Updated for 2026

RedisvsPostgreSQL

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.

Category
Tool A
Tool B

dev-database

Redis

Redis is the default in-memory data platform for caching, sessions, pub/sub, and low-latency application state.

Visit Redis

dev-database

PostgreSQL

PostgreSQL is the open-source relational database many modern stacks standardize on — powerful SQL, extensions, and a vast ecosystem.

Visit PostgreSQL

Basics

FeatureRedisPostgreSQL
Released20091996
CompanyRedis Ltd.PostgreSQL Global Development Group
CountryUnited StatesInternational
Region / AvailabilitySelf-host / multi-cloudSelf-host / multi-cloud

Pricing comparison

PlanRedisPostgreSQL
Modelopen-sourceopen-source
Free tierYesYes
Starts at$0/mo$0/mo
Plan 1Open Source / CE: FreeOpen Source: Free
Plan 2Redis Cloud: Usage-basedManaged clouds: Vendor pricingMany managed hosts available

Feature checklist

FeatureRedisPostgreSQL
Open Source✓https://github.com/redis/redis✓https://github.com/postgres/postgres
Self-host Option✓✓
ACIDAtomic commands; MULTI/EXEC is not full RDBMS ACIDFull ACID compliance
Index SupportSecondary indexes via Redis Query / RediSearch; sorted setsB-tree, Hash, GiST, GIN, BRIN, and extension indexes (e.g. vectors)
ConcurrencyVery high ops/sec; single-threaded command execution per shardExcellent MVCC for mixed read/write workloads
ScalabilityCluster mode sharding + replicasVertical scale + replicas; sharding via extensions/ops
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 CaseIn-memory cache, sessions, queues, pub/sub, and real-time structuresGeneral-purpose open-source relational database and extension hub

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

PostgreSQL

  • Gold-standard open-source SQL engine
  • Huge extension ecosystem (including vectors)
  • Foundation for many modern BaaS platforms
  • You assemble auth/storage yourself
  • Ops complexity grows without a managed host
  • Not a serverless product by itself

Dimension scores

Editorial 0–10 scores across shared dimensions — higher is better for that axis.

DimensionRedisPostgreSQL
Capability
8.8
9.2
Privacy
8.5
9.5
Value
9.0
9.5
Depth
8.0
9.5
Ecosystem
9.5
9.5
DX
8.5
8.0
CapabilityPrivacyValueDepthEcosystemDX
  • Redis
  • PostgreSQL

FAQ

Is Redis better than PostgreSQL? (2026)

It depends on workflow. Redis emphasizes in-memory data store used for caching, queues, sessions, and real-time structures. PostgreSQL emphasizes advanced open-source relational database with rich sql, extensions, and reliability. Use the feature checklist above for your stack.

Which use cases fit Redis vs PostgreSQL?
  • Redis: In-memory cache, sessions, queues, pub/sub, and real-time structures
  • PostgreSQL: General-purpose open-source relational database and extension hub
What are the main differences between Redis and PostgreSQL?
  • ACID: Redis (Atomic commands; MULTI/EXEC is not full RDBMS ACID) vs PostgreSQL (Full ACID compliance)
  • Index Support: Redis (Secondary indexes via Redis Query / RediSearch; sorted sets) vs PostgreSQL (B-tree, Hash, GiST, GIN, BRIN, and extension indexes (e.g. vectors))
  • Concurrency: Redis (Very high ops/sec; single-threaded command execution per shard) vs PostgreSQL (Excellent MVCC for mixed read/write workloads)
  • Scalability: Redis (Cluster mode sharding + replicas) vs PostgreSQL (Vertical scale + replicas; sharding via extensions/ops)
  • SQL Support: Redis (no) vs PostgreSQL (yes)
How do Redis and PostgreSQL compare on pricing?

Redis pricing overview:

  • Has a free tier
  • Pricing model: open source
  • Starting from ~$0/mo
  • Plan Open Source / CE: Free
  • Plan Redis Cloud: Usage-based

PostgreSQL pricing overview:

  • Has a free tier
  • Pricing model: open source
  • Starting from ~$0/mo
  • Plan Open Source: Free
  • Plan Managed clouds: Vendor pricing

Always verify current prices on the vendor site before buying.

Do Redis and PostgreSQL offer a free tier?
  • Redis: Has a free tier
  • PostgreSQL: Has a free tier
Are Redis and PostgreSQL open source?
  • Redis: yes
  • PostgreSQL: yes
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Related alternatives

Redis alternatives

PostgreSQL alternatives

Disclaimer:Not Financial or Investment Advice, Educational/Dev Tool Comparison Only. Information may change; always verify pricing on the vendor site before purchasing.