Best of YC S21


best of all time best of today best of yesterday best of this week best of this month best of last month best of this year best of 2024 best of 2023 best of 2023 yc s25 yc w25 yc s24 yc w24 yc s23 yc w23 yc s22 yc w22 yc s21 yc w21 yc s20 yc w20 yc s19 yc w19 yc s18 yc w18 yc all-time 3d algorithms animation android [ai] artificial-intelligence api augmented-reality big data bitcoin blockchain book bootstrap bot css c chart chess chrome extension cli command line compiler crypto covid-19 cryptography data deep learning elexir ether excel framework game git go html ios iphone java js javascript jobs kubernetes learn linux lisp mac machine-learning most successful neural net nft node optimisation parser performance privacy python raspberry pi react retro review my ruby rust saas scraper security sql tensor flow terminal travel virtual reality visualisation vue windows web3 young talents
#1 Launch HN: Heimdal (YC S21) – Carbon neutral cement

617 points | 220 comments | Aug 02, 2021 | by marcuslima

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#2 Launch HN: Lago (YC S21) – Open-source usage-based billing

442 points | 141 comments | Feb 13, 2023 | by Rafsark

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#3 Launch HN: Exa (YC S21) – The web as a database

412 points | 133 comments | May 06, 2025 | by willbryk

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#4 Launch HN: Slip (YC S21) – Build and sell interactive programming courses

399 points | 108 comments | Aug 11, 2021 | by CoffeePython

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#5 Launch HN: Micro Meat (YC S21) – Technology for scaling cultivated meat

390 points | 194 comments | Mar 10, 2022 | by asmertgen

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#6 Launch HN: BlackOakTV (YC S21) – Netflix for black people

377 points | 741 comments | Aug 06, 2021 | by Uzo0312

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#7 Launch HN: Hotswap (YC S21) – Easily migrate customers away from competitors

345 points | 152 comments | Aug 27, 2021 | by memset

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#8 Launch HN: Buoyant (YC S21) – Blimp drones for air freight

302 points | 173 comments | Aug 23, 2021 | by joefigura

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#9 Launch HN: Govly (YC S21) – Making it easier to sell to the U.S. government

274 points | 112 comments | Aug 18, 2021 | by mikeweiland

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#10 Launch HN: Bloop (YC S21) – Code Search with GPT-4

264 points | 125 comments | Mar 20, 2023 | by louiskw

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#11 Launch HN: Evidence (YC S21) – Web framework for data analysts

263 points | 91 comments | Aug 25, 2021 | by amcaskill

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Don't miss when the next Dropbox or Stripe launches



#12 Launch HN: Enso (YC S21) – Visual programming and workflow automation tool

205 points | 54 comments | Jul 06, 2021 | by wdanilo

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#13 Launch HN: Atmana (YC S21) – An app to help cut down on compulsive porn usage

202 points | 182 comments | Jul 27, 2021 | by zero_billion

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#14 Launch HN: InstaKin (YC S21) - Help immigrants to manage tasks in home countries

202 points | 69 comments | Jul 26, 2021 | by yshirazi

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#15 Launch HN: Turion Space (YC S21) – Space debris removal and satellite servicing

200 points | 111 comments | Aug 04, 2021 | by rwesterdahl

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#16 Launch HN: Flow Club (YC S21) – Virtual co-working space for focused work

184 points | 75 comments | Aug 18, 2021 | by rickyyean

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#17 Launch HN: Inflow (YC S21) – Self-help app for people with ADHD

183 points | 324 comments | Oct 15, 2021 | by sebisaacsinflow

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#18 Launch HN: Bedrock AI (YC S21) – Using ML to identify red flags in SEC filings

183 points | 107 comments | Jul 20, 2021 | by kbennatti

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#19 Launch HN: Senpai.gg (YC S21) – Personal gaming coach for PC gamers

182 points | 207 comments | Aug 11, 2021 | by berkozer

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#20 Launch HN: Charge Robotics (YC S21) - Robots that build solar farms

169 points | 81 comments | Mar 23, 2022 | by justicz

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#21 Launch HN: SigmaOS (YC S21) – A MacOS web browser designed for faster work

161 points | 325 comments | Aug 16, 2021 | by MahyadGhassemi

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#22 Launch HN: Helio Sleep (YC S21) – One-stop portal for sleep apnea

158 points | 185 comments | Mar 22, 2022 | by maxgreenfeld

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#23 Launch HN: Hedgehog (YC S21) – Cryptocurrency Portfolio Manager

158 points | 137 comments | Jun 18, 2021 | by cadillion

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#24 Launch HN: Argonaut (YC S21) – Easily Deploy Apps and Infra to AWS and GCP

152 points | 76 comments | Jun 26, 2023 | by suryao

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#25 Launch HN: Epsilon3 (YC S21) – Software for spacecraft and complex operations

149 points | 62 comments | Jul 21, 2021 | by llcrabtree

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#26 Launch HN: Patterns (YC S21) – A much faster way to build and deploy data apps

149 points | 36 comments | Nov 30, 2022 | by kvh

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#27 Launch HN: Hypercontext (YC S21) – Meeting notes, actions, and OKRs in one app

145 points | 60 comments | Jul 19, 2021 | by brennanm

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#28 Launch HN: hotglue (YC S21) – Easy user-facing SaaS integrations

144 points | 61 comments | Jul 22, 2021 | by hsyyid

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#29 Launch HN: Abbot (YC S21) – ChatOps as a Service, inspired by GitHub's Hubot

143 points | 36 comments | Jul 27, 2021 | by icey

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#30 Launch HN: Spoken (YC S21) – Better furniture shopping

132 points | 118 comments | Mar 21, 2022 | by lgabraham

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#31 Launch HN: Rootly (YC S21) – Manage Incidents in Slack

132 points | 93 comments | Jun 07, 2022 | by kwent

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#32 Launch YC S21: Meet the Batch, Thread #4

130 points | 161 comments | Aug 05, 2021 | by dang

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#33 Launch HN: Metlo (YC S21) – Open-source software for securing your APIs

130 points | 34 comments | Nov 09, 2022 | by shrisukhani

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#34 Launch HN: GPT Driver (YC S21) – End-to-end app testing in natural language

129 points | 82 comments | Oct 23, 2024 | by cschiller

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#35 Launch HN: Shimmer (YC S21) – ADHD coaching for adults

127 points | 254 comments | Nov 04, 2022 | by christalwang

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#36 Launch HN: Litnerd (YC S21) – Teaching kids to read with the help of live actors

127 points | 92 comments | Aug 25, 2021 | by Anisa_Mirza

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#37 Launch HN: MergeQueue (YC S21) – Automate rebasing and merging for your codebase

122 points | 57 comments | Jul 16, 2021 | by spriha

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#38 Launch HN: Meticulous (YC S21) – Catch JavaScript errors before they hit prod

122 points | 40 comments | May 02, 2022 | by Gabriel_h

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#39 Launch YC S21: Meet the Batch, Thread #5

116 points | 121 comments | Aug 10, 2021 | by dang

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#40 Launch HN: Hera (YC S21) – macOS app to prepare, join and take notes in meetings

116 points | 115 comments | Jul 08, 2021 | by brunovegreville

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#41 Launch HN: Warrant (YC S21) – Authorization and access control as a service

115 points | 60 comments | Jul 27, 2022 | by akajla

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#42 Launch HN: Onfolk (YC S21) – Modern HR and Payroll in One Place (For the UK)

113 points | 34 comments | Jul 14, 2021 | by 4thstreet

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#43 Launch HN: Pabio (YC S21) – Interior design and furniture rental as a service

112 points | 103 comments | Jul 09, 2021 | by anandchowdhary

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#44 Launch HN: Dots (YC S21) – Bot Builder for Discord

112 points | 34 comments | Nov 17, 2022 | by sanketc

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#45 Launch HN: Awesomic (YC S21) – Get design tasks done with 24-hour turnaround

111 points | 57 comments | Aug 16, 2021 | by Pavlyshyna

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best of all time best of today best of yesterday best of this week best of this month best of last month best of this year best of 2024 best of 2023 yc s25 yc w25 yc s24 yc w24 yc s23 yc w23 yc s22 yc w22 yc s21 yc w21 yc s20 yc w20 yc s19 yc w19 yc s18 yc w18 yc all-time 3d algorithms animation android [ai] artificial-intelligence api augmented-reality big data bitcoin blockchain book bootstrap bot css c chart chess chrome extension cli command line compiler crypto covid-19 cryptography data deep learning elexir ether excel framework game git go html ios iphone java js javascript jobs kubernetes learn linux lisp mac machine-learning most successful neural net nft node optimisation parser performance privacy python raspberry pi react retro review my ruby rust saas scraper security sql tensor flow terminal travel virtual reality visualisation vue windows web3 young talents

andrey azimov by Andrey Azimov