
i make time @calcom https://xitter.gq/t.co/svpVpBOIvu 🆕: organize any event https://xitter.gq/t.co/tZMeKKYbES
Joined December 2012
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Peer Richelsen retweeted
I’ve never quite understood the appeal of software that gives you a blank canvas and building blocks to make your own tools.
I’d rather use a purpose-built product from a team whose judgment I trust, or build something custom for my exact needs.
The awkward middle ground makes you do the design work, but limits you to someone else’s building blocks.
And in companies, everyone ends up building their own systems, leaving the organization to deal with the complexity.
With AI making custom software easier to build, that tradeoff feels increasingly hard to justify
Peer Richelsen retweeted
My favorite part of being an early stage investor is forever being on the starting line
Peer Richelsen retweeted
Design engineering tip: don't let the icon float
text-box: cap alphabetic on the title, align-items: start on the row. The tile hangs from the capitals and stays put when the copy wraps
Peer Richelsen retweeted
Sorry guys. Software engineering and programming are dead. You just need to have perfect specs, unchanging requirements, an agentic deployment framework for high frequency releasing, and engineers with good taste and judgement.
Love this bit from latest @louismorgner video with @peer_rich
v6.10.8 coming in hot! 🔥
🧭 Discover: "near you" home rows, continent grouping, "Booked in <city>" counts, hourly availability checks for every listing
🤖 Agent: desktop channel, Cal Notes and calendar readers, Cal Event guest approval, team invite links, contacts and travel schedule tools
🎥 Cal Video: chat on for everyone, share audio, lobby knocks in Postgres, grid and tile polish
📅 Bookings: recurring V2 in embeds, DST-safe recurring dates, native slot formatting (up to 31% faster), seat repository work, refunded-seat release
Peer Richelsen retweeted
video with the man who makes time out now (@peer_rich).
- how they are building world class product from a random farm in germany
- how startup ideas grow out of side problems
- moving from open to closed source
was fun to hang, learned a bunch.
Peer Richelsen retweeted
October in a nutshell:
- PHP got hacked
- Railway got hacked
- OpenCode got hacked
- Binance got hacked
- Polymarket got hacked
- GitHub Actions got hacked
- SoftBank got hacked
- Cursor marketplace got hacked
- Coinbase vendor got hacked
- Fireworks AI got hacked
- LiteLLM got hacked
- Capcom got hacked
- npm packages got hacked
- TiDB Cloud got hacked
- Warp's vendor got hacked
happy cybersecurity awareness month
Peer Richelsen retweeted
Introducing agent-desktop
agent-browser, for your whole computer
→ Computer Use for any coding agent
→ macOS, Windows and Linux
→ Runs in bg while you keep working
→ Agents use your computer in parallel, each with its own cursor
Peer Richelsen retweeted
a customer built scheduling in-house because they only need 1% of cal. "pay me a subscription and i give you my code" won't work in 2-5 years. @etnshow
Peer Richelsen retweeted
when I first started @railblocks I used to obsessively map all the systems I managed for clients in whimsical, and would spend an ungodly amount of time keeping them up to date
now we have agents whip up fully interactive and animated maps that look 1000x better, are more useful, and can be updated in minutes
what a time to be alive
Peer Richelsen retweeted
Excited to share Genie 4 today our most realistic and interactive world model:
- steer dynamic environments in real time, shaping events, camera angles, and actions
- generate native audio matched to the world, from realistic background sounds to characters who can converse in real time!
- simulate photorealistic scenes and real-world physics
- create more coherent multi-step events through reasoning from Gemini
We've started to roll out as a research preview to trusted testers. Coming soon to Google AI Ultra subscribers in Project Genie and early access partners via the Gemini API and AI Studio.
GM. Mega show today. Here's the line up:
- Jonathan Balls (Racket Club)
- @Ed__Johns & @vitalisvos19 (Machenta)
- @MarkSwan_ (Nevis)
- @michael_baj & Qian (Zaro)
- @peer_rich (Cal dot com)
- @_Xaviercollins_ (Wonder Studios)
- @bercankilic (microagi)
- @MadisonMills22 (Axios)
See you on the show.
Anthropic S-1 Review | Buyouts The New Layoff | Millionaire Day | Mega Show xitter.gq/i/broadcasts/1nxeLMNqV…
Join @peer_rich in 6 minutes xitter.gq/i/broadcasts/1nxeLMNqV…
BREAKING: @calcom Co-Founder & CEO Peer Richelsen (@peer_rich) joins Luke and Ronan in The Arena at 2:00 PM GMT today.
Netflix didnt want our documentary so we shipped our own
All 3 Episodes live on CalFlix
#calflixandchill
v0-calflix.vercel.app/
SITUATION DETECTED: Following the massive cyberattack on Japan's GMO Internet Group, which led to fraudulent trades across 70+ brokerages and FX platforms, CEO Masatoshi Kumagai warns that the internet itself is on the verge of collapse.
Peer Richelsen retweeted
You open Slack. Looking for a convo you had with someone 5 months ago. You ask your coworker if they know where it is. They don't. Search doesn't work.
You wince as you click Slackbot and emotionally prepare yourself for the bot to swing and miss.
Slackbot proudly surfaces the chat you just had with your coworker about trying to find the convo. Thanks Slackbot.
You realize Slack hasn't really evolved much since AI entered the scene. How could that be, you wonder.
Then you come across this post on X, and it all makes sense: "eaten by whale".
Latest (and probably penultimate) Building Slack post is up: buildingslack.com/salesforce…
What it's like being eaten by the whale





















