Hacker News Insights research
Hacker News in 2021
The strongest tracked Hacker News title themes in 2021, with annual shares and historical context.
Data through 2026-07-13
This page ranks the tracked topics by their share of retained Hacker News story titles in 2021. It is a full calendar year; topic patterns can overlap and the list is not a taxonomy of every story.
| Rank | Topic | Category | Title share |
|---|---|---|---|
| 1 | AI / LLM | AI | 1.517% |
| 2 | Bitcoin / crypto | Crypto & privacy | 1.515% |
| 3 | Open source | Meta | 1.014% |
| 4 | Security | Crypto & privacy | 1.007% |
| 5 | Linux | Infra | 0.825% |
| 6 | Startups | Meta | 0.808% |
| 7 | Python | Languages | 0.784% |
| 8 | Rust | Languages | 0.689% |
| 9 | Privacy | Crypto & privacy | 0.670% |
| 10 | JavaScript | Languages | 0.514% |
| 11 | React | Web | 0.328% |
| 12 | Kubernetes | Infra | 0.302% |
Context markers
- 2021-01 — GameStop / meme stocks: GME short squeeze 2021-01 — retail trading, Robinhood scrutiny.
- 2021-03 — NFT mania: Beeple sells for $69M 2021-03; NFTs go mainstream.
- 2021-06 — GitHub Copilot preview: Copilot (Codex) preview 2021-06 — AI pair programming arrives.
- 2021-11 — Bitcoin all-time high: BTC peaks ~$69k 2021-11; the cycle top.
- 2021-12 — Log4Shell: Log4j RCE (CVE-2021-44228) disclosed 2021-12-09 — internet-wide patching.
Method
Every percentage uses that year's retained story-title count as its denominator. Visit the Attention Lab for 2021 or read the methodology.