What users are saying about
13 Ratings
<a href='https://www.trustradius.com/static/about-trustradius-scoring#question3' target='_blank' rel='nofollow noopener noreferrer'>Customer Verified: Read more.</a>
169 Ratings
13 Ratings
<a href='https://www.trustradius.com/static/about-trustradius-scoring' target='_blank' rel='nofollow noopener noreferrer'>trScore algorithm: Learn more.</a>
Score 8.3 out of 101

Redis

<a href='https://www.trustradius.com/static/about-trustradius-scoring#question3' target='_blank' rel='nofollow noopener noreferrer'>Customer Verified: Read more.</a>
169 Ratings
<a href='https://www.trustradius.com/static/about-trustradius-scoring' target='_blank' rel='nofollow noopener noreferrer'>trScore algorithm: Learn more.</a>
Score 9.1 out of 101

Likelihood to Recommend

Azure Cosmos DB

Cosmos DB is hands-down the most flexible and performant way to store and access data related to the functionality of your applications. If you don't really need a 3rd-normal-form relational schema, and if you're not working on a (hot or cold) big data analytics scenario, then you should almost definitely be using Cosmos DB! The only major exception is if your use case can be addressed with some thoughtful planning and use of plain old Azure Storage, which might not get a lot of attention but is still a rock-solid platform.
Lars Kemmann profile photo

Redis

Redis is great at at reducing your reliance on SQL and the cost associated with running a SQL infrastructure.We have been able to scale out and improve performance on database requests. Reliability has also great improved over running a SQL infrastructure
No photo available

Feature Rating Comparison

NoSQL Databases

Azure Cosmos DB
9.6
Redis
8.3
Performance
Azure Cosmos DB
9.0
Redis
9.3
Availability
Azure Cosmos DB
10.0
Redis
8.8
Concurrency
Azure Cosmos DB
10.0
Redis
8.8
Security
Azure Cosmos DB
10.0
Redis
6.6
Scalability
Azure Cosmos DB
10.0
Redis
8.6
Data model flexibility
Azure Cosmos DB
10.0
Redis
7.7
Deployment model flexibility
Azure Cosmos DB
8.0
Redis
8.0

Pros

Azure Cosmos DB

  • Turn-key geo-redundancy with multi-master writes is unprecedented and unparalleled in the industry!
  • Guaranteed low latency makes Cosmos DB an excellent fit for most of our performance-intensive situations.
  • The tunable consistency model simplifies so many challenges in distributed systems engineering that otherwise require advanced knowledge of computer science topics. I continue to be impressed at how Cosmos DB has abstracted away so much complexity.
Lars Kemmann profile photo

Redis

  • Easy for developers to understand. Unlike Riak, which I've used in the past, it's fast without having to worry about eventual consistency.
  • Reliable. With a proper multi-node configuration, it can handle failover instantly.
  • Configurable. We primarily still use Memcache for caching but one of the teams uses Redis for both long-term storage and temporary expiry keys without taking on another external dependency.
  • Fast. We process tens of thousands of RPS and it doesn't skip a beat.
David Sommers profile photo

Cons

Azure Cosmos DB

  • Cosmos DB can be very expensive if you're using it for scenarios that are better completed in regular old Azure Table Storage or Blob Storage, specifically if you put some thought into your partitioning schemes. No product is a good substitute for thoughtful system design.
  • It would be helpful if I had some more insight into how many resources (DTUs) an individual query uses.
  • The auto-indexing is great, but a little mysterious -- not usually an issue but it does require some intentional thought.
Lars Kemmann profile photo

Redis

  • We had some difficulty scaling Redis without it becoming prohibitively expensive.
  • Redis has very simple search capabilities, which means its not suitable for all use cases.
  • Redis doesn't have good native support for storing data in object form and many libraries built over it return data as a string, meaning you need build your own serialization layer over it.
Eric Mason profile photo

Likelihood to Renew

Azure Cosmos DB

Azure Cosmos DB 10.0
Based on 1 answer
Cosmos DB has such a head start and unique position in the market, backed as it is by Microsoft's global backbone network, that it's hard to imagine any other solution coming close to it in terms of overall capabilities. While it's not the right fit for every situation, whenever Cosmos DB is a candidate it should probably be your first choice.
Lars Kemmann profile photo

Redis

Redis 9.4
Based on 12 answers
We will definitely continue using Redis because:1. It is free and open source.2. We already use it in so many applications, it will be hard for us to let go.3. There isn't another competitive product that we know of that gives a better performance.4. We never had any major issues with Redis, so no point turning our backs.
Rahul Chaudhary profile photo

Usability

Azure Cosmos DB

No score
No answers yet
No answers on this topic

Redis

Redis 8.4
Based on 3 answers
Redis has been around for very long and it is good at what it does. It proved to be very valuable in my use case for interfacing between two applications with very little code as it has drivers for almost every language out there and the community support is really good.
No photo available

Support

Azure Cosmos DB

No score
No answers yet
No answers on this topic

Redis

Redis 4.5
Based on 1 answer
Redis has lots of documentation publicly available so we do not require much support.
No photo available

Implementation

Azure Cosmos DB

No score
No answers yet
No answers on this topic

Redis

Redis 7.3
Based on 1 answer
Whitelisting of the AWS lambda functions.
No photo available

Alternatives Considered

Azure Cosmos DB

Cosmos DB is unique in the industry as a true multi-model, cloud-native database engine that comes with solutions for geo-redundancy, multi-master writes, (globally!) low latency, and cost-effective hosting built in. I've yet to see anything else that even comes close to the power that Cosmos DB packs into its solution. The simplicity and tooling support are nice bonus features as well.
Lars Kemmann profile photo

Redis

We are big users of MySQL and PostgreSQL. We were looking at replacing our aging web page caching technology and found that we could do it in SQL, but there was a NoSQL movement happening at the time. We dabbled a bit in the NoSQL scene just to get an idea of what it was about and whether it was for us. We tried a bunch, but I can only seem to remember Mongo and Couch. Mongo had big issues early on that drove us to Redis and we couldn't quite figure out how to deploy couch.
No photo available

Return on Investment

Azure Cosmos DB

  • Tremendously reduced our time-to-market with solutions built on graph databases
  • Helped our team to think more broadly about data by making NoSQL options much more accessible
  • Saved us significant effort on geo-replication and global availability
Lars Kemmann profile photo

Redis

  • Redis has helped us increase our throughput and server data to a growing amount of traffic while keeping our app fast. We couldn't have grown without the ability to easily cache data that Redis provides.
  • Redis has helped us decrease the load on our database. By being able to scale up and cache important data, we reduce the load on our database reducing costs and infra issues.
  • Running a Redis node on something like AWS can be costly, but it is often a requirement for scaling a company. If you need data quickly and your business is already a positive ROI, Redis is worth the investment.
No photo available

Screenshots

Azure Cosmos DB

Pricing Details

Azure Cosmos DB

General

Free Trial
Free/Freemium Version
Premium Consulting/Integration Services
Entry-level set up fee?
No

Redis

General

Free Trial
Yes
Free/Freemium Version
Yes
Premium Consulting/Integration Services
Yes
Entry-level set up fee?
Optional

Add comparison