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: Hyprnote (YC S25) – An open-source AI meeting notetaker
   270 points by yujonglee 25 days ago | 180 comments
2. Launch HN: Channel3 (YC S25) – A database of every product on the internet
   144 points by glawrence13 3 days ago | 98 comments
3. Launch HN: Golpo (YC S25) – AI-generated explainer videos (video.golpoai.com)
   115 points by skar01 10 days ago | 92 comments
4. Launch HN: Embedder (YC S25) – Claude code for embedded software
   113 points by bobwei1 8 days ago | 52 comments
5. Launch HN: Uplift (YC S25) – Voice models for under-served languages
   112 points by zaidqureshi 5 days ago | 51 comments
6. Launch HN: Cyberdesk (YC S25) – Automate Windows legacy desktop apps
   73 points by mahmoud-almadi 9 days ago | 61 comments
7. Launch HN: Design Arena (YC S25) – Head-to-head AI benchmark for aesthetics
   73 points by grace77 11 days ago | 24 comments
8. Launch HN: Halluminate (YC S25) – Simulating the internet to train computer use
   70 points by wujerry2000 12 days ago | 46 comments
9. Launch HN: Parachute (YC S25) – Guardrails for Clinical AI
   62 points by ariavikram 4 days ago | 35 comments
10. Launch HN: BlankBio (YC S25) – Making RNA Programmable
    60 points by antichronology 1 day ago | 27 comments
11. Launch HN: Skope (YC S25) – Outcome-based pricing for software products
    55 points by benjsm 2 days ago | 45 comments
12. Show HN: Stagewise (YC S25) – Front end coding agent for existing codebases (github.com)
    46 points by juliangoetze 18 days ago | 50 comments
13. Launch HN: Inconvo (YC S23) – AI agents for customer-facing analytics
    38 points by ogham 1 day ago | 23 comments
14. Show HN: (YC S23) OCR that works on the messiest PDFs (www.trycardinal.ai)
    21 points by devijha 16 days ago | 2 comments
15. Show HN: April (YC S25) – Hit Inbox Zero with Just Your Voice While You Drive (apps.apple.com)
    4 points by amusely 8 days ago | 4 comments
16. Congress Launches Investigation into Flock [YC S17] (www.404media.co)
    2 points by thaumaturgy 15 days ago | discuss
17. Show HN: BrowserOS -- browser agents with GPT-OSS, local llms (github.com)
    12 points by felarof 1 day ago | 2 comments
18. Show HN: Open-source compliance-as-code for crypto projects (github.com)
    7 points by daivikgoel 28 days ago | 2 comments
19. Show HN: Term – Rust-based data validation with OpenTelemetry (github.com)
    3 points by ericpsimon 24 days ago | discuss
20. Wyndly (YC W21) Grew a Allergy Business on Reddit and YouTube (www.inc.com)
    1 points by ahstilde 12 days ago | discuss
21. Launch HN: Exa (YC S21) – The web as a database
    412 points by willbryk 4 months ago | 133 comments
22. Launch HN: GPT Driver (YC S21) – End-to-end app testing in natural language
    129 points by cschiller 10 months ago | 82 comments
23. Launch HN: Openlayer (YC S21) – Testing and Evaluation for AI
    94 points by rishramanathan over 1 year ago | 31 comments
24. Launch HN: ASim (YC S21) – Mobile app that generates mobile apps
    90 points by dli123 5 months ago | 61 comments
25. Show HN: Exa (YC S21) – embeddings search agent with >20x recall than Google (websets.exa.ai)
    28 points by willbryk 6 months ago | 4 comments
26. WorkOS acquires Warrant (YC S21) (workos.com)
    9 points by grinich over 1 year ago | discuss
27. Evidence (YC S21) – Business Intelligence as Code launches cloud, raises funding (evidence.dev)
    5 points by amcaskill almost 2 years ago | 1 comments
28. Ask HN: Why is Meticulous (YC S21) still hiring to eliminate E2E tests?
    4 points by resiros about 1 year ago | 2 comments
29. Help me getting contact with METAPHOR Founders (YC S21)
    3 points by Abrahamcarram almost 2 years ago | 1 comments
30. Show HN: Hedgehog (YC S21) On-Chain MPC Self-Custody Automations (hedgehog.app)
    2 points by cadillion over 1 year ago | 2 comments
31. Help me getting contact with Metaphor Founders (YC S21) (www.figma.com)
    1 points by Abrahamcarram almost 2 years ago | 1 comments
32. Show HN: Numscript, a declarative language to model financial transactions (playground.numscript.org)
    202 points by superzamp 11 months ago | 47 comments
33. Show HN: A mobile app that generates mobile apps in 30 secs
    10 points by dli123 8 months ago | 4 comments
34. Show HN: ASim – generate functional mobile apps instantly on your phone (asim.sh)
    10 points by dli123 12 months ago | discuss
35. Show HN: Iterate, evaluate, and monitor LLM-products in a Notion-like workspace (www.loom.com)
    9 points by ArshDilbagi over 1 year ago | discuss
36. Show HN: ASim – generate usable mobile apps instantly (asim.sh)
    5 points by dli123 11 months ago | discuss
37. Sharing Economy Thrived with Consumers but Lags in Corporate World. Until Now
    2 points by Stephen_Roamr 6 months ago | 1 comments
38. Tell HN: When to apply to Y Combinator (YC S22 alum advice)
    4 points by artembugara over 1 year ago | discuss
39. Launch HN: Airhart Aeronautics (YC S22) – A modern personal airplane
    738 points by n_ermosh about 1 year ago | 615 comments
40. Launch HN: Sorcerer (YC S24) – Weather balloons that collect more data
    365 points by tndl about 1 year ago | 172 comments
41. Launch HN: Silurian (YC S24) – Simulate the Earth
    338 points by rejuvyesh 11 months ago | 141 comments
42. Launch HN: Haystack (YC S24) – Visualize and edit code on an infinite canvas (github.com)
    328 points by akshaysg 11 months ago | 173 comments
43. Launch HN: Skyvern (YC S23) – open-source AI agent for browser automations (github.com)
    327 points by suchintan 10 months ago | 74 comments
44. Launch HN: Rosebud (YC S19) – Turn game descriptions into browser games
    293 points by lishali88 over 1 year ago | 101 comments
45. Launch HN: Undermind (YC S24) – AI agent for discovering scientific papers
    292 points by jramette about 1 year ago | 126 comments
46. Launch HN: Diversion (YC S22) – Cloud-Native Git Alternative
    280 points by sasham over 1 year ago | 423 comments
47. Launch HN: Stack Auth (YC S24) – An Open-Source Auth0/Clerk Alternative (github.com)
    280 points by n2d4 about 1 year ago | 141 comments
48. Launch HN: Muddy (YC S19) – Multiplayer browser for getting work done
    252 points by lele0108 over 1 year ago | 110 comments
49. Launch HN: Morph (YC S23) – Apply AI code edits at 4,500 tokens/sec
    217 points by bhaktatejas922 about 2 months ago | 185 comments
50. Launch HN: HyLight (YC S23) – Hydrogen airships to inspect energy infrastructure
    192 points by ThomasLaporte almost 2 years ago | 207 comments