PostgreSQL vs Redis

Which one do AI engines recommend, and how do they differ on price, fit and features?

The short answer

PostgreSQL is the stronger AI pick in Vector Databases: it has a visibility score of 49 versus 7.7 for Redis, and ranks ahead in 78% of the answers that name both.

Choose PostgreSQL if…

You want the brand AI engines rank higher (49 vs 7.7)
AI answers describe it more positively (35% vs 33% positive)
Free open-source software
Adds vector search to an existing PostgreSQL database without a new database

Choose Redis if…

You need a self-hosted or on-premises option
You need SOC 2 or ISO 27001 or ISO 27017 or ISO 27018 or ISO 27701 or ISO 42001 or ISO 22301 or ISO 9001 or PCI DSS or HIPAA or GDPR or CCPA or CSA STAR or VPAT or FIPS 140-3 coverage
You prefer a larger, established vendor (1,001–5,000 employees)
low-latency vector search alongside caching

AI visibility side by side

Latest weekly run · Nov 2

Metric	PostgreSQL	Redis
Visibility score	49%	7.7%
Change vs last week	New	New
Rank in Vector Databases	#3	#10
Share of voice	12.6%	3%
Mentions this run	59	14
Positive in AI answers	35%	33%

The stronger value in each row is marked with a ✓.

Visibility score trend

Weekly runs over the last 60 days

PostgreSQL 0pp · Redis 0pp over 0 weekly runs.

Engine by engine

PostgreSQL leads on 3 of 3 engines

ChatGPT

44.3%

6.1%

AI Mode

42.8%

3.5%

Perplexity

59.8%

13.5%

PostgreSQLRedis

Head to head in AI answers

9 engine answers name both brands

7PostgreSQL ranked higher

2Redis ranked higher

Prompt	Engine	PostgreSQL	Redis
How do I choose a vector database for a mid-market team?	AI Mode	#4	#6
How do companies store and search embeddings without a dedicated tool?	ChatGPT	#1	#6
How do companies store and search embeddings without a dedicated tool?	AI Mode	#3	#6
What should a vector database integrate with?	Perplexity	#1	#2
What are the best Vector Databases tools in 2026?	ChatGPT	#5	#9
What are the best Vector Databases tools in 2026?	AI Mode	#6	#9
Alternatives to the most popular vector database	Perplexity	#4	#6
Official website of the top vector database vendors	ChatGPT	#10	#7
Official website of the top vector database vendors	Perplexity	#12	#7

Features, pricing & fit

Dimension	PostgreSQL	Redis
Pricing model	—	Usage-based
Entry price	—	Free; paid from $0.007 / mo
Free plan	—	Yes
Deployment	—	Managed cloud service (Redis Cloud) on AWS, Azure and Google Cloud, plus on-premises and hybrid deployment with Redis Software.
Compliance	—	SOC 2, ISO 27001, ISO 27017, ISO 27018, ISO 27701, ISO 42001, ISO 22301, ISO 9001, PCI DSS, HIPAA, GDPR, CCPA, CSA STAR, VPAT, FIPS 140-3
Support	Community mailing lists, Community events and local user groups	Community support on the free plan, Basic support on Essentials plans, Redis support team on paid plans, Knowledge base
Founded	—	2011
Headquarters	United States	San Francisco, CA
Employees	51–200	1,001–5,000
Funding	—	Series D
Best for	—	Developers and digital businesses building fast apps and real-time AI agents that need low-latency data access.