# Contentstack vs Optimizely Content Management System Comparison
---
## AI Generated Summary
- **G2 reviewers report** that **Contentstack** excels in user experience, with many users highlighting its intuitive interface and structured format that simplifies content writing. One user mentioned it made their work easier for creating user-friendly articles, showcasing its effectiveness in content management.
- **Users say** that **Optimizely Content Management System** stands out for its exceptional customer support, with feedback noting availability even on weekends. This level of support is particularly appreciated by users who value quick assistance during critical times.
- **Reviewers mention** that **Contentstack** offers a superior ease of setup, with many users praising its straightforward onboarding process. This is a significant advantage for teams looking to implement a CMS without extensive training or technical expertise.
- **According to verified reviews** , **Optimizely Content Management System** is recognized for its user-friendly navigation, making it accessible even for junior-level e-commerce coordinators. Users appreciate its layout and category organization, which enhances day-to-day usability.
- **G2 reviewers highlight** that **Contentstack** provides robust features for multi-language support, with users noting how easy it is to switch between languages. This capability is crucial for businesses operating in diverse markets.
- **Users report** that while **Optimizely Content Management System** has strong content performance features, it sometimes struggles to meet specific workflow needs, with some reviewers mentioning configuration challenges that could hinder efficiency.



| | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **Star Rating** | 4.4 out of 5 | 4.0 out of 5 | 
| **Total Reviews** | 306 | 197 | 
| **Largest Market Segment** | Mid-Market (44.7% of reviews) | Mid-Market (47.0% of reviews) | 
| **Entry Level Price** | Free | No pricing available | 

---
## Top Pros & Cons

### Contentstack

Pros:
- Ease of Use (59 reviews)
- Content Management (48 reviews)

Cons:
- Content Management (29 reviews)
- Limited Features (17 reviews)

### Optimizely Content Management System

Pros:
- Flexibility (17 reviews)
- Ease of Use (16 reviews)

Cons:
- Learning Curve (11 reviews)
- Expensive (9 reviews)

---
## Ratings Comparison
| Rating | Contentstack | Optimizely Content Management System | 
|---|---|---|
  | **Meets Requirements** | 8.6 (247 reviews) | 8.2 (168 reviews) | 
  | **Ease of Use** | 8.5 (272 reviews) | 7.9 (170 reviews) | 
  | **Ease of Setup** | 8.3 (176 reviews) | 7.3 (125 reviews) | 
  | **Ease of Admin** | 9.1 (89 reviews) | 7.5 (109 reviews) | 
  | **Quality of Support** | 8.7 (209 reviews) | 7.8 (149 reviews) | 
  | **Has the product been a good partner in doing business?** | 9.3 (89 reviews) | 8.1 (98 reviews) | 
  | **Product Direction (% positive)** | 8.9 (242 reviews) | 7.8 (156 reviews) | 

---
## Pricing

### Contentstack

#### Entry-Level Pricing

Plan: Explorer Accounts

Price: Free

Description: With an Explorer account, you can quickly build the stack you need for free.

Key Features:
- Headless CMS
- Personalization engine
- No-code agents & automations

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

#### Free Trial

Yes

### Optimizely Content Management System

#### Entry-Level Pricing

No pricing available

#### Free Trial

No information available

---
## Features Comparison By Category

### Web Content Management

| Product | Score | Reviews |
|---|---|---|
| **Contentstack** | 8.1/10 | 155 |
| **Optimizely Content Management System** | 7.6/10 | 161 |

#### Content

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **Content Authoring** | 8.8 (149 reviews) ✓ Verified | 8.3 (143 reviews) ✓ Verified | 
| **Rich Text Editor** | 8.0 (148 reviews) ✓ Verified | 8.0 (143 reviews) ✓ Verified | 
| **Versioning** | 8.6 (144 reviews) ✓ Verified | 8.0 (137 reviews) ✓ Verified | 
| **Plug-ins/Widgets/Apps** | 7.5 (117 reviews) ✓ Verified | 7.2 (135 reviews) ✓ Verified | 
| **Approval Process** | 8.3 (126 reviews) ✓ Verified | 7.7 (127 reviews) ✓ Verified | 
| **Content Scheduling** | 8.6 (134 reviews) ✓ Verified | 7.9 (135 reviews) ✓ Verified | 
| **Asset Management** | 8.4 (134 reviews) ✓ Verified | 7.6 (136 reviews) ✓ Verified | 
| **Internal Search** | 7.5 (139 reviews) ✓ Verified | 6.9 (139 reviews) ✓ Verified | 
| **Content Repository** | 8.5 (134 reviews) ✓ Verified | 7.9 (134 reviews) ✓ Verified | 

#### Design

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **Breadth of Pre-Built Templates** | 7.4 (102 reviews) ✓ Verified | 6.4 (119 reviews) ✓ Verified | 
| **Mobile** | 7.5 (107 reviews) ✓ Verified | 7.1 (123 reviews) ✓ Verified | 
| **Branding/Themes** | 7.9 (107 reviews) ✓ Verified | 7.5 (120 reviews) ✓ Verified | 
| **Customization** | 8.2 (119 reviews) ✓ Verified | 7.8 (130 reviews) ✓ Verified | 

#### Platform

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **User Community** | 7.6 (110 reviews) ✓ Verified | 7.2 (126 reviews) | 
| **SEO** | 8.0 (123 reviews) ✓ Verified | 7.7 (131 reviews) | 
| **Flexible Navigation Structures** | 8.2 (121 reviews) ✓ Verified | 7.8 (133 reviews) ✓ Verified | 
| **User, Role, and Access Management** | 8.8 (131 reviews) ✓ Verified | 8.0 (137 reviews) ✓ Verified | 
| **Enterprise Scalability** | 8.5 (124 reviews) ✓ Verified | 8.2 (116 reviews) ✓ Verified | 
| **Internationalization** | 8.4 (124 reviews) ✓ Verified | 8.2 (120 reviews) ✓ Verified | 
| **Dashboards and Reports** | 7.3 (105 reviews) ✓ Verified | 6.9 (125 reviews) ✓ Verified | 
| **API / Integrations** | 8.3 (126 reviews) ✓ Verified | 7.7 (125 reviews) ✓ Verified | 

#### Agentic AI - Web Content Management

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **Cross-system Integration** | 7.3 (21 reviews) | Not enough data | 
| **Natural Language Interaction** | 7.3 (22 reviews) | Not enough data | 

### Content Marketing

| Product | Score | Reviews |
|---|---|---|
| **Contentstack** | N/A | N/A |
| **Optimizely Content Management System** | N/A | N/A |

#### Content Creation

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **Content Creation Tools** | Not enough data | Not enough data | 
| **Content Curation** | Not enough data | Not enough data | 
| **Buyer Personas** | Not enough data | Not enough data | 
| **Content Management** | Not enough data | Not enough data | 

#### Optimization

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **SEO** | Not enough data | Not enough data | 
| **A/B Testing** | Not enough data | Not enough data | 
| **Dashboards & Reporting** | Not enough data | Not enough data | 
| **Audience Targeting** | Not enough data | Not enough data | 
| **ROI Reporting** | Not enough data | Not enough data | 

#### Logistics

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **Customizable Templated Workflows** | Not enough data | Not enough data | 
| **Internal Communication** | Not enough data | Not enough data | 
| **Version Control** | Not enough data | Not enough data | 
| **Editing and Approval Tools** | Not enough data | Not enough data | 
| **Distribution Features** | Not enough data | Not enough data | 
| **Integrations & APIs** | Not enough data | Not enough data | 
| **User, Role, and Access Management** | Not enough data | Not enough data | 

### Digital Experience Platforms (DXP)

| Product | Score | Reviews |
|---|---|---|
| **Contentstack** | 7.3/10 | 27 |
| **Optimizely Content Management System** | N/A | N/A |

#### Analytics

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **Web Analytics** | 6.7 (19 reviews) | Not enough data | 
| **Campaign Tracking** | 6.5 (19 reviews) | Not enough data | 
| **Audience Insights** | 6.3 (19 reviews) | Not enough data | 
| **Reports & Dashboards** | 6.4 (19 reviews) | Not enough data | 
| **Personalization** | 7.8 (18 reviews) | Not enough data | 
| **Marketing Automation** | 6.8 (19 reviews) | Not enough data | 

#### Content Management

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **Customizable Templated Workflows** | 7.5 (22 reviews) | Not enough data | 
| **Asset Management** | 7.7 (20 reviews) | Not enough data | 
| **Portals and Sites** | 7.8 (23 reviews) | Not enough data | 

#### Design & Development

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **No-Code App Development** | 8.4 (20 reviews) | Not enough data | 
| **Low-Code App Development** | 8.2 (20 reviews) | Not enough data | 
| **Self-Service Capabilities** | Feature Not Available | Not enough data | 

#### Agentic AI - Digital Experience Platforms

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **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 | 

### WebOps Platforms

| Product | Score | Reviews |
|---|---|---|
| **Contentstack** | 8.1/10 | 12 |
| **Optimizely Content Management System** | 7.4/10 | 15 |

#### Functionality

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **Developer Tools** | 7.6 (7 reviews) | 7.3 (13 reviews) | 
| **Automation** | 8.5 (9 reviews) | 6.3 (12 reviews) | 
| **Website Staging** | 8.1 (9 reviews) | 7.2 (13 reviews) | 

#### Management

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **Web Content Dedication** | 8.2 (10 reviews) | 7.6 (14 reviews) | 
| **Website Hosting** | 8.3 (7 reviews) | 8.3 (14 reviews) | 
| **Role-Based Permissions** | 8.5 (10 reviews) | 7.7 (13 reviews) | 

#### Support

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **CMS Variety** | Feature Not Available | 7.4 (14 reviews) | 
| **Multi-CMS Support** | Feature Not Available | 7.8 (12 reviews) | 
| **Compliance** | 7.7 (8 reviews) | 7.4 (13 reviews) | 

### Headless CMS

| Product | Score | Reviews |
|---|---|---|
| **Contentstack** | 7.6/10 | 145 |
| **Optimizely Content Management System** | 7.8/10 | 15 |

#### Publishing

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **Automated Publishing** | 8.3 (120 reviews) ✓ Verified | 8.2 (14 reviews) | 
| **Multi-language** | 8.3 (122 reviews) ✓ Verified | 8.8 (14 reviews) | 
| **AR/VR Capability** | 5.8 (87 reviews) ✓ Verified | 6.4 (14 reviews) | 

#### Development

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **Image Management** | 7.7 (120 reviews) ✓ Verified | 7.8 (15 reviews) | 
| **Reuseable Content** | 8.3 (121 reviews) ✓ Verified | 7.7 (14 reviews) | 
| **Unlimited Environments** | 8.0 (117 reviews) ✓ Verified | 7.4 (14 reviews) | 
| **Form Builder** | 7.0 (103 reviews) | 7.9 (15 reviews) | 

#### Analytics

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **Personalization** | 7.4 (106 reviews) ✓ Verified | 8.2 (15 reviews) | 
| **Content Performance** | 7.7 (110 reviews) ✓ Verified | 8.0 (15 reviews) | 

#### Agentic AI - Headless CMS

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **Cross-system Integration** | 7.3 (32 reviews) | Not enough data | 

### Content Experience Platforms

| Product | Score | Reviews |
|---|---|---|
| **Contentstack** | 7.6/10 | 38 |
| **Optimizely Content Management System** | N/A | N/A |

#### Content Creation

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **Content Management** | 8.6 (38 reviews) | Not enough data | 

#### Agentic AI - Content Experience Platforms

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **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 | 
| **Adaptive Learning** | Not enough data | Not enough data | 
| **Proactive Assistance** | Not enough data | Not enough data | 
| **Decision Making** | Not enough data | Not enough data | 

#### Optimization

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **ROI Reporting** | 6.6 (33 reviews) | Not enough data | 

### Digital Experience Orchestration (DXO) Platforms

| Product | Score | Reviews |
|---|---|---|
| **Contentstack** | N/A | N/A |
| **Optimizely Content Management System** | N/A | N/A |

#### Integration and Orchestration - Digital Experience Orchestration (DXO) Platforms

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **API Orchestration** | Not enough data | Not enough data | 
| **MACH Architecture Support** | Not enough data | Not enough data | 
| **Content and Data Integration** | Not enough data | Not enough data | 

#### Experience Management and Personalization - Digital Experience Orchestration (DXO) Platforms

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **A/B Testing and Personalization** | Not enough data | Not enough data | 
| **No/Low-Code Tools** | Not enough data | Not enough data | 
| **Visual Interface** | Not enough data | Not enough data | 

### Enterprise Content Management (ECM)

| Product | Score | Reviews |
|---|---|---|
| **Contentstack** | 7.8/10 | 26 |
| **Optimizely Content Management System** | N/A | N/A |

#### Agentic AI - Enterprise Content Management (ECM)

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **Autonomous Task Execution** | Not enough data | Not enough data | 
| **Natural Language Interaction** | Not enough data | Not enough data | 
| **Decision Making** | Not enough data | Not enough data | 

#### File Management

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **File Type Support** | 8.0 (25 reviews) | Not enough data | 
| **Metadata** | 7.6 (23 reviews) | Not enough data | 
| **OCR Scanning** | 6.5 (22 reviews) | Not enough data | 
| **Versioning** | 8.0 (24 reviews) | Not enough data | 
| **Collaboration** | 8.9 (25 reviews) | Not enough data | 
| **Document Assembly** | 7.4 (23 reviews) | Not enough data | 
| **Form Creation** | 7.2 (23 reviews) | Not enough data | 
| **Portals and Sites** | 8.1 (23 reviews) | Not enough data | 
| **Disposition** | 7.7 (22 reviews) | Not enough data | 
| **Search** | 7.2 (26 reviews) | Not enough data | 
| **Web Interface** | 8.3 (25 reviews) | Not enough data | 
| **Mobile Apps** | 6.8 (24 reviews) | Not enough data | 

#### Workflow

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **Process Automation** | 7.7 (22 reviews) | Not enough data | 
| **Conditions** | 7.6 (23 reviews) | Not enough data | 
| **Activities** | 7.7 (23 reviews) | Not enough data | 
| **Records Management** | 8.3 (24 reviews) | Not enough data | 
| **Case Management** | 7.8 (22 reviews) | Not enough data | 

#### Platform

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **Internationalization** | 7.5 (24 reviews) | Not enough data | 
| **Performance and Reliability** | 8.7 (25 reviews) | Not enough data | 
| **Reporting and Auditing** | 7.5 (23 reviews) | Not enough data | 
| **System of Record Integration** | 7.3 (23 reviews) | Not enough data | 
| **APIs** | 8.4 (23 reviews) | Not enough data | 

### SAP Store

| Product | Score | Reviews |
|---|---|---|
| **Contentstack** | N/A | N/A |
| **Optimizely Content Management System** | N/A | N/A |

#### Agentic AI - SAP Store

| Feature | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **Autonomous Task Execution** | Feature Not Available | Not enough data | 
| **Multi-step Planning** | Feature Not Available | Not enough data | 
| **Cross-system Integration** | Feature Not Available | Not enough data | 
| **Adaptive Learning** | Feature Not Available | Not enough data | 
| **Natural Language Interaction** | Feature Not Available | Not enough data | 
| **Proactive Assistance** | Feature Not Available | Not enough data | 
| **Decision Making** | Feature Not Available | Not enough data | 

---
## Categories
**Shared Categories (3):** [Headless CMS Software](https://www.g2.com/categories/headless-cms), [Web Content Management Software](https://www.g2.com/categories/web-content-management), [WebOps Platforms](https://www.g2.com/categories/webops-platforms)

**Unique to Contentstack (5):** [ Digital Experience Orchestration (DXO) Platforms Software](https://www.g2.com/categories/digital-experience-orchestration-dxo-platforms), [Enterprise Content Management (ECM) Systems](https://www.g2.com/categories/enterprise-content-management-ecm), [Content Experience Platforms](https://www.g2.com/categories/content-experience-platforms), [Digital Experience Platforms (DXP)](https://www.g2.com/categories/digital-experience-platforms-dxp), [SAP Store Software](https://www.g2.com/categories/sap-store)



---
## Reviewer Demographics

### By Company Size

| Segment | Contentstack | Optimizely Content Management System | 
|---|---|---|
| **Small-Business** | 17.4% | 17.7% | 
| **Mid-Market** | 44.7% | 47.0% | 
| **Enterprise** | 37.9% | 35.4% | 

### By Industry

#### Contentstack

- **Retail:** 11.5%
- **Computer Software:** 8.0%
- **Financial Services:** 7.3%
- **Consumer Goods:** 5.6%
- **Information Technology and Services:** 5.2%
- **Insurance:** 4.2%
- **Marketing and Advertising:** 4.2%
- **Leisure, Travel & Tourism:** 3.8%
- **Hospitality:** 2.8%
- **Health, Wellness and Fitness:** 2.8%
- **Other:** 44.4%

#### Optimizely Content Management System

- **Information Technology and Services:** 19.0%
- **Computer Software:** 8.9%
- **Financial Services:** 5.6%
- **Marketing and Advertising:** 5.6%
- **Higher Education:** 5.0%
- **Retail:** 4.5%
- **Insurance:** 3.4%
- **Airlines/Aviation:** 2.8%
- **Electrical/Electronic Manufacturing:** 2.8%
- **Government Administration:** 2.2%
- **Other:** 40.2%

---
## Alternatives

### Alternatives to Contentstack

- [Sanity](https://www.g2.com/products/sanity/reviews) — 4.7/5 stars (915 reviews)
- [Storyblok](https://www.g2.com/products/storyblok/reviews) — 4.5/5 stars (585 reviews)
- [Sitecore Digital Experience Platform](https://www.g2.com/products/sitecore-digital-experience-platform/reviews) — 4.1/5 stars (606 reviews)
- [Contentful](https://www.g2.com/products/contentful/reviews) — 4.3/5 stars (326 reviews)
- [Hygraph](https://www.g2.com/products/hygraph/reviews) — 4.4/5 stars (717 reviews)
- [Adobe Experience Manager](https://www.g2.com/products/adobe-experience-manager/reviews) — 4.2/5 stars (674 reviews)
- [Kontent.ai](https://www.g2.com/products/kontent-ai/reviews) — 4.3/5 stars (195 reviews)
- [Umbraco](https://www.g2.com/products/umbraco/reviews) — 4.5/5 stars (1008 reviews)
- [Butter CMS](https://www.g2.com/products/butter-cms/reviews) — 4.6/5 stars (206 reviews)
- [Progress Sitefinity](https://www.g2.com/products/progress-sitefinity/reviews) — 4.0/5 stars (548 reviews)

### Alternatives to Optimizely Content Management System

- [Umbraco](https://www.g2.com/products/umbraco/reviews) — 4.5/5 stars (1008 reviews)
- [Contentful](https://www.g2.com/products/contentful/reviews) — 4.3/5 stars (326 reviews)
- [Sitecore Digital Experience Platform](https://www.g2.com/products/sitecore-digital-experience-platform/reviews) — 4.1/5 stars (606 reviews)
- [Progress Sitefinity](https://www.g2.com/products/progress-sitefinity/reviews) — 4.0/5 stars (548 reviews)
- [Kentico](https://www.g2.com/products/kentico/reviews) — 4.4/5 stars (365 reviews)
- [WordPress.org](https://www.g2.com/products/wordpress-org/reviews) — 4.4/5 stars (9532 reviews)
- [Adobe Experience Manager](https://www.g2.com/products/adobe-experience-manager/reviews) — 4.2/5 stars (674 reviews)
- [Drupal](https://www.g2.com/products/drupal/reviews) — 3.9/5 stars (424 reviews)
- [Sanity](https://www.g2.com/products/sanity/reviews) — 4.7/5 stars (915 reviews)
- [Evoq Content](https://www.g2.com/products/evoq-content/reviews) — 4.0/5 stars (39 reviews)

---
## Top Discussions

### Contentstack

- Title: [What do you like most about Contentstack for content management, and what improvements could be made?](https://www.g2.com/discussions/what-do-you-like-most-about-contentstack-for-content-management-and-what-improvements-could-be-made) — 2 comments
  > **Top comment:** "How easy it is to create, manage and streamline the work."
- Title: [Who owns Contentstack?](https://www.g2.com/discussions/who-owns-contentstack) — 1 comment *(includes official response)*
  > **Top comment:** "Contentstack is a privately-held company founded in 2018. It has received funding from venture capital investors, such as Insight Partners, Illuminate..."
- Title: [How do I use Contentstack?](https://www.g2.com/discussions/how-do-i-use-contentstack) — 1 comment
  > **Top comment:** "Comment deleted by user."
- Title: [What is Contentstack?](https://www.g2.com/discussions/what-is-contentstack) — 1 comment
  > **Top comment:** "Contentstack is more than just a headless content management system (CMS); Contentstack is a content experience platform (CXP) category leader that empowers..."
- Title: [Is Contentstack a CMS?](https://www.g2.com/discussions/is-contentstack-a-cms) — 1 comment
  > **Top comment:** "Yes, Contentstack is a headless content management system (CMS). However, Contentstack is more than a headless CMS - it's a platform that will elevate your..."

### Optimizely Content Management System

- Title: [Does Episerver offer product education?](https://www.g2.com/discussions/education-and-certification) — 2 comments, 1 upvote *(includes official response)*
  > **Top comment:** "You can choose for business users and developers online, as live virtual instruction, and in our training centers worldwide. You can see our current training..."
- Title: [What is Episerver DXC?](https://www.g2.com/discussions/what-is-episerver-dxc) — 1 comment
  > **Top comment:** "Episerver DXC is a cloud-based WCMS that combines content management, digital commerce and personalization capabilities into one platform.
It uses data and..."
- Title: [Is Episerver open source?](https://www.g2.com/discussions/is-episerver-open-source) — 1 comment
  > **Top comment:** "The main product itself is closed source; however, there are open-source first and third-party addons."
- Title: [Is Episerver a CMS?](https://www.g2.com/discussions/is-episerver-a-cms) — 1 comment
  > **Top comment:** "YES - an old-style CMS built on MS .Net.
Not headless "

---
**Source:** [G2.com](https://www.g2.com) | [Comparison Page](https://www.g2.com/compare/contentstack-vs-optimizely-content-management-system)