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Lucas Rantzau Profile
Lucas Rantzau

@lucasrantzau

1,431
Followers
412
Following
180
Media
2,853
Statuses

Building cool sh*t on the internet. Link in bio for founders → . AI captions → . Sold a company that got funded on Shark Tank.

Joined June 2017
Don't wanna be here? Send us removal request.
Pinned Tweet
@lucasrantzau
Lucas Rantzau
9 months
It’s finally here! 🤯 The Linktree for founders is launching right now. It’s called Founder Site and allows you to: → Display your history of startups & ventures → Share all your important links → Build an audience by collecting emails → The ultimate link in bio for
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@lucasrantzau
Lucas Rantzau
1 year
I did it! 🤯 Within 24 hours of @OpenAI releasing the API, I launched a full-stack AI application using the new tech. Social Caption allows you to effortlessly generate creative image captions for social media in seconds with GPT-4 Vision. Please let me know what you think!
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@lucasrantzau
Lucas Rantzau
1 year
@WebDesignMuseum Not gonna lie, 2005 was pretty clean
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@lucasrantzau
Lucas Rantzau
11 months
Clean and minimal sign in page. Finished designing and coding it today. What do you think?
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@lucasrantzau
Lucas Rantzau
11 months
Crazy X growth hack idea: Livestream building a SaaS app in 24 hours. Give it away to a viewer afterward. Like @MrBeast but with a developer/business focus. I might have to try this. What do you think about the idea? #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
11 months
How I went viral launching an AI app in 24 hours 📈 100% transparent with traffic, users, and sales. Sharing how I did everything and how you can replicate it and do it yourself. Let me know in the comments if you like this kind of content.
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@lucasrantzau
Lucas Rantzau
11 months
Couple legends followed me today. Made my day @levelsio and @arvidkahl . #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
10 months
Pricing section for my upcoming SaaS. Finished designing and coding it today. What do you think?
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@lucasrantzau
Lucas Rantzau
1 year
@WebDesignMuseum Nothing beats good old BackRub
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@lucasrantzau
Lucas Rantzau
1 year
Building a SaaS in public #7 : ✓ Designed the landing page in Figma ✓ Initial thoughts on how to monetize What do you think about how I'm planning to monetize? #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
1 year
Building a SaaS in public #5 : ✓ Added tabs to toggle between "Projects" and "Links" ✓ Added ability for founders to add links and for visitors to see and click them ✓ In the dashboard, founders can add, edit, or delete links What do you think? #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
1 year
@shl I have met extraordinary people with terrible parents. When I look at my siblings and myself, we are all very different, even in political views, despite growing up in the same home.
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@lucasrantzau
Lucas Rantzau
9 months
100 users in 12 hours 😱 'The Linktree for founders' is taking off much faster than I expected. Display your startups/ventures, share links, and build an audience with the ultimate link in bio for founders. Reserve your URL and create your Founder Site now 👇🏽
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@lucasrantzau
Lucas Rantzau
11 months
The best way to showcase your founder journey. That's what I'm building with Founder Site. What do you think of the startup card design? #buildinpublic #indiehackers #webdesign
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@lucasrantzau
Lucas Rantzau
8 months
Almost 500 users in the first month 🚀 Founder Site is growing much faster than anticipated. I have so much cool sh*t planned for it. If you haven't already joined 'The Linktree for founders', go do so. First founders to sign up get free exposure and traffic to their
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@lucasrantzau
Lucas Rantzau
11 months
Once you understand this, everything changes: You overestimate what you can achieve in one year. You underestimate what you can achieve in three.
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@lucasrantzau
Lucas Rantzau
11 months
Anyone grinding this weekend? What are you building? #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
10 months
@utsavpm - Add a moving border gradient animation to your buttons. (Increases MRR by roughly 100%)
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@lucasrantzau
Lucas Rantzau
10 months
How long is your Product Hunt streak? Checking @ProductHunt every day inspires me and lets me know what kinds of products are trending. Getting ready for my own next launch 👀 #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
8 months
Building weekend 🏗️ Who else is grinding this weekend? Share what you're working on below 👇🏽
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@lucasrantzau
Lucas Rantzau
8 months
First paying user 🤑 Founder Site now has a user on a $64 yearly plan. Here's why this is the best deal ever: → Startups get featured at the very top of Explore (worth it for this traffic alone) → Dofollow links to startups for SEO → Collect unlimited email subscribers →
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@lucasrantzau
Lucas Rantzau
1 year
Building a SaaS in public #6 : ✓ Built functionality to handle email subscriptions ✓ Added "Subscribers" tab to dashboard with list of subscribers ✓ Added ability for founders to download their subscribers list as a CSV file What do you think? #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
1 year
Building an AI app in less than 24 hours - update #4 : ✓ Demo is working ✓ Upload image ✓ Select preferences ✓ Get image captions with GPT-4 Vision What do you think? #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
8 months
“Show me a picture of The White House” Google Gemini:
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@lucasrantzau
Lucas Rantzau
11 months
Pretty sick if you ask me. I appreciate the f*ck out of you guys. More cool stuff to come. #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
11 months
My first ever Indie Hackers post! 🎉 Tons of value in it. Link is in the first comment. Please consider upvoting if you enjoy it. #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
9 months
248 founders and counting 👀 Added social proof to the landing page. Tons of cool features coming. Right now it's 100% free, and first founders to sign up will get free exposure. Still cool URLs left. Go create your Founder Site 👇🏽
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@lucasrantzau
Lucas Rantzau
1 year
Last 48 hours have been crazy: ✓ Launched an AI app in 24 hours ✓ Probably the world's first app release using GPT-4 Vision ✓ App announcement post went viral ✓ Doubled my followers Should I make a video explaining how I did it? As well as share numbers, sales, and such?
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@lucasrantzau
Lucas Rantzau
8 months
Analytics for Founder Site is almost done 📈 You will be able to see the traffic coming to your Founder Site and how many clicks your startups are getting. What do you think about the look and feel? #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
1 year
I dedicated 5 years of my life to my last company. I regret not building it more publicly. Going forward I will document my projects and try to add value to the community. #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
8 months
Why do programmers struggle with marketing? Programming gives an instant output based on input. That’s not how marketing works. You will have to wait for the output. Want to succeed with marketing as a programmer? You will have to break the immediate feedback loop that you
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@lucasrantzau
Lucas Rantzau
7 months
Is blur enough restriction? 👁️ Just about to release analytics as the first major Pro feature. I added a simple CSS blur to restrict the content for free users. Is this enough, or is another approach needed for people inspecting and messing with the CSS? 😅 #buildinpublic
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@lucasrantzau
Lucas Rantzau
11 months
What is your opinion on working on weekends? Are they sacred for recharging your batteries? Are they an opportunity to grind and leave the competition behind? #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
9 months
300+ users in 5 days 🤯 Never expected Founder Site to take off this fast. So awesome to see all the founders and their startups on 'The Linktree for founders'. Explore tab coming soon. First founders to sign up will get a ton of free exposure. Still cool URLs left. Sign up
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@lucasrantzau
Lucas Rantzau
10 months
Question for SaaS users: Are you willing to pay to remove SaaS branding, or don't you care? #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
1 year
Build in public on TikTok? Short, to-the-point updates daily that engage viewers and get them invested in the journey. Seems like an interesting medium. #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
9 months
Have you ever launched on Product Hunt? What is your #1 piece of advice? I'm launching Founder Site soon and would love to be well-prepared. #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
9 months
Adding a startup takes 30 seconds 🤯 Have you joined 'The Linktree for founders' yet? Still cool URLs left. Go create your Founder Site now 👇🏽
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@lucasrantzau
Lucas Rantzau
8 months
On top of @IndieHackers 🚀 Tons of value in this post on how to have a viral launch with no followers. Link in first comment 👇🏼
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@lucasrantzau
Lucas Rantzau
11 months
Not satisfied with my progress today. Just one of those low-energy days. Hopefully I'll be back on the grind tomorrow. #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
1 year
Yo boys. What are we doing this weekend. Building or drinking beer? #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
1 year
Not that anyone asked, but I’m building Founder Site with the following tech stack: - Next.js - Tailwind CSS - MongoDB - NextAuth - Bytescale - Vercel What’s your favorite stack? #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
1 year
Unpopular opinion: LinkedIn is the cringiest social media ever.
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@lucasrantzau
Lucas Rantzau
10 months
Just bought a one-way ticket to Phuket, Thailand. My last startup didn't allow me to travel much because of employees, meetings, warehousing, and such. I feel like I haven't explored much of this beautiful floating rock in space that we live on. No more dark rainy days here in
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@lucasrantzau
Lucas Rantzau
8 months
Remember Limewire? Yeah, so they're an AI image generation tool now. No pivot is too great.
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@lucasrantzau
Lucas Rantzau
8 months
Reach on X vs LinkedIn (not expected) 🤯 I posted the exact same piece of content on LinkedIn and X. The post was me launching my new SaaS product (A link in bio for founders). I have more followers on LinkedIn than on X: → 1860 followers on LinkedIn → 1260 followers on X
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@lucasrantzau
Lucas Rantzau
1 year
If you have written code, you've launched too late #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
11 months
Do you want to grow on X? And have quality followers that are not NPCs? Then do NOT do this: "Almost at [amount] followers, let's connect!" Just share some cool sh*t and provide some value, goddamn.
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@lucasrantzau
Lucas Rantzau
9 months
Do you want to learn to code and build SaaS FAST? This is the tech stack I recommend for building cool sh*t quickly: Framework → Next.js ( @nextjs ) Code editor: → Cursor AI Editor ( @cursor_ai ) Database: → MongoDB ( @MongoDB ) Payments: → Stripe ( @stripe ) Authentication: →
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@lucasrantzau
Lucas Rantzau
1 year
Am I the only one who codes every day but forgets to commit daily? I should start remembering to do so, so I can flex that beautiful green GitHub chart for clout. #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
10 months
Is it even an indie SaaS without a cute footer? Do you plug yourself in your indie products? #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
9 months
I spent 5+ years building my last startup ⏳ I only have one regret: Not building it more publicly. The value and feedback from building in public are crazy powerful. I spent 4 months building my current SaaS. It's not even launched yet, but the whole product is built and
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@lucasrantzau
Lucas Rantzau
11 months
I'm designing labels for Founder Site. What are you working on? #buildinpublic #indiehackers #webdesign
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@lucasrantzau
Lucas Rantzau
1 year
Building an AI app in less than 24 hours - update #3 : Using this tech stack: - Next.js - MongoDB - OpenAI - NextAuth - Bytescale - Stripe What's your favorite stack? #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
8 months
My very first Reddit post is going viral 🚀 Resulting in: → 1000 unique visitors → 100 new users for Founder Site How? I tried to provide as much value as possible. By the way, the latest founders and startups get featured at the very top. Sign up to Founder Site and get
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@lucasrantzau
Lucas Rantzau
8 months
5000+ visitors in the first month 🤯 All 100% free organic traffic for my latest startup, Founder Site (a link in bio for founders). I did this with almost no followers. How? Simply posting content to these channels: → X/Twitter (daily) → Indie Hackers (weekly) → Reddit
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@lucasrantzau
Lucas Rantzau
11 months
What can you expect from a successful Indie Hackers post? My first post was on top of the homepage for a few days. That resulted in: → 29 likes → 5 bookmarks → 24 comments → 1,252 views And most importantly, 176 visitors to my website. Should I write a long-form post
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@lucasrantzau
Lucas Rantzau
1 year
Finishing up the design for the startup cards on Founder Site. There will be no prettier way to display your journey as a founder. This version is for dark mode. What do you think? #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
9 months
I got this crazy organic traffic with no followers 📈 → 4,399 page views → 1,522 unique visitors → 306 users All in 6 days since the launch of my SaaS, Founder Site. How? Very simple. I built a cool-ass product and posted about it on X with: → Videos showcasing the
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@lucasrantzau
Lucas Rantzau
10 months
Get on my toggle switch button level! Settings page taking shape for my upcoming SaaS, Founder Site. What do you think? #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
9 months
Social links on Founder Site 🔗 What do you think of the style and placement? Founder Site will be the ultimate link-in-bio for founders. Display startups, share links, and build an audience. #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
11 months
The people have spoken. I'm back to building Founder Site. Loving the way this project is turning out. Currently working on the landing page. What do you think? #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
11 months
I created the world's first GPT-4 Vision app. It lets users upload images, select preferences, and generate creative captions for social media. Should I keep working on it or move on to other projects? #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
9 months
Working on billing today 💰 Question: How much should a user save in % on yearly billing compared to monthly? #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
8 months
After almost two months of nomading in Thailand and Bali, I'm heading back to cold Copenhagen ❄️ I can't recommend enough going if you have the freedom to do so. I will be back for sure.
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@lucasrantzau
Lucas Rantzau
1 year
Super nonproductive weekend on my end. Anyone get shit done? #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
1 year
Clean and minimal link design. It's for the SaaS I'm building in public called Founder Site. A link-in-bio-tool/personal website for founders. What do you think? #webdesign #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
11 months
The traffic a viral X post will give you. All this from a 174k view post. Keep building cool sh*t in public! #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
8 months
Who else is building this weekend? 🏗️ I’m going to be working on my latest startup, a link in bio tool for founders called Founder Site. Share what you are working on below 👇🏼
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@lucasrantzau
Lucas Rantzau
6 months
Early UI design work on startup cards 🎨 Founder Site 2.0 is coming. Strongly considering switching to a widget grid layout system. This will allow much more customizability and creativity on founder profiles. What do you think? #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
11 months
Signup flow design for my SaaS. Can't wait to launch Founder Site. It will be the simplest and greatest way for founders to showcase their startups and build an audience. What do you think?
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@lucasrantzau
Lucas Rantzau
7 months
Explain your startup in one sentence 👇🏽 #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
1 year
Anybody had a productive weekend? What did you work on? #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
8 months
Is your graph looking green and healthy? 🥦 Consistency is the keyword for me in 2024. Two things I do religiously every day: → Post on X/Twitter → Commit code This ensures I progress just a little every day. #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
1 year
@OpenAI Try Social Caption for free here:
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@lucasrantzau
Lucas Rantzau
10 months
My actionable goals for 2024 that you can do too: → Post and comment at least once a day on X → At least one Git commit a day → Check out new products on Product Hunt every day These few simple things will result in: → Building an audience → Shipping product features fast
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@lucasrantzau
Lucas Rantzau
8 months
First two weeks of traffic 🤯 All organic and with almost no followers. These were the traffic channels: → X/Twitter → Indie Hackers → Reddit Building in public is crazy powerful. Founder Site now has 431 users. All from free and organic traffic. Go sign up to the link
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@lucasrantzau
Lucas Rantzau
1 year
Yo React and Next.js devs. How do you handle file upload and storage? Been looking at Bytescale but still unsure. #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
8 months
I got post of the month on Indie Hackers 🤯 With almost double the amount of engagement compared to the second place. Curious about the numbers? Here they are: → 50 likes → 28 bookmarks → 61 comments → 2,515 views So far this has resulted in: → 415 unique visitors →
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@lucasrantzau
Lucas Rantzau
11 months
I created the world's first GPT-4 Vision app. It lets users upload images, select preferences, and generate creative captions for social media. Should I keep working on it or move on to other projects? #buildinpublic #indiehackers
No moat, move on
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Yes, keep working on it
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@lucasrantzau
Lucas Rantzau
7 months
Finally back to building 🏗️ After a couple of intense weeks of moving apartments, lots of consultancy work, and other matters, I'm back to shipping. What have I missed?
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@lucasrantzau
Lucas Rantzau
8 months
Venture images are now square 🟩 Small detail change but makes more sense for startup logos. Default image is fetched from favicon so fits better for this reason also. What do you think? #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
10 months
Navigation + hero section designed and coded. Going for a clean and minimal vibe. What do you think? #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
1 year
Created the dashboard for Founder Site: ✓ Styled like the Figma design ✓ Responsive on mobile ✓ "Profile" tab working with updates saving to the database What do you think? #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
9 months
Finished pricing section 🤑 For my latest SaaS/startup. A link in bio for founders. What do you think? #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
1 year
Somehow blew way past 200 followers with my last post. I appreciate the f*ck out of you guys. Never been more excited to build cool projects in public. #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
1 year
My posts hit quadruple digits today. I have been active on X for about 1.5 months now. I'm a lurker no more, boys. #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
8 months
Startup image automatically fetches from favicon 🌐 Just type in the URL when adding new ventures or links, and the image will populate from the favicon. You can still override it by uploading a better/higher quality image. What do you think? #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
1 year
Finished coding the 'complete signup flow' for Founder Site. Added animation to make it feel more alive. A lot of attention to detail in design and development on this page. What do you think? #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
7 months
Founder Site milestones: 10 founders ✅ 100 founders ✅ 250 founders ✅ 500 founders ✅ 1.000 founders 2.500 founders 5.000 founders 10.000 founders 100.000 founders Be among the first and get some free exposure and traffic for your startups. #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
9 months
Legend @imgyf has joined Founder Site 🔗 His startup, OurBabyAI, makes $1,200 per month. It allows you to predict what your future baby will look like with AI-generated photos. Check out his Founder Site 👇🏽
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@lucasrantzau
Lucas Rantzau
8 months
Writing a in-depth banger piece of content for @IndieHackers 🚀 “How I got 200+ users in the first 24 hours” Posting it later today. #buildinpubic #indiehackers
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@lucasrantzau
Lucas Rantzau
9 months
Day 1 of being a nomad in Thailand: Productivity: 0/10 (didn’t do sh*t). Experiences: 8/10. Cheap, tasty foods, amazing views, and sunny weather. I can't complain.
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@lucasrantzau
Lucas Rantzau
10 months
@levelsio Can recommend @cursor_ai too. It’s an AI-first code editor. Switched to it from VS Code a couple months back. Copies over all your settings and plugins so you are up and running instantly
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@lucasrantzau
Lucas Rantzau
1 year
@WebDesignMuseum Fun fact: Antonio Banderas invented dark mode in web design
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@lucasrantzau
Lucas Rantzau
9 months
FREE exposure for founders and their startups 😱 The 'Explore' tab is now live on Founder Site. Only founders with at least 1 venture will be shown. Huge upside for early adopters. Not only is the link in bio for founders 100% free at the moment, but now you also get free
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@lucasrantzau
Lucas Rantzau
9 months
I'm dumbfounded by these types of comments. Comparing the MVP of a solo builder with a VC-backed startup going at it since 2021 🤯 Concrete and constructive feedback I receive with gratitude.
@maxslch
Maksim
9 months
@lucasrantzau joined founder site recently found UX to be behind alternative services, even like peerlist as an example
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@lucasrantzau
Lucas Rantzau
1 year
Building an AI app in less than 24 hours - update #2 : ✓ Domain: ✓ Landing page is now live Social Caption uses the brand new GPT-4 Vision API. Upload images and generate captivating captions for social media in seconds. #buildinpublic #indiehackers
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@lucasrantzau
Lucas Rantzau
8 months
Added live traffic numbers to the 'Explore' tab 🚦 Should I also add total startup link clicks? Filtering/sorting is coming to Explore soon too. Join Founder Site and give your startups some free exposure and traffic 👇🏽
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@lucasrantzau
Lucas Rantzau
1 year
Founder Site is taking shape: ✓ Styled project cards ✓ Made founder sites responsive ✓ Added frontend validation to fields Let me know what you think. #buildinpublic #indiehackers
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