This document describes the main ways of hosting [Unleash Edge](../generated/unleash-edge.md) (or alternatively [Unleash Proxy](../generated/unleash-proxy.md)) alongside the Unleash API and the tradeoffs between self-hosting compared to using the Frontend API that Unleash hosts for you.
Whether you're hosting Unleash yourself or have a managed solution will be a key consideration.
Edge is the next-gen replacement of the Unleash proxy and is recommended to be used over the proxy in most cases, with the exception of the scenario where custom strategies are being used as Edge does not support these.
In general, we recommend you use Edge over the [Frontend API](https://docs.getunleash.io/reference/front-end-api), but we do recognize that self-hosting requires some extra work on your part and that not all our customers need it.
- There's no guarantee that it'll be geographically close to your end users, this means your end users might be getting slower response times on feature flag evaluations.
- When we host the frontend API, we will also receive whatever end-user data you put in the [Unleash context](../reference/unleash-context.md). This may or may not be an issue depending on your business requirements.
Hosting Edge requires a little more setup than the Unleash-hosted Frontend API does, but it offers a number of benefits over both the frontend API and Proxy:
- Edge can handle multiple sets of API tokens and sync these automatically. Compared to the legacy proxy, it is not necessary to set up single instances per token.
- A key benefit of Edge is its ability to dynamically update new tokens while running. This greatly simplifies scaling up additional application workloads that leverage new tokens without the need to restart the instance or make large changes to infra, as was the prior requirement with the proxy.
- You can arrange for Edge to be close to your applications, minimizing response times.
- You have full control of all your user data. None of the data that Edge receives is ever sent to the Unleash API. This keeps _your_ data in _your_ hands.
Unleash no longer hosts instances of the proxy, but makes the [Frontend API](../reference/front-end-api) available to all Pro and Enterprise customers. The API is backed by an Amazon RDS database. Your applications can connect to the frontend API from your own cloud or from other hosting solutions.
This is the simplest, but also most limited (by far) way to use Unleash client SDKs. In this setup, Unleash hosts both the Unleash API and the Unleash frontend API. With Unleash hosting, you'll only need to worry about the Frontend API keys and the URL to access the endpoint.
While this is easy to get started with, it comes with the limitations described in the [section on tradeoffs between self-hosted and Unleash-hosted setups](#unleash-hosted-or-self-hosted).
You host Edge yourself. It runs in a standalone container alongside your other applications in your cloud or hosting setup. Unleash manages the Unleash API, the admin UI, and the backing database in our AWS setup; the API and the UI run together in a Kubernetes deployment and connect to an Amazon RDS database.
- Create one or more [client API tokens](https://docs.getunleash.io/reference/api-tokens-and-client-keys#client-tokens) scoped to the projects/environments you wish to use the Edge instance for. Refer to[how to create API tokens](https://docs.getunleash.io/how-to/how-to-create-api-tokens)for the steps to create one.
- Create frontend tokens for the frontend apps that will retrieve feature flags from Edge.
Edge will fetch feature flags from the specified upstream Unleash instance for every client API key it has been made aware of, either during startup (recommended) or separate endpoint requests. It will then periodically sync features with upstream.
**To configure Edge and the SDKs, follow steps in the [previous section on Unleash hosts the API, you host Edge](#unleash-hosts-the-api-you-host-edge)**
As you might expect, doing everything yourself gives you the most flexibility, but also requires the most effort. However, if you're already hosting Unleash yourself, this shouldn't be any more difficult than the previous section.
As described in the [section on tradeoffs between self-hosted and Unleash-hosted setups](#unleash-hosted-or-self-hosted), running Edge yourself gives you a number of benefits.
You can also use Edge for a multi-region setup. You can run Edge in a different region to the API and still connect to the API. Because Edge runs closer to your applications it still provides you benefits in terms of quicker response times. Everything should be configured as described in the [you host everything section](#you-host-everything) or the [Unleash hosts the API, you host Edge section](#unleash-hosts-the-api-you-host-edge). You can add as many Edge instances in as many extra regions as you want.
If you are an existing Proxy user, see our [Edge migration guide](https://github.com/Unleash/unleash-edge/blob/main/migration-guide.md) for a guide on how to migrate.
Please take note of the section covering features Edge does not currently support in the same linked document before planning a migration.
:::
:::info Availability
This setup is only available to Pro and Enterprise customers.
:::
You host the proxy yourself. It runs in a standalone container alongside your other applications in your cloud or hosting setup. Unleash manages the Unleash API, the admin UI, and the backing database in our AWS setup: the API and the UI run together in a Kubernetes deployment and connect to an Amazon RDS database.
- The Unleash API url. This is your Unleash instance URL followed by `/api`.
- A [client API token](../reference/api-tokens-and-client-keys.mdx#client-tokens). Refer to [how to create API tokens](../how-to/how-to-create-api-tokens.mdx) for the steps to create one.
- One or more [proxy client keys](../reference/api-tokens-and-client-keys.mdx#proxy-client-keys). Refer to the [configuration section of the proxy document](../reference/unleash-proxy#configuration) for more details.
This setup requires a little more setup on your part than the Unleash-hosted proxy does, but it offers all the benefits described in the [section on tradeoffs between self-hosted and Unleash-hosted setups](#unleash-hosted-or-self-hosted).
