Open-source alternatives · decision guide
Best open-source Perplexity alternatives in 2026
Start with Vane or Morphic if you want an answer engine with web citations. Choose Khoj when your own documents matter as much as the web. GPT Researcher is a research agent and SearXNG is a search backend. Open WebUI is a broader, source-available AI interface included as an adjacent option; its current license has a branding condition.
This is a comparison of published project capabilities, checked October 22, 2026. “Best” depends on your use case. We have not run a matched hands-on benchmark or ranked answer quality.
The shortlist at a glance
| Project | What it is | Good starting point for | Check before choosing |
|---|---|---|---|
| Vane | Self-hosted AI answering engine with SearXNG and local or cloud models. | Perplexity-style cited web answers with control over the stack. | You operate the app and configure a model. |
| Morphic | AI search engine with cited answers and generative UI. | People who value rich answer presentation and provider choice. | Its documented Docker setup includes several services. |
| Khoj | Personal AI for web research and your own documents. | Search across notes, files, and online information. | Its wider assistant scope may be more than a web answer tool. |
| Open WebUI | Self-hosted AI interface with optional web-search integrations. | Existing Ollama users who also want chat and document workflows. | Configure and verify a search provider separately. |
| GPT Researcher | Agent for longer, multi-step research reports. | Structured research tasks instead of quick search answers. | Different workflow and resource needs from an answer engine. |
| SearXNG | Open-source metasearch engine. | Building or hosting the retrieval layer. | It does not itself add an LLM-written answer. |
| Farfalle | Self-hostable AI search project with local and cloud model options. | Experimenting with another answer-engine implementation. | Review its current repository setup and maintenance activity. |
Licenses are not identical
The current repositories identify Vane as MIT, Morphic, GPT Researcher, and Farfalle as Apache 2.0, and Khoj and SearXNG as AGPL 3.0. Open WebUI's current license includes a branding condition; its own license explanation says the current version is not under an OSI-approved open-source license. It is included here as a related self-hosted option, not counted as an open-source project. Check the exact version and full license before reuse or commercial deployment.
How to make the choice
For a web answer engine: begin with Vane and Morphic, then compare installation effort and the model/search providers you already use. For personal knowledge plus the web: read Khoj's document and online-search guides. For an Ollama-centered workspace: Open WebUI is a broader interface, but turn on and test a web-search integration before comparing sourced answers. For long-form research: GPT Researcher solves a different task. For raw search results: SearXNG is a building block.
What this comparison does and does not measure
The links in the table lead to the projects' own repositories. They establish project descriptions and documented setup options. They do not establish a winner on accuracy, latency, citation quality, or operating cost. To compare those outcomes, install the same versions, use the same test questions and source-checking rubric, and publish the date, models, hardware, and results.
“Open source” and “free to run” are separate questions; see our self-hosting cost guide.
Read Vane vs Perplexity, then follow the Docker installation guide. This site is an independent guide, not an official Vane service.