# IBM Db2, MongoDB Atlas, Amazon Relational Database Service (RDS) vs PostgreSQL Comparison

| | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Star Rating** | 4.1 out of 5 | 4.5 out of 5 | 4.5 out of 5 | 4.4 out of 5 | 
| **Total Reviews** | 682 | 371 | 907 | 679 | 
| **Largest Market Segment** | Enterprise (66.0% of reviews) | Small-Business (57.9% of reviews) | Mid-Market (37.7% of reviews) | Small-Business (35.9% of reviews) | 
| **Entry Level Price** | Free Trial 1 License | No pricing available | No pricing available | No pricing available | 

---
## Top Pros & Cons

### IBM Db2

Pros:
- Performance (6 reviews)
- Reliability (6 reviews)

Cons:
- Feature Limitations (3 reviews)
- Complexity (2 reviews)

### MongoDB Atlas

Pros:
- Ease of Use (7 reviews)
- Scalability (5 reviews)

Cons:
- Expensive Pricing (3 reviews)
- Unclear Pricing (3 reviews)

### Amazon Relational Database Service (RDS)

Pros:
- Ease of Use (15 reviews)
- Scalability (13 reviews)

Cons:
- Expensive (18 reviews)
- Complexity (7 reviews)

### PostgreSQL

Pros:
- Features (13 reviews)
- Ease of Use (11 reviews)

Cons:
- Beginner Unfriendliness (7 reviews)
- Complexity (6 reviews)

---
## Ratings Comparison
| Rating | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
  | **Meets Requirements** | 8.5 (488 reviews) | 8.9 (272 reviews) | 9.0 (744 reviews) | 9.1 (555 reviews) | 
  | **Ease of Use** | 8.0 (497 reviews) | 9.0 (275 reviews) | 8.8 (752 reviews) | 8.5 (560 reviews) | 
  | **Ease of Setup** | 7.7 (263 reviews) | 9.1 (105 reviews) | 8.9 (528 reviews) | 8.4 (289 reviews) | 
  | **Ease of Admin** | 7.7 (242 reviews) | 8.7 (96 reviews) | 8.7 (436 reviews) | 8.2 (251 reviews) | 
  | **Quality of Support** | 8.1 (461 reviews) | 8.7 (242 reviews) | 8.6 (716 reviews) | 7.9 (449 reviews) | 
  | **Has the product been a good partner in doing business?** | 8.3 (234 reviews) | 8.8 (91 reviews) | 8.8 (424 reviews) | 8.5 (199 reviews) | 
  | **Product Direction (% positive)** | 6.8 (456 reviews) | 9.3 (268 reviews) | 9.5 (704 reviews) | 8.5 (540 reviews) | 

---
## Pricing

### IBM Db2

#### Entry-Level Pricing

Plan: Db2 On Cloud - Lite 

Price: Free Trial 1 License

Description: A completely free edition of DB2 on Cloud.

Key Features:
- Enjoy high performance and elastic scaling with Db2’s fully managed database and warehouse solutions in the cloud. Try for free.

[Browse all 6 editions](https://www.g2.com/products/ibm-db2/pricing)

#### Free Trial

Yes

### MongoDB Atlas

#### Entry-Level Pricing

No pricing available

#### Free Trial

No information available

### Amazon Relational Database Service (RDS)

#### Entry-Level Pricing

No pricing available

#### Free Trial

Yes

### PostgreSQL

#### Entry-Level Pricing

No pricing available

#### Free Trial

No information available

---
## Features Comparison By Category

### Business Intelligence

| Product | Score | Reviews |
|---|---|---|
| **IBM Db2** | N/A | N/A |
| **MongoDB Atlas** | 8.6/10 | 62 |
| **Amazon Relational Database Service (RDS)** | N/A | N/A |
| **PostgreSQL** | N/A | N/A |

#### Reports

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Reports Interface** | Not enough data | 8.2 (51 reviews) | Not enough data | Not enough data | 
| **Steps to Answer** | Not enough data | 8.2 (49 reviews) | Not enough data | Not enough data | 
| **Graphs and Charts** | Not enough data | 8.9 (57 reviews) | Not enough data | Not enough data | 
| **Score Cards** | Not enough data | 8.9 (46 reviews) | Not enough data | Not enough data | 
| **Dashboards** | Not enough data | 8.9 (55 reviews) | Not enough data | Not enough data | 

#### Self Service 

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Calculated Fields** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Data Column Filtering** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Data Discovery** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Search** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Collaboration / Workflow** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Automodeling** | Not enough data | Not enough data | Not enough data | Not enough data | 

#### Advanced Analytics

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Predictive Analytics** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Data Visualization** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Big Data Services** | Not enough data | Not enough data | Not enough data | Not enough data | 

#### Building Reports

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Data Transformation** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Data Modeling** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **WYSIWYG Report Design** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Integration APIs** | Not enough data | Not enough data | Not enough data | Not enough data | 

#### Platform

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Mobile User Support** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Customization ** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **User, Role, and Access Management** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Internationalization** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Sandbox / Test Environments** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Performance and Reliability** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **Breadth of Partner Applications** | Not enough data | Not enough data | Not enough data | Not enough data | 

### Data Visualization

| Product | Score | Reviews |
|---|---|---|
| **IBM Db2** | N/A | N/A |
| **MongoDB Atlas** | 8.6/10 | 64 |
| **Amazon Relational Database Service (RDS)** | N/A | N/A |
| **PostgreSQL** | N/A | N/A |

#### Reports

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Reports Interface** | Not enough data | 8.2 (51 reviews) | Not enough data | Not enough data | 
| **Steps to Answer** | Not enough data | 8.2 (49 reviews) | Not enough data | Not enough data | 
| **Graphs and Charts** | Not enough data | 8.9 (57 reviews) | Not enough data | Not enough data | 
| **Score Cards** | Not enough data | 8.9 (46 reviews) | Not enough data | Not enough data | 
| **Dashboards** | Not enough data | 8.9 (55 reviews) | Not enough data | Not enough data | 

#### Reports

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Reports Interface** | Not enough data | 8.6 (53 reviews) | Not enough data | Not enough data | 
| **Share Reports** | Not enough data | 8.6 (51 reviews) | Not enough data | Not enough data | 
| **Steps to Answer** | Not enough data | 7.9 (48 reviews) | Not enough data | Not enough data | 

#### Generative AI

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **AI Text Generation** | Not enough data | Not enough data | Not enough data | Not enough data | 
| **AI Text Summarization** | Not enough data | Not enough data | Not enough data | Not enough data | 

#### Visualization

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Graphs and Charts** | Not enough data | 9.0 (56 reviews) | Not enough data | Not enough data | 
| **Score Cards** | Not enough data | 8.4 (46 reviews) | Not enough data | Not enough data | 
| **Dashboards** | Not enough data | 9.2 (55 reviews) | Not enough data | Not enough data | 
| **Formats** | Not enough data | 8.5 (49 reviews) | Not enough data | Not enough data | 

#### Data Updates

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Historical Snapshots** | Not enough data | 8.6 (46 reviews) | Not enough data | Not enough data | 
| **Real-Time Updating** | Not enough data | 8.7 (54 reviews) | Not enough data | Not enough data | 

#### Collaboration

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Sharing** | Not enough data | 8.6 (49 reviews) | Not enough data | Not enough data | 
| **Co-Editing** | Not enough data | 8.5 (43 reviews) | Not enough data | Not enough data | 
| **Devices** | Not enough data | 8.1 (47 reviews) | Not enough data | Not enough data | 

#### Data Updates

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Historical Snapshots** | Not enough data | 8.6 (44 reviews) | Not enough data | Not enough data | 
| **Real-Time Updating** | Not enough data | 8.7 (50 reviews) | Not enough data | Not enough data | 
| **Email Reports** | Not enough data | 8.3 (46 reviews) | Not enough data | Not enough data | 

### Data Warehouse

| Product | Score | Reviews |
|---|---|---|
| **IBM Db2** | 8.2/10 | 63 |
| **MongoDB Atlas** | N/A | N/A |
| **Amazon Relational Database Service (RDS)** | N/A | N/A |
| **PostgreSQL** | N/A | N/A |

#### Data Management

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Data Integration** | 8.6 (52 reviews) ✓ Verified | Not enough data | Not enough data | Not enough data | 
| **Data Compression** | 8.1 (48 reviews) ✓ Verified | Not enough data | Not enough data | Not enough data | 
| **Data Quality** | 8.6 (49 reviews) ✓ Verified | Not enough data | Not enough data | Not enough data | 
| **Built-In Data Analytics** | 8.2 (48 reviews) ✓ Verified | Not enough data | Not enough data | Not enough data | 
| **In-Database Machine Learning** | 7.5 (34 reviews) ✓ Verified | Not enough data | Not enough data | Not enough data | 
| **Data Lake Analytics** | 7.6 (34 reviews) ✓ Verified | Not enough data | Not enough data | Not enough data | 

#### Integration

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **AI/ ML Integration** | 7.8 (43 reviews) ✓ Verified | Not enough data | Not enough data | Not enough data | 
| **BI Tool Integration** | 8.1 (45 reviews) ✓ Verified | Not enough data | Not enough data | Not enough data | 
| **Data lake Integration** | 8.1 (42 reviews) ✓ Verified | Not enough data | Not enough data | Not enough data | 

#### Deployment

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **On-Premise** | 8.4 (50 reviews) ✓ Verified | Not enough data | Not enough data | Not enough data | 
| **Cloud** | 7.8 (41 reviews) ✓ Verified | Not enough data | Not enough data | Not enough data | 

#### Performance 

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Scalability** | 8.6 (51 reviews) ✓ Verified | Not enough data | Not enough data | Not enough data | 

#### Security

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Data Governance** | 8.7 (46 reviews) ✓ Verified | Not enough data | Not enough data | Not enough data | 
| **Data Security** | 9.0 (35 reviews) ✓ Verified | Not enough data | Not enough data | Not enough data | 

#### Generative AI

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **AI Text Generation** | 8.3 (8 reviews) | Not enough data | Not enough data | Not enough data | 
| **AI Text Summarization** | 8.3 (8 reviews) | Not enough data | Not enough data | Not enough data | 

### Relational Databases

| Product | Score | Reviews |
|---|---|---|
| **IBM Db2** | 8.5/10 | 370 |
| **MongoDB Atlas** | N/A | N/A |
| **Amazon Relational Database Service (RDS)** | 8.8/10 | 468 |
| **PostgreSQL** | 8.9/10 | 517 |

#### Management 

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Data Schema** | 8.6 (60 reviews) | Not enough data | 8.8 (306 reviews) | 9.1 (126 reviews) | 
| **Query Language** | 8.4 (62 reviews) | Not enough data | 8.9 (310 reviews) | 9.1 (123 reviews) | 
| **ACID - Complaint** | 8.2 (52 reviews) | Not enough data | 8.8 (295 reviews) | 9.2 (114 reviews) | 
| **Data Replication** | 8.5 (55 reviews) | Not enough data | 8.9 (304 reviews) | 8.9 (114 reviews) | 

#### Support 

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Text Search** | 8.0 (57 reviews) | Not enough data | 8.3 (300 reviews) | 8.7 (116 reviews) | 
| **Data Types** | 8.4 (60 reviews) | Not enough data | 8.7 (312 reviews) | 9.2 (131 reviews) | 
| **Languages** | 7.9 (60 reviews) | Not enough data | 8.6 (306 reviews) | 9.1 (113 reviews) | 
| **Operating Systems** | 8.4 (61 reviews) | Not enough data | 8.8 (310 reviews) | 9.1 (117 reviews) | 

#### Security

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Database Locking** | 8.5 (60 reviews) | Not enough data | 8.6 (299 reviews) | 8.7 (118 reviews) | 
| **Access Control** | 8.8 (60 reviews) | Not enough data | 8.7 (315 reviews) | 9.0 (120 reviews) | 
| **Encryption** | 8.4 (58 reviews) | Not enough data | 8.9 (309 reviews) | 8.7 (111 reviews) | 
| **Authentication** | 8.4 (56 reviews) | Not enough data | 8.8 (312 reviews) | 8.9 (114 reviews) | 

#### Performance 

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Disaster Recovery** | 8.6 (62 reviews) | Not enough data | 8.8 (305 reviews) | 8.6 (108 reviews) | 
| **Data Concurrency** | 8.6 (58 reviews) | Not enough data | 8.6 (299 reviews) | 8.8 (117 reviews) | 
| **Workload Management** | 8.5 (56 reviews) | Not enough data | 8.7 (307 reviews) | 8.7 (110 reviews) | 
| **Advanced Indexing** | 8.4 (57 reviews) | Not enough data | 8.5 (293 reviews) | 8.7 (117 reviews) | 
| **Query Optimizer** | 8.4 (57 reviews) | Not enough data | 8.5 (297 reviews) | 8.6 (115 reviews) | 

#### Database Features

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Storage** | 8.7 (306 reviews) | Not enough data | 9.0 (438 reviews) | 9.0 (465 reviews) | 
| **Availability** | 8.8 (309 reviews) | Not enough data | 9.2 (438 reviews) | 9.0 (471 reviews) | 
| **Stability** | 8.8 (309 reviews) | Not enough data | 9.0 (435 reviews) | 9.0 (478 reviews) | 
| **Scalability** | 8.4 (304 reviews) | Not enough data | 9.2 (425 reviews) | 8.6 (460 reviews) | 
| **Security** | 8.8 (302 reviews) | Not enough data | 9.1 (432 reviews) | 8.7 (445 reviews) | 
| **Data Manipulation** | 8.4 (303 reviews) | Not enough data | 8.5 (403 reviews) | 8.8 (459 reviews) | 
| **Query Language** | 8.4 (308 reviews) | Not enough data | 8.8 (420 reviews) | 9.0 (469 reviews) | 

### Document Databases

| Product | Score | Reviews |
|---|---|---|
| **IBM Db2** | N/A | N/A |
| **MongoDB Atlas** | 8.9/10 | 62 |
| **Amazon Relational Database Service (RDS)** | N/A | N/A |
| **PostgreSQL** | N/A | N/A |

#### Data Management

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Data Model** | Not enough data | 9.2 (57 reviews) | Not enough data | Not enough data | 
| **Data Types** | Not enough data | 9.3 (56 reviews) | Not enough data | Not enough data | 
| **Built - In Search** | Not enough data | 8.6 (54 reviews) | Not enough data | Not enough data | 
| **Event Triggers** | Not enough data | 8.7 (50 reviews) | Not enough data | Not enough data | 

#### Availability

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Auto Sharding** | Not enough data | 8.9 (48 reviews) | Not enough data | Not enough data | 
| **Auto Recovery** | Not enough data | 8.6 (49 reviews) | Not enough data | Not enough data | 
| **Data Replication** | Not enough data | 9.0 (52 reviews) | Not enough data | Not enough data | 

#### Performance

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Query Optimization** | Not enough data | 8.5 (55 reviews) | Not enough data | Not enough data | 

#### Security

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Role-Based Authorization** | Not enough data | 9.0 (55 reviews) | Not enough data | Not enough data | 
| **Authentication** | Not enough data | 9.2 (56 reviews) | Not enough data | Not enough data | 
| **Audit Logs** | Not enough data | 8.8 (51 reviews) | Not enough data | Not enough data | 
| **Encryption** | Not enough data | 9.0 (53 reviews) | Not enough data | Not enough data | 

#### Support

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Multi-Model** | Not enough data | 8.5 (52 reviews) | Not enough data | Not enough data | 
| **Operating Systems** | Not enough data | 9.2 (50 reviews) | Not enough data | Not enough data | 
| **BI Connectors** | Not enough data | 8.7 (40 reviews) | Not enough data | Not enough data | 

### Data Warehouse Automation

| Product | Score | Reviews |
|---|---|---|
| **IBM Db2** | 8.0/10 | 11 |
| **MongoDB Atlas** | N/A | N/A |
| **Amazon Relational Database Service (RDS)** | N/A | N/A |
| **PostgreSQL** | N/A | N/A |

#### Automation

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Workflow Automation** | 8.3 (9 reviews) | Not enough data | Not enough data | Not enough data | 
| **Multi-platform support** | 8.1 (9 reviews) | Not enough data | Not enough data | Not enough data | 
| **Data Management** | 8.3 (9 reviews) | Not enough data | Not enough data | Not enough data | 
| **Data Simplicity** | 8.5 (9 reviews) | Not enough data | Not enough data | Not enough data | 

#### Functionality

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Documentation management** | 7.4 (9 reviews) | Not enough data | Not enough data | Not enough data | 
| **Platform support** | 8.1 (9 reviews) | Not enough data | Not enough data | Not enough data | 
| **Template functionality** | 8.0 (9 reviews) | Not enough data | Not enough data | Not enough data | 

#### Administration

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Error Alerts** | 8.3 (8 reviews) | Not enough data | Not enough data | Not enough data | 
| **Service Automation** | 7.7 (8 reviews) | Not enough data | Not enough data | Not enough data | 
| **Workflow management** | 7.7 (8 reviews) | Not enough data | Not enough data | Not enough data | 

#### Agentic AI - Data Warehouse Automation

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Proactive Assistance** | Not enough data | Not enough data | Not enough data | Not enough data | 

### Database as a Service (DBaaS)

| Product | Score | Reviews |
|---|---|---|
| **IBM Db2** | 8.7/10 | 78 |
| **MongoDB Atlas** | 8.8/10 | 162 |
| **Amazon Relational Database Service (RDS)** | 8.7/10 | 281 |
| **PostgreSQL** | N/A | N/A |

#### Configuration

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Application Performance** | 8.5 (65 reviews) | 9.2 (136 reviews) | 8.8 (247 reviews) | Not enough data | 
| **Orchestration** | 8.1 (60 reviews) | 8.5 (118 reviews) | 8.4 (242 reviews) | Not enough data | 
| **Database Monitoring** | 8.5 (66 reviews) | 9.0 (130 reviews) | 8.6 (251 reviews) | Not enough data | 
| **Anomaly Detection** | 8.3 (61 reviews) | 8.3 (110 reviews) | 8.1 (227 reviews) | Not enough data | 
| **Network Security** | 8.6 (62 reviews) | 8.9 (123 reviews) | 8.9 (244 reviews) | Not enough data | 

#### Database Administration

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Provisioning** | 8.6 (60 reviews) | 8.8 (126 reviews) | 8.8 (242 reviews) | Not enough data | 
| **Governance** | 8.8 (60 reviews) | 8.8 (117 reviews) | 8.6 (232 reviews) | Not enough data | 
| **Auditing** | 8.8 (59 reviews) | 8.6 (111 reviews) | Feature Not Available | Not enough data | 

#### Availability

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Scalability** | 8.9 (63 reviews) | 9.2 (129 reviews) | 9.1 (249 reviews) | Not enough data | 
| **Backup** | 9.1 (62 reviews) | 8.8 (126 reviews) | 9.1 (252 reviews) | Not enough data | 
| **Archiving** | 8.8 (63 reviews) | 8.5 (113 reviews) | Feature Not Available | Not enough data | 
| **Indexing** | 8.9 (63 reviews) | 9.0 (128 reviews) | 8.7 (232 reviews) | Not enough data | 

#### Security

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Data Masking** | 8.4 (41 reviews) | 8.7 (74 reviews) | 8.3 (170 reviews) | Not enough data | 
| **Authentication And Single Sign-On** | 8.8 (42 reviews) | 9.0 (81 reviews) | 8.6 (181 reviews) | Not enough data | 
| **Data Anonymization** | 8.8 (41 reviews) | 8.7 (72 reviews) | 8.4 (170 reviews) | Not enough data | 

#### Data Management

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Data Replication** | 8.7 (45 reviews) | 8.7 (79 reviews) | 8.8 (188 reviews) | Not enough data | 
| **Advanced Data Analytics** | 8.6 (44 reviews) | 8.8 (68 reviews) | 8.6 (175 reviews) | Not enough data | 

### NoSQL Databases

| Product | Score | Reviews |
|---|---|---|
| **IBM Db2** | 8.7/10 | 366 |
| **MongoDB Atlas** | N/A | N/A |
| **Amazon Relational Database Service (RDS)** | N/A | N/A |
| **PostgreSQL** | N/A | N/A |

#### Database Features

| Feature | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Storage** | 8.7 (306 reviews) | Not enough data | 9.0 (438 reviews) | 9.0 (465 reviews) | 
| **Availability** | 8.8 (309 reviews) | Not enough data | 9.2 (438 reviews) | 9.0 (471 reviews) | 
| **Stability** | 8.8 (309 reviews) | Not enough data | 9.0 (435 reviews) | 9.0 (478 reviews) | 
| **Scalability** | 8.4 (304 reviews) | Not enough data | 9.2 (425 reviews) | 8.6 (460 reviews) | 
| **Security** | 8.8 (302 reviews) | Not enough data | 9.1 (432 reviews) | 8.7 (445 reviews) | 
| **Data Manipulation** | 8.4 (303 reviews) | Not enough data | 8.5 (403 reviews) | 8.8 (459 reviews) | 
| **Query Language** | 8.4 (308 reviews) | Not enough data | 8.8 (420 reviews) | 9.0 (469 reviews) | 

---
## Categories

**Unique to IBM Db2 (6):** [Relational Databases](https://www.g2.com/categories/relational-databases), [Data Warehouse Solutions](https://www.g2.com/categories/data-warehouse), [Object-Oriented Databases](https://www.g2.com/categories/object-oriented-databases), [XML Databases](https://www.g2.com/categories/xml-databases), [Database as a Service (DBaaS) Providers](https://www.g2.com/categories/database-as-a-service-dbaas), [Data Warehouse Automation Software](https://www.g2.com/categories/data-warehouse-automation)

**Unique to MongoDB Atlas (3):** [Database as a Service (DBaaS) Providers](https://www.g2.com/categories/database-as-a-service-dbaas), [Document Databases](https://www.g2.com/categories/document-databases), [Data Visualization Tools](https://www.g2.com/categories/data-visualization-tools)

**Unique to Amazon Relational Database Service (RDS) (2):** [Database as a Service (DBaaS) Providers](https://www.g2.com/categories/database-as-a-service-dbaas), [Relational Databases](https://www.g2.com/categories/relational-databases)

**Unique to PostgreSQL (1):** [Relational Databases](https://www.g2.com/categories/relational-databases)


---
## Reviewer Demographics

### By Company Size

| Segment | IBM Db2 | MongoDB Atlas | Amazon Relational Database Service (RDS) | PostgreSQL | 
|---|---|---|---|---|
| **Small-Business** | 13.6% | 57.9% | 29.0% | 35.9% | 
| **Mid-Market** | 20.4% | 25.1% | 37.7% | 34.2% | 
| **Enterprise** | 66.0% | 17.0% | 33.4% | 29.8% | 

### By Industry

#### IBM Db2

- **Information Technology and Services:** 21.6%
- **Banking:** 11.7%
- **Computer Software:** 10.1%
- **Financial Services:** 7.2%
- **Insurance:** 5.9%
- **Retail:** 4.7%
- **Hospital & Health Care:** 3.7%
- **Government Administration:** 3.5%
- **Automotive:** 2.2%
- **Transportation/Trucking/Railroad:** 1.8%
- **Other:** 27.6%

#### MongoDB Atlas

- **Computer Software:** 30.0%
- **Information Technology and Services:** 21.9%
- **Higher Education:** 4.0%
- **Education Management:** 4.0%
- **Financial Services:** 3.2%
- **Consumer Services:** 2.0%
- **Telecommunications:** 1.7%
- **Internet:** 1.4%
- **Insurance:** 1.4%
- **Marketing and Advertising:** 1.4%
- **Other:** 28.8%

#### Amazon Relational Database Service (RDS)

- **Information Technology and Services:** 22.6%
- **Computer Software:** 17.0%
- **Financial Services:** 6.0%
- **Computer & Network Security:** 3.7%
- **Telecommunications:** 3.2%
- **Hospital & Health Care:** 3.1%
- **Health, Wellness and Fitness:** 2.7%
- **Banking:** 2.5%
- **Retail:** 2.4%
- **Internet:** 2.2%
- **Other:** 34.4%

#### PostgreSQL

- **Information Technology and Services:** 27.5%
- **Computer Software:** 23.0%
- **Internet:** 4.2%
- **Financial Services:** 4.1%
- **Telecommunications:** 2.8%
- **Hospital & Health Care:** 2.8%
- **Higher Education:** 2.7%
- **Computer & Network Security:** 2.2%
- **Retail:** 2.0%
- **Marketing and Advertising:** 2.0%
- **Other:** 26.6%

---
## Alternatives

### Alternatives to IBM Db2

- [Oracle Database](https://www.g2.com/products/oracle-database/reviews) — 4.3/5 stars (1010 reviews)
- [SAP HANA Cloud](https://www.g2.com/products/sap-hana-cloud-2025-10-01/reviews) — 4.3/5 stars (621 reviews)
- [Teradata Vantage](https://www.g2.com/products/teradata-teradata-vantage/reviews) — 4.3/5 stars (375 reviews)
- [Microsoft SQL Server](https://www.g2.com/products/microsoft-sql-server/reviews) — 4.4/5 stars (2280 reviews)
- [MySQL](https://www.g2.com/products/mysql/reviews) — 4.4/5 stars (1675 reviews)
- [Google Cloud BigQuery](https://www.g2.com/products/google-cloud-bigquery/reviews) — 4.5/5 stars (1227 reviews)
- [Snowflake](https://www.g2.com/products/snowflake/reviews) — 4.6/5 stars (754 reviews)
- [Amazon Redshift](https://www.g2.com/products/amazon-redshift/reviews) — 4.3/5 stars (402 reviews)
- [Amazon Aurora](https://www.g2.com/products/amazon-aurora/reviews) — 4.5/5 stars (457 reviews)
- [Google Cloud SQL](https://www.g2.com/products/google-cloud-sql/reviews) — 4.5/5 stars (366 reviews)

### Alternatives to MongoDB Atlas

- [Amazon DynamoDB](https://www.g2.com/products/amazon-web-services-aws-amazon-dynamodb/reviews) — 4.4/5 stars (530 reviews)
- [Google Cloud Firestore](https://www.g2.com/products/google-cloud-firestore/reviews) — 4.2/5 stars (97 reviews)
- [Azure Cosmos DB](https://www.g2.com/products/azure-cosmos-db/reviews) — 4.2/5 stars (68 reviews)
- [Amazon DocumentDB](https://www.g2.com/products/amazon-documentdb/reviews) — 4.3/5 stars (44 reviews)
- [DigitalOcean](https://www.g2.com/products/digitalocean/reviews) — 4.6/5 stars (749 reviews)
- [Amazon Aurora](https://www.g2.com/products/amazon-aurora/reviews) — 4.5/5 stars (457 reviews)
- [Google Cloud SQL](https://www.g2.com/products/google-cloud-sql/reviews) — 4.5/5 stars (366 reviews)
- [Azure SQL Database](https://www.g2.com/products/azure-sql-database/reviews) — 4.5/5 stars (241 reviews)
- [Oracle Database](https://www.g2.com/products/oracle-database/reviews) — 4.3/5 stars (1010 reviews)
- [Google Cloud BigTable](https://www.g2.com/products/google-cloud-bigtable/reviews) — 4.4/5 stars (41 reviews)

### Alternatives to Amazon Relational Database Service (RDS)

- [Oracle Database](https://www.g2.com/products/oracle-database/reviews) — 4.3/5 stars (1010 reviews)
- [SAP HANA Cloud](https://www.g2.com/products/sap-hana-cloud-2025-10-01/reviews) — 4.3/5 stars (621 reviews)
- [Google Cloud SQL](https://www.g2.com/products/google-cloud-sql/reviews) — 4.5/5 stars (366 reviews)
- [Azure SQL Database](https://www.g2.com/products/azure-sql-database/reviews) — 4.5/5 stars (241 reviews)
- [EDB Postgres Advanced Server](https://www.g2.com/products/edb-postgres-advanced-server/reviews) — 4.5/5 stars (37 reviews)
- [Microsoft SQL Server](https://www.g2.com/products/microsoft-sql-server/reviews) — 4.4/5 stars (2280 reviews)
- [MySQL](https://www.g2.com/products/mysql/reviews) — 4.4/5 stars (1675 reviews)
- [DigitalOcean](https://www.g2.com/products/digitalocean/reviews) — 4.6/5 stars (749 reviews)
- [SQLite](https://www.g2.com/products/sqlite/reviews) — 4.3/5 stars (260 reviews)
- [MariaDB](https://www.g2.com/products/mariadb/reviews) — 4.4/5 stars (226 reviews)

### Alternatives to PostgreSQL

- [Microsoft SQL Server](https://www.g2.com/products/microsoft-sql-server/reviews) — 4.4/5 stars (2280 reviews)
- [MySQL](https://www.g2.com/products/mysql/reviews) — 4.4/5 stars (1675 reviews)
- [Oracle Database](https://www.g2.com/products/oracle-database/reviews) — 4.3/5 stars (1010 reviews)
- [SAP HANA Cloud](https://www.g2.com/products/sap-hana-cloud-2025-10-01/reviews) — 4.3/5 stars (621 reviews)
- [Teradata Vantage](https://www.g2.com/products/teradata-teradata-vantage/reviews) — 4.3/5 stars (375 reviews)
- [SQLite](https://www.g2.com/products/sqlite/reviews) — 4.3/5 stars (260 reviews)
- [Azure SQL Database](https://www.g2.com/products/azure-sql-database/reviews) — 4.5/5 stars (241 reviews)
- [MariaDB](https://www.g2.com/products/mariadb/reviews) — 4.4/5 stars (226 reviews)
- [Google Cloud SQL](https://www.g2.com/products/google-cloud-sql/reviews) — 4.5/5 stars (366 reviews)
- [IBM Informix](https://www.g2.com/products/ibm-informix/reviews) — 4.5/5 stars (111 reviews)

---
## Top Discussions

### IBM Db2

- Title: [Where can I find answers to other questions I may have?](https://www.g2.com/discussions/faqs-6eb88878-1fbd-4fb6-aea7-4134624eebc7) — 2 comments, 1 upvote *(includes official response)*
  > **Top comment:** "Please visit: https://developer.ibm.com/answers/questions/436870/common-questions-about-the-db2-on-cloud-free-plan/"
- Title: [What is IBM Db2 used for?](https://www.g2.com/discussions/what-is-ibm-db2-used-for) — 1 comment
  > **Top comment:** "It is a name of the database which is used in IBM I system."
- Title: [What does Ibm Dashdb do?](https://www.g2.com/discussions/what-does-ibm-dashdb-do) — 1 comment
  > **Top comment:** "IBM dashDB is a fully managed in-memory cloud data warehousing service for developers, database administrators, business analysts, data scientists and more."
- Title: [What is IBM doing to facilitate connections with Db2 and cloud platforms of their own?](https://www.g2.com/discussions/what-is-ibm-doing-to-facilitate-connections-with-db2-and-cloud-platforms-of-their-own) — 1 comment, 1 upvote
  > **Top comment:** "IBM is changing the SQL model internal to the DB2 platform, allowing all databases that utilize query tools like Python, SQL, etc. to utilize ALL commands..."
- Title: [Which tool do you use for deep monitoring of IBM DB2 databases (instances) ?](https://www.g2.com/discussions/which-tool-do-you-use-for-deep-monitoring-of-ibm-db2-databases-instances) — 1 comment, 1 upvote
  > **Top comment:** "Maxim, we have a dedicated management console that comes free with Db2. It was called Data Server Manager in the past, now we call it the Unified Management..."

### MongoDB Atlas

- Title: [can we axpect more feature available to students as developerss it would be verry helpful](https://www.g2.com/discussions/can-we-axpect-more-feature-available-to-students-as-developerss-it-would-be-verry-helpful) — 4 comments, 1 upvote
  > **Top comment:** "yes."
- Title: [Is MongoDB Atlas free?](https://www.g2.com/discussions/is-mongodb-atlas-free) — 3 comments
  > **Top comment:** "No it's not free - it's MongoDB's end to end management service "
- Title: [What is the difference between MongoDB and Mongodb Atlas?](https://www.g2.com/discussions/what-is-the-difference-between-mongodb-and-mongodb-atlas) — 2 comments
  > **Top comment:** "MongoDB is the Database only.  You can run MongoDB in your machine or in a server, but you would need to manage it. 
MongoDB Atlas is the Database as a..."
- Title: [How does MongoDB Atlas handle backups?](https://www.g2.com/discussions/backups) — 2 comments, 1 upvote *(includes official response)*
  > **Top comment:** "Continuous Backup:

MongoDB Atlas continuously backs up your data, ensuring your backups are just a few seconds behind the operational system. The platform..."
- Title: [What scale does MongoDB Atlas support?](https://www.g2.com/discussions/scalability-6bf8928f-a43e-41fa-a268-080310558f58) — 2 comments, 1 upvote *(includes official response)*
  > **Top comment:** "MongoDB is one of the most scalable databases on the planet, and MongoDB Atlas brings you that same scalability, but with us managing it for you:

You can..."

### Amazon Relational Database Service (RDS)

- Title: [What is Amazon Relational Database Service (RDS) used for?](https://www.g2.com/discussions/what-is-amazon-relational-database-service-rds-used-for) — 2 comments, 2 upvotes
  > **Top comment:** "Amazon Relational Database Service (RDS) is a cloud-based service offered by Amazon Web Services (AWS) that is used for managing and operating relational..."
- Title: [An Amazon RDS performance best practice is to allocate enough RAM so that your working set resides almost completely in memory.](https://www.g2.com/discussions/an-amazon-rds-performance-best-practice-is-to-allocate-enough-ram-so-that-your-working-set-resides-almost-completely-in-memory) — 1 comment, 1 upvote
  > **Top comment:** "nice"

### PostgreSQL

- Title: [What are the advantages and disadvantages of PostgreSQL?](https://www.g2.com/discussions/what-are-the-advantages-and-disadvantages-of-postgresql) — 2 comments
  > **Top comment:** "Advantages: A different resource for your SQL needs without the tag of a legacy system"
- Title: [What is PostgreSQL used for?](https://www.g2.com/discussions/what-is-postgresql-used-for) — 1 comment
  > **Top comment:** "PostgreSQL is an open-source database used to store, manage, and retrieve data. It's known for its reliability, scalability, and support for complex queries,..."
- Title: [What is special about PostgreSQL?](https://www.g2.com/discussions/what-is-special-about-postgresql) — 1 comment
  > **Top comment:** "Provides features like scalability, reliability, and provides security which makes PostgreSQL more special.   "
- Title: [What programs use PostgreSQL?](https://www.g2.com/discussions/what-programs-use-postgresql) — 1 comment
  > **Top comment:** "SQL"
- Title: [Can we get some video tutorials on usage? Also how do we connect them over cloud ?](https://www.g2.com/discussions/can-we-get-some-video-tutorials-on-usage-also-how-do-we-connect-them-over-cloud) — 1 comment, 1 upvote
  > **Top comment:** "Hey Jay,

We use Postgresql on all of our cloud servers. We connect via SSL connections to the specific..."

---
**Source:** [G2.com](https://www.g2.com) | [Comparison Page](https://www.g2.com/compare/ibm-db2-vs-mongodb-atlas-vs-amazon-relational-database-service-rds-vs-postgresql)