# Feature Comparison
Comparing Features of Other Rust GraphQL Implementations
**Please let me know if there is anything wrong.**
| | async-graphql | juniper(0.15.1) |
|------------------------------------------------------------------------|---------------|-----------------|
| async/await | 👍 | 👍️ |
| Rustfmt friendly(No DSL) | 👍 | ⛔️ |
| Boilerplate | Less | Some |
| Type Safety | 👍 | 👍 |
| Query | 👍 | 👍 |
| Mutation | 👍 | 👍 |
| Interfaces | 👍 | 👍 |
| Union | 👍 | 👍 |
| Dataloading | 👍 | 👍 |
| Custom Scalar | 👍 | 👍 |
| Custom Error | 👍 | 👍 |
| Custom Directive | 👍 | ⛔ |
| [Oneof Input Object](https://github.com/graphql/graphql-spec/pull/825) | 👍 | ⛔ |
| [Oneof Field](https://github.com/graphql/graphql-spec/pull/825) | 👍 | ⛔ |
| Extensions | 👍 | ⛔️ |
| Cursor Connections | 👍 | ⛔️ |
| Query complexity/depth | 👍 | ⛔️ |
| Input validators | 👍 | ⛔️ |
| Field guard | 👍 | ⛔️ |
| Multipart request(upload file) | 👍 | ⛔️ |
| Subscription | 👍 | 👍️ |
| Opentracing | 👍 | ⛔️ |
| Apollo Federation | 👍 | ⛔️ |
| Apollo Tracing | 👍 | ⛔️ |
| Apollo Persisted Queries | 👍 | ⛔️ |
| Disabling introspection | 👍 | ⛔️ |