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179 Launches · 173 Videos Analyzed · 6 Dimensions

YC W26 Launch Video Analysis:
What Drives LinkedIn Engagement

The difference between 3,521 reactions and 53 came down to three decisions. We analyzed 173 launch videos across all 179 W26 companies to find them.

Guillermo Castro
By Guillermo Castro
Founder, Unveil
173
Videos Analyzed
111K+
Total Engagement
503
Median Engagement
3,521
#1: Pocket
Context

The Natural Experiment

All 179 launches posted from YC's own LinkedIn account
Same account. Same algorithm. Same initial push. Founder networks add a boost (r=0.31), but YC's channel does the heavy lifting. What really varies: the video itself.
Hook Analysis

We Scored Every Hook Twice

Once based on the visual opening — the first frames someone sees before the audio kicks in. Once based purely on the spoken words — what the transcript says in the first few sentences. Two independent scores. Both correlated with engagement. The findings lined up.

Visual hook rating
Manually scored 1–5 for every video: how well do the first frames stop a scroll? Covers visuals, energy, framing — everything before the audio. n=173.
1–2
326
median eng
81% flop
2.5–3.5
488
median eng
51% flop
4–4.5
658
median eng
33% flop
4.5–5
823
median eng
14% flop
r = 0.38
Spearman correlation with engagement. 2.5x median gap top vs bottom. Every tier higher = better performance.
Spoken hook (transcript only)
Independently scored the opening lines of all 166 video transcripts — words only, no visuals. Same 1–5 rubric: does the first sentence earn attention before selling? n=166.
1–2
355
median eng
67% flop
3
507
median eng
49% flop
4
543
median eng
40% flop
5
702
median eng
17% flop
r = 0.29
Spearman correlation with engagement. 2x median gap top vs bottom. Weaker than visual — but still significant (p < 0.001).
Both matter
Visual hook is the stronger signal (r=0.38 vs 0.29) — the first frame someone sees before the audio even starts matters more than the first sentence they hear. But both correlate independently. The best-performing launches get both right. The worst get both wrong.

What the Spoken Copy Actually Says

We pulled the transcript opening of all 166 videos and looked for patterns. What separates a top-scoring spoken hook from a bottom one isn't vocabulary or polish — it's structure. Two failure patterns showed up in weak hooks that almost never appeared in strong ones.

78%
"Hi, I'm [name]..." — flop rate

18 videos opened with a greeting then immediately the founder's name. 78% flopped — median 398 engagement. Shofo (1,269 eng) opened "Hey! Hey, 6-7! Against all odds..." — 8 seconds of scene before a name was ever said. Robby (841 eng) opened "Hi Jack, you're on your way to Mr. Connelly's house." — straight into a scenario. Put something worth watching before you say who you are.

260
median eng — product-description opener (vs. 503 batch)

When your first sentence IS what your product does, most flopped. "Introducing Fenrock, AI agents for back office at banks" (264 eng). "RIDAVAL helps regulatory teams submit FDA documents 12x faster" (260 eng). The one that worked: "Introducing Kofia, AI automations that write themselves" (Cofia, 1,848 eng — "Kofia" is the phonetic rendering in the transcript). The second clause was the hook — the unexpected detail. The rest answered "what does your product do?" before the viewer asked.

Side by Side: The Exact Transcripts

Here's what the top 5 and bottom 5 hooks sound like, word for word. Read them back to back — the difference is obvious.

Strong hooks (4.5–5/5)
Pocket — 3,521 eng
"This is Pocket. I never go anywhere without it."
GrazeMate — 2,464 eng
"I grew up on my family's cattle station in Australia."
Ressl AI — 1,530 eng
"We're building AI for the industries that Silicon Valley left behind."
Prana — 1,378 eng
"When you felt off after that long bike ride, when your heart skipped a beat..."
Chamber — 1,622 eng
"I need more Compute! Your teams are scrambling for GPUs like it's Black Friday."
Weak hooks (1–2/5)
Ditto Biosciences — 233 eng
"Hi, I'm Bader. I'm Dennis. And I'm Emily. And we're Ditto Bio."
Talking Computers — 101 eng
"The biggest bottleneck to AI co-workers joining the workforce is communication."
Fenrock AI — 264 eng
"Introducing Fenrock, AI agents for back office at banks."
ZeroSettle — 133 eng
"Zero-set-all is a mobile SDK that switches users from App Store billing to direct billing."
Crosslayer Labs — 53 eng
"I'm going to show cross-layer labs detecting a hijack attack on a financial services platform."
The pattern across weak hooks
Weak hooks give away the answer. Strong hooks create a reason to keep watching.

The two most common failure patterns: leading with your name (78% flop) and opening with a product description (57% flop). What the top performers share isn't a formula — it's that the first few seconds create curiosity, show a scene, or surface a problem. The viewer leans in before they know what you're selling.

Production Quality

The Quality Cliff

Editing

Excellent Editing (4.5-5)
874
median engagement
VS
Poor Editing (1-2)
283
median engagement
3.1x
Editing is the single biggest lever in the entire dataset. The gap between polished and rough is over 3x. Nothing else comes close.

Hook Strength

Strong Hook (4.5-5)
823
median engagement
VS
Weak Hook (1-2)
326
median engagement
2.5x
Your first 3 seconds make or break the video. A strong hook won't guarantee you go viral, but a weak one pretty much guarantees you won't.

Overall Quality Tiers

Excellent Overall (4.5-5)
597
median engagement
VS
Poor Overall (1-2.5)
236
median engagement
Video Length

Every Second Has to Earn Its Place

Length doesn't cause flops — filler does
The sweet spot is 45s–1:15 (626 median), but it's not a hard rule. Flop rate climbs as duration grows — 27% under 45s → 39% at 45s–1:15 → 58% at 1:15–1:45 → 68% over 1:45 — yet 39% of videos over 75 seconds still beat the batch median. GrazeMate ran 126 seconds and hit 2,464 engagement — 2nd highest in the batch. Longer videos don't fail because they're long. They fail because every second wasn't earning its place. Short videos with filler flop just as hard. Medians shown. 173 videos with duration > 0.
median engagement →
Under 45sn=15 · 27% flop
604
45s – 1:15n=64 · 39% flop
626
1:15 – 1:45n=66 · 58% flop
482
Over 1:45n=28 · 68% flop
454
Production Style

Style vs Engagement

Four production styles — each video tagged by what it actually is. Hybrid is the most common format at 68 videos and the strongest performer. Pure talking heads, with no motion graphics or b-roll, hit the highest flop rate in the dataset.

Best: Hybrid
582
median engagement
VS
Worst: Talking Head
346
median engagement
Hybrid
Talking head + motion graphics, often with screen demo — the most versatile format
582 median eng · n=68 · 41% flop
Motion Graphics
Primarily animated — kinetic type, 2D/3D animation, illustrated explainers. Often combined with b-roll.
478 median eng · n=49 · 55% flop
Screen Demo
Product walkthrough or screen recording as the primary visual — no founder on camera
392 median eng · n=36 · 67% flop
Talking Head
Founder direct-to-camera only — no motion graphics, no b-roll, no animation
346 median eng · n=37 · 76% flop
1.7x
Hybrid is the format of choice — 68 of 173 videos, the most common style and the strongest performer. The real differentiator within any style is cinematic quality: videos with high production value hit a 692 median engagement vs 485 for the rest. Pure talking heads — founder on camera with no motion graphics or b-roll — hit a 76% flop rate, the highest of any style.
The Cost of Getting It Wrong

What Bad Production Actually Costs You

We watched all 173 videos. The same mistakes kept showing up. These are the five that cost the most engagement.

The Length Tax: Going Over 2 Minutes
454Over 1:45 median
vs
62645s–1:15 median
Going long hurts. Videos over 1:45 pulled a 454 median vs 626 for videos in the 45-second to 1:15 range. But the problem isn't really length — it's filler. If every second earns its place, a 90-second video is fine. If it doesn't, people bounce.
The 3-Second Window: Weak Hooks
326Hook 1-2/5 median
vs
823Hook 4.5-5/5 median
Strong hooks hit 823 median. Weak ones hit 326 — a 2.5x gap just from the opening seconds. LinkedIn decides fast: if people scroll past the start, the algorithm stops feeding the video to more people. You don't get a second chance at that first impression.
The Editing Gap: 3.1x at Stake
283Edit 1-2/5 median
vs
874Edit 4.5-5/5 median
Editing mattered more than anything else we measured. Well-edited videos got 874 median engagement. Poorly edited ones got 283. That's not about fancy transitions or effects — it's about pacing. Cutting the slow parts. Knowing when to move on.
The Human Factor: No Faces on Screen
392Screen demo median
vs
545Other styles median
Pure screen recordings don't land. They pulled a 392 median vs 545 for everything else. But pure talking heads were even worse (346). What worked was mixing it up — some product footage, a founder on camera, a bit of motion graphics. Variety is what holds attention.
The Algorithm Blind Spot: Reactions Over Comments
17.1%
Hybrid comment rate
vs
14.3%
Motion graphics comment rate
LinkedIn cares way more about comments than reactions — roughly 5 to 10 times more. Hybrid videos pulled a 17.1% comment rate vs 14.3% for pure motion graphics. Videos that give people something to talk about get more reach than videos that just look polished.
Timing

When You Post Matters

No hour-of-day data — but day-of-week tells a clear story. Monday launches outperformed every other weekday. Wednesday was the worst. Weekend data is included below but too sparse to draw conclusions from.

median engagement →
Mondayn=27 · 41% flop
601
Tuesdayn=37 · 49% flop
521
Wednesdayn=38 · 61% flop
433
Thursdayn=36 · 50% flop
527
Fridayn=29 · 45% flop
529
Weekend — small sample, treat with caution
Saturdayn=5 · 60% flop
456
Sundayn=1 · 0% flop
897
Sunday: 1 data point only — median and flop rate are not meaningful here
Monday is the clear winner — Wednesday is the one to avoid
Monday posts hit a 601 median with the lowest flop rate of any weekday (41%). Wednesday is the outlier in the wrong direction — 61% flop rate and the lowest median at 433. Tue, Thu, and Fri cluster tightly in the 520s. Avoid Wednesday. If you can post Monday, do it.
Founder Network

Does Founder Reach Matter?

175
Companies Scraped
382
Founder Profiles
r=0.31
Spearman Correlation
A bigger following gives you a real 2.2x lift
Founders with 10K+ followers averaged 882 engagement vs 405 for those under 2K — a genuine 2.2x boost. That said, correlation is r=0.31, so followers still leave most of the variance unexplained. Video quality and hook drive the rest — and you can't buy your way past a weak video with reach alone.

Engagement by Follower Tier

< 2,000n=11
405
2,000 - 5,000n=71
509
5,000 - 10,000n=59
640
10,000+n=34
882
10K+ Followers
882
mean engagement
2.2x
<2K Followers
405
mean engagement
Takeaway
Growing your LinkedIn audience before launch day pays off — that 2.2x lift is real. But it's not a prerequisite. The Token Company had just 2,925 followers and hit 2,157 engagement with a top-tier video (4.1/5 composite) — a small account with a well-executed video can still beat the big-account average.
Team size? Doesn't matter at all (r≈ 0)
Solo founder or team of five — makes zero difference to how your launch video performs.
By Vertical

Industry Breakdown

#1
Hardware / Robotics
19companies
766median eng.
Top: Pocket, GrazeMate
#2
Climate / Energy
8companies
700median eng.
Top: DAIVIN!, Terranox AI
#3
AI/ML Infrastructure
15companies
610median eng.
Top: The Token Company, Chamber
#4
Developer Tools
38companies
526median eng.
Top: Cofia, RunAnywhere
#5
B2B SaaS
56companies
488median eng.
Top: Lance, Ressl AI
#6
Healthcare / Biotech
19companies
401median eng.
Top: Prana, Patientdesk.ai
Outliers

The 3% Exception

Low Quality, High Engagement (6 of 179 companies)

Only 3.4% of companies pulled this off. Each one had something unusual going for them — a viral product concept, perfect timing, or an existing audience. These are lottery tickets, not a repeatable strategy.

Cofia
1,848
Quality: 1/5
Chamber
1,622
Quality: 2.5/5
DAIVIN!
1,398
Quality: 1/5
Orthogonal
904
Quality: 2.5/5
Clam (formerly Baseframe)
897
Quality: 2.5/5
Agentic Fabriq
741
Quality: 2.5/5
Interactive

Every Company, Plotted

Directory

All 179 Companies

Every YC W26 launch video ranked by engagement. Includes post copy, video transcript, and frame screenshots for the top 30.

Showing 10 of 179
#1
Pocket
Cinematic 5/5 View on LinkedIn ↗
Reactions: 3,139 Comments: 382 Total: 3,521 Posted: 2026-03-03
HookPocket (YC W26) is a small device that takes notes for all your conversations and meetings.
Every important conversation happens in person — investor meetings, doctor visits, client calls, team standups. And every note-taking tool on the planet only works over Zoom.
How It WorksFor in-person conversations, the best technology available was a pen. So the team built Pocket. Three mics. One button. You press it, have your conversation, and a summary is waiting for you in the app — full transcript, action items, and to-dos, pulled out automatically. You don't type. You don't take notes. You just talk.
SolutionPocket also does something no app can: snap it to the back of your phone and its contact mic captures both sides of a phone call. No speakerphone required.
TractionIn the last 5 months, the team has delivered over 30,000 units with a $27M annualized run rate, growing 50% month over month.
Congrats on the launch, Akshay Narisetti and Gabriel Dymowski!
🚀 heypocket.com/now
HookThis is Pocket. I never go anywhere without it. At the tap of a button, it records and creates organized notes based on your conversations.
ProblemI use it at work, at the doctor's, and when I'm out and about. I could use an app, but this, it's effortless. I snap it to the back of my phone and take it with me everywhere I go.
How It WorksI open the app and Pocket gives me full notes for everything I record. It knows who said what and action items are pulled out automatically. It even has a mind map of all my to-dos from every meeting in one place.
TractionIt also works offline, like fully offline. Record anywhere you want and it'll sync when you get back online. Thousands of people use Pocket.
CloseDoctors, lawyers, students, founders, basically anyone managing a packed schedule. This is Pocket.
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#2
GrazeMate
Cinematic 5/5 View on LinkedIn ↗
Reactions: 2,326 Comments: 138 Total: 2,464 Posted: 2026-02-02
HookGrazeMate (YC W26) builds autonomous drones that herd cattle.
ProblemLarge ranches can spend hundreds of thousands each year moving cattle between pastures using motorbikes, helicopters, and horses. It's expensive, time-consuming, and increasingly hard to staff.
How It WorksGrazeMate's drones herd cattle automatically. They find your herd, guide them calmly using AI that understands animal behavior, and provide real-time animal and pasture data. GrazeMate lets ranchers manage their operations on their terms - moving and monitoring cattle more often, with real-time insights to support each decision.
TeamSam Rogers grew up on a cattle station in Australia and dropped out of robotics to build robot cowboys. The GrazeMate team combines PhDs and backgrounds in agriculture.
CTAIf you're a rancher looking to save time and do more with less, schedule a demo at grazemate.com or send a message to sam@grazemate.com.
Congrats on the launch Sam Rogers!
HookI grew up on my family's cattle station in Australia. Most days we'd spend hours moving cattle between pastures so they have fresh grass to graze. This can be done on horseback, on motorbike and often by helicopters.
ProblemBut the reality is, it takes massive amounts of time. Ranchers can spend up to 5 hours every day moving cattle. It's expensive.
Operations can spend anywhere from tens of thousands to over a million dollars a year on mustering alone. And finally, it's dangerous. I've seen first hand how this can go seriously wrong.
SolutionThat is why we built Grazemate. Grazemate is an autonomous drone system that musters cattle for you. It learns from your herd and gives ranchers back their time.
Here's how simple it can be. Via your phone, you open the app, select where your cattle are and pick where they need to go. Then, you press start.
The drone takes off, it finds your cattle and helps move them to the new pasture. It reads animal body language in real time and adjusts its position to keep them moving calmly. Grazemate's AI learns how your specific herd responds and gets better with every muster.
Once it's done, you get a notification. There's no manual piloting and it's completely autonomous. Beyond mustering, Grazemate gives you complete visibility over your operation.
How It WorksThe same drone can monitor cattle health, estimate weight and check pasture quality along with inspecting water troughs. I've watched my dad spend hours every day moving cattle. Soon he'll do it with a few clicks over his morning coffee.
TractionAnd he's not alone. We're already working with ranchers managing over half a million cattle. And now we're bringing this across the world.
SolutionGrazemate is the new way to help ranchers manage cattle.
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#3
The Token Company
Motion Graphics 4/5 View on LinkedIn ↗
Reactions: 1,921 Comments: 236 Total: 2,157 Posted: 2026-03-03
HookYou're wasting half of your context window.
Excited to finally announce that The Token Company (YC W26) is a part of Y Combinator working on ML models to pre-process LLM inputs.
SolutionOur goal was to fix context bloat by compressing LLM prompts to make them shorter, denser, and cheaper to run.
We then realized the compressed inputs actually made the LLMs perform better.
TractionWorking with Pax Historia (60k DAU, 15th largest token consumer on OpenRouter, 193B tokens/month), we saw users prefer outputs generated from compressed inputs.
Pax Historia also saw a lift of +5% in user purchases after compression. They not only saved money but also increased user purchases by compressing inputs before sending them to the LLM.
We are seeing this effect now with several of our customers handling large natural language inputs
["Dance of the Sugar Plum Fairy"] ["Dance of the Sugar Plum Fairy"]
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#4
Lance
Hybrid 4.5/5 View on LinkedIn ↗
Reactions: 1,262 Comments: 623 Total: 1,885 Posted: 2026-02-09
HookLance (YC W26) builds AI agents for hotel operations that manage guest communication, sales workflows, and on-property execution end-to-end. They're already working with leading hotel groups in the US operating 50+ hotels across major brands.
How It WorksHotels still run on phone calls for everything: towels, late checkout, maintenance, parking, and directions. Every request triggers a manual workflow, someone responds, gathers details, routes the task, tracks it down, and follows up. That model breaks when teams run lean. With 65% of hotels reporting staffing shortages, the front desk becomes the bottleneck. During peak periods or after hours, hotels miss up to 40% of inbound requests because the operation does not scale.
Lance fixes this by handling guest communication 24/7, qualifying and responding to sales and booking inquiries, and coordinating real on-property execution. The system collects the right details, routes work automatically, escalates when needed, and supports
HookY Combinator just backed us to solve an industry problem that has been untouched in the past 35 years. Some of the biggest hotel brands in the world are currently using REI Agent to run guest operations.
SolutionWatch how Lance takes a guest request from end to end, start to finish. Lance meets you where you are. It connects to your existing and legacy systems, platforms, and workflows.
In minutes, Lance is ready to answer a guest request and take actions on their behalf. Hey Lance, you live? Hey, what can I help you with today?
ProblemI'm thinking of hosting a pool party after demo day. Can I extend my stay a couple more days? That shouldn't be a problem.
DemoLet me check availability and extend your stay. Since it's after demo day, want me to reserve a restaurant near the pool and make sure extra towels are ready? Yeah, that's great.
Can we do a reservation for 8? Absolutely. I'm seeing availability at 8.
TractionI'll book that and arrange extra pool towels as well. Does that work? Perfect.
Thanks. All set. I'll text you the confirmations.
SolutionHave fun at the pool and good luck at demo day. Whether guests call or text, Lance handles both at the same time. It speaks their language in English, Espanol, Jongwen, Hindi, Francais.
ProblemAnd it follows your brand and your policies exactly. Every request is tracked from start to finish. Nothing gets lost and teams finally see what's slowing them down.
How It WorksHotel technology isn't moving forward, but Lance connects hospitality's outdated systems to give guests an experience that's truly seamless. Go to Lance.live because guests have places to be.
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#5
Cofia
Screen Demo 1/5 View on LinkedIn ↗
Reactions: 1,610 Comments: 238 Total: 1,848 Posted: 2026-03-05
HookCofia (YC W26) creates AI automations that write themselves.
How It WorksCofia learns how you work and builds tailor-made automations you can deploy without prompts, code, or workflow builders.
Everyone talks about AI saving time, but the reality? Most AI tools require you to: recognize the opportunities for automation, describe your exact workflow in a prompt, and learn new interfaces and configure new tools. So repetitive work stays manual, even when AI could handle it.
Traditional AI waits for you to describe what you need. Cofia proactively builds personalized automations, trained on your exact workflows, by securely processing the work you actually do.
No prompts. No remembering to turn it on. No describing what you do.
How it works:
Solution- Cofia learns about the specific repetitive tasks you do
- When it recognizes a pattern, it builds a custom agent and then offers it to you
Problem- You review, launch it, and never do that task manually again
Sample tasks it'll detec
HookIntroducing Kofia, AI automations that write themselves. It securely learns how you work and proactively builds personalized automations that take work off your plate and do tasks just like you would. Take a sales rep, building prospecting lists, copying from the internet, pasting into a spreadsheet, enriching with search and Salesforce data.
ProblemAgain and again. Kofia comes to the rescue when you're doing it manually. It knows how you've done this in the past and is now offering you a custom-built automation for this use case.
SolutionReview it, launch it. Your automation now handles it all. 400 leads found with the exact process you usually follow.
Now take a recruiter, posting the same job to five boards. Copy, paste, format, repeat. Kofia says, hey, I know you want to post this in all boards.
How It WorksI can take over. All you need is one click. Review, launch.
Traction30 minutes saved per posting. Or a marketer, stitching together Monday morning reports from Google Ads, Facebook, HubSpot. Kofia knows you do this every morning and offers to help.
Now you can enjoy your coffee instead. The magic? You never wrote a prompt.
How It WorksYou never described your workflow. Kofia never asked. It learned and built agents tailored to your work.
CloseReady to see what it can take off your plate? Download Kofia today.
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#6
RunAnywhere
Motion Graphics 3/5 View on LinkedIn ↗
Reactions: 1,473 Comments: 201 Total: 1,674 Posted: 2026-01-22
HookRunAnywhere (YC W26) helps apps run AI directly on phones and other edge devices. You add our SDK in a few lines, run things like chat and voice on-device, and fall back to the cloud only when you need to—so it stays fast, works with bad internet, and keeps sensitive data local.
ProblemThe problem today is that "on-device AI" is still a pile of sharp edges: every platform is different, models are hard to ship and update safely, and teams end up stitching together downloads, memory management, and multiple runtimes themselves.
How It WorksRunAnywhere is designed to take that burden off the app team: it handles model delivery and updates, keeps the app stable while models load/run, and gives you a dashboard to roll out changes and see what's happening in production.
TractionTheir team has already done this at scale—Sanchit has shipped mobile SDKs and apps used by millions, and Shubham has built large-scale infrastructure and reliability systems for massive fleets.
Congrats on the launch Sa
HookThe biggest threat to a data center is if the intelligence can be packed locally on a chip that's running on the device. If I can only run it on the mainframe, arguably the application is not that good.
ContextRunning on-device AI models faster than ever. The phone will really be an edge node for AI inference. My car lights are on, what should I do?
SolutionIf I can design it such that when the device becomes powerful, I don't have to redesign my application. Then I have built an application that is durable to the innovation that is undoubtedly going to happen.
You'll get everything through AI. Whatever you can think of, or really whatever the AI can anticipate you might want, it'll show you. How well can you actually run it?
CloseAlmost anywhere. And anywhere is the key word over there.
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#7
Chamber
Hybrid 2.5/5 View on LinkedIn ↗
Reactions: 1,261 Comments: 361 Total: 1,622 Posted: 2026-01-13
HookChamber puts your AI infrastructure orchestration, governance, and resource optimization on autopilot so that you can run on average 50% more workloads using your existing AI infrastructure.
ProblemThe platform acts like an autonomous infrastructure team, monitoring GPU clusters, predicting resource needs, detecting bad nodes, and reallocating GPUs in real time so AI teams can move faster without manual work.
Today, 30–60% of enterprise GPU capacity sits idle due to siloed allocations, driving up costs and slowing teams, adding up to more than $240B in waste each year.
TractionChamber is a team of former Amazonians that helped build and scale large-scale infrastructure optimization, delivering hundreds of millions in cost savings. Now they're bringing those learnings to help other enterprises.
Congrats on the launch Charles Ding, Andreas Bloomquist, Shaocheng Wang, and Jason Ong!
https://www.usechamber.io/
HookI need more Compute! Your teams are scrambling for GPUs like it's Black Friday. They wait months for a training slot and don't make progress on their models.
ContextEvery day, an Excel spreadsheet decides who gets to train. For you, Compute has turned into a back-alley economy. Looking for GPUs?
ProblemAnd you'd do anything to get your jobs running. But here's the twist. You probably have enough GPUs.
TractionIntroducing Chamber. Run up to 50% more jobs on GPUs you already have. Chamber puts your AI infrastructure governance and GPU optimization on autopilot.
We detect idle capacity in real time and shift it to the jobs that matter most. Bad nodes are handled autonomously. Jobs run uninterrupted.
ProblemMy model is finally training! No manual intervention. No more spreadsheet micromanagement.
CTANo GPU politics. Get started at usechamber.io
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#8
Crow
Screen Demo 3/5 View on LinkedIn ↗
Reactions: 1,209 Comments: 377 Total: 1,586 Posted: 2026-01-20
HookCrow (YC W26) lets users control your app through chat. Connect Crow's AI agent to your product, and users can type what they want instead of clicking through menus.
ProblemSoftware UIs are stuck in the past. Users expect to chat with products like they do with ChatGPT, but building an AI assistant that actually works takes 6+ months. Meanwhile, support tickets pile up and users churn to new 'AI-first' alternatives.
TractionThat's where Crow comes in. Connect it to your product's features and data, and it executes real actions based on what users ask for. It navigates your UI, calls your endpoints, and handles complex workflows. You set the guardrails, track every interaction, and deploy in under a week.
Crow's customers go live in under a week - getting an AI Assistant on their app that is faster and more reliable than what they tried building in-house.
How It WorksAryan and Jai built Crow after transforming workflow-heavy products into chat-first experiences at top AI startups—they kno
លោលាបនិតិស្តីរិ៌ិនចឥ្ពចមិប្មួចាត៊ឺមំ។ ត្តិតិស្រួអាំត្ថែូងភែុឆីងទិត្តុស៊ ឡ។
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#9
Ressl AI
Talking Head 4/5 View on LinkedIn ↗
Reactions: 1,331 Comments: 199 Total: 1,530 Posted: 2026-02-26
HookRessl AI (YC W26) deploys AI Employees at Field Operations businesses to automate their office.
How It WorksEvery home services business runs on "glue" employees - people who spend their days copy-pasting between software, generating estimates, chasing parts vendors, answering calls, and manually reconciling invoices in QuickBooks. They're doing work on top of software that should be doing it automatically. The result: bloated offices, slow response times, and leads falling through the cracks - all eating into margins that were already thin.
TractionRessl is replacing that manual, grunt work with OpenClaw-style proactive AI agents that live inside the tools these businesses already use. Their agents handle estimating, procurement coordination, multi-channel lead response, insurance communications, and invoicing - autonomously, in the background, without anyone clicking through a janky UI.
Leaner office means higher margins. Every lead answered instantly means more jobs booked. Tha
HookWe're building AI for the industries that Silicon Valley left behind. The trades industry. While every other industry got an AI revolution.
ProblemAnd home services got service data and a player. SMA businesses are facing decade-old problems. Overwhelmed by notifications from all directions.
Estimates taking days. How far is this job? Is that part still in stock?
And the margin pressure? Don't even get me started. That's where we come in.
Meet Rassel, an AI employee that runs your front office for you. Rassel instantly gives estimates using passcodes. Books jobs and answers queries across any channel.
Dispatches the right technicians for the job. Follows up with your leads. Picks up calls 24x7 and gives you a full view of your business in one place.
How does it work? Rassel has access to past data from your software and all your messaging platforms. Which means it knows your business like you do.
All you have to do is shoot a text to Rassel like you would to your employees. And Rassel would act immediately. Rassel, what did you do last night?
CTAI got us 21 jobs. 3 on Yelp, 6 on email, 12 on SMS, and I sent estimates to all of them. If you're a services company looking to increase your operating margins.
Or a PE firm looking to transform your portfolios. Let's talk.
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DAIVIN!
Cinematic 1/5 View on LinkedIn ↗
Reactions: 1,198 Comments: 200 Total: 1,398 Posted: 2026-01-23
HookDAIVIN! (YC W26) enables humans to breathe underwater without oxygen tanks.
Did you know a single bottle of water contains enough oxygen to sustain a human for a day?
DAIVIN uses electrolysis to extract the oxygen from water and convert it into breathable gas for divers, enabling tankless underwater breathing limited only by battery duration.
Leo Kankkunen is an electrical engineer with seven years of experience in the electrical industry and the youngest person in Finland to achieve the highest national electrical certification. He's also a certified diver and previously served in the military.
ProblemUnderwater diving technology hasn't changed in almost 100 years, and is rife with problems.
SolutionSo DAIVIN! removes tanks entirely, enabling missions to start anywhere with a shoebox-sized system.
Congrats Leo Kankkunen on the launch!
www.daivin.tech
I don't know if you are the guy that took this video from the water, but let's try it. Here you can see the device. Let's do it. Here you can see the device. Let's do it. Let's do it again.
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The Winning Formula
Free · The Launch Video Playbook

What to say. What to show. What to cut.

You've got the data. Now get the playbook — the opening lines the top 11 used word-for-word, the phrases that killed engagement, the shot order that held attention, and the pacing behind 1,378 median reactions. Everything the report didn't have room to show.

Get the Playbook → PDF · Free · No signup required
Guillermo Castro
Applying this to your launch

I help Y Combinator startups turn this data into a launch video that actually performs.

If you're launching soon and want a video built on what the data above says works — strong visual hook, tight editing, hybrid format, every second earning its place — let's talk.

Work with me →
Methodology

How We Did This

Dataset: All 179 YC W26 launches posted to YC's LinkedIn account (Jan–Mar 2026). Of those, 173 had an analyzable video — 5 were image/text posts with no video and 1 had a malformed clip. All tier-level analysis (hook, editing, duration, style, etc.) is on the 173-video set; batch-wide totals in the hero (111K+ engagement, 503 median) are on the full 179. Engagement medians used where noted.

Engagement: Reactions + comments + reposts as of mid-April 2026.

Scoring: Every video was scored 1–5 on 6 dimensions: opening hook (first 3 seconds), camera/visual quality, editing & pacing, motion graphics/VFX, overall quality, and AI perception (how AI-generated the video looks). Initial scores were drafted by a multi-modal LLM pass and then manually reviewed frame-by-frame by the author — 98.9% of the ~960 dimension-level scores were overridden during human review, so what's reported is effectively a hand-scored dataset. Rubrics: hook = "does this earn the next 3 seconds of attention?"; editing = pacing and cut discipline, not polish; overall = the viewer's end-to-end impression.

Founder data: 382 individual LinkedIn profiles scraped via API across the full 200-company W26 batch; 175 of those companies also had a launch video in this analysis.

Styles: Cinematic, Talking Head, Hybrid, Motion Graphics, Screen Demo.

Limitations: Correlation, not causation. We can't isolate production quality from founder network, product novelty, or market timing. But the natural experiment (same YC account) controls for the biggest confounder: distribution advantage.