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Updated yesterday · Independent Analysis
PostgreSQL vs Redis
Capability Overview
PostgreSQLvs Redis
4.4G2-0.1 vs Redis
Only in PostgreSQL
- ✦ ACID Transactions
- ✦ Advanced SQL
- ✦ JSON/JSONB Support
✓ Free planMost popular users · est. 1996
Redisvs PostgreSQL
4.5G2+0.1 vs PostgreSQL
Only in Redis
- ✦ In-Memory Storage
- ✦ Persistent Storage (RDB/AOF)
- ✦ Pub/Sub Messaging
✓ Free planFrom $5/mo10M+ users · est. 2009
Quick VerdictIndependent Analysis
PostgreSQL wins for structured, high-volume relational data storage with its free open-source deployment. Redis wins for low-latency caching architectures starting at $7/mo.
When to Choose PostgreSQL vs Redis
The question that matters: “In what situation will I regret choosing A over B after 3 months?”
PostgreSQL Unique Strength
JSONB Indexing for Flexible Schema Without NoSQL Migration
PostgreSQL's JSONB with GIN indexes stores semi-structured data in relational tables and queries nested keys at under 5ms, avoiding a full NoSQL migration for use cases that need occasional schema flexibility.
→ Choose PostgreSQL if this scenario applies to you. Redis doesn't offer a comparable solution.
PostgreSQL Unique Strength
Table Partitioning Cuts Time-Series Query Time by 90%
Declarative partitioning splits large time-series tables into monthly partitions, cutting query scan time by 90% for date-range queries that previously scanned billions of rows.
→ Choose PostgreSQL if this scenario applies to you. Redis doesn't offer a comparable solution.
PostgreSQL Unique Strength
Logical Replication for Zero-Downtime Migration
Logical replication syncs a live production database to a new instance in real time, enabling a migration cutover measured in seconds rather than the hours a pg_dump/restore requires.
→ Choose PostgreSQL if this scenario applies to you. Redis doesn't offer a comparable solution.
Redis Unique Strength
Session Store With Sub-Millisecond Read Latency
Redis stores user session data with consistent sub-millisecond GET operations, handling 100K+ requests per second with a single instance where a database session store would create a bottleneck.
→ Choose Redis if this scenario applies to you. PostgreSQL doesn't offer a comparable solution.
Redis Unique Strength
Rate Limiting via Redis Sliding Window Counter
Redis INCR with EXPIRE implements sliding window rate limiting in 2 lines of code, enforcing per-user API quotas without adding a separate rate limiting service.
→ Choose Redis if this scenario applies to you. PostgreSQL doesn't offer a comparable solution.
Redis Unique Strength
Pub/Sub Fan-Out for Real-Time Notification Delivery
Redis Pub/Sub broadcasts events to thousands of connected subscribers in under 1ms, enabling real-time dashboards or notifications without polling the database.
→ Choose Redis if this scenario applies to you. PostgreSQL doesn't offer a comparable solution.
Pricing Comparison & PlansHigh· Verified Jun 28, 2026
PostgreSQL Plans
Free tier available
Redis Plans
Free tier available
Open Source (Self-Hosted)
Open SourceBest for: Good for developers wanting full control and no cost
- ✓Self-managed deployment
- ✓Access to Redis source code
- ✓Community support
- ✓Flexible deployment options
- ✓Full control over infrastructure
View on vendor site
MOST POPULARFree
FreeBest for: Development / getting started
- ✓30 MB database size
- ✓Up to 30 concurrent connections
- ✓1 CIDR allow rule
- ✓5 GB monthly total network bandwidth
- ✓Up to 100 ops/sec throughput
View on vendor site
Essentials
$5/moBest for: Small production / cost-conscious
- ✓Cost-efficient for low-throughput scenarios
- ✓Scales by memory size
- ✓High availability options
- ✓Daily and instant backups
- ✓Increased storage and reliability for production
View on vendor site
Pro
$200/moBest for: Dedicated production workloads
- ✓Dedicated VPC infrastructure
- ✓Multi-AZ high availability (optional)
- ✓99.999% uptime SLA
- ✓Active-Active replication (up to 10 regions)
- ✓Automatic hot/cold data separation (Auto-tiering)
View on vendor site
Enterprise Software
Contact SalesBest for: Designed for large organizations with complex needs and specific requirements
- ✓Designed for enterprise multi-region deployments
- ✓Advanced cost management with Flash/Auto-Tiering at scale
- ✓Customizable solutions
- ✓Direct sales engagement
- ✓Tailored support and services
View on vendor site
Capability Breakdown
5 differences found across 10 standardized features
Feature
PostgreSQL
Redis
ACID Transactions
✓
✗
Horizontal Scaling
✗
✓
Time Series
✗
✓
Multi-Model
✗
✓
Serverless
✓
✗
Total (raw)
20
20
PostgreSQL Features
- •ACID Transactions
- •Advanced SQL
- •JSON/JSONB Support
- •Full-Text Search
- •Table Partitioning
- •Foreign Data Wrappers
- •Logical Replication
- •Point-in-Time Recovery
- •Row-Level Security
- •Extensions (pgvector, PostGIS, TimescaleDB)
- •Parallel Queries
- •Window Functions
- •MVCC Architecture
- •Stored Procedures (PL/pgSQL)
- •Streaming Replication
- •Materialized Views
- •REST API
- •SDK
- •CLI
- •Connection Pooling
Redis Features
- •In-Memory Storage
- •Persistent Storage (RDB/AOF)
- •Pub/Sub Messaging
- •Streams
- •Sorted Sets / Lists / Hashes
- •Lua Scripting
- •Transactions (MULTI/EXEC)
- •Cluster Mode
- •Sentinel (HA)
- •Redis Search
- •Redis JSON
- •Redis Time Series
- •Redis Vector Similarity Search
- •Keyspace Notifications
- •TTL / Expiry
- •Replication
- •REST API
- •SDK
- •CLI
- •Connection Pooling
Strengths & Limitations
Evaluative strengths and weaknesses: not feature lists
Pros
- +Extensible architecture supports GIS, time-series, and vector data
- +ACID compliance and MVCC ensure high data integrity and concurrency
- +Advanced indexing (GIN, GiST, BRIN) accelerates complex queries
- +Rich data types including native JSONB, arrays, and range types
- +Mature, battle-tested reliability for mission-critical applications
Cons
- −Requires manual tuning for high-throughput, write-heavy workloads
- −Connection management can be resource-intensive at massive scale
- −No built-in horizontal scaling; requires third-party solutions
- −Vacuuming process can cause performance overhead on busy tables
- −Replication setup is more complex than some modern distributed DBs
Pros
- +Sub-millisecond latency: fastest data store for caching
- +Universal: supported by every framework and language
- +Rich data structures for real-time use cases
- +Redis Stack adds search, JSON, and vector capabilities
Cons
- −There are some points where I feel Redis can be improved.
- −There are a few areas where Redis could improve.
- −Redis could improve its efficiency in handling locally stored data, not just Amazon Cloud or Google Cloud.
- −Redis presents a single point of failure and lacks fault tolerance.
- −The product's main purpose is caching, even though the vendor says we can also use it as a persistent database.
At a Glance
User Rating
4.4/5vs4.5/5
PostgreSQL
Redis
▲
Starting Price
Pay-per-usevs$5/mo
PostgreSQL
Redis
▲
Feature Count
20 featuresvs20 features
PostgreSQL
Redis
User Base
0vs10.0M
PostgreSQL
Redis
▲
PostgreSQL · Price & Data SyncLast verified: June 28, 2026 · CE-DB-2026W22-D9B048 · No changes detected
Redis · Price & Data SyncLast verified: June 28, 2026 · CE-DB-2026W23-4AD738 · ✓ Pricing updated May 30, 2026
Recent Price History
Redis
Redis added a new "Free" plan at $0/mo (Free)
Plan added · May 30, 2026
Redis
Redis removed the "Redis Cloud Enterprise" plan
Plan removed · May 30, 2026
Redis
Redis added a new "Essentials" plan at $5/mo
Plan added · May 30, 2026
Redis
Redis removed the "Redis Cloud Fixed" plan
Plan removed · May 30, 2026
Redis
Redis removed the "Community Edition" plan
Plan removed · May 30, 2026
Frequently Asked Questions
Related Comparisons
PostgreSQLFree plan
RedisFree · from $5/moSources & Data Trail · PostgreSQL
- 1.Official Website·Official vendor website
- 2.G2·G2 verified reviews · 4.4/5 · 678 reviews
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Sources & Data Trail · Redis
- 1.Official Pricing Page·Source of verified tiers(Checked: 2026-06-28)
- 2.Official Website·Official vendor website
- 3.G2·G2 verified reviews · 4.5/5 · 134 reviews
- 4.Capterra·Capterra verified reviews · 4.6/5
- 5.TrustRadius·TrustRadius verified reviews
- 6.PeerSpot·PeerSpot enterprise peer reviews