Updated for 2026
Redisvs
MongoDB
Not sure which fits your workflow in 2026? Compare pricing, features, and trade-offs — then switch tools below to explore more options in this category.
dev-database
Redis
Redis is the default in-memory data platform for caching, sessions, pub/sub, and low-latency application state.
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MongoDB
MongoDB is a document-oriented database that stores BSON/JSON-like documents — strong for flexible schemas, change streams, and sharded clusters (self-host or Atlas).
Visit MongoDBBasics
| Feature | Redis | MongoDB |
|---|---|---|
| Released | 2009 | 2016 |
| Company | Redis Ltd. | MongoDB, Inc. |
| Country | United States | United States |
| Region / Availability | Self-host / multi-cloud | Self-host / multi-cloud |
Pricing comparison
| Plan | Redis | MongoDB |
|---|---|---|
| Model | open-source | freemium |
| Free tier | Yes | Yes |
| Starts at | $0/mo | $0/mo |
| Plan 1 | Open Source / CE: Free | Free: FreeLimited to 512MB storage, primarily for learning purposes. |
| Plan 2 | Redis Cloud: Usage-based | Flex: $30/moFor application development and testing, with on-demand burst capacity for unpredictable traffic. Limited to 5GB storeage. |
| Plan 3 | — | Dedicated: Starts at $57/moFor production applications with complex workloads. 10GB to 4TB storage, dedicated memory and CPU. |
Feature checklist
| Feature | Redis | MongoDB |
|---|---|---|
| Open Source | ✓https://github.com/redis/redis | ✓https://github.com/mongodb/mongo |
| Self-host Option | ✓ | ✓ |
| ACID | Atomic commands; MULTI/EXEC is not full RDBMS ACID | Document atomicity; multi-document ACID transactions (4.0+) |
| Index Support | Secondary indexes via Redis Query / RediSearch; sorted sets | Single, compound, text, geospatial, wildcard, and vector indexes |
| Concurrency | Very high ops/sec; single-threaded command execution per shard | High concurrency for document workloads with wiredTiger locking |
| Scalability | Cluster mode sharding + replicas | Native horizontal sharding and replica sets |
| SQL Support | ✗ | ✗ |
| Postgres Compatible | ✗ | ✗ |
| Serverless Database | ✗ | ✗ |
| Vector Search | ✓ | ✓ |
| Realtime | ✓ | ✓ |
| Built-in Auth | ✗ | ✗ |
| Blob / File Storage | ✗ | ✗ |
| Edge Compatible | ✓ | ✗ |
| AI SQL / NL Query | ✗ | ✗ |
| AI Schema Assist | ✗ | ✓ |
| AI Agent / MCP | ✗ | ✓ |
| Team Collaboration | ✓ | ✓ |
| Use Case | In-memory cache, sessions, queues, pub/sub, and real-time structures | Flexible document storage for product catalogs, content, and event-driven apps |
Pros & cons
Redis
- Extremely fast in-memory performance
- Versatile data structures for caching and queues
- Wide client and cloud hosting ecosystem
- Not a primary relational system of record
- Memory cost and persistence trade-offs
- Licensing / product naming has evolved
MongoDB
- Document model flexibility
- Strong Atlas developer tooling
- Vector search and multi-cloud options
- Not relational SQL
- Cost management needs care at scale
- Auth/storage not as turnkey as BaaS suites
Dimension scores
Editorial 0–10 scores across shared dimensions — higher is better for that axis.
| Dimension | Redis | MongoDB |
|---|---|---|
| Capability | 8.8 | 8.5 |
| Privacy | 8.5 | 6.0 |
| Value | 9.0 | 7.0 |
| Depth | 8.0 | 8.5 |
| Ecosystem | 9.5 | 9.0 |
| DX | 8.5 | 7.5 |
- Redis
- MongoDB
FAQ
Is Redis better than MongoDB?
It depends on workflow. Redis emphasizes in-memory data store used for caching, queues, sessions, and real-time structures. MongoDB emphasizes document database for flexible json-like data, rich indexing, and horizontal scale. Use the feature checklist above for your stack.
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Related alternatives
Disclaimer:Not Financial or Investment Advice, Educational/Dev Tool Comparison Only. Information may change; always verify pricing on the vendor site before purchasing.