Best of JS • Encore

Development Platform for building robust type-safe distributed systems with declarative infrastructure

Encore provides Open Source development tools, from local development to your cloud:

Backend frameworks: Encore.ts and Encore.go simplify defining services and type-safe APIs, and provide a declarative approach to define infrastructure in code.
Local development environment: Automates local infrastructure and provides a built-in local development dashboard with Tracing, Service Catalog, and API Explorer.
Infrastructure integration: Encore provides open source tooling to simplify integrating with cloud infrastructure, and offers a Cloud Platform that fully automates DevOps and infrastructure provisioning in your cloud on AWS and GCP.

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🏁 Try Encore: Quick Start Guide

💻 See example apps: Example Apps Repo

🚀 See products being build with Encore: Showcase

👋 Have questions? Join the friendly developer community on Discord.

📞 Talk to a human: Book a 1:1 demo with one of our founders.

🍿 Intro video

Watch the intro video for a quick introduction to Encore concepts & code examples.

Introduction to Encore

Cloud services enable us to build highly scalable applications, but often lead to a poor developer experience — forcing developers to manage significant complexity during development and do a lot of repetitive manual work.

Encore is purpose-built to solve this problem and provides a complete toolset for backend development — from local development and testing, to cloud infrastructure integration and DevOps.

How it works

Encore's open source backend frameworks Encore.ts and Encore.go enable you to define resources like services, databases, cron jobs, and Pub/Sub, as type-safe objects in your application code.

With the frameworks you only define infrastructure semantics — the things that matter to your application's behavior — not configuration for specific cloud services. Encore parses your application and builds a graph of both its logical architecture and its infrastructure requirements, it then automatically generates boilerplate and helps orchestrate the relevant infrastructure for each environment. This means the same application code can be used to run locally, test in preview environments, and deploy to cloud environments on e.g. AWS and GCP.

This often removes the need for separate infrastructure configuration like Terraform, increases standardization in both your codebase and infrastructure, and makes your application highly portable across cloud providers.

Encore is fully open source, there is no proprietary code running in your application.

Example: Hello World

Defining microservices and API endpoints is incredibly simple, requiring less than 10 lines of code to define a production-ready deployable service and API endpoint.

Using Encore.ts, it looks like this:

import { api } from "encore.dev/api";

export const get = api(
  { expose: true, method: "GET", path: "/hello/:name" },
  async ({ name }: { name: string }): Promise<Response> => {
    const msg = `Hello ${name}!`;
    return { message: msg };
  }
);

interface Response {
  message: string;
}

Using Encore.go, it looks like this:

package hello

//encore:api public path=/hello/:name
func World(ctx context.Context, name string) (*Response, error) {
	msg := fmt.Sprintf("Hello, %s!", name)
	return &Response{Message: msg}, nil
}

type Response struct {
	Message string
}

Example: Using Pub/Sub

If you want a Pub/Sub Topic, you declare it directly in your application code and Encore will integrate the infrastructure and generate the boilerplate code necessary. Encore supports the following Pub/Sub infrastructure:

NSQ for local environments (automatically provisioned by Encore's CLI)
GCP Pub/Sub for environments on GCP
SNS/SQS for environments on AWS

Using the Encore.ts, it looks like this:

import { Topic } "encore.dev/pubsub"

export interface SignupEvent {
    userID: string;
}

export const signups = new Topic<SignupEvent>("signups", {
    deliveryGuarantee: "at-least-once",
});

Using Encore.go, it looks like this:

import "encore.dev/pubsub"
 
type User struct { /* fields... */ }
 
var Signup = pubsub.NewTopic[*User]("signup", pubsub.TopicConfig{
  DeliveryGuarantee: pubsub.AtLeastOnce,
})
 
// Publish messages by calling a method
Signup.Publish(ctx, &User{...})

Learn more in the docs

See how to use the Backend Frameworks in the docs:

Services: Go / TypeScript
APIs: Go / TypeScript
Databases: Go / TypeScript
Cron Jobs: Go / TypeScript
Pub/Sub: Go / TypeScript
Caching: Go / TypeScript (Coming soon)

Using Encore: An end-to-end workflow from local to cloud

Encore provides purpose-built tooling for each step in the development process, from local development and testing, to cloud DevOps. Here we'll cover the key features for each part of the process.

Local Development

When you run your app locally using the Encore CLI, Encore parses your code and automatically sets up the necessary local infrastructure on the fly. No more messing around with Docker Compose!

You also get built-in tools for an efficient workflow when creating distributed systems and event-driven applications:

Local environment matches cloud: Encore automatically handles the semantics of service communication and interfacing with different types of infrastructure services, so that the local environment is a 1:1 representation of your cloud environment.
Cross-service type-safety: When building microservices applications with Encore, you get type-safety and auto-complete in your IDE when making cross-service API calls.
Type-aware infrastructure: With Encore, infrastructure like Pub/Sub queues are type-aware objects in your program. This enables full end-to-end type-safety when building event-driven applications.
Secrets management: Built-in secrets management for all environments.
Tracing: The local development dashboard provides local tracing to help understand application behavior and find bugs.
Automatic API docs & clients: Encore generates API docs and API clients in Go, TypeScript, JavaScript, and OpenAPI specification.

Here's a video showing the local development dashboard:

localdashvideo.2.mp4

Testing

Encore comes with several built-in tools to help with testing:

Built-in service/API mocking: Encore provides built-in support for mocking API calls, and interfaces for automatically generating mock objects for your services.
Local test infra: When running tests locally, Encore automatically provides dedicated test infrastructure to isolate individual tests.
Local test tracing: The local dev dashboard provides distributed tracing for tests, providing great visibility into what's happening and making it easier to understand why a test failed.
Preview Environments: Encore automatically provisions a Preview Environment for each Pull Request, an effective tool when doing end-to-end testing.

DevOps automation using Encore Cloud Platform

Encore Cloud Platform is Encore's product offering for teams wanting to focus their engineering effort on their product development, avoiding investing time in platformization and DevOps.

Encore Cloud Platform provides automatic infrastructure provisioning in your cloud on AWS & GCP. So instead of writing Terraform, YAML, or clicking in cloud consoles, you connect your cloud account and simply deploy your application. Because wyou don't need to specificy any configuration for specific cloud services when using Encore's frameworks, Encore Cloud Platform enables you to configure and change your infrastructure over time, without needing to make code changes or manually update infrastructure config files.

When you deploy, Encore Cloud Platform automatically provisions infrastructure using battle-tested cloud services on AWS and GCP, such as:

Compute: GCP Cloud Run, AWS Fargate, Kubernetes (GKE and EKS)
Databases: GCP Cloud SQL, AWS RDS
Pub/Sub: GCP Pub/Sub, AWS SQS/SNS
Caches: GCP Memorystore, Amazon ElastiCache
Secrets: GCP Secret Manager, AWS Secrets Manager
Etc.

Encore Cloud Platform also provides tools to help you reduce DevOps work by >90%:

Automatic least-privilege IAM: Encore parses your application code and sets up least-privilege IAM to match the requirements of the application.
Infra tracking & approvals workflow: Encore keeps track of all the infrastructure it provisions and provides an approval workflow as part of the deployment process, so Admins can verify and approve all infra changes.
Cloud config 2-way sync: Encore provides a simple UI to make configuration changes, and also supports syncing changes you make in your cloud console on AWS/GCP.
Cost analytics: A simple overview to monitor costs for all infrastructure provisioned by Encore in your cloud.
Logging & Metrics: Encore automatically provides logging, metrics, and integrates with 3rd party tools like Datadog and Grafana.
Extensible through Encore's Terraform Provider: Extend your system with any infrastructure services you need, integration is simple because all infrastructure is provisioned in your cloud. Encore also has a Terraform Provider to simplify this process.

Encore Cloud Platform also includes cloud versions of Encore's built-in development tools:

Here's a video showing the Cloud Platform Dashboard:

envs.mp4

Why use Encore?

Faster Development: Encore streamlines the development process with its Backend Framework, clear abstractions, and built-in development tools, enabling you to build and deploy applications more quickly.
Reduced Costs: Encore's automatic infrastructure management minimizes wasteful cloud expenses and reduces DevOps workload, allowing you to work more efficiently.
Scalability & Performance: Encore simplifies building large-scale microservices applications that can handle growing user bases and demands, without the normal boilerplate and complexity.
Control & Standardization: Built-in tools like automated architecture diagrams, infrastructure tracking and approval workflows, make it easy for teams and leaders to get an overview of the entire application.
Security & Compliance: Encore helps ensure your application is secure and compliant by enforcing security standards and provisioning infrastructure according to best practices for each cloud provider.

Common use cases

Encore is designed to give teams a productive and less complex experience when solving most backend use cases. Many teams use Encore to build things like:

High-performance B2B Platforms
Fintech & Consumer apps
Global E-commerce marketplaces
Microservices backends for SaaS applications and mobile apps
And much more...

Getting started

1. Install Encore with the Quick Start Guide
2. Follow a tutorial and build a bigger app
3. Follow and star the project on GitHub to stay up-to-date
4. Explore the Documentation to learn more about Encore's features
5. Join Discord to ask questions and meet other Encore developers

Open Source

Everything needed to develop and deploy Encore applications is Open Source, including the backend frameworks, parser, compiler, runtime, and CLI. This includes all code needed for local development and everything that runs in your application when it is deployed.

The Open Source CLI also provides a mechanism to generate a Docker images for your application, so you easily self-host your application. Learn more in the docs.

Join the most pioneering developer community

Developers building with Encore are forward-thinkers who want to focus on creative programming and building great software to solve meaningful problems. It's a friendly place, great for exchanging ideas and learning new things! Join the conversation on Discord.

We rely on your contributions and feedback to improve Encore for everyone who is using it. Here's how you can contribute:

⭐ Star and watch this repository to help spread the word and stay up to date.
Meet fellow Encore developers and chat on Discord.
Follow Encore on Twitter.
Share feedback or ask questions via email.
Leave feedback on the Public Roadmap.
Send a pull request here on GitHub with your contribution.

Videos

Visuals

Code example (Go)

Encore.example.1.mp4

Local Development Dashboard

indexvideo_5.mp4

Generated Architecture Diagrams & Service Catalog

index_1.mp4

Auto-Provisioning Infrastructure & Multi-cloud Deployments

envs.mp4

Distributed Tracing & Metrics

indexxxxx.mp4

Frequently Asked Questions (FAQ)

Who's behind Encore?

Encore was founded by long-time backend engineers from Spotify, Google, and Monzo with over 50 years of collective experience. We’ve lived through the challenges of building complex distributed systems with thousands of services, and scaling to hundreds of millions of users.

Encore grew out of these experiences and is a solution to the frustrations that came with them: unnecessary crippling complexity and constant repetition of undifferentiated work that suffocates the developer’s creativity. With Encore, we want to set developers free to achieve their creative potential.

Who is Encore for?

For individual developers building for the cloud, Encore provides a radically improved experience. With Encore you’re able to stay in the flow state and experience the joy and creativity of building.

For startup teams who need to build a scalable backend to support the growth of their product, Encore lets them get up and running in the cloud within minutes. It lets them focus on solving the needs of their users, instead of spending most of their time re-solving the everyday challenges of building distributed systems in the cloud.

For individual teams in large organizations that want to focus on innovating and building new features, Encore lets them stop spending time on operations and onboarding new team members. Using Encore for new feature development is easy, just spin up a new backend service in a few minutes.

How is Encore different?

Encore is the only tool that understands what you’re building. Encore uses static analysis to deeply understand the application you’re building. This enables a unique developer experience that helps you stay in the flow as you’re building. For instance, you don't need to bother with configuring and managing infrastructure, setting up environments and keeping them in sync, or writing documentation and drafting architecture diagrams. Encore does all of this automatically out of the box.

Unlike many tools that aim to only make cloud deployment easier, Encore is not a cloud hosting provider. With Encore, you can use your cloud account with AWS and GCP. This means you’re in control of your data and can maintain your trust relationship with your cloud provider. You can also use Encore's development cloud for free, with pretty generous "fair use" limits.

Why does Encore provide integrations with a cloud platform?

We've found that to meaningfully improve the developer experience, you have to operate across the full stack. Unless you understand how an application is deployed, there are a large number of things in the development process that you can't simplify. That's why so many other developer tools have such a limited impact. With Encore's more integrated approach, we're able to unlock a radically better experience for developers.

What if I want to migrate away from Encore?

Encore is designed to let you go outside of the framework when you want to, and easily drop down in abstraction level when you need to, so you never run into any dead-ends.

Should you want to migrate away, it's straightforward and does not require a big rewrite. 99% of your code is regular Go or TypeScript and the code specific to Encore is limited to using the framework.

Encore provides tools for self-hosting your application, by using the Open Source CLI to produce a standalone Docker image that can be deployed anywhere you'd like.

Contributing to Encore and building from source

See CONTRIBUTING.md.

import { api } from "encore.dev/api"; export const get = api( { expose: true, method: "GET", path: "/hello/:name" }, async ({ name }: { name: string }): Promise<Response> => { const msg = `Hello ${name}!`; return { message: msg }; } ); interface Response { message: string; }

package hello //encore:api public path=/hello/:name func World(ctx context.Context, name string) (*Response, error) { msg := fmt.Sprintf("Hello, %s!", name) return &Response{Message: msg}, nil } type Response struct { Message string }

import "encore.dev/pubsub" type User struct { /* fields... */ } var Signup = pubsub.NewTopic[*User]("signup", pubsub.TopicConfig{ DeliveryGuarantee: pubsub.AtLeastOnce, }) // Publish messages by calling a method Signup.Publish(ctx, &User{...})