Mongo is an independent guide site about AI assistants and software tools. We research, compare and explain the tools people actually use for writing, coding, research and productivity — so you can pick the right one without wading through vendor marketing.
What you will find here
- Honest comparisons — feature-by-feature breakdowns with a clear verdict, like Claude vs ChatGPT and Notion vs Obsidian.
- Curated lists — the best free and paid options for a job, starting with 10 best free ChatGPT alternatives.
- Plain-English explainers — what new technology actually means, such as What is an AI agent?
How we work
Every guide is written from primary sources: official pricing pages, documentation, and independent reviews. We note when pricing or features may have changed and link you to the source so you can verify. When we cannot confirm something, we say so instead of guessing.
We do not take payment for rankings. Some posts may contain affiliate links in the future, which would never change a verdict — it would only help keep the site free.
Who this is for
Writers, developers, students, small-business owners and curious beginners — anyone who wants a straight answer to "which tool should I use, and is it worth paying for?"
Start here
- 10 best free ChatGPT alternatives in 2026
- Claude vs ChatGPT: which is better?
- What is an AI agent?
- Notion vs Obsidian
Questions or corrections? Leave a comment on any post — corrections are always welcome and credited.