Hackernews posts about YC S21

YC S21 is the 2021 class of Y Combinator, a well-known startup accelerator and investor that provides funding and support to early-stage companies.

1. Launch HN: Context.dev (YC S26) – API to get structured data from any website (www.context.dev)
   119 points by TheYahiaBakour 25 days ago | 86 comments
2. Launch HN: Bloomy (YC S26) – AI-powered mastery learning for K-12
   102 points by alexsouthmayd 14 days ago | 107 comments
3. Launch HN: Screenpipe (YC S26) – Record how you work and turn that into agents
   88 points by louis030195 11 days ago | 67 comments
4. Launch HN: Agnost AI (YC S26) – Extract user feedback from agent conversations (agnost.ai)
   85 points by laalshaitaan 20 days ago | 52 comments
5. Launch HN: Rise Reforming (YC S26) – Turning Waste Gases into Valuable Chemicals (www.rise-reforming.com)
   85 points by george_rose25 7 days ago | 38 comments
6. Launch HN: Prized (YC S26) – Let non-engineer staff build secure internal tools (prized.dev)
   77 points by marinoseliades 4 days ago | 58 comments
7. Launch HN: Tokenless (YC S26) – Automatic model switching to save money (usetokenless.com)
   71 points by rohaga 5 days ago | 63 comments
8. Launch HN: Traceforce (YC S26) – Company-wide security monitoring for AI apps
   44 points by XiaHua 18 days ago | 28 comments
9. Launch HN: Coasty (YC S26) – An API for computer-use agents (coasty.ai)
   44 points by nkov47 19 days ago | 26 comments
10. Applied Electrodynamics (YC S26) A new kind of camera that can see through walls (twitter.com)
    5 points by max_zorin_phd 2 days ago | 1 comments
11. Show HN: Vendo (YC S26) – Let your users add their own features to your product (github.com)
    2 points by yousefh409 19 days ago | 4 comments
12. Show HN: CodeAlmanac – Karpathy-style codebase wiki from your conversations (github.com)
    60 points by divitsheth 13 days ago | 21 comments
13. Show HN: Housecat.com – Gmail + durable workflows + sandbox VM (housecat.com)
    15 points by nzoschke 12 days ago | 6 comments
14. Rustwright: Playwright rewritten in Rust that uses 70% less memory (github.com)
    12 points by suchintan 19 days ago | 4 comments
15. Show HN: CodeAlmanac – Self-updating wiki for your coding agent (local, Apache) (github.com)
    8 points by reveriedev 25 days ago | discuss
16. Show HN: Willow Voice – Free AI Dictation (willowvoice.com)
    2 points by LiuLawrence45 24 days ago | discuss
17. Launch HN: Exa (YC S21) – The web as a database
    412 points by willbryk about 1 year ago | 133 comments
18. Launch HN: GPT Driver (YC S21) – End-to-end app testing in natural language
    129 points by cschiller almost 2 years ago | 82 comments
19. Launch HN: ASim (YC S21) – Mobile app that generates mobile apps
    90 points by dli123 over 1 year ago | 61 comments
20. Launch HN: Indy (YC S21) – A support app designed for ADHD brains (www.shimmer.care)
    85 points by christalwang 7 months ago | 93 comments
21. Show HN: Exa (YC S21) – embeddings search agent with >20x recall than Google (websets.exa.ai)
    28 points by willbryk over 1 year ago | 4 comments
22. Show HN: Numscript, a declarative language to model financial transactions (playground.numscript.org)
    202 points by superzamp almost 2 years ago | 47 comments
23. Launch HN: Runtime (YC P26) – Sandboxed coding agents for everyone on a team (www.runtm.com)
    103 points by gustrigos 2 months ago | 30 comments
24. Show HN: Open-source distributed quantum compute network (quip.network)
    11 points by cadillion 4 months ago | 10 comments
25. Show HN: A mobile app that generates mobile apps in 30 secs
    10 points by dli123 over 1 year ago | 4 comments
26. Show HN: ASim – generate functional mobile apps instantly on your phone (asim.sh)
    10 points by dli123 almost 2 years ago | discuss
27. Show HN: ASim – generate usable mobile apps instantly (asim.sh)
    5 points by dli123 almost 2 years ago | discuss
28. Show HN: Syntro.io (syntro.io)
    4 points by maomorales 11 months ago | discuss
29. Sharing Economy Thrived with Consumers but Lags in Corporate World. Until Now
    2 points by Stephen_Roamr over 1 year ago | 1 comments
30. Show HN: YC Network Search – Use natural language to find YC people (sena.so)
    3 points by recmend 10 months ago | 1 comments
31. Launch HN: Cactus (YC S25) – AI inference on smartphones (github.com)
    123 points by HenryNdubuaku 11 months ago | 63 comments
32. Launch HN: Airhart Aeronautics (YC S22) – A modern personal airplane
    738 points by n_ermosh almost 2 years ago | 615 comments
33. Launch HN: Sorcerer (YC S24) – Weather balloons that collect more data
    365 points by tndl almost 2 years ago | 172 comments
34. Launch HN: Silurian (YC S24) – Simulate the Earth
    338 points by rejuvyesh almost 2 years ago | 141 comments
35. Launch HN: Haystack (YC S24) – Visualize and edit code on an infinite canvas (github.com)
    328 points by akshaysg almost 2 years ago | 173 comments
36. Launch HN: Skyvern (YC S23) – open-source AI agent for browser automations (github.com)
    327 points by suchintan almost 2 years ago | 74 comments
37. Launch HN: Stack Auth (YC S24) – An Open-Source Auth0/Clerk Alternative (github.com)
    280 points by n2d4 almost 2 years ago | 141 comments
38. Launch HN: Hyprnote (YC S25) – An open-source AI meeting notetaker
    270 points by yujonglee about 1 year ago | 180 comments
39. Launch HN: Morph (YC S23) – Apply AI code edits at 4,500 tokens/sec
    217 points by bhaktatejas922 about 1 year ago | 185 comments
40. Launch HN: CodeViz (YC S24) – Visual maps of your codebase in VS Code
    189 points by LiamPrevelige almost 2 years ago | 89 comments
41. Launch HN: Deepsilicon (YC S24) – Software and hardware for ternary transformers
    189 points by areddyyt almost 2 years ago | 79 comments
42. Launch HN: Bitrig (YC S25) – Build Swift apps on your iPhone
    188 points by kylemacomber 11 months ago | 122 comments
43. Launch HN: Continue (YC S23) – Create custom AI code assistants (hub.continue.dev)
    178 points by sestinj over 1 year ago | 110 comments
44. Launch HN: AgentMail (YC S25) – An API that gives agents their own email inboxes
    169 points by Haakam21 6 months ago | 169 comments
45. Launch HN: Modern Realty (YC S24) – AI Real Estate Agent for Home Buyers
    153 points by greenfish6 almost 2 years ago | 305 comments
46. Launch HN: Maitai (YC S24) – Self-Optimizing LLM Platform
    149 points by cmdalsanto almost 2 years ago | 75 comments