Omniplex is an open-source answer engine modelled on Perplexity: it takes a question, runs a web search, can call plugins for weather, stocks and dictionary lookups, and has a language model write a sourced answer. The code is a Next.js app published on GitHub under the AGPL-3.0 licence, with about a thousand stars, and the same project runs a hosted version. The repository's last commit dates from May 2024, and its search route calls the Bing Web Search API, which Microsoft has since retired, so self-hosters must swap in another search provider. It costs nothing to self-host beyond your own model and search API keys.

Platforms: Web
API: Not confirmed
Last verified: Oct 15, 2026

Verified sources

GitHub repository: 'Open-Source Perplexity', AGPL-3.0, about 1,060 stars, created April 2024, last commit 31 May 2024 (15 October 2026)github.com ↗
The repository's search route calls the Bing Web Search API with a BING_API_KEY (15 October 2026)github.com ↗
Hosted site loads its app shell, but its search endpoint returned HTTP 500 and the dictionary tool timed out with HTTP 504 (15 October 2026)omniplex.ai ↗

Fact check

Is Omniplex legit?

We don’t label tools safe or unsafe. Below are the records we checked ourselves, each with the date we read it.

Domain registered: Apr 24, 2024 (2 years ago)Registry record (RDAP), registrar GoDaddy.com, LLC, looked up Sep 18, 2026
TLS certificate: Issued by Let's Encrypt, valid until Dec 16, 2026Seen in our own connection to the site, before our last check on Oct 15, 2026
Last checked: Oct 15, 2026The site no longer answers
On the market since: 2024The vendor's own material, read by us
Operated by: Omniplex-aiOur research, card verified Oct 15, 2026

How we collect these records

Editorial verdict

Pros & cons of Omniplex

medium confidence

Omniplex was a credible open-source Perplexity clone in 2024, but the project has not been touched since May of that year and its hosted search no longer answers, so treat it as reference code rather than a working product. Developers who want a starting point for their own answer engine can still learn from it, provided they replace the retired Bing search integration; anyone who just wants to ask questions should use a maintained tool.

Pros

Source code is fully open under AGPL-3.0
Plugin design for web search, weather, stocks and dictionary lookups is easy to follow and extend
About a thousand GitHub stars and a readable Next.js codebase

Cons

No commits since May 2024; the project looks abandoned
The hosted site's search endpoint returned a server error and other tools timed out during this review
Search depends on the Bing Web Search API, which Microsoft has retired, so it must be replaced before self-hosting