DeepSeek
AppFree
A completely free chat assistant: writing, code and logic questions.
What sets it apart: No subscription; strong on questions that need reasoning.
For: People looking for a free assistant.
AI Guide · Free Alternatives
Setup with usWe can set up the open-source option for youServer, updates and security maintenance included. The guide stays free.CategoryAll Chat Assistants tools
ChatGPT Alternatives: Free and Open-Source Options
ChatGPT: a limited free tier; full use is paid. The 3 options below are free to start or open source; for each one, what you gain and what you lose is written from its official sources.
Output quality is not compared here. The differences come from each tool's own pages: setup, hardware, license, free limits, commercial use. To see which one suits you, try both on the same task. How tools are selected
Side by side
| ChatGPTpaid | DeepSeek | Ollama | LM Studio | |
|---|---|---|---|---|
| Access | Free tier | Free | Open source | Free tier |
| Where it runs | In the browser / app (cloud) | In the browser / app (cloud) | On your own computer | On your own computer |
| Free limit | Unlimited text chat with GPT-6 (subject to abuse guardrails); messages and file uploads, images, voice chat, deep research and Codex are limited | Free; no limit stated | The software is free | Running local models, chatting with documents and offline speech-to-text are free; web search is limited |
| Price | Go: $8/month (may include ads); Plus: $20/month; Pro: $100/$200/$500 | Free | Local use is free; optional cloud Pro: $20/month | Bionic+: $20/month (cloud models hosted in the US) |
| Info as of | Oct 8, 2026 | Oct 1, 2026 | Oct 1, 2026 | Oct 1, 2026 |
— : not checked. Details are in the cards below.
Alternatives and how they differ
Difference: Free, with a web search mode. Under its privacy policy, data is collected and stored in China; do not enter customer or employee data.
Best for: People who want a free chat assistant and won't enter sensitive data
Difference: Runs open models on your own computer; data never leaves it. Speed and usable model size depend on your computer's memory; setup is required.
Best for: People with a powerful computer who don't want to send customer data out
Ollama
DesktopFree · open sourceRuns open AI models on your own computer; sends no data to the internet.
What sets it apart: Download and run a model with one command; your chat never leaves your computer.
For: People with a powerful computer who don't want to send customer data out.
Difference: Runs local models without coding; chatting with documents is free. 16 GB of memory or more is recommended, and on Windows it needs a CPU with AVX2 support.
Best for: People who want to try local models without using the command line
LM Studio
DesktopFree + paidAn easy desktop app that downloads open models and runs them on your computer.
What sets it apart: No command line needed; pick a model, download, chat. You can attach a PDF and ask questions.
For: People who want to try local AI without writing code.
ChatGPT (paid)
ChatGPT
AppFree + paid
A general AI assistant that helps with almost any task: writes, summarizes, makes images, researches.
What sets it apart: Brings chat, images, voice, deep research and coding together in one app.
For: Everyone. One of the easy starting options for general writing and Q&A.