AWS AppSync greatly simplifies building scalable GraphQL APIs by handling query execution, real-time subscriptions, offline synchronization, and data source integration, without requiring developers to build and maintain custom GraphQL servers. I especially appreciate its support for multiple backend sources within a single API, which lets applications pull data from Lambda, DynamoDB, Aurora, OpenSearch, and HTTP endpoints through a single, unified set of GraphQL queries.

The console includes a clean schema editor, resolver management, and query testing tools, so onboarding feels relatively straightforward. Performance is excellent as well, since AppSync resolves only the fields requested by clients, which helps reduce unnecessary network traffic. Although AppSync itself isn’t an AI platform, it can integrate smoothly with Amazon Bedrock and SageMaker via Lambda resolvers, making it possible to expose AI capabilities through GraphQL APIs. Review collected by and hosted on G2.com.

Resolver mapping templates, especially Apache Velocity Template Language (VTL), have a learning curve and can be difficult to debug for complex business logic. Although JavaScript resolvers have improved the developer experience, maintaining large GraphQL schemas still requires careful planning. Review collected by and hosted on G2.com.

Real time data sync built in, offline support,single api end point Review collected by and hosted on G2.com.

Limited flexibility, documentation gaps, complex pricing Review collected by and hosted on G2.com.

Managed GraphQL service: You get a fully managed GraphQL layer with less backend boilerplate, so you can focus more on the client and schema than infrastructure. Review collected by and hosted on G2.com.

Steep learning curve: You often need to understand GraphQL plus several AWS services (Cognito, DynamoDB, Lambda, etc.), which many see as overkill for smaller teams or projects. Review collected by and hosted on G2.com.

Useful in creating serverless api and accessing data from multiple data sources. Review collected by and hosted on G2.com.

Limited use of GraphQL and Lambda services Review collected by and hosted on G2.com.

This is my first time using this software and system, its user friendly and easy to navigate. Review collected by and hosted on G2.com.

Sometimes it’s difficult to get ahold of customer service. Review collected by and hosted on G2.com.

AWS Cloud Storage is highly durable, scalable and secure to handle files for your production apps and website. It offers different encryption technics to for better security. It stores files in different zones ensuring high availability Review collected by and hosted on G2.com.

Managing expenses is my biggest dislike, as I need to keep checking all the resources for different regions and it can be pretty challenging for beginners. Review collected by and hosted on G2.com.

AWS cloud storage services are highly durable, and it is maintained well, which is helping me with all my projects. They are storing multiple copies of data across different availability zones, ensuring high availability. It offers the best security features for data protection, including encryption. Review collected by and hosted on G2.com.

I know AWS provides cost optimization tools, but managing costs in a cloud environment can still be challenging. It is important to monitor resource usage, select appropriate storage classes, and set up proper cost controls to avoid unexpected expenses. Review collected by and hosted on G2.com.

AppSync is the best service and feature provided by AWS. As this is GraphQL, there is more that AWS delivers in AppSync. The subscription feature lets the cloud/server connect and send information to users that are connected. AppSync connects you to DynamoDB directly without using Lambda, which also reduces billing. Review collected by and hosted on G2.com.

AWS AppSync has a bug that our organization encountered 4 days ago. It may be a bug that requires fixing. As AWS AppSync recently announced custom authorization that allows custom implementation using Lambda. It also allows selecting specific authorization on priority. But it did not work with custom authorization as done using the following steps:

1. Custom authentication

2. API Cognito Pool

3. API key

In GraphQL we have schema e.g.

type Query @aws_cognito_user_pools {

getSites: genericResponse

getToken: genericResponse

}

type genericResponse {

statusCode: Int!

body: String!

}

Following query executed with token generated through cognito_pool and uses aws_cognito_user_pools authentication and it does not work and throws 401 error. This issue requires fixing. Review collected by and hosted on G2.com.

AWS AppSync is good in no. of ways such as

1. It saves Time

2. It is Highly Scalable

3. It can support Realtime applications

4. It supports for Offline Access Review collected by and hosted on G2.com.

Aws AppSync tho is super useful but has a big learning curve to get started with also debugging is bit tricky here. Review collected by and hosted on G2.com.

I like how AppSync helps decompose big building blocks into smaller primitives and removes my need of having a GraphQL server up and running. I can also link a DynamoDB table as a data source directly, without having to write custom resolvers, which is nice. Review collected by and hosted on G2.com.

The lack of a centralised data access layer is my single biggest issue about using generic index attributes in my data model while using AppSync. The frontend for AppSync is a clunky mess and makes the development process harder. Review collected by and hosted on G2.com.