Vane (formerly Perplexica)

DocsGPT is an MIT-licensed, open-source platform for teams that want AI search, assistants and agents over their own documents. It can run on your servers with local models, including fully air-gapped deployments where documents and questions stay inside your network. Answers include the source title and page number so readers can check the evidence.

Local Deep Research is a self-hosted AI research assistant for people who need cited answers drawn from academic papers, the web and their own documents. It can produce a quick summary or pursue a complex question through repeated searches, then assemble a structured report. It's open source under MIT.

Onyx is an AI search and chat platform for teams whose information is spread across workplace apps. It indexes company knowledge so employees can ask questions across sources and get answers grounded in relevant documents. Teams can deploy it in their own cloud or on bare metal, including an air-gapped environment.

Scira is an AI search engine for people who want answers backed by sources and control over the application they use for research. It has a hosted website, and you can self-host the open-source application under AGPL-3.0. Its live search relies on internet access and external services; self-hosting doesn't make that research offline.

Khoj is an AI assistant for people who want to ask questions across their own files, research the web, and give recurring work to agents. You can self-host it on your computer or server, or use Khoj's cloud app. It's open source under the GNU AGPL v3.0 license.

AppFlowy is a self-hosted Notion alternative for teams that want project management, shared documents, and AI in an environment they control. Its self-hosted enterprise offering can run on premises, in your own cloud, or in an air-gapped environment. Self-hosted LLMs and embedding models let you keep AI processing and workspace data inside your infrastructure, with no vendor access to your instance.