GraphQL Portal is an open-source API aggregator. You can connect any data-source or API using one of our 30 connectors (REST, Swagger, SOAP, GraphQL, gRPC, Contentful, Salesforce, SAP etc...). Portal will then generate a GraphQL Schema and endpoint for you. It manages back-end caching, authentication, throttling, quotas. It's also shipped with a visual dashboard making it easier to setup and configure the gateway.
OneGraph - OneGraph is a GraphQL service that wraps and connects the internet's SaaS APIs. Build integrations to Stripe, Intercom, Salesforce, Zendesk, GMail, and more 10-100x faster with OneGraph.
StepZen - A low code way to create GraphQL APIs for any backend—REST, SQL, NoSQL, SOAP/XML. Deploy a single or federated graph to StepZen's cloud and run with built-in parallel execution, security for APIs and data, and performance & reliability optimizations.
Apigee - Intelligent and complete API platform
Meta-API.io - Unleash the power of APIs to connect apps and create new workflows.
Gravitee.io - Gravitee.io is a flexible, lightweight and an open source API management solution.
MuleSoft Anypoint Platform - Anypoint Platform is a unified, highly productive, hybrid integration platform that creates an application network of apps, data and devices with API-led connectivity.