At our previous company, engineers shipped code during their lunch break on Cursor, while the rest of the team literally burnt out from grinding pointless manual work.
That didn’t sit right with us.
We built Den because everyone deserves 10x leverage on their time.
Den is a beautiful union of Slack/Notion that brings your agents, teammates, and tools together in one place, and makes it dead simple to create AI agents.
Our dream is to deliver billions of agents into the workforce and unlock the most productive/abundant era in human history.
I've heard someone on X using this. Ya'll legit doing something that every company desire. We aren't supposed to work like humans have worked for previous decade. Good luck @justin_lee27@linus_talacko1
@pritraveler I wholeheartedly agree there, the slack canvas system feels kind of questionable and jarring at best, it's meant to be efficient but.. isn't? Like at all? I'm so excited that Den just makes everything nice to use again, it's such a neat idea that they've come up with
@smith_at_atlas Same though, but Slack was more of a like/tolerate than a love. Den looks like something I'd actually enjoy using for extended periods of time with my classmates and team, which Slack is not lol
DEN: A Revolutionary Workspace That Will Transform How You Work
Having spent the last month using DEN, I can confidently say it's one of the most transformative productivity tools I've encountered in years. This YC-backed company has created something truly special - a platform that seamlessly blends communication, documentation, and AI agents into one cohesive workspace.
The Perfect Union of Slack and Notion
What immediately struck me about DEN was how it elegantly combines the best aspects of Slack's real-time communication with Notion's organizational capabilities. The interface is clean and intuitive, making the learning curve surprisingly gentle despite the platform's powerful capabilities.
Unlike other tools that feel cobbled together, DEN was clearly designed from the ground up with a unified vision. Everything feels intentional and purposeful. The workspace flows naturally from conversations to documents to automated workflows without the jarring context switches we've grown accustomed to in our fragmented digital workspaces.
AI Agents That Actually Deliver
Let's talk about what truly sets DEN apart: their implementation of AI agents. While many platforms are racing to add AI features, DEN has created something that feels genuinely useful rather than gimmicky.
Creating custom agents in DEN is remarkably straightforward. The platform guides you through the process with clear prompts and templates, making it accessible even to team members without technical backgrounds. Within minutes, I had created agents to:
Summarize lengthy discussion threads and extract action items
Monitor project channels and compile daily progress reports
Automatically organize and tag incoming documents
Create first drafts of routine communications
These agents consistently delivered high-quality results that required minimal human refinement. The time savings were immediate and substantial.
A New Paradigm for Productivity
What's most impressive about DEN is how it fundamentally changes your relationship with work. By automating routine tasks and streamlining workflows, it creates space for deeper, more meaningful work.
This isn't just about saving time—it's about reclaiming the mental bandwidth that's typically consumed by context switching and administrative overhead. With DEN, I found myself able to focus on creative problem-solving and strategic thinking in ways that weren't possible before.
The founders, Linus and Justin, clearly understand the pain points of modern knowledge work at a deep level. Their vision of delivering "10x leverage on time" isn't hyperbole—it's precisely what DEN provides.
Seamless Team Adoption
Introducing new tools often comes with significant adoption challenges, but DEN handles this exceptionally well. The platform's intuitive design and thoughtful onboarding process made it easy for our entire team to get up to speed quickly.
What's particularly valuable is how DEN adapts to different work styles. Team members can engage with the platform in ways that suit their preferences while still maintaining cohesion across the organization. This flexibility significantly reduced the resistance that typically accompanies new tool adoption.
Beyond Productivity: Creating a Healthier Work Culture
Perhaps the most profound impact of DEN has been on our team's overall well-being. By eliminating much of the "grinding pointless manual work" that the founders reference, DEN has noticeably reduced burnout across our organization.
Team members report feeling more engaged and fulfilled, with the platform enabling them to focus on work that actually matters. The efficiency gains haven't led to cramming in more work—they've created space for more thoughtful, sustainable productivity.
Continuous Innovation
In the relatively short time we've been using DEN, the platform has already evolved in meaningful ways. The development team is clearly attentive to user feedback, with regular updates that address pain points and expand functionality.
This rapid iteration inspires confidence that DEN will continue to improve and adapt to changing workplace needs. The roadmap they've shared suggests exciting developments ahead that will further enhance the platform's capabilities.
The Future of Work is Here
DEN represents nothing less than a new vision for how work should function in the digital age. It recognizes that true productivity isn't about doing more things—it's about doing the right things while eliminating unnecessary friction.
The founders' dream of "delivering billions of agents into the workforce and unlocking the most productive/abundant era in human history" might sound ambitious, but after experiencing DEN firsthand, it feels entirely achievable.
For teams struggling with fragmented tools, communication overload, and the burden of repetitive tasks, DEN offers a compelling solution that delivers on its promises. It's not just another productivity tool—it's a fundamental reimagining of the digital workspace.
If you're looking to transform how your team works, eliminate burnout, and reclaim hours of your day for meaningful work, DEN deserves your immediate attention. It's rare to find a product that so completely delivers on its promise to revolutionize work, but DEN has done exactly that.
@finnlay_morcombe I’ve been waiting for something like this. It’s not just “another tool” and it feels like someone finally got it. Everything just flows?? The AI agents actually do things, and the whole experience feels like the future we were promised. Big W all around.
@tomvanderlinden I just started using slack this year since some of my courses demanded it, but now I want my profs and clubs to all switch to this, the vibes on slack are not it. Hopefully this becomes widely adopted ^^
I think you're working with a very good concept. You're using a visual that's almost similar to Notion, so it'll be a more familiar environment for people. A great chance to win over users based on their usage habits. 😅 Are you going to create a downloadable version as well? (not just a browser version)
Great job guys, I think Den can seamlessly integrate into my workflow as a powerful AI knowledge sidekick, hopefully you will launch your desktop soon!
@justin_bao@justin_lee27 I mean.. having at least a public-facing roadmap is a pretty good way to get the hype train going before releasing new features and platforms and whatnot!!
Den is awesome! We're getting buried by AI-enabled point solutions and Den is a breath of fresh air. Integrates with everything we need. Pulls data and automates exactly as we need it to. Knowledge repo, automation tool, chat, and collaboration all built into 1 fron the ground up. You can finally really build powerful workflows in natural language. Den is great! Also, @linus_talacko1 and @justin_lee27 are absolute operators.
@justin_lee27@karrwinn thanks so much James! It's been awesome to have you on the product! Your feedback has been incredibly helpful, and we can't wait to make the product even more powerful for you.
@courtney_may_aspegren The tool switching fatigue is so real, this feels like a breath of fresh air. Not being punished for having information I need to keep handy/organized for once is such a nice concept
As a knowledge worker juggling multiple projects and information sources, Den has become my digital command center. Been testing it since launch, and it's like having a smart assistant that actually understands context. The fact that Y Combinator uses it speaks volumes about its capabilities.
The "cursor for knowledge workers" description clicked for me yesterday when I was researching a complex market analysis. Instead of jumping between dozens of tabs and documents, Den helped me navigate through information like a cursor through code - precise, contextual, and intelligent. Found insights in minutes that would have taken hours to piece together manually.
What really sets it apart is how it learns your work patterns. This morning, it anticipated the resources I needed for a strategy meeting based on my calendar event and previous similar meetings. The AI doesn't just find information - it understands how you use it and adapts accordingly.
@xi_z No but I desperately needed this in my life. I consider myself organized, but until now that meant tons of slack channels, canvases, different places to store information. Sure it was tidy but that was so impractical for daily use, I'm so hyped that there's something that does all this now! Hard agree that YC using is is a huge win, incredibly impressive.
I had the pleasure of working with the Den team and founders on their product intro video and it was an amazing experience. No one else could bring this to life better than them. As someone who’s never liked Slack, I’m genuinely excited about this product. The care and thought they’ve put into it is unlike anything I’ve seen before. It's truly something special.
Just from chatting with the team and diving into the features and content, I’m so hyped. Den isn’t just a new platform, it feels like a whole new way to work. You can feel the care that went into it, and it actually seems so fun to use. Now I just need to convince my team and uni courses lol. Game changer fr.
Think of Den as your dad’s very own personal assistant that never clocks out—like Slack, Notion, and a team of interns all rolled into one (minus the coffee runs). He’ll wonder how he ever survived half a century without it!
@marco_dewey thanks Marco! We think that augmenting the work that humans are doing, rather than replacing it is the best way for AI agents to collaborate with humans.
@pupposandro thanks so much Alessandro! We can't wait to incorporate some sort of computer-use into Den, and would be really keen to make Cua our default solution ;)
Replies
Den
At our previous company, engineers shipped code during their lunch break on Cursor, while the rest of the team literally burnt out from grinding pointless manual work.
That didn’t sit right with us.
We built Den because everyone deserves 10x leverage on their time.
Den is a beautiful union of Slack/Notion that brings your agents, teammates, and tools together in one place, and makes it dead simple to create AI agents.
Our dream is to deliver billions of agents into the workforce and unlock the most productive/abundant era in human history.
Watch the official launch video here.
—Linus & Justin
SyncSignature
I've heard someone on X using this. Ya'll legit doing something that every company desire. We aren't supposed to work like humans have worked for previous decade. Good luck @justin_lee27 @linus_talacko1
Den
@justin_lee27 @neelptl2602 thanks so much Neel! We couldn't agree more :)
Den
@linus_talacko1 @neelptl2602 The final SaaS. That is literally the plan. Thanks Neel :)
@linus_talacko1 @neelptl2602 @justin_lee27 Wait the final SaaS is such a power name, please continue to use that it's so good!
SyncSignature
There is canvas in slack, but it doesn't really make me feel like the chats and the docs are connected.
But Den makes them synchronized, so that the workers feel like they're sharing their brains!
Congratulations :)
Den
@pritraveler thanks so much Yong Woo Shin!!
Den
@pritraveler Exactly. I'm glad you can see our vision! Thank you so much Yong.
@pritraveler I wholeheartedly agree there, the slack canvas system feels kind of questionable and jarring at best, it's meant to be efficient but.. isn't? Like at all? I'm so excited that Den just makes everything nice to use again, it's such a neat idea that they've come up with
@pritraveler @henrietta_vanniekerk #Truth
I love Notion. I love Slack. This looks like such a great combination. Congrats on the launch! :-)
Den
A harmony of two legendary products. thank you @smith_at_atlas
Den
@smith_at_atlas thanks so much Smith! We'd love for you to try it out! Looking forward to your launch :)
@smith_at_atlas It's much better than Slack.
@smith_at_atlas @karan_vaidya yup
@smith_at_atlas Same though, but Slack was more of a like/tolerate than a love. Den looks like something I'd actually enjoy using for extended periods of time with my classmates and team, which Slack is not lol
Fluency
DEN: A Revolutionary Workspace That Will Transform How You Work
Having spent the last month using DEN, I can confidently say it's one of the most transformative productivity tools I've encountered in years. This YC-backed company has created something truly special - a platform that seamlessly blends communication, documentation, and AI agents into one cohesive workspace.
The Perfect Union of Slack and Notion
What immediately struck me about DEN was how it elegantly combines the best aspects of Slack's real-time communication with Notion's organizational capabilities. The interface is clean and intuitive, making the learning curve surprisingly gentle despite the platform's powerful capabilities.
Unlike other tools that feel cobbled together, DEN was clearly designed from the ground up with a unified vision. Everything feels intentional and purposeful. The workspace flows naturally from conversations to documents to automated workflows without the jarring context switches we've grown accustomed to in our fragmented digital workspaces.
AI Agents That Actually Deliver
Let's talk about what truly sets DEN apart: their implementation of AI agents. While many platforms are racing to add AI features, DEN has created something that feels genuinely useful rather than gimmicky.
Creating custom agents in DEN is remarkably straightforward. The platform guides you through the process with clear prompts and templates, making it accessible even to team members without technical backgrounds. Within minutes, I had created agents to:
Summarize lengthy discussion threads and extract action items
Monitor project channels and compile daily progress reports
Automatically organize and tag incoming documents
Create first drafts of routine communications
These agents consistently delivered high-quality results that required minimal human refinement. The time savings were immediate and substantial.
A New Paradigm for Productivity
What's most impressive about DEN is how it fundamentally changes your relationship with work. By automating routine tasks and streamlining workflows, it creates space for deeper, more meaningful work.
This isn't just about saving time—it's about reclaiming the mental bandwidth that's typically consumed by context switching and administrative overhead. With DEN, I found myself able to focus on creative problem-solving and strategic thinking in ways that weren't possible before.
The founders, Linus and Justin, clearly understand the pain points of modern knowledge work at a deep level. Their vision of delivering "10x leverage on time" isn't hyperbole—it's precisely what DEN provides.
Seamless Team Adoption
Introducing new tools often comes with significant adoption challenges, but DEN handles this exceptionally well. The platform's intuitive design and thoughtful onboarding process made it easy for our entire team to get up to speed quickly.
What's particularly valuable is how DEN adapts to different work styles. Team members can engage with the platform in ways that suit their preferences while still maintaining cohesion across the organization. This flexibility significantly reduced the resistance that typically accompanies new tool adoption.
Beyond Productivity: Creating a Healthier Work Culture
Perhaps the most profound impact of DEN has been on our team's overall well-being. By eliminating much of the "grinding pointless manual work" that the founders reference, DEN has noticeably reduced burnout across our organization.
Team members report feeling more engaged and fulfilled, with the platform enabling them to focus on work that actually matters. The efficiency gains haven't led to cramming in more work—they've created space for more thoughtful, sustainable productivity.
Continuous Innovation
In the relatively short time we've been using DEN, the platform has already evolved in meaningful ways. The development team is clearly attentive to user feedback, with regular updates that address pain points and expand functionality.
This rapid iteration inspires confidence that DEN will continue to improve and adapt to changing workplace needs. The roadmap they've shared suggests exciting developments ahead that will further enhance the platform's capabilities.
The Future of Work is Here
DEN represents nothing less than a new vision for how work should function in the digital age. It recognizes that true productivity isn't about doing more things—it's about doing the right things while eliminating unnecessary friction.
The founders' dream of "delivering billions of agents into the workforce and unlocking the most productive/abundant era in human history" might sound ambitious, but after experiencing DEN firsthand, it feels entirely achievable.
For teams struggling with fragmented tools, communication overload, and the burden of repetitive tasks, DEN offers a compelling solution that delivers on its promises. It's not just another productivity tool—it's a fundamental reimagining of the digital workspace.
If you're looking to transform how your team works, eliminate burnout, and reclaim hours of your day for meaningful work, DEN deserves your immediate attention. It's rare to find a product that so completely delivers on its promise to revolutionize work, but DEN has done exactly that.
Den
@finnlay_morcombe thanks Finnlay! Appreciate you taking the energy and effort to write this post out :)
Den
@finnlay_morcombe Appreciate you handwriting this entire post, and definitely not generating it on Den
@finnlay_morcombe I’ve been waiting for something like this. It’s not just “another tool” and it feels like someone finally got it. Everything just flows?? The AI agents actually do things, and the whole experience feels like the future we were promised. Big W all around.
Damn this is sick, the founders seem pretty cool too. Great reason to get rid of Slack, shit sucks.
Den
@tomvanderlinden Thanks Tom! Glad to have you as one of our earliest users :)
@linus_talacko1 it's been an absolute please Linus!
Den
@tomvanderlinden Watch your profanity! But thank you Tom. So glad to have you.
@justin_lee27 🤪
@tomvanderlinden Great, that's what we are doing
@karan_vaidya your CEO must be pretty smart ;)
@tomvanderlinden I just started using slack this year since some of my courses demanded it, but now I want my profs and clubs to all switch to this, the vibes on slack are not it. Hopefully this becomes widely adopted ^^
@henrietta_vanniekerk vibes are everything, and the den vibes are good vibes. Tell your profs to wake up!
Den brings Cursor-like power to knowledge work—streamlining how teams search, think, and collaborate.
Den
@supa_l It does! Thanks for the comment Supa!
Den
@supa_l We sure do! Thank you for the support Supa
minimalist phone: creating folders
I think you're working with a very good concept. You're using a visual that's almost similar to Notion, so it'll be a more familiar environment for people. A great chance to win over users based on their usage habits. 😅 Are you going to create a downloadable version as well? (not just a browser version)
Den
@busmark_w_nika Thanks for the comment Nika!
We have a desktop app launching next week, and a mobile app shortly after :)
minimalist phone: creating folders
@linus_talacko1Sounds good! Wish you GL! :)
Den
@busmark_w_nika thank you!
minimalist phone: creating folders
@linus_talacko1 You are welcome! :)
@busmark_w_nika @linus_talacko1 That's so soon?? Best of luck and double congrats apparently woah
Den
@busmark_w_nika That's our thinking too! It's ambitious, but it's worthy. Thank you so much Nika.
minimalist phone: creating folders
@justin_lee27 You are welcome! I keep my fingers crossed for you! :)
Great job guys, I think Den can seamlessly integrate into my workflow as a powerful AI knowledge sidekick, hopefully you will launch your desktop soon!
Den
@justin_bao Desktop is shipping tomorrow 🚢
appreciate your support Justin :)
@justin_lee27 This is amazing—can’t wait to see what’s next for Den!
Den
@justin_bao would you want to be able to see our roadmap? we're thinking of open sourcing it
@justin_bao @justin_lee27 I mean.. having at least a public-facing roadmap is a pretty good way to get the hype train going before releasing new features and platforms and whatnot!!
Den is awesome! We're getting buried by AI-enabled point solutions and Den is a breath of fresh air. Integrates with everything we need. Pulls data and automates exactly as we need it to. Knowledge repo, automation tool, chat, and collaboration all built into 1 fron the ground up. You can finally really build powerful workflows in natural language. Den is great! Also, @linus_talacko1 and @justin_lee27 are absolute operators.
Den
@justin_lee27 @karrwinn thanks so much James! It's been awesome to have you on the product! Your feedback has been incredibly helpful, and we can't wait to make the product even more powerful for you.
Den
@linus_talacko1 @karrwinn It's been so incredible having you along for the ride James, thank you. And yes—we operate 🦾
I really like Den and think it's so needed. It makes everything feel connected and helps fatigue from tool switching go away for GTM folks like me!
Den
@courtney_may_aspegren thanks so much Courtney, it has been really great to have you onboard!
Den
@courtney_may_aspegren Yeah, the average knowledge worker switches to a different SaaS app once a minute. It's crazy.
@courtney_may_aspegren The tool switching fatigue is so real, this feels like a breath of fresh air. Not being punished for having information I need to keep handy/organized for once is such a nice concept
Wavedash
@Den saved my life. I can barely recall the world before Den
Actually, though, just try it. Try it. You'll like it
Den
@kylerblue thanks Kyler! It's been really amazing having you and wavedash onboard! Looking forward to making it even better for you :)
Den
@kylerblue Life pre-Den, couldn't wish for anything worse. Seriously cannot WAIT for the @Wavedash launch.
Chance AI
As a knowledge worker juggling multiple projects and information sources, Den has become my digital command center. Been testing it since launch, and it's like having a smart assistant that actually understands context. The fact that Y Combinator uses it speaks volumes about its capabilities.
The "cursor for knowledge workers" description clicked for me yesterday when I was researching a complex market analysis. Instead of jumping between dozens of tabs and documents, Den helped me navigate through information like a cursor through code - precise, contextual, and intelligent. Found insights in minutes that would have taken hours to piece together manually.
What really sets it apart is how it learns your work patterns. This morning, it anticipated the resources I needed for a strategy meeting based on my calendar event and previous similar meetings. The AI doesn't just find information - it understands how you use it and adapts accordingly.
Den
@xi_z Thanks so much for this really lovely comment Xi! We have loved having you as an early user of Den!
Den
@xi_z Wow, seems like you really tried all the Den features. Thanks for your support Xi :)
@xi_z No but I desperately needed this in my life. I consider myself organized, but until now that meant tons of slack channels, canvases, different places to store information. Sure it was tidy but that was so impractical for daily use, I'm so hyped that there's something that does all this now! Hard agree that YC using is is a huge win, incredibly impressive.
Can't wait for slack to end! Den's taking care of our entire ops department
Den
@sam_lamba this is great to hear Sam! It's been great having you onboard!
Den
@sam_lamba The ENTIRE ops department?
@sam_lamba @justin_lee27 The ENTIRE ops department!! (apparently)
yep feels like we hired an ops team that lives in Slack
this makes the canvas in slack feel so archaic
Den
@danielterrero thanks so much Daniel! We are hoping to make our documents that most simple and most aesthetic that anyone can use.
Den
@danielterrero Archaic is definitely the right word - I've been trying to put my finger on why, do you have any ideas?
@danielterrero No literally, that's exactly the right word?? Den just hits different lmao
I had the pleasure of working with the Den team and founders on their product intro video and it was an amazing experience. No one else could bring this to life better than them. As someone who’s never liked Slack, I’m genuinely excited about this product. The care and thought they’ve put into it is unlike anything I’ve seen before. It's truly something special.
Wishing all the best @justin_lee27 @linus_talacko1 @garrytan !
Den
@linus_talacko1 @garrytan @carlos_rodriguez38 No Carlos, we had the pleasure of working with YOU.
Thank you for converting our crazy ideas into this masterpiece.
Speedy gonzales FTW 🚄💨
Den
@justin_lee27 @garrytan @carlos_rodriguez38 thanks so much Carlos! We loved working with you to build something beautiful.
This is exactly what Slack would look like if they launched today. Amazing product @justin_lee27 @linus_talacko1 🔥
Den
@justin_lee27 @yonasbe we agree! thanks so much Yonas, we have loved having you as an early user.
Den
@linus_talacko1 @yonasbe that's literally exactly what we were going for - without being too derivative of course
Just from chatting with the team and diving into the features and content, I’m so hyped. Den isn’t just a new platform, it feels like a whole new way to work. You can feel the care that went into it, and it actually seems so fun to use. Now I just need to convince my team and uni courses lol. Game changer fr.
Den
@henrietta_vanniekerk let us know how we can help you convince them! Can't wait for you to test the new features we have dropping in a few weeks 👀
@linus_talacko1 Help me explain it to my dad/mentor who turns 50 soon? 😭
I'm sure I'll eventually figure out some way to show it though lol
Den
@henrietta_vanniekerk let me try:
Think of Den as your dad’s very own personal assistant that never clocks out—like Slack, Notion, and a team of interns all rolled into one (minus the coffee runs). He’ll wonder how he ever survived half a century without it!
Den
@henrietta_vanniekerk
> Den isn’t just a new platform, it feels like a whole new way to work.
Um, can we quote this please
@justin_lee27 Do I get to be cited lmaooo? But yeah sure if you guys wanted to idm at all
I love that you want to bring AI to as many people on earth as possible with the goal of helping them instead of replacing them.
Den
@marco_dewey thanks Marco! We think that augmenting the work that humans are doing, rather than replacing it is the best way for AI agents to collaborate with humans.
Den
@marco_dewey an ambitious but worthy goal. Thanks Marco :)
Cua
This product is great - congrats guys. once you guys add also computer-use in the mix, it will become a must-have for every company/employee!
Den
@pupposandro Could we chat about this? The final unlock for so many of the agents is computer-use, and we'd love to use Cua :)
Den
@pupposandro thanks so much Alessandro! We can't wait to incorporate some sort of computer-use into Den, and would be really keen to make Cua our default solution ;)