AI Product · Knowledge ToolSep 2025Live

Kognix

AI-powered knowledge workspace that lets you chat with PDFs, notes and URLs via retrieval-augmented generation.

Role —Solo founder · full-stackTimeline —6 weeks
Kognix — product screenshot
Live
Public release
BYO-Key
Cost-conscious mode
01Problem

What needed solving.

Personal knowledge keeps fragmenting across PDFs, saved notes and link dumps. General-purpose chatbots hallucinate and don't cite their sources, while heavier knowledge tools are expensive and locked into a single LLM provider.
02Approach

How I built it.

Kognix is a focused RAG workspace: ingest PDFs, notes and URLs, then ask questions whose answers are grounded in your own sources, with citations back to the original document. A free tier lowers the barrier to try it; a bring-your-own-key path keeps power users in control of cost and provider choice.

Key engineering decisions
  • 01Implemented chunk-level citations so every answer links back to the exact source paragraph, not just the document — making hallucination visible rather than hidden.
  • 02Bring-your-own-key support required abstracting the LLM client behind a provider interface, which also made it straightforward to add model switching later.
  • 03Used Cloudflare for edge delivery of the frontend so load times are fast globally without managing regional infrastructure.
03Features

What it does.

Source-grounded answers with citations

Every answer links back to the exact chunk from your uploaded PDF, note or URL — so you can verify rather than trust.

Bring-your-own-key support

Power users can supply their own OpenAI API key to control cost and avoid usage caps, while casual users get a hosted free tier.

Multi-format ingestion

Upload PDFs, paste notes, or provide URLs. Kognix processes and indexes them all into a unified knowledge base you can query conversationally.

Full feature list (2 more)
  • 01Simple onboarding and dashboard
  • 02Retrieval-augmented generation pipeline
04Results

What it shipped.

Launched publicly on Railway and Cloudflare. The bring-your-own-key flow had a higher activation rate than expected — cost-conscious users appreciated the transparency. Source citations were consistently mentioned as the key differentiator over general-purpose chatbots.

05Stack

Built with.

Next.jsTypeScriptRAGVector SearchRailwayCloudflare
06Live & links

See it live.

Live site
07Next case study
km-pyapi

FastAPI-inspired REST framework, published to PyPI — built to understand framework internals from the ground up.