About LessWrong
A community blog and forum dedicated to rationality, Bayesian reasoning, and improving forecasting skills through discussion and debate.
The community at a glance
LessWrong is an online community for Forecasters with roughly 25K members. It has been around since 2009. It uses a forum format for communication. It is the 6th largest community in the Prediction Markets topic page.
Community Features
This community has a forum
Community Reviews
Frequently asked questions
- Who is LessWrong for?
- Best for Forecasters enthusiasts looking for a an independent setup-based community with forum discussion.
- Is LessWrong free to join?
- This listing is not marked as paid-only. Access rules and any fees are decided by the community.
- How many members does LessWrong have?
- Roughly 25K members, based on figures reported by the community or its host. Member counts are approximate and change over time.
- What topics does LessWrong cover?
- On the Hive Index, LessWrong is organized under Forecasters.
- How do I join LessWrong?
- You can join LessWrong by clicking this link, or pressing the "Go to community" button above.
- What are the Prediction Markets communities like?
- Online communities for forecasting future events, debating prediction markets, and sharpening your probabilistic thinking skills.
Added 10/14/2026
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