> Markdown version of [Overview](https://vaadin.com/docs/v14/flow/integrations/portlet/overview). Section index: [llms.txt](https://vaadin.com/docs/v14/flow/llms.txt)
# Portlet Support
> **Note: Commercial feature**
>
> A commercial Vaadin subscription is required to use Portlet Support in your project.
>
> - [Start Free Trial](https://vaadin.com/trial)
>
> - [See Pricing](https://vaadin.com/pricing)
Vaadin Portlet support for Vaadin 14 is built on top of the [Portlet 3.0 Specification](https://download.oracle.com/otndocs/jcp/portlet-3-final-spec/). The Vaadin Portlet add-on has been developed and tested with Liferay 7 and the Apache Pluto Portal 3.1.0 (reference implementation for Portlet 3.0 API), but it can be run in other portals that support Portlet 3.0.
## Topics
## Limitations and Known Issues
- Vaadin Portlet does not support integration with `OSGi`, which comes with Liferay 7. Please vote for [OSGi support for Vaadin Portlet](https://github.com/vaadin/flow/issues/10939/) if you need it in your project, and leave a comment about your use cases.
- The `Vaadin Push` feature is [not currently supported](https://github.com/vaadin/portlet/issues/200/). Vaadin client-to-server polling can be used as a replacement.
- The `SPA` feature is not supported and needs to be disabled for Liferay. See [SPA issue](https://help.liferay.com/hc/en-us/articles/360030752391-Disabling-SPA/).
- The Vaadin Portlet API for changing a Portlet’s mode and state does not work with Liferay. See [this issue](https://github.com/vaadin/portlet/issues/214).
- Neither the `@PWA` annotation nor any PWA features are supported.
## Repositories
- [Vaadin Portlet Base Starter Project](https://github.com/vaadin/base-starter-flow-portlet)\
Simple project to get started with building Vaadin Portlets.
- [Vaadin Portlet Address Book Example Project](https://github.com/vaadin/addressbook-portlet)\
Address book built as a multi-module project with inter-portlet communication.
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