Amazon RDS vs Google Cloud Spanner vs Microsoft Azure SQL Database comparison

Amazon Web Services (AWS) and Google are both solutions in the Database as a Service (DBaaS) category. Amazon Web Services (AWS) is ranked #2 with an average rating of 8.3, while Google is ranked #8 with an average rating of 9.0. Amazon Web Services (AWS) holds a 24.7% mindshare in DS, compared to Google’s 4.5% mindshare. Additionally, 98% of Amazon Web Services (AWS) users are willing to recommend the solution, compared to 100% of Google users who would recommend it.

Amazon RDS

Read 54 Amazon RDS reviews

4,861 Views
4,099 Comparison Views

98% willing to recommend

Google Cloud Spanner

Read 5 Google Cloud Spanner reviews

821 Views
617 Comparison Views

100% willing to recommend

Microsoft Azure SQL Database

Read 117 Microsoft Azure SQL Database reviews

5,959 Views
2,686 Comparison Views

96% willing to recommend

Amazon RDS

Google Cloud Spanner

Microsoft Azure SQL Database

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Executive Summary

We performed a comparison between Amazon RDS, Google Cloud Spanner, and Microsoft Azure SQL Database based on real PeerSpot user reviews.

Find out what your peers are saying about Microsoft, Amazon Web Services (AWS), MongoDB and others in Database as a Service (DBaaS).

To learn more, read our detailed Database as a Service (DBaaS) Report (Updated: May 2025).

Buyer's Guide

Database as a Service (DBaaS)

May 2025

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Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:

Mindshare comparison

As of May 2025, in the Database as a Service (DBaaS) category, the mindshare of Amazon RDS is 24.7%, down from 27.7% compared to the previous year. The mindshare of Google Cloud Spanner is 4.5%, up from 3.8% compared to the previous year. The mindshare of Microsoft Azure SQL Database is 15.9%, down from 18.3% compared to the previous year. It is calculated based on PeerSpot user engagement data.

Database as a Service (DBaaS)

Featured Reviews

Samuel Ebite

AICE Graduate at alx_africa

Ensure high availability with robust encryption and seamless backups

Amazon RDS provides data encryption using services like KMS, crucial for securing high-sensitive data and meeting compliance requirements such as HIPAA or PCI DSS. The best practices we've employed with RDS help design a well-architected framework, encompassing security, encryption, scalability with multi-availability zone deployment, and operational excellence with automated backups. RDS features, such as reserved instances, storage auto-scaling, monitoring with technologies like CloudWatch, and proxies, contribute to cost optimization. The solution enhances security with IAM authentication and offers high availability to end users.

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Ethan Lo

Infrastructuer Security at Premise Data

A stable and scalable relational database that ensures a return on investment for its users

The most valuable feature of the solution is its scalability. Scalability comes with two options, among which Google Cloud Spanner can scale horizontally, compared to other relational databases that scale vertically. You can change Google Cloud Spanner's resource configuration, which is done through processing units. Suppose you set up Google Cloud Spanner initially with a hundred processing units, and then you run out of resources since your database used too much CPU. In the aforementioned scenario, you can scale up or down and face no downtime in the production phase. The solution's features are important when running a company twenty-four hours, seven days a week.

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Charley Hanania

Data Platform Specialist at QS2 AG - Quality Software Solutions

It is very easy to implement, manage, and offers great insights into what is happening inside the engine

Microsoft Azure SQL Database is integrated into other Azure capabilities and has a great foundation being on SQL Server with a long history of security, performance, and usability from a DBA perspective. Once you've set up a server, adding databases is easy. There's a minor challenge with having data in separate databases that you want to connect like we do on premises. I'm looking forward to using some of these new AI-driven functions that have come out around vectorization. Having the data closer to my transactional databases or data makes it easy to augment and enhance the Database and applications I currently use. It's great that Azure SQL now seamlessly integrates with Microsoft Fabric. It's a first-tier service in the cloud that connects to web applications and other databases. The data transformation orchestration capabilities within Database Factory and similar capabilities make it effortless to move that stuff forward.

Read full review

Quotes from Members

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:

Pros

"The product's most valuable features are option groups, S3 integration, automated and scheduled snapshots, and cross-region replication."

"I found it to be a stable solution."

"The solution has unique features like backup and recovery, and snapshots. It upgrades automatically. The solution offers easy analytics concerning performance metrics. Its reliability and scalability are very good. The tool's most valuable features are disaster recovery, high availability and scalability."

"It handles large-scale data migrations perfectly. Amazon RDS's performance is quite good. Charges are incurred after you utilize the service"

"Amazon RDS is good for backups, auto-scanning, and disaster recovery. It's also appropriate for the office server."

"It is easy to use, flexible, and powerful."

"It's a fully managed database, so that makes our life easier from the operational standpoint. That is the key, basically."

"The most valuable feature of Amazon RDS is its performance."

More Amazon RDS pros

"Google Cloud Spanner is stable."

"We can scale the solution if we need to."

"The application deployment in the cloud is the best feature of the infrastructure."

"The most valuable feature of the solution is its scalability. Scalability comes with two options, among which Google Cloud Spanner can scale horizontally, compared to other relational databases that scale vertically."

"It is a very scalable solution."

"I like that Microsoft Azure SQL Database is almost identical to an on-premise SQL Server except for a few things, like how you edit rows and some jobs that you can't run."

"The most valuable aspect of Microsoft Azure SQL Database is its accessibility."

"The data availability and speed are impressive, especially compared to legacy systems. The loading speeds are much faster on Azure SQL."

"The backup features are the most valuable."

"Azure SQL Database has significantly reduced our total cost of ownership by eliminating the need for managing physical infrastructure, including data warehouses and data centers."

"The scalability and simple management of the infrastructure are the most valuable features."

"SQL Azure is reliable and scales well."

"The solution has become easier to use over time and it's also reasonably priced."

More Microsoft Azure SQL Database pros

Cons

"The security features could be improved."

"When you are using it for the first time, it is a little bit hard to configure. The first-time configuration is not very easy. It should be easier to configure. Its installation should also be simpler. Currently, its installation is very complex. With SQL Server, we have access to the SQL Server analysis services and reporting services, but such services are not available with Amazon RDS."

"Amazon RDS could improve by having more sophisticated. I use other solutions that have better technology for more difficult tasks."

"Some of the features will not be there. For example, some on-premises things we want to set up will not be supported there. There are some challenges that they are fixing."

"I would like to see improvements in the tool's automatic restart."

"I feel Amazon RDS should have a lot of functionalities to make monitoring within the database easier."

"The technical support from Amazon could improve. I would rate them a six out of ten as they do not fully meet my expectations."

"The solution's connectivity and response logs could be improved."

More Amazon RDS cons

"The tool lacks to offer AI features."

"The cost can be a bit high."

"The tool needs to improve horizontal scaling."

"I want to improve the deployment of cameras and surveillance infrastructure."

"Google came up with something called Cloud Spanner Emulator, which fails to work like the real product if I want to develop some code and run a database locally on my machine."

"Microsoft Azure SQL Database would benefit from enhanced documentation, along with ongoing improvements to scalability and cost-effectiveness."

"The document storage is primarily relational, which is not ideally suited for SQL. If there were better integration with SharePoint for document handling in SQL, it would greatly benefit the organization. Moreover, the current on-premise limitations prevent direct file pulling, limiting certain capabilities."

"It is a little bit expensive for us. They can improve the price. It would also be very helpful if they can offer some free trial."

"There is a need for dynamic scaling support without losing current transactions. That should be part of the standard offering to SKUs. It doesn't have Auto SQL. We have HyperSQL, but there are limitations on the Elastic Pool. It only allows 25 databases. It would help if we could automatically analyze and optimize long-running queries instead of handling these tasks manually."

"Microsoft Azure SQL Database would benefit from enhanced documentation, along with ongoing improvements to scalability and cost-effectiveness."

"The product could be more competitive in terms of features, security, and scalability."

"We've had many concurrency issues with it, particularly with applications that do a lot of parallel processing. We noticed that sometimes the Azure SQL databases would spike and peak their CPU units, causing some performance issues for us. It would be helpful if CPU performance were not pinned to the amount of storage you're using, and we could scale different properties of the Azure SQL database independently."

"Its automation can be improved. SQL Server Agent was a very big part of the on-prem tools. While moving from on-prem to the cloud, redoing some of such tools was very cumbersome in Azure. There was a whole new set of technologies and methodologies. It should have easier automation-type features to be able to implement such tools. It should have almost a SQL agent type of substance built into that."

More Microsoft Azure SQL Database cons

Pricing and Cost Advice

"On a scale from one to ten, where ten is the most expensive, and one is the cheapest, I rate the solution's pricing a seven out of ten."

"It is less expensive than SQL Server. We pay based on the usage on a monthly basis."

"if you don't know how to optimize and use your tool properly, the cost might hurt you."

"Amazon RDS is less expensive than other solutions."

"The substantial initial credit and cost-effectiveness make Amazon an attractive option."

"The platform pricing is on the higher side, but given its capabilities and ease of use, it remains competitive."

"The pricing of RDS is a little bit high compared to Microsoft... However, it is a good price compared to other solutions."

"The product is expensive."

More Amazon RDS pricing and cost advice

"The solution is expensive."

"It is expensive."

"Google Cloud Spanner is an expensive solution."

"Price-wise, I heard that Google Cloud Spanner is on the higher side."

"It requires a license. As compared to its competitors, such as Oracle, it is affordable and reasonable."

"We pay less than $1000 monthly in licensing fees. There are no additional costs."

"There is a license required to use the solution and it cost $30 to do the installation."

"We have had some issues with the licensing of the solution."

"It is expensive for us. We are looking for something less expensive and thinking of migrating the whole system."

"It is reasonable."

"You can use it for smaller instances and pay less. You can also go for the premium product with all the security, scalability, and business continuity features, but you have to pay a premium amount."

"We have the licensing fee, and we are also paying a third party to maintain it with an SLA. There is no infrastructure cost, but its running costs are higher than expected. There is the cost of the Azure cloud, which is pricier than expected, but it is not specific to SQL Azure. It is specific to the cloud. You expect it to be cheaper, but it is more expensive to run it."

More Microsoft Azure SQL Database pricing and cost advice

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Top Industries

By visitors reading reviews

Computer Software Company

15%

Financial Services Firm

14%

University

Manufacturing Company

Financial Services Firm

21%

Computer Software Company

12%

Retailer

10%

Manufacturing Company

Educational Organization

70%

Computer Software Company

Financial Services Firm

Healthcare Company

Company Size

By reviewers

Large Enterprise

Midsize Enterprise

Small Business

No data available

Questions from the Community

What do you like most about Amazon RDS?

The product's installation phase is easy.

See all answers

What is your experience regarding pricing and costs for Amazon RDS?

The pricing for Amazon RDS is reasonable.

See all answers

What needs improvement with Amazon RDS?

One key improvement would be adding support for multi-storage paradigms, including columnar support, as seen in TiDB....

See all answers

What is your primary use case for Google Cloud Spanner?

Google Cloud Spanner has all the features of a traditional relational database, including schemas, SQL queries, ACID ...

See all answers

What do you like most about Google Cloud Spanner?

Google Cloud Spanner is stable.

See all answers

What is your experience regarding pricing and costs for Google Cloud Spanner?

Price-wise, I heard that Google Cloud Spanner is on the higher side. I am not sure if this is a rumor or if it's fake...

See all answers

What do you like most about SQL Azure?

The automated scalability feature of SQL Azure has proven to be highly beneficial, particularly when deployed in the ...

See all answers

What is your experience regarding pricing and costs for SQL Azure?

The pricing of Microsoft Azure SQL Database is not cheap, affecting user uptake. A gradual reduction in price could i...

See all answers

What needs improvement with SQL Azure?

Pricing could be improved to make Microsoft Azure SQL Database ( /products/microsoft-azure-sql-database-reviews ) mor...

See all answers

Comparisons

MongoDB Atlas vs Amazon RDS

Compared 27% of the time

Google Cloud SQL vs Amazon RDS

Compared 21% of the time

Oracle Database as a Service vs Amazon RDS

Compared 18% of the time

Oracle Exadata Cloud at Customer vs Amazon RDS

Compared 5% of the time

Yugabyte Platform vs Amazon RDS

Compared 3% of the time

More Amazon RDS Competitors

MongoDB Atlas vs Google Cloud Spanner

Compared 18% of the time

Google Cloud SQL vs Google Cloud Spanner

Compared 14% of the time

SingleStore vs Google Cloud Spanner

Compared 13% of the time

Redis vs Google Cloud Spanner

Compared 9% of the time

Oracle Database as a Service vs Google Cloud Spanner

Compared 8% of the time

More Google Cloud Spanner Competitors

Google Cloud SQL vs Microsoft Azure SQL Database

Compared 38% of the time

MongoDB Atlas vs Microsoft Azure SQL Database

Compared 17% of the time

Oracle Database as a Service vs Microsoft Azure SQL Database

Compared 8% of the time

vCloud Air vs Microsoft Azure SQL Database

Compared 3% of the time

Microsoft Azure Cosmos DB vs Microsoft Azure SQL Database

Compared 3% of the time

More Microsoft Azure SQL Database Competitors

Product Reports

Buyer's Guide

Amazon RDS

May 2025

Download Amazon RDS product report

Buyer's Guide

Database as a Service (DBaaS)

May 2025

Download Google Cloud Spanner product report

Buyer's Guide

Microsoft Azure SQL Database

May 2025

Download Microsoft Azure SQL Database product report

Also Known As

RDS

Google Spanner

No data available

Overview

Amazon Relational Database Service (Amazon RDS) is a web service that makes it easier to set up, operate, and scale a relational database in the cloud. It provides cost-efficient, resizeable capacity for an industry-standard relational database and manages common database administration tasks.

Amazon Web Services (AWS)

Cloud Spanner is the first and only relational database service that is both strongly consistent and horizontally scalable. With Cloud Spanner you enjoy all the traditional benefits of a relational database: ACID transactions, relational schemas (and schema changes without downtime), SQL queries, high performance, and high availability. But unlike any other relational database service, Cloud Spanner scales horizontally, to hundreds or thousands of servers, so it can handle the highest of transactional workloads. With automatic scaling, synchronous data replication, and node redundancy, Cloud Spanner delivers up to 99.999% (five 9s) of availability for your mission critical applications. In fact, Google’s internal Spanner service has been handling millions of queries per second from many Google services for years.

Google

Microsoft Azure SQL Database is a relational database-as-a-service that delivers predictable performance, scalability, business continuity, data protection, and near-zero administration to cloud developers and solution architects. This is the deep technical library for Azure SQL Database.

Microsoft

Sample Customers

Edmodo

Streak, Optiva, Mixpanel

adnymics GmbH, LG CNS, Centrebet, netfabb GmbH, MedPlast, Accelera Solutions, Sochi Organizing Committee, realzeit GmbH

Buyer's Guide

Database as a Service (DBaaS)

May 2025

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