Hackernews posts about W21

W21 is a year class in Y Combinator's (YC) accelerator program, indicating that these are startups that were part of the Winter 2021 batch.

1. Show HN: See the carbon impact of your cloud as you code (dashboard.infracost.io)
   67 points by hkh 18 days ago | 31 comments
2. Launch HN: Constellation Space (YC W26) – AI for satellite mission assurance
   48 points by kmajid 17 days ago | 18 comments
3. Capital One Strikes $5.15B Deal for Fintech Brex (YC W17)
   23 points by cj 16 days ago | 2 comments
4. EquipmentShare (YC W15) goes public (www.ycombinator.com)
   14 points by subsequent 15 days ago | 9 comments
5. 24-year-old Frenchman shows up at hospital with WW1 shell lodged in his rectum (english.elpais.com)
   12 points by TMWNN 5 days ago | 9 comments
6. CapitalOne buys Brex (YC W17) for $5.15B (www.cnbc.com)
   6 points by wdaher 16 days ago | 1 comments
7. Four Years of War in One Field – WW1 Documentary (No AI) [video] (www.youtube.com)
   1 points by vinnyglennon 19 days ago | discuss
8. Show HN: Managed Postgres with native ClickHouse integration
   45 points by saisrirampur 17 days ago | 9 comments
9. Ask HN: Mem0 stores memories, but doesn't learn user patterns
   9 points by fliellerjulian 3 days ago | 6 comments
10. Show HN: 83K lines of C++ – cryptocurrency written from scratch, not a fork (github.com)
    1 points by kristianXXI about 1 hour ago | discuss
11. Workers at Redmond SpaceX lab exposed to toxic chemicals (www.fox13seattle.com)
    178 points by SilverElfin 28 days ago | 55 comments
12. "The Stanford scam proves America is becoming a nation of grifters" (www.thetimes.com)
    38 points by cwwc 1 day ago | 44 comments
13. Is There a There in Cyberspace? (1995) (w2.eff.org)
    11 points by downboots 3 days ago | 4 comments
14. Show HN: Finite – NixOS Flake for Pi-Hole and Unbound on Raspberry Pi (github.com)
    5 points by wh1le 21 days ago | 1 comments
15. Tech Billionaires want us Dead – Taylor Lorenz [video] (www.youtube.com)
    5 points by pcthrowaway 20 days ago | discuss
16. Show HN: Directory of 1000 open source alternatives to popular software (ww17.your-domain.com)
    3 points by Zenith-Software 15 days ago | discuss
17. The Art of Thinking on Paper by Joanna Wiebe (www.youtube.com)
    2 points by rasengan0 21 days ago | discuss
18. The Economics of Parenting with Neighborhood and Peer Effects (www.nber.org)
    2 points by surprisetalk 28 days ago | discuss
19. Show HN: Directory of 1000 open source alternatives to popular software (ww17.your-domain.com)
    1 points by Zenith-Software 16 days ago | discuss
20. AI Baby Dance – Turn Photos into Viral Dance Videos (ai-baby-dance.com)
    1 points by wu1064442747 21 days ago | discuss
21. 221 Cannon is Not For Sale (fredbenenson.com)
    319 points by mecredis 5 days ago | 272 comments
22. Launch HN: Indy (YC S21) – A support app designed for ADHD brains (www.shimmer.care)
    85 points by christalwang 23 days ago | 93 comments
23. Map Shows 21 States Where Deaths Now Outnumber Births (2025) (www.newsweek.com)
    13 points by toomuchtodo 4 days ago | 5 comments
24. Exploring a Modern SMTPE 2110 Broadcast Truck with My Dad (www.jeffgeerling.com)
    3 points by HotGarbage about 13 hours ago | discuss
25. The $LANG Programming Language
    267 points by dang 25 days ago | 72 comments
26. Show HN: A password system with no database, no sync, and nothing to breach (bastion-enclave.vercel.app)
    12 points by KevinChasse 1 day ago | 16 comments
27. Show HN: I gave an AI $100 to trade crypto – it wrote its own trading rules (luckyclaw.win)
    3 points by xqliu 3 days ago | discuss
28. Show HN: BPU – Reliable ESP32 Serial Streaming with Cobs and CRC (github.com)
    2 points by octablock 1 day ago | discuss
29. Show HN: LinkScope – Real-Time UART Analyzer Using ESP32-S3 and PC GUI (github.com)
    1 points by octablock about 12 hours ago | discuss
30. Tree-sitter vs. Language Servers (lambdaland.org)
    266 points by ashton314 17 days ago | 69 comments