Last checked October 2026 · 9 alternatives to ChatGPT in our catalog
ChatGPT paid plans start at $20/mo, which is why people look for an open-source alternative. Below are 4 open-source options you can inspect, modify and often self-host - 3 are completely free and 4 work in the browser.
Picked from listing data (price model, license, platforms, community votes), not hands-on testing.
| Alternative | Price | Open source | Platforms | What it is |
|---|---|---|---|---|
| Agent-Reach | Free | Yes (MIT) | Web | CLI that lets AI agents read and search the public web without API keys |
| claude-obsidian | Free | Yes (MIT) | Web | AI-powered chatbot for Obsidian |
| gpt4free | Free | Yes (GPL-3.0) | Web | Free web‑based GPT‑4 chatbot for research, study, and development |
| JeecgBoot | Freemium | Yes (Apache-2.0) | Web | Enterprise-level AI low-code platform |
CLI that lets AI agents read and search the public web without API keys
AI-powered chatbot for Obsidian
Free web‑based GPT‑4 chatbot for research, study, and development
Enterprise-level AI low-code platform
Agent-Reach is the first free alternative we list for ChatGPT and has no paid tier. Others worth a look: claude-obsidian, gpt4free and JeecgBoot. Which one fits depends on what you use ChatGPT for, so check the platform and free-plan details for each.
Yes: Agent-Reach, claude-obsidian, gpt4free and JeecgBoot. Open-source options can usually be inspected, modified and self-hosted.
Yes. The free plan includes Limited GPT-4o access, Web browsing and Basic file uploads. Paid plans start at $20/mo.
How this list is built: alternatives come from our catalog's curated alternative relationships; price model, license and platforms come from each product's listing; order is fully-free first, then community votes.
