking and Optimization** | Not enough data | Feature Not Available | 

#### Lead Management

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Marketing Lead Database** | Not enough data | 7.4 (336 reviews) ✓ Verified | 
| **Data Quality Management** | Not enough data | 7.6 (330 reviews) | 
| **Segmentation** | Not enough data | 8.6 (404 reviews) ✓ Verified | 
| **Lead Scoring and Grading** | Not enough data | 6.8 (310 reviews) | 
| **Lead Nurturing** | Not enough data | 7.7 (337 reviews) ✓ Verified | 
| **Online Behavior Tracking** | Not enough data | 7.3 (334 reviews) ✓ Verified | 
| **Automated Alerts and Tasks** | Not enough data | 7.3 (315 reviews) | 
| **CRM Lead Integration** | Not enough data | 7.3 (323 reviews) ✓ Verified | 

#### Campaign Management

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Program Management** | Not enough data | 7.7 (344 reviews) | 
| **Event / Webinar Marketing** | Not enough data | 7.0 (320 reviews) | 
| **Calendaring** | Not enough data | Feature Not Available | 
| **Budgeting** | Not enough data | Feature Not Available | 

#### Social

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Social Listening** | Not enough data | Feature Not Available | 
| **Social Sharing** | Not enough data | 6.6 (306 reviews) | 
| **Social Campaigns** | Not enough data | Feature Not Available | 
| **Social Media Engagement** | Not enough data | Feature Not Available | 
| **Social Media Advertising** | Not enough data | Feature Not Available | 

#### Reporting & Analytics

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Basic Reporting** | Not enough data | 7.8 (391 reviews) ✓ Verified | 
| **Web Analytics** | Not enough data | 6.9 (332 reviews) ✓ Verified | 
| **ROI Analytics** | Not enough data | 6.5 (321 reviews) | 
| **Revenue Analytics** | Not enough data | 6.3 (310 reviews) | 
| **SEO / Keyword Analytics** | Not enough data | Feature Not Available | 

#### Platform

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Customization ** | Not enough data | 8.3 (379 reviews) ✓ Verified | 
| **Workflow Capability** | Not enough data | 8.5 (395 reviews) ✓ Verified | 
| **User, Role, and Access Management** | Not enough data | 8.5 (358 reviews) ✓ Verified | 
| **Internationalization** | Not enough data | 7.7 (332 reviews) ✓ Verified | 
| **Sandbox / Test Environments** | Not enough data | 7.7 (348 reviews) ✓ Verified | 
| **Performance and Reliability** | Not enough data | 8.7 (378 reviews) ✓ Verified | 
| **Output Document Generation** | Not enough data | 7.2 (313 reviews) ✓ Verified | 

#### Agentic AI - Marketing Automation

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Autonomous Task Execution** | Not enough data | 6.3 (69 reviews) | 
| **Multi-step Planning** | Not enough data | 6.5 (69 reviews) | 
| **Cross-system Integration** | Not enough data | 6.8 (63 reviews) | 
| **Adaptive Learning** | Not enough data | 6.4 (65 reviews) | 
| **Proactive Assistance** | Not enough data | 6.3 (66 reviews) | 
| **Decision Making** | Not enough data | 6.3 (67 reviews) | 

#### Integration

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Data Import & Export Tools** | Not enough data | 8.3 (377 reviews) ✓ Verified | 
| **Integration APIs** | Not enough data | 8.3 (386 reviews) ✓ Verified | 
| **Breadth of Partner Applications** | Not enough data | 7.6 (344 reviews) ✓ Verified | 

### Transactional Email

| Product | Score | Reviews |
|---|---|---|
| **Constant Contact** | N/A | N/A |
| **Customer.io** | 8.1/10 | 286 |

#### Administration

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Template Creation** | Not enough data | 8.1 (267 reviews) | 
| **Preset Template Availability** | Not enough data | 7.4 (235 reviews) | 
| **Custom Unsubscribe** | Not enough data | 8.1 (252 reviews) | 
| **Email Segmentation** | Not enough data | 8.9 (267 reviews) | 
| **Detailed Server Logs** | Not enough data | 7.7 (237 reviews) | 
| **Notifications** | Not enough data | 7.8 (243 reviews) | 

#### Integrations

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Webhooks** | Not enough data | 8.6 (237 reviews) | 
| **Event Tracking API** | Not enough data | 8.5 (240 reviews) | 
| **Mail Send API** | Not enough data | 8.4 (205 reviews) | 
| **Spam Filter Testing** | Not enough data | 7.2 (178 reviews) | 

#### Platform

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Custom Tracking Domain** | Not enough data | 8.2 (210 reviews) | 
| **Multiple Domains** | Not enough data | 8.2 (205 reviews) | 
| **Dedicated IP** | Not enough data | 7.9 (200 reviews) | 
| **Documentation** | Not enough data | 8.2 (240 reviews) ✓ Verified | 
| **Sender Reputation Management** | Not enough data | 7.8 (218 reviews) | 
| **Tracking & Reporting** | Not enough data | 8.2 (243 reviews) | 
| **Enterprise Scalability** | Not enough data | 7.9 (216 reviews) | 
| **Performance and Reliability** | Not enough data | 8.8 (240 reviews) | 

### Email Deliverability

| Product | Score | Reviews |
|---|---|---|
| **Constant Contact** | 7.6/10 | 1187 |
| **Customer.io** | N/A | N/A |

#### Diagnosis

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **IP Address ** | 7.9 (768 reviews) | Not enough data | 
| **Domains** | 8.1 (763 reviews) | Not enough data | 
| **Content ** | 8.5 (948 reviews) | Not enough data | 
| **Policy Compliance** | 8.4 (851 reviews) | Not enough data | 

#### Tracking

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Processing Time** | Feature Not Available | Not enough data | 
| **Placement ** | Feature Not Available | Not enough data | 
| **Open Rate** | 8.8 (1088 reviews) | Not enough data | 
| **Time to Open** | Feature Not Available | Not enough data | 
| **Alerts** | 8.5 (924 reviews) | Not enough data | 

#### Reporting

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Campaign Performance** | 8.8 (1068 reviews) | Not enough data | 
| **Domain Reputation** | Feature Not Available | Not enough data | 
| **Brand Reputation** | Feature Not Available | Not enough data | 
| **Blacklist and Whitelist** | 8.0 (829 reviews) | Not enough data | 

#### Agentic AI - Email Deliverability

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Autonomous Task Execution** | 6.4 (117 reviews) | Not enough data | 
| **Cross-system Integration** | 6.2 (117 reviews) | Not enough data | 
| **Adaptive Learning** | 6.4 (114 reviews) | Not enough data | 
| **Proactive Assistance** | 6.5 (114 reviews) | Not enough data | 
| **Decision Making** | 6.4 (114 reviews) | Not enough data | 

### Push Notification

| Product | Score | Reviews |
|---|---|---|
| **Constant Contact** | N/A | N/A |
| **Customer.io** | 8.1/10 | 124 |

#### Campaigns

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Customize** | Not enough data | 8.6 (114 reviews) | 
| **Scheduling** | Not enough data | 8.7 (111 reviews) | 
| **Retarget** | Not enough data | 8.3 (106 reviews) | 
| **Segmentation** | Not enough data | 8.8 (119 reviews) | 
| **Triggered Notifications** | Not enough data | 8.8 (113 reviews) | 

#### Analytics

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Campaign Performance** | Not enough data | 8.3 (115 reviews) | 
| **Audience Insights** | Not enough data | 7.6 (105 reviews) | 

#### Optimization

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **A/B Testing** | Not enough data | 8.5 (111 reviews) | 
| **Personalization** | Not enough data | 8.8 (113 reviews) | 
| **Rich Notifications** | Not enough data | 8.0 (109 reviews) | 
| **Integrations** | Not enough data | 8.5 (112 reviews) | 

#### Agentic AI - Push Notification

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Autonomous Task Execution** | Not enough data | 6.4 (14 reviews) | 
| **Adaptive Learning** | Not enough data | 6.9 (14 reviews) | 
| **Proactive Assistance** | Not enough data | 6.5 (14 reviews) | 

### AI Writing Assistant

| Product | Score | Reviews |
|---|---|---|
| **Constant Contact** | 8.3/10 | 87 |
| **Customer.io** | N/A | N/A |

#### Grammar

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Grammar Check** | 8.5 (77 reviews) | Not enough data | 
| **Tone Check** | 8.3 (70 reviews) | Not enough data | 
| **Sentence Formatting** | 8.5 (72 reviews) | Not enough data | 

#### Formatting

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Plagiarism Check** | 8.2 (66 reviews) | Not enough data | 
| **Style Editor** | 8.1 (70 reviews) | Not enough data | 
| **Citation Finder** | 7.7 (66 reviews) | Not enough data | 

#### Content 

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Idea Recommendation** | 8.1 (68 reviews) | Not enough data | 
| **Content Generation** | 8.3 (71 reviews) | Not enough data | 
| **Form Generation** | 8.2 (67 reviews) | Not enough data | 

#### Product Type

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Standalone Application** | 8.7 (69 reviews) | Not enough data | 
| **Plugin** | 7.9 (65 reviews) | Not enough data | 

#### Generative AI

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **AI Text Generation** | 8.5 (24 reviews) | Not enough data | 
| **AI Text Summarization** | 8.7 (24 reviews) | Not enough data | 

### Email Template Builder

| Product | Score | Reviews |
|---|---|---|
| **Constant Contact** | 7.8/10 | 1177 |
| **Customer.io** | N/A | N/A |

#### Templates

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Text and Themes** | 8.1 (1059 reviews) ✓ Verified | Not enough data | 
| **Stock Images** | 7.2 (917 reviews) ✓ Verified | Not enough data | 
| **Proofing** | 7.9 (971 reviews) ✓ Verified | Not enough data | 
| **Mobile Responsive** | 8.3 (592 reviews) | Not enough data | 

#### Edit

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Pre-Made** | 8.2 (955 reviews) ✓ Verified | Not enough data | 
| **Build** | 8.4 (1046 reviews) ✓ Verified | Not enough data | 
| **HTML** | 7.9 (843 reviews) ✓ Verified | Not enough data | 

#### Logistics

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Analytics** | 8.6 (1030 reviews) ✓ Verified | Not enough data | 
| **Issues** | 7.7 (877 reviews) ✓ Verified | Not enough data | 
| **Integrations** | 7.9 (811 reviews) ✓ Verified | Not enough data | 
| **Shareable Link** | 8.8 (603 reviews) | Not enough data | 

#### Generative AI

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **AI Text Generation** | 7.3 (158 reviews) | Not enough data | 
| **AI Text Summarization** | 7.3 (154 reviews) | Not enough data | 

#### Agentic AI - Email Template Builder

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Autonomous Task Execution** | 6.9 (94 reviews) | Not enough data | 
| **Cross-system Integration** | 6.8 (93 reviews) | Not enough data | 

### Event Marketing

| Product | Score | Reviews |
|---|---|---|
| **Constant Contact** | 7.5/10 | 845 |
| **Customer.io** | N/A | N/A |

#### Marketing and Communications

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Lead generation and retrieval** | 8.2 (598 reviews) | Not enough data | 
| **Social media promotion** | 8.1 (625 reviews) | Not enough data | 
| **Event website creation** | 7.9 (559 reviews) | Not enough data | 
| **Email customization** | 8.7 (760 reviews) | Not enough data | 
| **Contact list management** | 8.9 (774 reviews) | Not enough data | 

#### Attendee Engagement

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Social media integrations** | 8.0 (619 reviews) | Not enough data | 
| **Attendee networking** | 7.8 (551 reviews) | Not enough data | 
| **Attendee surveys-attendee engagement** | 7.9 (560 reviews) | Not enough data | 

#### Registration

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Event creation** | 8.1 (615 reviews) | Not enough data | 
| **User registration process** | 8.1 (603 reviews) | Not enough data | 
| **Mobile check-in** | 7.7 (490 reviews) | Not enough data | 

#### Generative AI

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **AI Text Generation** | 7.2 (137 reviews) | Not enough data | 

#### Agentic AI - Event Marketing

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Autonomous Task Execution** | 6.5 (104 reviews) | Not enough data | 
| **Multi-step Planning** | 6.5 (105 reviews) | Not enough data | 
| **Cross-system Integration** | 6.5 (106 reviews) | Not enough data | 
| **Adaptive Learning** | 6.5 (106 reviews) | Not enough data | 
| **Proactive Assistance** | 6.5 (106 reviews) | Not enough data | 
| **Decision Making** | 6.6 (109 reviews) | Not enough data | 

### SMS Marketing

| Product | Score | Reviews |
|---|---|---|
| **Constant Contact** | 7.8/10 | 88 |
| **Customer.io** | 7.4/10 | 95 |

#### Text Messaging

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Bulk SMS** | 8.6 (73 reviews) | 8.5 (85 reviews) | 
| **Two-Way Text Messaging** | 7.8 (64 reviews) | Feature Not Available | 
| **Text Scheduler** | 8.4 (68 reviews) | 8.3 (79 reviews) | 
| **Automatic Replies** | 8.4 (70 reviews) | Feature Not Available | 
| **Automatic URL Shortening** | 8.4 (67 reviews) | 6.8 (74 reviews) | 
| **MMS Marketing** | 8.1 (67 reviews) | 6.5 (76 reviews) | 
| **Personalization** | 8.5 (74 reviews) | 8.7 (86 reviews) | 
| **Transactional SMS** | 7.8 (64 reviews) | 8.2 (78 reviews) | 

#### SMS Platform

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Reporting** | 8.7 (75 reviews) | 7.5 (81 reviews) | 
| **Automation** | 8.8 (69 reviews) | 8.3 (84 reviews) | 
| **White Label** | 7.7 (66 reviews) | 7.2 (72 reviews) | 
| **Text-to-Landline** | 6.7 (62 reviews) | 6.2 (70 reviews) | 
| **Short Codes** | 7.2 (62 reviews) | 6.7 (70 reviews) | 
| **API Integration** | 7.4 (63 reviews) | 8.3 (82 reviews) | 

#### Agentic AI - SMS Marketing

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Autonomous Task Execution** | 6.4 (12 reviews) | 6.4 (17 reviews) | 
| **Multi-step Planning** | 7.5 (12 reviews) | 6.4 (17 reviews) | 
| **Cross-system Integration** | 6.8 (12 reviews) | 7.5 (17 reviews) | 
| **Natural Language Interaction** | 7.4 (12 reviews) | 7.2 (17 reviews) | 
| **Proactive Assistance** | 7.1 (12 reviews) | 7.0 (17 reviews) | 
| **Decision Making** | 7.2 (12 reviews) | 6.7 (18 reviews) | 

### Customer Data Platform (CDP)

| Product | Score | Reviews |
|---|---|---|
| **Constant Contact** | N/A | N/A |
| **Customer.io** | 7.1/10 | 101 |

#### Data Sourcing

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Data Enrichment** | Not enough data | 7.5 (91 reviews) | 
| **Expandability** | Not enough data | 7.7 (93 reviews) | 
| **Content Marketing** | Not enough data | 7.3 (95 reviews) | 
| **Multiple Devices** | Not enough data | 8.2 (93 reviews) | 

#### Intelligence

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Marketing Metrics** | Not enough data | 7.3 (89 reviews) | 
| **Predictive Modeling** | Not enough data | 5.8 (87 reviews) | 
| **Recommendation Engine** | Not enough data | 5.8 (85 reviews) | 

### Social Media Management

| Product | Score | Reviews |
|---|---|---|
| **Constant Contact** | 7.9/10 | 220 |
| **Customer.io** | N/A | N/A |

#### Content & Collaboration

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Content Calendar** | 8.8 (179 reviews) | Not enough data | 
| **Content Library** | 8.7 (185 reviews) | Not enough data | 
| **Shared Inbox** | 8.3 (161 reviews) | Not enough data | 
| **Approval Workflows** | Feature Not Available | Not enough data | 
| **Users and Permissions** | Feature Not Available | Not enough data | 
| **Content Creation** | 8.7 (182 reviews) | Not enough data | 

#### Social Management

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Social Analytics** | 8.6 (201 reviews) | Not enough data | 
| **Social Publishing** | 8.8 (204 reviews) | Not enough data | 
| **Campaign Optimization** | Feature Not Available | Not enough data | 
| **Social Engagement** | 8.7 (196 reviews) | Not enough data | 
| **Social Ads** | 8.1 (183 reviews) | Not enough data | 
| **Campaign Planning** | 8.8 (187 reviews) | Not enough data | 
| **Hashtag Capabilites** | 8.4 (148 reviews) | Not enough data | 

#### Agentic AI - Social Media Management

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Autonomous Task Execution** | 6.8 (59 reviews) | Not enough data | 
| **Multi-step Planning** | 6.9 (59 reviews) | Not enough data | 
| **Cross-system Integration** | 6.8 (58 reviews) | Not enough data | 
| **Adaptive Learning** | 7.0 (58 reviews) | Not enough data | 
| **Natural Language Interaction** | 7.0 (57 reviews) | Not enough data | 
| **Proactive Assistance** | 6.9 (56 reviews) | Not enough data | 
| **Decision Making** | 6.8 (56 reviews) | Not enough data | 

### Social Media Advertising

| Product | Score | Reviews |
|---|---|---|
| **Constant Contact** | 8.3/10 | 347 |
| **Customer.io** | N/A | N/A |

#### Platform Interoperability

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Close Ecosystem API** | Feature Not Available | Not enough data | 

#### Agentic AI - Social Media Advertising

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Autonomous Task Execution** | 6.6 (38 reviews) | Not enough data | 
| **Multi-step Planning** | 6.8 (38 reviews) | Not enough data | 
| **Cross-system Integration** | 6.6 (38 reviews) | Not enough data | 
| **Adaptive Learning** | 7.3 (39 reviews) | Not enough data | 
| **Proactive Assistance** | 7.3 (37 reviews) | Not enough data | 
| **Decision Making** | 7.3 (37 reviews) | Not enough data | 

#### Social Functionality

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Social Functionality** | 8.8 (300 reviews) | Not enough data | 

#### Campaign Management

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Campaign Dashboard** | 9.0 (307 reviews) | Not enough data | 
| **Campaign Optimization** | 8.9 (290 reviews) | Not enough data | 
| **Reach** | 8.9 (286 reviews) | Not enough data | 
| **Bulk Editing** | 8.4 (246 reviews) | Not enough data | 
| **Batch Uploading** | 8.6 (250 reviews) | Not enough data | 
| **Brand Safety** | 8.9 (253 reviews) | Not enough data | 
| **Fraud Protection** | 9.0 (240 reviews) | Not enough data | 
| **Frequency Capping** | 8.4 (221 reviews) | Not enough data | 
| **Budget Pacing** | 8.4 (232 reviews) | Not enough data | 
| **Creative Optimization** | 8.7 (256 reviews) | Not enough data | 
| **Rich Media Capabilties** | 8.3 (243 reviews) | Not enough data | 
| **In-App Ads** | 8.0 (210 reviews) | Not enough data | 
| **Mobile Rich Media Capabilities** | 8.3 (223 reviews) | Not enough data | 

#### Targeting

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Targeting** | 8.8 (270 reviews) | Not enough data | 
| **Retargeting** | 8.7 (252 reviews) | Not enough data | 
| **Geo-Targeting** | 8.2 (221 reviews) | Not enough data | 
| **Contextual Targeting** | 8.5 (223 reviews) | Not enough data | 

#### Platform

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **API / Integrations** | 8.2 (231 reviews) | Not enough data | 
| **Custom Reports** | 8.5 (265 reviews) | Not enough data | 
| **User, Role, and Access Management** | 8.7 (273 reviews) | Not enough data | 
| **Performance and Reliability** | 9.0 (302 reviews) | Not enough data | 
| **Enterprise Scalability** | 8.5 (242 reviews) | Not enough data | 
| **Customization** | 8.6 (295 reviews) | Not enough data | 
| **Workflow Capability** | 8.7 (256 reviews) | Not enough data | 
| **Internationalization** | 8.4 (227 reviews) | Not enough data | 
| **Notifications** | 8.7 (276 reviews) | Not enough data | 

### Survey

| Product | Score | Reviews |
|---|---|---|
| **Constant Contact** | 8.0/10 | 294 |
| **Customer.io** | N/A | N/A |

#### Survey Management

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Survey Builder** | 8.3 (265 reviews) | Not enough data | 
| **Question Types** | 8.4 (254 reviews) | Not enough data | 
| **Templates** | Feature Not Available | Not enough data | 
| **Survey Distribution** | 8.6 (252 reviews) | Not enough data | 

#### Survey Customization

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Branching/Skip Logic** | Feature Not Available | Not enough data | 
| **Branding** | 8.5 (250 reviews) | Not enough data | 
| **Multimedia Support** | 8.2 (234 reviews) | Not enough data | 
| **Multilingual Surveys** | Feature Not Available | Not enough data | 

#### Survey Insights

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Reporting & Analytics** | 8.5 (262 reviews) | Not enough data | 
| **BI Tools Integration** | Feature Not Available | Not enough data | 
| **Data Exporting** | 8.6 (251 reviews) | Not enough data | 
| **Permissions** | Feature Not Available | Not enough data | 

#### Agentic AI - Survey

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Adaptive Learning** | 6.9 (50 reviews) | Not enough data | 
| **Proactive Assistance** | 6.7 (50 reviews) | Not enough data | 
| **Decision Making** | 6.9 (50 reviews) | Not enough data | 

### Personalization

| Product | Score | Reviews |
|---|---|---|
| **Constant Contact** | N/A | N/A |
| **Customer.io** | 5.7/10 | 35 |

#### Agentic AI - Personalization

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Autonomous Task Execution** | Not enough data | 5.5 (33 reviews) | 
| **Cross-system Integration** | Not enough data | 6.3 (33 reviews) | 
| **Adaptive Learning** | Not enough data | 5.7 (32 reviews) | 
| **Natural Language Interaction** | Not enough data | 5.7 (32 reviews) | 
| **Proactive Assistance** | Not enough data | 5.4 (32 reviews) | 
| **Decision Making** | Not enough data | 5.5 (33 reviews) | 

### Mobile Marketing

| Product | Score | Reviews |
|---|---|---|
| **Constant Contact** | N/A | N/A |
| **Customer.io** | 7.4/10 | 78 |

#### Analysis

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Application Attribution** | Not enough data | Feature Not Available | 
| **Campaign Analysis** | Not enough data | 8.0 (68 reviews) | 
| **Uninstall Tracking** | Not enough data | 6.2 (55 reviews) | 
| **Custom Dashboards** | Not enough data | Feature Not Available | 

#### Campaigns

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Proximity Marketing** | Not enough data | 7.3 (56 reviews) | 
| **Push Notifications** | Not enough data | 8.0 (62 reviews) | 
| **Bulk SMS** | Not enough data | 7.4 (62 reviews) | 
| **Two-Way Text Messaging** | Not enough data | Feature Not Available | 
| **Email Campaigns** | Not enough data | 9.3 (69 reviews) | 
| **Audience Segmentation** | Not enough data | 9.2 (70 reviews) | 

#### Engagement

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Coupons and Promotions** | Not enough data | 6.9 (53 reviews) | 

#### Platform

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Optimization** | Not enough data | 8.0 (61 reviews) | 
| **Integrations - Mobile Marketing** | Not enough data | Feature Not Available | 
| **Internationalization** | Not enough data | 7.6 (59 reviews) | 

#### Agentic AI - Mobile Marketing

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Autonomous Task Execution** | Not enough data | 6.7 (6 reviews) | 
| **Multi-step Planning** | Not enough data | 7.2 (6 reviews) | 
| **Cross-system Integration** | Not enough data | 6.1 (6 reviews) | 
| **Adaptive Learning** | Not enough data | 6.7 (6 reviews) | 
| **Proactive Assistance** | Not enough data | 6.4 (6 reviews) | 
| **Decision Making** | Not enough data | 6.9 (6 reviews) | 

### Website Builder

| Product | Score | Reviews |
|---|---|---|
| **Constant Contact** | 9.2/10 | 53 |
| **Customer.io** | N/A | N/A |

#### Customizations

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Templates** | Feature Not Available | Not enough data | 
| **Drag and Drop** | Feature Not Available | Not enough data | 
| **HTML Input** | Feature Not Available | Not enough data | 
| **Domain Name** | Feature Not Available | Not enough data | 

#### Growth

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **SEO** | Feature Not Available | Not enough data | 
| **Site Analytics** | Feature Not Available | Not enough data | 
| **Marketing Tools** | Feature Not Available | Not enough data | 
| **E-Commerce** | Feature Not Available | Not enough data | 
| **Hosting** | Feature Not Available | Not enough data | 

#### Content

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Email Integrations** | Feature Not Available | Not enough data | 
| **Content Management** | Feature Not Available | Not enough data | 
| **Permissions** | Feature Not Available | Not enough data | 
| **WordPress Tool** | Feature Not Available | Not enough data | 

#### Support

| Feature | Constant Contact | Customer.io | 
|---|---|---|
| **Customer Support** | 9.2 (45 reviews) | Not enough data | 

---
## Categories
**Shared Categories (1):** [SMS Marketing Software](https://www.g2.com/categories/sms-marketing)

**Unique to Constant Contact (9):** [Event Marketing Software](https://www.g2.com/categories/event-marketing), [Email Template Builder Software](https://www.g2.com/categories/email-template-builder), [AI Writing Assistants](https://www.g2.com/categories/ai-writing-assistant), [Email Deliverability Tools](https://www.g2.com/categories/email-deliverability), [Website Builder Software](https://www.g2.com/categories/website-builder), [Social Media Advertising Software](https://www.g2.com/categories/social-media-advertising), [Social Media Management Tools](https://www.g2.com/categories/social-media-mgmt), [Email Marketing Software](https://www.g2.com/categories/email-marketing), [Survey Software](https://www.g2.com/categories/survey)

**Unique to Customer.io (6):** [Personalization Software](https://www.g2.com/categories/personalization), [Push Notification Software](https://www.g2.com/categories/push-notification), [Transactional Email Software](https://www.g2.com/categories/transactional-email), [Mobile Marketing Software](https://www.g2.com/categories/mobile-marketing), [Marketing Automation Software](https://www.g2.com/categories/marketing-automation), [Customer Data Platforms (CDP)](https://www.g2.com/categories/customer-data-platform-cdp)


---
## Reviewer Demographics

### By Company Size

| Segment | Constant Contact | Customer.io | 
|---|---|---|
| **Small-Business** | 70.5% | 58.7% | 
| **Mid-Market** | 22.9% | 37.9% | 
| **Enterprise** | 6.6% | 3.4% | 

### By Industry

#### Constant Contact

- **Non-Profit Organization Management:** 12.5%
- **Marketing and Advertising:** 9.6%
- **Real Estate:** 4.4%
- **Education Management:** 4.0%
- **Religious Institutions:** 3.4%
- **Health, Wellness and Fitness:** 3.3%
- **Hospital & Health Care:** 2.9%
- **Retail:** 2.8%
- **Higher Education:** 2.7%
- **Information Technology and Services:** 2.3%
- **Other:** 52.1%

#### Customer.io

- **Computer Software:** 14.8%
- **Financial Services:** 13.4%
- **Information Technology and Services:** 9.0%
- **Marketing and Advertising:** 8.2%
- **Health, Wellness and Fitness:** 5.2%
- **Hospital & Health Care:** 2.5%
- **Internet:** 2.4%
- **Gambling & Casinos:** 2.4%
- **Consumer Services:** 2.4%
- **Insurance:** 2.1%
- **Other:** 37.6%

---
## Alternatives

### Alternatives to Constant Contact

- [Brevo Marketing Platform](https://www.g2.com/products/brevo-marketing-platform/reviews) — 4.5/5 stars (2561 reviews)
- [ActiveCampaign](https://www.g2.com/products/activecampaign/reviews) — 4.4/5 stars (14682 reviews)
- [Intuit Mailchimp All-in-One Marketing Platform](https://www.g2.com/products/intuit-mailchimp-all-in-one-marketing-platform/reviews) — 4.4/5 stars (5420 reviews)
- [Dotdigital](https://www.g2.com/products/dotdigital/reviews) — 4.4/5 stars (1199 reviews)
- [GetResponse](https://www.g2.com/products/getresponse/reviews) — 4.3/5 stars (1120 reviews)
- [Campaign Monitor](https://www.g2.com/products/campaign-monitor/reviews) — 4.1/5 stars (722 reviews)
- [Emma](https://www.g2.com/products/emma/reviews) — 4.0/5 stars (555 reviews)
- [Intuit Mailchimp Email Marketing](https://www.g2.com/products/intuit-mailchimp-email-marketing/reviews) — 4.3/5 stars (12960 reviews)
- [Klaviyo](https://www.g2.com/products/klaviyo/reviews) — 4.6/5 stars (1349 reviews)
- [MailerLite](https://www.g2.com/products/mailerlite/reviews) — 4.6/5 stars (1107 reviews)

### Alternatives to Customer.io

- [Iterable](https://www.g2.com/products/iterable/reviews) — 4.4/5 stars (824 reviews)
- [Braze](https://www.g2.com/products/braze/reviews) — 4.5/5 stars (1681 reviews)
- [Klaviyo](https://www.g2.com/products/klaviyo/reviews) — 4.6/5 stars (1349 reviews)
- [OneSignal](https://www.g2.com/products/onesignal/reviews) — 4.7/5 stars (1182 reviews)
- [Insider One](https://www.g2.com/products/insider-one/reviews) — 4.8/5 stars (1356 reviews)
- [CleverTap](https://www.g2.com/products/clevertap/reviews) — 4.6/5 stars (651 reviews)
- [Bloomreach](https://www.g2.com/products/bloomreach-bloomreach/reviews) — 4.6/5 stars (765 reviews)
- [ActiveCampaign](https://www.g2.com/products/activecampaign/reviews) — 4.4/5 stars (14682 reviews)
- [MoEngage](https://www.g2.com/products/moengage/reviews) — 4.5/5 stars (523 reviews)
- [WebEngage](https://www.g2.com/products/webengage/reviews) — 4.5/5 stars (750 reviews)

---
## Top Discussions

### Constant Contact

- Title: [if i buy a email list of 10,000 can i send to all of those people at one time off your site?](https://www.g2.com/discussions/if-i-buy-a-email-list-of-10-000-can-i-send-to-all-of-those-people-at-one-time-off-your-site) — 10 comments, 1 upvote
  > **Top comment:** "You can't buy and e-mail list and loaded it into Constant Contact. They will only send to people who have signed up to receive your e-blasts. You can have..."
- Title: [What is constant contact software?](https://www.g2.com/discussions/what-is-constant-contact-software) — 6 comments
  > **Top comment:** "An efficient, easy-to-employ method of communicating your marketing and/or fundraising messages online."
- Title: [Does a busy small business owner have time to market their company on Constant Contact? (Nope)](https://www.g2.com/discussions/does-a-busy-small-business-owner-have-time-to-market-their-company-on-constant-contact-nope) — 5 comments, 1 upvote
  > **Top comment:** "You say no, but perhaps if you allow Constant Contact to do some of the work for you, you might have a  bit more time to spend on all those other important..."
- Title: [What is Constant Contact used for?](https://www.g2.com/discussions/constant-contact-what-is-constant-contact-used-for) — 4 comments, 1 upvote
  > **Top comment:** "I use Constant Contact to organize, create and send classy newsletters to our group's different membership levels. I'm always getting complimented on how..."
- Title: [Is constant contact taking any responsibility for poor deliveribility?](https://www.g2.com/discussions/14312-is-constant-contact-taking-any-responsibility-for-poor-deliveribility) — 4 comments, 1 upvote
  > **Top comment:** "Hello Amanda - Constant Contact prides itself on high deliverability, and we'd like to look into this further for you to see if there is a specific issue..."

### Customer.io

- Title: [What is Customer.io used for?](https://www.g2.com/discussions/what-is-customer-io-used-for) — 2 comments
  > **Top comment:** "customer.io is an incredibly feature-packed combination of user messaging services into one platform."
- Title: [Is it available in Bangladesh?](https://www.g2.com/discussions/is-it-available-in-bangladesh) — 1 comment, 2 upvotes
  > **Top comment:** "Visit ClimaxRecovery or send an email to info@climaxrecovery.com +1 909 248 4443
Provide all necessary information
Recovery process starts, and your..."
- Title: [What is the best way to make automations a smoother process?](https://www.g2.com/discussions/what-is-the-best-way-to-make-automations-a-smoother-process) — 1 comment, 1 upvote
  > **Top comment:** "Start small workflows. Make use of the content that your marketing and sales teams have. Use Goals. Know when to unenroll the contacts from the automation..."
- Title: [how is this site for mails?](https://www.g2.com/discussions/36887-how-is-this-site-for-mails) — 1 comment, 1 upvote
  > **Top comment:** "I don't know"

---
**Source:** [G2.com](https://www.g2.com) | [Comparison Page](https://www.g2.com/compare/constant-contact-vs-customer-io)