Amazon OpenSearch vs Redis Vector
Comparing AWS search service with in-memory vector capabilities in 2025
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Amazon OpenSearch
Amazon Web Services
Redis Vector
Redis Inc.
Quick Comparison
| Feature | Amazon OpenSearch | Redis Vector |
|---|---|---|
| Type | Managed Search Service | In-Memory Database + Vector |
| Best For | AWS Enterprise Search | Real-time Applications |
| Primary Strength | Hybrid Search | Sub-ms Latency |
| Deployment | AWS Cloud | Any Infrastructure |
| Learning Curve | Steep | Moderate |
Amazon OpenSearch
Amazon Web Services
✓ Strengths
- • AWS ecosystem integration
- • Hybrid text + vector search
- • Mature platform
- • Enterprise features
- • Global availability
✗ Limitations
- • Not vector-optimized
- • Complex configuration
- • No GPU support
- • Higher learning curve
🎯 Best For
- • AWS-native applications
- • Hybrid search needs
- • Log analytics + vectors
- • Enterprise deployments
Redis Vector
Redis Inc.
✓ Strengths
- • Sub-millisecond latency
- • Cache + vector combo
- • Mature ecosystem
- • Simple operations
- • Real-time performance
✗ Limitations
- • Memory constraints
- • Limited to HNSW
- • No GPU support
- • Expensive at scale
🎯 Best For
- • Real-time applications
- • Small-medium datasets
- • Cache + search combo
- • Low latency needs
Performance Analysis
Query Latency
Scalability
When to Choose Each
Choose Amazon OpenSearch if:
- You need both text search and vector search in one platform
- Your application is already built on AWS infrastructure
- You're doing log analytics with vector-enhanced search
- Enterprise features and support are critical
Choose Redis Vector if:
- Sub-millisecond latency is absolutely critical
- You need caching and vector search in one system
- Your dataset fits comfortably in memory
- You already use Redis in your architecture
Cost Considerations
Amazon OpenSearch
Pricing varies by instance type and region. Additional costs for data transfer and snapshots.
Redis Vector
Redis Cloud pricing based on memory usage. Self-hosted provides cost control but requires management.
Our Recommendation
Choose Amazon OpenSearch if you need a comprehensive search platform that combines text and vector search, especially for AWS-native applications with enterprise requirements.
Choose Redis Vector if you prioritize ultra-low latency and want to combine caching with vector search, particularly for real-time applications with memory-sized datasets.