# Ubuntu, Cisco Duo, Android vs CentOS Comparison

| | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Star Rating** | 4.5 out of 5 | 4.5 out of 5 | 4.6 out of 5 | 4.4 out of 5 | 
| **Total Reviews** | 2,391 | 516 | 1,273 | 426 | 
| **Largest Market Segment** | Small-Business (47.3% of reviews) | Enterprise (43.3% of reviews) | Small-Business (52.4% of reviews) | Mid-Market (38.4% of reviews) | 
| **Entry Level Price** | No pricing available | Free | No pricing available | No pricing available | 

---
## Top Pros & Cons

### Ubuntu

Pros:
- Ease of Use (334 reviews)
- Linux/Ubuntu OS (298 reviews)

Cons:
- Compatibility Issues (140 reviews)
- Limited Software (102 reviews)

### Cisco Duo

Pros:
- Ease of Use (68 reviews)
- Security (65 reviews)

Cons:
- Authentication Issues (23 reviews)
- Login Issues (16 reviews)

### Android

Pros:
- Customization/Personalization (35 reviews)
- User-Friendly (34 reviews)

Cons:
- Slow Updates (26 reviews)
- Bloatware Issues (17 reviews)

### CentOS

Pros:
- Reliability (16 reviews)
- Stability (14 reviews)

Cons:
- Outdated Technology (7 reviews)
- Lack of Support (5 reviews)

---
## Ratings Comparison
| Rating | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
  | **Meets Requirements** | 9.0 (1883 reviews) | 9.4 (404 reviews) | 9.2 (960 reviews) | 9.1 (342 reviews) | 
  | **Ease of Use** | 8.7 (1900 reviews) | 9.3 (410 reviews) | 9.3 (972 reviews) | 8.5 (343 reviews) | 
  | **Ease of Setup** | 9.0 (913 reviews) | 9.0 (166 reviews) | 9.2 (307 reviews) | 8.6 (220 reviews) | 
  | **Ease of Admin** | 8.7 (650 reviews) | 9.2 (95 reviews) | 8.7 (153 reviews) | 8.5 (204 reviews) | 
  | **Quality of Support** | 8.3 (1727 reviews) | 8.9 (311 reviews) | 8.5 (875 reviews) | 8.1 (286 reviews) | 
  | **Has the product been a good partner in doing business?** | 8.7 (569 reviews) | 9.2 (93 reviews) | 8.8 (139 reviews) | 8.7 (161 reviews) | 
  | **Product Direction (% positive)** | 9.1 (1781 reviews) | 8.4 (390 reviews) | 9.2 (912 reviews) | 8.3 (321 reviews) | 

---
## Pricing

### Ubuntu

#### Entry-Level Pricing

No pricing available

#### Free Trial

Yes

### Cisco Duo

#### Entry-Level Pricing

Plan: Duo Free

Price: Free

Description: Protect access to federated cloud and on-premises applications with Duo's easy-to-use two-factor authentication.

Key Features:
- Add up to 10 users
- Strong MFA
- Seamless integrations

[Browse all 4 editions](https://www.g2.com/products/cisco-duo/pricing)

#### Free Trial

Yes

### Android

#### Entry-Level Pricing

No pricing available

#### Free Trial

No information available

### CentOS

#### Entry-Level Pricing

No pricing available

#### Free Trial

No information available

---
## Features Comparison By Category

### Single Sign-On (SSO)

| Product | Score | Reviews |
|---|---|---|
| **Ubuntu** | N/A | N/A |
| **Cisco Duo** | 9.3/10 | 115 |
| **Android** | N/A | N/A |
| **CentOS** | N/A | N/A |

#### Authentication Options

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Authentication User experience** | Not enough data | 9.3 (98 reviews) | Not enough data | Not enough data | 
| **Supports Required Authentication systems** | Not enough data | 9.3 (96 reviews) | Not enough data | Not enough data | 
| **Multi-Factor Authentication** | Not enough data | 9.6 (99 reviews) | Not enough data | Not enough data | 
| **Supports Required Authentication Methods/Protocols** | Not enough data | 9.4 (89 reviews) | Not enough data | Not enough data | 
| **Federation/SAML support (idp)** | Not enough data | 9.1 (68 reviews) | Not enough data | Not enough data | 
| **Federation/SAML support (sp)** | Not enough data | 9.4 (66 reviews) | Not enough data | Not enough data | 

#### Access Control Types

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Endpoint access** | Not enough data | 9.6 (82 reviews) | Not enough data | Not enough data | 
| **Local Access** | Not enough data | 9.3 (84 reviews) | Not enough data | Not enough data | 
| **Remote Access** | Not enough data | 9.5 (90 reviews) | Not enough data | Not enough data | 
| **Partner Access** | Not enough data | 9.1 (69 reviews) | Not enough data | Not enough data | 
| **Supports BYOD users** | Not enough data | 9.2 (73 reviews) | Not enough data | Not enough data | 

#### Administration

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Ease of installation on server** | Not enough data | 9.1 (78 reviews) | Not enough data | Not enough data | 
| **Password Policy Enforcement** | Not enough data | 9.4 (77 reviews) | Not enough data | Not enough data | 
| **Administration Console** | Not enough data | 9.3 (75 reviews) | Not enough data | Not enough data | 
| **Ease of connecting applications** | Not enough data | 9.3 (78 reviews) | Not enough data | Not enough data | 
| **Self Service Password Administration** | Not enough data | 9.0 (77 reviews) | Not enough data | Not enough data | 

#### Platform

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Multiple Operating system support** | Not enough data | 9.4 (85 reviews) | Not enough data | Not enough data | 
| **Multi-Domain Support** | Not enough data | 9.5 (80 reviews) | Not enough data | Not enough data | 
| **Cross Browser support** | Not enough data | 9.4 (79 reviews) | Not enough data | Not enough data | 
| **Fail over protection** | Not enough data | 9.1 (68 reviews) | Not enough data | Not enough data | 
| **Reporting** | Not enough data | 9.1 (71 reviews) | Not enough data | Not enough data | 
| **Auditing** | Not enough data | 9.0 (67 reviews) | Not enough data | Not enough data | 
| **Third Party Web Services support** | Not enough data | 9.1 (71 reviews) | Not enough data | Not enough data | 

### Multi-Factor Authentication (MFA)

| Product | Score | Reviews |
|---|---|---|
| **Ubuntu** | N/A | N/A |
| **Cisco Duo** | 8.5/10 | 192 |
| **Android** | N/A | N/A |
| **CentOS** | N/A | N/A |

#### Authentication type

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **SMS-Based** | Not enough data | 8.4 (145 reviews) ✓ Verified | Not enough data | Not enough data | 
| **Voice-Based Telephony** | Not enough data | 7.8 (127 reviews) ✓ Verified | Not enough data | Not enough data | 
| **Email-Based** | Not enough data | 8.0 (121 reviews) | Not enough data | Not enough data | 
| **Hardware Token-Based** | Not enough data | 8.2 (124 reviews) ✓ Verified | Not enough data | Not enough data | 
| **Software Token** | Not enough data | 8.8 (140 reviews) ✓ Verified | Not enough data | Not enough data | 
| **Biometric Factor** | Not enough data | 8.3 (122 reviews) ✓ Verified | Not enough data | Not enough data | 
| **Mobile-Push** | Not enough data | 9.3 (161 reviews) ✓ Verified | Not enough data | Not enough data | 
| **Risk-Based Authentication** | Not enough data | 8.7 (121 reviews) ✓ Verified | Not enough data | Not enough data | 

#### Functionality

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Multi-Device Sync** | Not enough data | 8.8 (130 reviews) ✓ Verified | Not enough data | Not enough data | 
| **Backup** | Not enough data | 8.1 (118 reviews) | Not enough data | Not enough data | 

#### Implementation

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Easy Setup** | Not enough data | 9.1 (155 reviews) ✓ Verified | Not enough data | Not enough data | 
| **Mobile SDK** | Not enough data | 8.5 (116 reviews) | Not enough data | Not enough data | 
| **Web SDK** | Not enough data | 8.2 (113 reviews) | Not enough data | Not enough data | 

### Zero Trust Networking

| Product | Score | Reviews |
|---|---|---|
| **Ubuntu** | N/A | N/A |
| **Cisco Duo** | 8.6/10 | 60 |
| **Android** | N/A | N/A |
| **CentOS** | N/A | N/A |

#### Network Management

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Network Segmentation** | Not enough data | 8.6 (22 reviews) | Not enough data | Not enough data | 
| **Network Mapping** | Not enough data | 8.5 (24 reviews) | Not enough data | Not enough data | 
| **Security Analytics** | Not enough data | 8.7 (24 reviews) | Not enough data | Not enough data | 
| **API/Integrations** | Not enough data | 8.9 (41 reviews) | Not enough data | Not enough data | 

#### Security

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Security Automation** | Not enough data | 9.0 (24 reviews) | Not enough data | Not enough data | 
| **Application Security** | Not enough data | 9.6 (49 reviews) | Not enough data | Not enough data | 
| **Workload Protection** | Not enough data | 8.6 (23 reviews) | Not enough data | Not enough data | 
| **Data Protection** | Not enough data | 9.2 (26 reviews) | Not enough data | Not enough data | 

#### Identity Management

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Adaptive Access Control** | Not enough data | 8.8 (28 reviews) | Not enough data | Not enough data | 
| **Identity Scoring** | Not enough data | 8.5 (24 reviews) | Not enough data | Not enough data | 
| **User Monitoring** | Not enough data | 8.8 (27 reviews) | Not enough data | Not enough data | 

#### Generative AI

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **AI Text Summarization** | Not enough data | 6.9 (12 reviews) | Not enough data | Not enough data | 
| **AI Text Generation** | Not enough data | 7.1 (12 reviews) | Not enough data | Not enough data | 

### Cloud Data Security

| Product | Score | Reviews |
|---|---|---|
| **Ubuntu** | N/A | N/A |
| **Cisco Duo** | 8.9/10 | 38 |
| **Android** | N/A | N/A |
| **CentOS** | N/A | N/A |

#### Data Protection

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Data Masking** | Not enough data | 8.9 (29 reviews) | Not enough data | Not enough data | 
| **Data Encryption/Security** | Not enough data | 9.1 (34 reviews) | Not enough data | Not enough data | 
| **Data loss Prevention** | Not enough data | 9.0 (32 reviews) | Not enough data | Not enough data | 
| **Anomoly Detection** | Not enough data | 8.7 (30 reviews) | Not enough data | Not enough data | 
| **Sensitive Data Compliance** | Not enough data | 9.4 (33 reviews) | Not enough data | Not enough data | 

#### Analysis

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Cloud Gap Analytics** | Not enough data | 8.5 (31 reviews) | Not enough data | Not enough data | 
| **Compliance Monitoring** | Not enough data | 8.8 (31 reviews) | Not enough data | Not enough data | 
| **User Analytics** | Not enough data | 8.9 (31 reviews) | Not enough data | Not enough data | 

#### Administration

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Auditing** | Not enough data | 8.8 (29 reviews) | Not enough data | Not enough data | 
| **Data Discovery** | Not enough data | 8.4 (28 reviews) | Not enough data | Not enough data | 
| **Access Control** | Not enough data | 8.9 (30 reviews) | Not enough data | Not enough data | 

### Biometric Authentication

| Product | Score | Reviews |
|---|---|---|
| **Ubuntu** | N/A | N/A |
| **Cisco Duo** | 8.9/10 | 7 |
| **Android** | N/A | N/A |
| **CentOS** | N/A | N/A |

#### Integration

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Uses Open Standards** | Not enough data | 8.9 (6 reviews) | Not enough data | Not enough data | 
| **Mobile SDK** | Not enough data | 8.1 (6 reviews) | Not enough data | Not enough data | 
| **Workforce Authentication** | Not enough data | 9.0 (7 reviews) | Not enough data | Not enough data | 
| **Customer Authentication** | Not enough data | 8.8 (7 reviews) | Not enough data | Not enough data | 

#### Administration

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Encryption** | Not enough data | 9.3 (7 reviews) | Not enough data | Not enough data | 
| **Audit Trails** | Not enough data | 8.9 (6 reviews) | Not enough data | Not enough data | 
| **Regulatory Compliance** | Not enough data | 9.2 (6 reviews) | Not enough data | Not enough data | 

### Risk-Based Authentication (RBA)

| Product | Score | Reviews |
|---|---|---|
| **Ubuntu** | N/A | N/A |
| **Cisco Duo** | 9.2/10 | 24 |
| **Android** | N/A | N/A |
| **CentOS** | N/A | N/A |

#### Administration

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Bi-Directional Identity Synchronization** | Not enough data | 9.4 (18 reviews) | Not enough data | Not enough data | 
| **Policy Management** | Not enough data | 9.1 (21 reviews) | Not enough data | Not enough data | 
| **Cloud Directory** | Not enough data | 9.1 (19 reviews) | Not enough data | Not enough data | 
| **Application Integrations** | Not enough data | Not enough data | Not enough data | Not enough data | 

### Cloud Management Platforms

| Product | Score | Reviews |
|---|---|---|
| **Ubuntu** | 8.6/10 | 45 |
| **Cisco Duo** | N/A | N/A |
| **Android** | N/A | N/A |
| **CentOS** | N/A | N/A |

#### Functionality

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Cloud Consolidation** | 8.9 (38 reviews) | Not enough data | Not enough data | Not enough data | 
| **Cloud Orchestration** | 8.8 (40 reviews) | Not enough data | Not enough data | Not enough data | 
| **Cloud Optimization** | 8.7 (39 reviews) | Not enough data | Not enough data | Not enough data | 

#### Management

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Cloud Cost Analytics** | 8.8 (39 reviews) | Not enough data | Not enough data | Not enough data | 
| **Cloud Security** | 8.9 (38 reviews) | Not enough data | Not enough data | Not enough data | 
| **Cloud Resource Management** | 8.7 (36 reviews) | Not enough data | Not enough data | Not enough data | 
| **Cloud Backup and Recovery** | 8.7 (39 reviews) | Not enough data | Not enough data | Not enough data | 

#### Agentic AI - Cloud Management Platforms

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Autonomous Task Execution** | 8.1 (24 reviews) | Not enough data | Not enough data | Not enough data | 
| **Cross-system Integration** | 8.2 (24 reviews) | Not enough data | Not enough data | Not enough data | 
| **Decision Making** | 8.3 (24 reviews) | Not enough data | Not enough data | Not enough data | 

### Cloud File Security

| Product | Score | Reviews |
|---|---|---|
| **Ubuntu** | N/A | N/A |
| **Cisco Duo** | 9.2/10 | 17 |
| **Android** | N/A | N/A |
| **CentOS** | N/A | N/A |

#### Security

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Encrypted Storage** | Not enough data | 9.4 (13 reviews) | Not enough data | Not enough data | 
| **Anomoly Detection** | Not enough data | 9.0 (13 reviews) | Not enough data | Not enough data | 
| **Data loss Prevention** | Not enough data | 9.1 (13 reviews) | Not enough data | Not enough data | 
| **Policy Enforcement** | Not enough data | 9.3 (14 reviews) | Not enough data | Not enough data | 

#### Administration

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Reporting and Monitoring** | Not enough data | 9.6 (15 reviews) | Not enough data | Not enough data | 
| **Breadth of Partner Applications** | Not enough data | 9.0 (14 reviews) | Not enough data | Not enough data | 
| **Auditing** | Not enough data | 9.3 (14 reviews) | Not enough data | Not enough data | 

#### Access Control

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **User, Role, and Access Management** | Not enough data | 9.7 (15 reviews) | Not enough data | Not enough data | 
| **Access Rights** | Not enough data | 9.1 (15 reviews) | Not enough data | Not enough data | 
| **User Analytics** | Not enough data | 9.2 (14 reviews) | Not enough data | Not enough data | 
| **Compliance Monitoring** | Not enough data | 9.0 (14 reviews) | Not enough data | Not enough data | 

### Passwordless Authentication

| Product | Score | Reviews |
|---|---|---|
| **Ubuntu** | N/A | N/A |
| **Cisco Duo** | 8.8/10 | 43 |
| **Android** | N/A | N/A |
| **CentOS** | N/A | N/A |

#### Functionality

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **FIDO2-compliant** | Not enough data | 9.0 (34 reviews) | Not enough data | Not enough data | 
| **Works with hardware security keys** | Not enough data | 8.8 (34 reviews) | Not enough data | Not enough data | 
| **Multiple authentication methods** | Not enough data | 9.2 (41 reviews) | Not enough data | Not enough data | 
| **Offline or no-phone solution** | Not enough data | 8.0 (38 reviews) | Not enough data | Not enough data | 

### Identity and Access Management (IAM)

| Product | Score | Reviews |
|---|---|---|
| **Ubuntu** | N/A | N/A |
| **Cisco Duo** | 9.0/10 | 19 |
| **Android** | N/A | N/A |
| **CentOS** | N/A | N/A |

#### Functionality

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **User provisioning** | Not enough data | 9.6 (8 reviews) | Not enough data | Not enough data | 
| **Password manager** | Not enough data | 8.3 (10 reviews) | Not enough data | Not enough data | 
| **Single Sign-on** | Not enough data | 8.9 (11 reviews) | Not enough data | Not enough data | 
| **Enforces policies** | Not enough data | 8.7 (10 reviews) | Not enough data | Not enough data | 
| **Authentication** | Not enough data | 9.8 (14 reviews) | Not enough data | Not enough data | 
| **Multi-factor authentication** | Not enough data | 10.0 (17 reviews) | Not enough data | Not enough data | 

####  Type

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **On-premises solution** | Not enough data | 8.7 (10 reviews) | Not enough data | Not enough data | 
| **Cloud-solution** | Not enough data | 8.2 (10 reviews) | Not enough data | Not enough data | 

####  Reporting

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Tracking** | Not enough data | 9.1 (9 reviews) | Not enough data | Not enough data | 
| **Reporting** | Not enough data | 8.8 (10 reviews) | Not enough data | Not enough data | 
| **Access & Permission Change Reporting** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Compliance & Audit Trail Export** | Not enough data | Not enough data | Not enough data | Not enough data | 

#### Authentication & Authorization - Identity and Access Management (IAM)

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Adaptive & Contextual Access Control** | Not enough data | Not enough data | Not enough data | Not enough data | 

#### Administration & Governance - Identity and Access Management (IAM)

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Identity Lifecycle Management** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Self‑Service Account Management** | Not enough data | Not enough data | Not enough data | Not enough data | 

#### Generative AI - Identity and Access Management (IAM)

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **AI‑Driven Access Anomaly Detection** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Automated Policy Tuning** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Predictive Role Recommendations** | Not enough data | Not enough data | Not enough data | Not enough data | 

### Server Virtualization

| Product | Score | Reviews |
|---|---|---|
| **Ubuntu** | 8.8/10 | 93 |
| **Cisco Duo** | N/A | N/A |
| **Android** | N/A | N/A |
| **CentOS** | N/A | N/A |

#### Performance

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Scalability** | 9.4 (76 reviews) | Not enough data | Not enough data | Not enough data | 
| **Portability** | 9.4 (72 reviews) | Not enough data | Not enough data | Not enough data | 
| **Data Recovery** | 8.7 (71 reviews) | Not enough data | Not enough data | Not enough data | 

#### Functionality

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **OS Integration** | 9.3 (72 reviews) | Not enough data | Not enough data | Not enough data | 
| **Resource Saving** | 9.0 (74 reviews) | Not enough data | Not enough data | Not enough data | 
| **Performance Management** | 9.2 (70 reviews) | Not enough data | Not enough data | Not enough data | 
| **Security** | 9.4 (72 reviews) | Not enough data | Not enough data | Not enough data | 

#### Agentic AI - Server Virtualization

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Autonomous Task Execution** | 8.1 (43 reviews) | Not enough data | Not enough data | Not enough data | 
| **Multi-step Planning** | 8.4 (43 reviews) | Not enough data | Not enough data | Not enough data | 
| **Cross-system Integration** | 8.5 (44 reviews) | Not enough data | Not enough data | Not enough data | 
| **Adaptive Learning** | 8.3 (43 reviews) | Not enough data | Not enough data | Not enough data | 
| **Proactive Assistance** | 8.3 (42 reviews) | Not enough data | Not enough data | Not enough data | 
| **Decision Making** | 8.5 (43 reviews) | Not enough data | Not enough data | Not enough data | 

### Container Engine

| Product | Score | Reviews |
|---|---|---|
| **Ubuntu** | 9.0/10 | 59 |
| **Cisco Duo** | N/A | N/A |
| **Android** | N/A | N/A |
| **CentOS** | N/A | N/A |

#### Application Support

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Deployment** | 9.2 (48 reviews) | Not enough data | Not enough data | Not enough data | 
| **Interface support** | 8.8 (40 reviews) | Not enough data | Not enough data | Not enough data | 
| **Processor support** | 9.3 (36 reviews) | Not enough data | Not enough data | Not enough data | 
| **Application Support** | 9.1 (46 reviews) | Not enough data | Not enough data | Not enough data | 

#### System Capability

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Self Healing High Availability** | 8.7 (33 reviews) | Not enough data | Not enough data | Not enough data | 
| **Orchestration** | 9.0 (40 reviews) | Not enough data | Not enough data | Not enough data | 
| **Scalability** | 9.2 (38 reviews) | Not enough data | Not enough data | Not enough data | 

#### Security

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Automatic Security Updates** | 9.1 (41 reviews) | Not enough data | Not enough data | Not enough data | 
| **Security updates** | 9.0 (41 reviews) | Not enough data | Not enough data | Not enough data | 

### Operating System

| Product | Score | Reviews |
|---|---|---|
| **Ubuntu** | 8.8/10 | 280 |
| **Cisco Duo** | N/A | N/A |
| **Android** | 8.9/10 | 127 |
| **CentOS** | 8.8/10 | 26 |

#### Memory Management - Operating System

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **RAM management** | 9.1 (202 reviews) | Not enough data | 8.7 (101 reviews) | 9.2 (19 reviews) | 

#### Device Management - Operating System

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **I/O management** | 8.7 (220 reviews) | Not enough data | 9.2 (95 reviews) | 9.0 (19 reviews) | 

#### Backup and Recovery - Operating System

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Data backup** | 8.6 (174 reviews) | Not enough data | 9.1 (102 reviews) | 8.2 (14 reviews) | 

#### Error Detection - Operating System

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **System operations monitoring** | 8.8 (189 reviews) | Not enough data | 8.4 (93 reviews) | 8.8 (20 reviews) | 

### Zero Trust Platforms

| Product | Score | Reviews |
|---|---|---|
| **Ubuntu** | N/A | N/A |
| **Cisco Duo** | 9.7/10 | 6 |
| **Android** | N/A | N/A |
| **CentOS** | N/A | N/A |

#### Identity and Access Management - Zero Trust Platforms

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Single sign-on (SSO)** | Not enough data | 9.7 (5 reviews) | Not enough data | Not enough data | 
| **Multi-factor authentication (MFA)** | Not enough data | 10.0 (5 reviews) | Not enough data | Not enough data | 
| **Role-based access control (RBAC)** | Not enough data | 9.7 (5 reviews) | Not enough data | Not enough data | 
| **Identity federation** | Not enough data | Not enough data | Not enough data | Not enough data | 

#### Security - Zero Trust Platforms

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Encryption** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Endpoint detection and response (EDR)** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Device posture assessment** | Not enough data | 9.3 (5 reviews) | Not enough data | Not enough data | 
| **Micro-segmentation** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Zero trust network access (ZTNA)** | Not enough data | Not enough data | Not enough data | Not enough data | 

#### Data Security - Zero Trust Platforms

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Data loss prevention (DLP)** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Data classification** | Not enough data | Not enough data | Not enough data | Not enough data | 

#### Application Visibility - Zero Trust Platforms

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **API support** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Application-level controls** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Secure application access** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **User and entity behavior analytics (UEBA)** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Continuous monitoring** | Not enough data | Not enough data | Not enough data | Not enough data | 

#### Reporting and Policies - Zero Trust Platforms

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Policy automation** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Regulatory compliance** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Cross-platform compatibility** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Policy enforcement** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Comprehensive reporting** | Not enough data | Not enough data | Not enough data | Not enough data | 

#### Agentic AI - Zero Trust Platforms

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Autonomous Task Execution** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Cross-system Integration** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Adaptive Learning** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Proactive Assistance** | Not enough data | Not enough data | Not enough data | Not enough data | 

### AWS Marketplace

| Product | Score | Reviews |
|---|---|---|
| **Ubuntu** | N/A | N/A |
| **Cisco Duo** | N/A | N/A |
| **Android** | N/A | N/A |
| **CentOS** | N/A | N/A |

#### Agentic AI - AWS Marketplace

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Autonomous Task Execution** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Multi-step Planning** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Cross-system Integration** | Not enough data | Not enough data | Not enough data | Not enough data | 

### Cloud Security

| Product | Score | Reviews |
|---|---|---|
| **Ubuntu** | N/A | N/A |
| **Cisco Duo** | N/A | N/A |
| **Android** | N/A | N/A |
| **CentOS** | N/A | N/A |

#### Cloud Visibility

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Data Discovery** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Cloud Registry** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Cloud Gap Analytics** | Not enough data | Not enough data | Not enough data | Not enough data | 

#### Security

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Data Security** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Data loss Prevention** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Security Auditing** | Not enough data | Not enough data | Not enough data | Not enough data | 

#### Identity

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **SSO** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Governance** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **User Analytics** | Not enough data | Not enough data | Not enough data | Not enough data | 

### IoT Operating Systems

| Product | Score | Reviews |
|---|---|---|
| **Ubuntu** | 8.9/10 | 41 |
| **Cisco Duo** | N/A | N/A |
| **Android** | N/A | N/A |
| **CentOS** | N/A | N/A |

#### Security

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Access Controls** | 8.8 (34 reviews) | Not enough data | Not enough data | Not enough data | 
| **Network Security** | 9.3 (35 reviews) | Not enough data | Not enough data | Not enough data | 
| **Compliance** | 8.9 (32 reviews) | Not enough data | Not enough data | Not enough data | 
| **Cryptography** | 8.5 (31 reviews) | Not enough data | Not enough data | Not enough data | 

### Security Compliance

| Product | Score | Reviews |
|---|---|---|
| **Ubuntu** | 8.3/10 | 49 |
| **Cisco Duo** | N/A | N/A |
| **Android** | N/A | N/A |
| **CentOS** | N/A | N/A |

#### Generative AI - Security Compliance

| Feature | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Predictive Risk** | 8.2 (36 reviews) | Not enough data | Not enough data | Not enough data | 
| **Automated Documentation** | 8.4 (34 reviews) | Not enough data | Not enough data | Not enough data | 

---
## Categories

**Unique to Ubuntu (6):** [Security Compliance Software](https://www.g2.com/categories/security-compliance), [Cloud Management Platforms](https://www.g2.com/categories/cloud-management-platforms), [IoT Operating Systems](https://www.g2.com/categories/iot-operating-systems), [Operating Systems](https://www.g2.com/categories/operating-system), [Server Virtualization Software](https://www.g2.com/categories/server-virtualization), [Container Engine Software](https://www.g2.com/categories/container-engine)

**Unique to Cisco Duo (10):** [Passwordless Authentication Software](https://www.g2.com/categories/passwordless-authentication), [Cloud File Security Software](https://www.g2.com/categories/cloud-file-security), [Cloud Data Security Software](https://www.g2.com/categories/cloud-data-security), [Zero Trust Networking Software](https://www.g2.com/categories/zero-trust-networking), [Risk-Based Authentication Software](https://www.g2.com/categories/risk-based-authentication-rba), [Multi-Factor Authentication (MFA) Software](https://www.g2.com/categories/multi-factor-authentication-mfa), [Single Sign-On (SSO) Solutions](https://www.g2.com/categories/single-sign-on-sso), [Identity and Access Management (IAM) Software](https://www.g2.com/categories/identity-and-access-management-iam), [Biometric Authentication Software](https://www.g2.com/categories/biometric-authentication), [Zero Trust Platforms](https://www.g2.com/categories/zero-trust-platforms)

**Unique to Android (1):** [Operating Systems](https://www.g2.com/categories/operating-system)

**Unique to CentOS (2):** [Operating Systems](https://www.g2.com/categories/operating-system), [AWS Marketplace Software](https://www.g2.com/categories/aws-marketplace)


---
## Reviewer Demographics

### By Company Size

| Segment | Ubuntu | Cisco Duo | Android | CentOS | 
|---|---|---|---|---|
| **Small-Business** | 47.3% | 18.8% | 52.4% | 31.7% | 
| **Mid-Market** | 33.1% | 37.9% | 25.2% | 38.4% | 
| **Enterprise** | 19.6% | 43.3% | 22.4% | 30.0% | 

### By Industry

#### Ubuntu

- **Information Technology and Services:** 26.3%
- **Computer Software:** 25.1%
- **Computer & Network Security:** 5.3%
- **Higher Education:** 3.5%
- **Internet:** 2.9%
- **Telecommunications:** 2.5%
- **Financial Services:** 2.1%
- **Program Development:** 1.8%
- **Education Management:** 1.8%
- **Research:** 1.5%
- **Other:** 27.3%

#### Cisco Duo

- **Information Technology and Services:** 17.8%
- **Higher Education:** 11.8%
- **Computer Software:** 5.7%
- **Hospital & Health Care:** 5.1%
- **Financial Services:** 4.9%
- **Education Management:** 4.7%
- **Computer & Network Security:** 3.6%
- **Internet:** 2.5%
- **Telecommunications:** 2.1%
- **Insurance:** 2.1%
- **Other:** 39.7%

#### Android

- **Information Technology and Services:** 19.1%
- **Computer Software:** 14.4%
- **Higher Education:** 3.5%
- **Computer & Network Security:** 3.0%
- **Telecommunications:** 3.0%
- **Hospital & Health Care:** 2.5%
- **Education Management:** 2.4%
- **Marketing and Advertising:** 2.0%
- **Retail:** 1.8%
- **Financial Services:** 1.8%
- **Other:** 46.4%

#### CentOS

- **Information Technology and Services:** 30.2%
- **Computer Software:** 15.7%
- **Computer & Network Security:** 5.7%
- **Telecommunications:** 4.2%
- **Internet:** 3.7%
- **Higher Education:** 3.0%
- **Financial Services:** 2.7%
- **Research:** 1.7%
- **Program Development:** 1.5%
- **Education Management:** 1.2%
- **Other:** 30.2%

---
## Alternatives

### Alternatives to Ubuntu

- [Red Hat Enterprise Linux](https://www.g2.com/products/red-hat-enterprise-linux/reviews) — 4.6/5 stars (975 reviews)
- [Windows 11](https://www.g2.com/products/windows-11/reviews) — 4.5/5 stars (4283 reviews)
- [Apple iOS](https://www.g2.com/products/apple-ios/reviews) — 4.6/5 stars (1568 reviews)
- [Windows 7](https://www.g2.com/products/windows-7/reviews) — 4.2/5 stars (896 reviews)
- [Windows 8](https://www.g2.com/products/windows-8/reviews) — 3.7/5 stars (577 reviews)
- [macOS Sierra](https://www.g2.com/products/apple-macos-sierra/reviews) — 4.5/5 stars (484 reviews)
- [Oracle Linux](https://www.g2.com/products/oracle-linux/reviews) — 4.4/5 stars (347 reviews)
- [Chrome OS](https://www.g2.com/products/chrome-os/reviews) — 4.5/5 stars (722 reviews)
- [Apple OS X El Capitan](https://www.g2.com/products/apple-os-x-el-capitan/reviews) — 4.4/5 stars (262 reviews)
- [Debian](https://www.g2.com/products/debian/reviews) — 4.6/5 stars (221 reviews)

### Alternatives to Cisco Duo

- [CyberArk Workforce Identity](https://www.g2.com/products/cyberark-workforce-identity/reviews) — 4.5/5 stars (130 reviews)
- [LastPass](https://www.g2.com/products/lastpass/reviews) — 4.5/5 stars (2048 reviews)
- [Microsoft Entra ID](https://www.g2.com/products/microsoft-entra-id/reviews) — 4.5/5 stars (910 reviews)
- [OneLogin](https://www.g2.com/products/onelogin/reviews) — 4.4/5 stars (290 reviews)
- [Auth0](https://www.g2.com/products/auth0/reviews) — 4.3/5 stars (269 reviews)
- [SecureAuth: Workforce IAM](https://www.g2.com/products/secureauth-workforce-iam/reviews) — 4.4/5 stars (29 reviews)
- [Ping Identity](https://www.g2.com/products/ping-identity/reviews) — 4.4/5 stars (119 reviews)
- [Okta](https://www.g2.com/products/okta/reviews) — 4.5/5 stars (1228 reviews)
- [JumpCloud](https://www.g2.com/products/jumpcloud/reviews) — 4.5/5 stars (3973 reviews)
- [1Password](https://www.g2.com/products/1password/reviews) — 4.6/5 stars (1797 reviews)

### Alternatives to Android

- [Apple iOS](https://www.g2.com/products/apple-ios/reviews) — 4.6/5 stars (1568 reviews)
- [Windows 7](https://www.g2.com/products/windows-7/reviews) — 4.2/5 stars (896 reviews)
- [Windows 8](https://www.g2.com/products/windows-8/reviews) — 3.7/5 stars (577 reviews)
- [Red Hat Enterprise Linux](https://www.g2.com/products/red-hat-enterprise-linux/reviews) — 4.6/5 stars (975 reviews)
- [Windows 11](https://www.g2.com/products/windows-11/reviews) — 4.5/5 stars (4283 reviews)
- [BlackBerry QNX](https://www.g2.com/products/blackberry-qnx/reviews) — 4.2/5 stars (21 reviews)
- [Fedora](https://www.g2.com/products/fedora/reviews) — 4.4/5 stars (212 reviews)
- [Oracle Linux](https://www.g2.com/products/oracle-linux/reviews) — 4.4/5 stars (347 reviews)
- [Apple OS X El Capitan](https://www.g2.com/products/apple-os-x-el-capitan/reviews) — 4.4/5 stars (262 reviews)
- [Lubuntu](https://www.g2.com/products/lubuntu/reviews) — 4.4/5 stars (82 reviews)

### Alternatives to CentOS

- [Red Hat Enterprise Linux](https://www.g2.com/products/red-hat-enterprise-linux/reviews) — 4.6/5 stars (975 reviews)
- [Windows 7](https://www.g2.com/products/windows-7/reviews) — 4.2/5 stars (896 reviews)
- [macOS Sierra](https://www.g2.com/products/apple-macos-sierra/reviews) — 4.5/5 stars (484 reviews)
- [Oracle Linux](https://www.g2.com/products/oracle-linux/reviews) — 4.4/5 stars (347 reviews)
- [Kali Linux](https://www.g2.com/products/kali-linux/reviews) — 4.5/5 stars (242 reviews)
- [Fedora](https://www.g2.com/products/fedora/reviews) — 4.4/5 stars (212 reviews)
- [Linux Mint](https://www.g2.com/products/linux-mint/reviews) — 4.5/5 stars (189 reviews)
- [Apple iOS](https://www.g2.com/products/apple-ios/reviews) — 4.6/5 stars (1568 reviews)
- [Debian](https://www.g2.com/products/debian/reviews) — 4.6/5 stars (221 reviews)
- [Lubuntu](https://www.g2.com/products/lubuntu/reviews) — 4.4/5 stars (82 reviews)

---
## Top Discussions

### Ubuntu

- Title: [I'm having trouble installing applications on Ubuntu. What are the best practices for a beginner?](https://www.g2.com/discussions/i-m-having-trouble-installing-applications-on-ubuntu-what-are-the-best-practices-for-a-beginner) — 7 comments, 1 upvote
  > **Top comment:** "Please let me know the error, I can help you in installing application on Ubuntu."
- Title: [Is Ubuntu really good OS comoared to other Linux distros?](https://www.g2.com/discussions/is-ubuntu-really-good-os-comoared-to-other-linux-distros) — 7 comments, 2 upvotes
  > **Top comment:** "Hi Avinash,

The packaging system of Ubuntu is inherited from Debian and is very well structured and maintained, making it relatively seldom necessary to..."
- Title: [What is Ubuntu used for?](https://www.g2.com/discussions/what-is-ubuntu-used-for) — 6 comments, 2 upvotes
  > **Top comment:** "operating system"
- Title: [What is Ubuntu Desktop used for?](https://www.g2.com/discussions/what-is-ubuntu-desktop-used-for) — 6 comments, 2 upvotes
  > **Top comment:** "Thanks you
"
- Title: [What is special about Ubuntu?](https://www.g2.com/discussions/what-is-special-about-ubuntu) — 5 comments, 5 upvotes
  > **Top comment:** "is one of the stable linux."

### Cisco Duo

- Title: [What is Duo Security used for?](https://www.g2.com/discussions/what-is-duo-security-used-for) — 3 comments
  > **Top comment:** "Comment deleted by user."
- Title: [Is Duo Security free?](https://www.g2.com/discussions/is-duo-security-free) — 3 comments
  > **Top comment:** "No"
- Title: [Is Duo Security Safe?](https://www.g2.com/discussions/is-duo-security-safe) — 2 comments
  > **Top comment:** "yes, it's safe"
- Title: [What is a key feature of duo?](https://www.g2.com/discussions/what-is-a-key-feature-of-duo) — 2 comments
  > **Top comment:** "One key feature of Duo Security is its strong two-factor authentication. It adds an additional layer of security to the login process by requiring users to..."
- Title: [What is duo security software?](https://www.g2.com/discussions/what-is-duo-security-software) — 2 comments
  > **Top comment:** "Duo is a dual factor authentication. This is additional security on top of the password "

### Android

- Title: [how am i able to update to the most recent version if my phone wont allow?](https://www.g2.com/discussions/how-am-i-able-to-update-to-the-most-recent-version-if-my-phone-wont-allow) — 5 comments, 1 upvote
  > **Top comment:** "If your phone is not compatible with the newest version of android then you might have to wait a little while for the new android if not then you might have..."
- Title: [How can i increase some performance as stable as while gaming](https://www.g2.com/discussions/51992-how-can-i-increase-some-performance-as-stable-as-while-gaming) — 4 comments, 1 upvote
  > **Top comment:** "Optimize you phone allow necessary storage free "
- Title: [What is Android used for?](https://www.g2.com/discussions/what-is-android-used-for) — 3 comments
  > **Top comment:** "For developing enterprise applications which are used to play any type of media in signage, soc."
- Title: [What are more advanced features of Android and what are their benefits?](https://www.g2.com/discussions/what-are-more-advanced-features-of-android-and-what-are-their-benefits) — 3 comments, 1 upvote
  > **Top comment:** "Androide "
- Title: [Would you like to use Android or iOS?](https://www.g2.com/discussions/would-you-like-to-use-android-or-ios) — 3 comments, 1 upvote
  > **Top comment:** "Android
"

### CentOS

- Title: [how can I install and use CentOS](https://www.g2.com/discussions/how-can-i-install-and-use-centos) — 1 comment, 1 upvote
  > **Top comment:** "First download centos from the official repo. 
Later you can install by booting up your computer/laptop with centos iso image."
- Title: [How to install package?](https://www.g2.com/discussions/how-to-install-package) — 1 comment, 1 upvote
  > **Top comment:** "For install package use command : yum install <package_name>"
- Title: [Bolehkah ini digunakan untuk acara pembelajaran?](https://www.g2.com/discussions/can-this-be-used-for-learning-events) — 1 comment, 1 upvote
  > **Top comment:** "Yes. You can run Moodle, or other learning management system (LMS) products on CentOS Linux, or event management software. There is a rich set of open source..."
- Title: [Where did you go to learn how to use CentOS?](https://www.g2.com/discussions/51381-where-did-you-go-to-learn-how-to-use-centos) — 1 comment, 1 upvote
  > **Top comment:** "At my first job organization. 
Some learning forums like stackexchange, tldp, the Linux Foundation etc..., 
"
- Title: [How can I acheive client isolation ?](https://www.g2.com/discussions/how-can-i-acheive-client-isolation) — 1 comment, 1 upvote
  > **Top comment:** "When I was learning about client isolation I found this web article very helpful. I hope it will help you. 

..."

---
**Source:** [G2.com](https://www.g2.com) | [Comparison Page](https://www.g2.com/compare/ubuntu-vs-cisco-duo-vs-android-vs-centos)