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: Nori Robotics (YC S26) – A low-cost humanoid robot for development (www.norirobotics.com)
   201 points by AntonioLi 16 days ago | 66 comments
2. Launch HN: RonanRX (YC S26) – Personalized Peptides and GLP-1s
   119 points by lloydarmbrust 15 days ago | 82 comments
3. Launch HN: OneCLI (YC S26) – OSS sandboxed agent harness for teams (github.com)
   88 points by guyb3 29 days ago | 37 comments
4. Launch HN: machine0 (YC S26) – Persistent CPU and GPU VMs from the CLI (machine0.io)
   83 points by bwm 30 days ago | 44 comments
5. Launch HN: Vendo (YC S26) – Let users build features on top of your product (github.com)
   61 points by yousefh409 28 days ago | 22 comments
6. Launch HN: Almanac (YC S26) – AI that knows your company (usealmanac.com)
   59 points by kushagrchitkar 17 days ago | 48 comments
7. Launch HN: Risklytics (YC S26) – Insurance brokerage for frontier tech companies (www.risklytics.ai)
   54 points by AlexRisio 22 days ago | 25 comments
8. Launch HN: Salem Robotics (YC S26) – Software for industrial inspection robots
   49 points by Salem_robotics 21 days ago | 31 comments
9. Launch HN: Hebbian Robotics (YC S26) – Build scalable robotics data pipelines (github.com)
   46 points by kstonekuan 17 days ago | 12 comments
10. Launch HN: Mireye (YC S26) – Infrastructure for Physical World AI Agents
    28 points by anshchokshi 14 days ago | 8 comments
11. Flock (YC S17) dumped by Boston for sharing data in violation of contract (arstechnica.com)
    10 points by tastyface about 18 hours ago | 1 comments
12. Langdock (YC S23) moves from a US corporation to a European company (europe.langdock.com)
    9 points by ppati000 1 day ago | 2 comments
13. Dioxus Labs (YC S23) Is Joining Cognition (dioxuslabs.com)
    8 points by ninjha 7 days ago | 1 comments
14. Show HN: Nari Qwen3-TTS and Qwen3-ASR – High accuracy, low latency and cost (narilabs.com)
    90 points by toebee 3 days ago | 31 comments
15. Show HN: Proliferate- open-source, self-hostable Codex for any coding agent (github.com)
    46 points by pablo24602 27 days ago | 16 comments
16. Show HN: Maxxwell – The IDE for Optimal Tokenmaxxing (maxxwell.dev)
    11 points by mys1 8 days ago | 8 comments
17. Show HN: Open Session, the open-source cloud agent-orchestrator (www.opensession.com)
    3 points by 9ranty 21 days ago | discuss
18. Launch HN: Exa (YC S21) – The web as a database
    412 points by willbryk over 1 year ago | 133 comments
19. Launch HN: GPT Driver (YC S21) – End-to-end app testing in natural language
    129 points by cschiller almost 2 years ago | 82 comments
20. Launch HN: ASim (YC S21) – Mobile app that generates mobile apps
    90 points by dli123 over 1 year ago | 61 comments
21. Launch HN: Indy (YC S21) – A support app designed for ADHD brains (www.shimmer.care)
    85 points by christalwang 8 months ago | 93 comments
22. 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
23. Show HN: Numscript, a declarative language to model financial transactions (playground.numscript.org)
    202 points by superzamp almost 2 years ago | 47 comments
24. Launch HN: Runtime (YC P26) – Sandboxed coding agents for everyone on a team (www.runtm.com)
    103 points by gustrigos 4 months ago | 30 comments
25. Show HN: Open-source distributed quantum compute network (quip.network)
    11 points by cadillion 6 months ago | 10 comments
26. Show HN: A mobile app that generates mobile apps in 30 secs
    10 points by dli123 almost 2 years ago | 4 comments
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 about 1 year 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 12 months ago | 1 comments
31. Launch HN: Cactus (YC S25) – AI inference on smartphones (github.com)
    123 points by HenryNdubuaku 12 months ago | 63 comments
32. 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
33. Launch HN: Skyvern (YC S23) – open-source AI agent for browser automations (github.com)
    327 points by suchintan almost 2 years ago | 74 comments
34. Launch HN: Hyprnote (YC S25) – An open-source AI meeting notetaker
    270 points by yujonglee about 1 year ago | 180 comments
35. Launch HN: ProvenMetal (YC S26) delivers circuit boards in days instead of weeks (provenmetal.com)
    237 points by willcarkner about 1 month ago | 156 comments
36. Launch HN: Morph (YC S23) – Apply AI code edits at 4,500 tokens/sec
    217 points by bhaktatejas922 about 1 year ago | 185 comments
37. Launch HN: Bitrig (YC S25) – Build Swift apps on your iPhone
    188 points by kylemacomber about 1 year ago | 122 comments
38. Launch HN: Continue (YC S23) – Create custom AI code assistants (hub.continue.dev)
    178 points by sestinj over 1 year ago | 110 comments
39. Launch HN: AgentMail (YC S25) – An API that gives agents their own email inboxes
    169 points by Haakam21 8 months ago | 169 comments
40. Launch HN: Modern Realty (YC S24) – AI Real Estate Agent for Home Buyers
    153 points by greenfish6 almost 2 years ago | 305 comments
41. Launch HN: Omnara (YC S25) – Run Claude Code and Codex from anywhere
    147 points by kmansm27 7 months ago | 161 comments
42. Launch HN: Channel3 (YC S25) – A database of every product on the internet
    147 points by glawrence13 about 1 year ago | 99 comments
43. Launch HN: Phind 3 (YC S22) – Every answer is a mini-app
    138 points by rushingcreek 10 months ago | 94 comments
44. Launch HN: Azalea Robotics (YC S24) – Baggage-handling robots for airports
    132 points by dmillard almost 2 years ago | 80 comments
45. Launch HN: Nia (YC S25) – Give better context to coding agents (www.trynia.ai)
    131 points by jellyotsiro 9 months ago | 87 comments
46. Launch HN: Bullet (YC S26) – A Faster Coding Agent (www.codewithbullet.com)
    121 points by adi1 about 1 month ago | 89 comments
47. Launch HN: Midship (YC S24) – Turn PDFs, docs, and images into usable data
    121 points by maxmaio almost 2 years ago | 61 comments