15 YC Founders to Follow on X in 2026
Paul Xue ·
The short answer
Shiv Kampani, Narayana Aaditya Ganeshkumar and Javed Qadruddin led our 60-founder shortlist by observed original X posts from October 1 to October 30, 2026, with 52, 50 and 43 posts. This top 15 ranks posting activity among the public accounts we could assess, with active days breaking ties. Each profile includes median views, engagement metrics and linked post examples.
X is where a founder can announce a product, argue about an agent harness and make a joke about legal fees before lunch. A useful feed gives you a look at how someone thinks while the company is still being built.
We reviewed a shortlist of 60 YC founders and ranked the public accounts we could assess by their observed original posting activity from October 1 through October 30, 2026. These 15 came out on top. They span GPU engineering, legal services, voice AI, agent tools and finance software.
The order measures activity within that shortlist. It does not claim these are the 15 most active founders across all of Y Combinator, and it does not treat frequent posting as proof of expertise or business results.
The Ranking
Rank | Founder | Posts | Active days | Median views |
|---|---|---|---|---|
1 | 52 | 18 | 1,246.5 | |
2 | 50 | 21 | 364 | |
3 | 43 | 22 | 90 | |
4 | 33 | 17 | 366 | |
5 | 31 | 12 | 193 | |
6 | 29 | 17 | 824 | |
7 | 28 | 12 | 887.5 | |
8 | 25 | 16 | 1,966 | |
9 | 24 | 15 | 556 | |
10 | 23 | 10 | 197 | |
11 | 21 | 14 | 1,080 | |
12 | 11 | 8 | 275 | |
13 | 11 | 7 | 253 | |
14 | 9 | 8 | 19,139 | |
15 | 9 | 7 | 225 |
Post counts cover the same 30-day window. Median views describe the middle observed post, shown as captured, including half-view medians when the sample size is even. Views and engagement were captured on October 31 and can change.
How We Ranked These YC Founders on X
We started with 60 names, verified personal handles where possible, and checked 49 public accounts. One account was private and 10 could not be matched to a verified public X handle, so those 11 remain unranked. Five of the checked handles returned no indexed posts and had unavailable timelines; zero observations do not establish inactivity.
Activity comes first: observed original post count, followed by the number of UTC days with a qualifying post. Quotes with commentary are included. Replies and simple reposts are excluded from the search query; where searches failed, we checked the public Posts timeline through the date cutoff and excluded visible reposts. Public search and timelines can omit posts, so these are source-based observations rather than an API-certified census.
We also recorded median views and median per-post engagement per 1,000 views, calculated as (likes + replies + reposts) ÷ views × 1,000. Bookmarks are excluded. These performance measures do not change the activity order, and they do not establish leads, sales or unique audience size.
The linked examples below are the highest-view observed posts for each person in the window. Read them as examples to inspect, rather than endorsements of every claim in them. Some are quote posts, so their context includes another author’s original post.
1. Shiv Kampani
Shiv Kampani is the CTO of Autumn, a people intelligence platform.
Follow for: AI infrastructure, hiring and founder-led product distribution.
Shiv has the kind of feed where a hiring post sits next to a product challenge and a joke about using AI to write the next post. His October hiring announcement describes the actual work: search over billions of people, model training and finding someone who can turn the work into attention.
That specificity gives readers something to evaluate. He led this shortlist with 52 observed posts across 18 days. His highest-view post reached roughly 125,000 views, while his median was about 1,247. Both figures belong in the story: regular participation and occasional breakouts.
October activity: 52 posts across 18 days, or 12.1 posts per week. Median views: 1,246.5. Median engagement per 1,000 views: 18.5.
Must-Read Posts
- The search and engineering roles Autumn is hiring for
- Taking Autumn to a competitor’s conference
- A reaction to AI writing and style imitation
2. Narayana Aaditya Ganeshkumar
Narayana Aaditya Ganeshkumar, who posts as Nars, is a cofounder of Skillsync.
Follow for: Product demos, agent workflows and building in public.
Narayana Aaditya Ganeshkumar on X
Nars makes a good case for showing the product before explaining the category. His strongest October posts include a Claude Code modification and a short search demo. You can watch an idea become a behavior on screen, which is more useful than another paragraph announcing that the future has arrived.
He posted on 21 of the 30 days we checked. The two leading demos each passed 17,000 observed views, well above his 364-view median. Follow for the small, concrete things an agent can do today.
October activity: 50 posts across 21 days, or 11.7 posts per week. Median views: 364. Median engagement per 1,000 views: 21.6.
Must-Read Posts
3. Javed Qadruddin
Javed Qadruddin is the CTO and a cofounder of General Legal.
Follow for: Applied AI, internal evaluations and the realities of legal work.
Javed’s strongest October example starts inside the work. General Legal had been testing how different models use an internal knowledge system, and he shared an observation about how their results differed. It is a much more interesting starting point than declaring that every profession is about to disappear.
He was active on 22 days, the highest active-day count among these 15. His 43 posts put him third by volume, though the median post drew 90 views. This is a feed to read for a working technical perspective, rather than a guarantee of large audiences.
October activity: 43 posts across 22 days, or 10.0 posts per week. Median views: 90. Median engagement per 1,000 views: 31.2.
Must-Read Posts
- What internal evaluations revealed about models and knowledge bases
- Where lawyer review still fits in an AI workflow
- A take on how AI innovation spreads
4. Ryan Walker
Ryan Walker posts about General Legal and the practical problems founders face when buying legal services.
Follow for: Startup legal resources, open-source distribution and law-firm economics.
Ryan’s update on General Legal’s free template library is a useful example of a founder having something concrete to give away. The post reported more than 3,100 GitHub stars and explained why the company made its legal templates free. Readers could inspect the work instead of taking the founder’s word for it.
The feed also has room for a joke about the three associates who somehow arrive on every legal call. That mix of useful resources and recognizable frustrations gives people a reason to return between company announcements.
October activity: 33 posts across 17 days, or 7.7 posts per week. Median views: 366. Median engagement per 1,000 views: 16.5.
Must-Read Posts
- The legal template library passes 3,100 GitHub stars
- A view on the value of a law firm’s data and people
- A founder, a GC and outside counsel get on a call
5. John Jeong
John Jeong works on interfaces for humans and agents at Fastrepl.
Follow for: Product design, personal agents and the details of useful software.
John’s feed is interested in the parts of software that still feel unfinished. His October post on productivity tools asks why assistants, browsers and workspaces are getting so much attention while daily notes and to-do lists remain relatively familiar. It is a product question with a point of view.
A separate piece about choosing an agent’s computer moves from the general idea to the decisions underneath it. Follow him if you like seeing someone think through what a tool should feel like, rather than only reading the launch announcement.
October activity: 31 posts across 12 days, or 7.2 posts per week. Median views: 193. Median engagement per 1,000 views: 8.0.
Must-Read Posts
- What productivity apps still leave unfinished
- A preview of Char
- Choosing an agent’s computer by design
6. J.P. Mohler
J.P. Mohler posts as JP Mohler and writes about General Legal and the business of legal services.
Follow for: Open-source strategy, legal-industry incentives and pointed founder opinions.
JP’s explanation of why General Legal open-sourced its legal documents is the clearest place to start. He argues that the documents provide scaffolding, while the people and the work are what distinguish the firm. It turns an apparent objection into an explanation of how the business thinks about value.
That post reached about 88,700 observed views against an 824-view median for the month. The feed has a sharper edge than a conventional company account, including jokes at the expense of the billable hour. Read it for the argument and the voice behind it.
October activity: 29 posts across 17 days, or 6.8 posts per week. Median views: 824. Median engagement per 1,000 views: 11.1.
Must-Read Posts
- Why open-source the core legal documents?
- A critique of AI law-firm economics
- A joke about saving the billable hour
7. Ishaan Sehgal
Ishaan Sehgal shares product launches and developer community work around Omnara.
Follow for: Open-source agents, builder events and practical product demos.
Ishaan’s October posts connect the software to the people using it. One describes Omnara’s Hacker News launch as an open-source alternative for durable agents. Others bring developers together for a demo night or a hackathon with an emphasis on building something that runs for real users.
The result is a feed with somewhere to go after reading it: try the project, watch what someone built or join an event. His 28 observed posts placed him seventh on this activity list.
October activity: 28 posts across 12 days, or 6.5 posts per week. Median views: 887.5. Median engagement per 1,000 views: 23.2.
Must-Read Posts
- Contrarian bets from an agent builders demo night
- Launching Omnara on Hacker News
- An invitation to the Agent Builders Hackathon
8. Steven Arellano
Steven Arellano is a cofounder of Wafer and posts as steve at @gpusteve.
Follow for: GPU programming, CUDA and AI performance engineering.
Steve’s feed is a reading list for people who want to understand what makes AI software run faster. His CUDA Programming Guide post names the subjects that matter, from memory management to asynchronous execution and multi-GPU synchronization. Other posts point readers toward GPU Mode lectures and the less glamorous parts of compilation.
It is specific enough that a technical reader can act on it. Across 25 observed posts, his median view count was 1,966. The leading CUDA guide post reached about 29,700 views. Start here if your version of a useful feed includes homework.
October activity: 25 posts across 16 days, or 5.8 posts per week. Median views: 1,966. Median engagement per 1,000 views: 21.1.
Must-Read Posts
- Why read the CUDA Programming Guide
- What the GPU Mode lecture series covers
- Where to start with CUDA compilation and disassembly
9. Vishnu Sampathkumar
Vishnu Sampathkumar is the cofounder and CEO of Autumn.
Follow for: People intelligence, go-to-market tools and candid technology commentary.
Vishnu’s October feed mixes company-building with fast reactions to the technology conversation. His highest-view post was a short quote-post reaction to an industry development. It reached roughly 339,000 observed views, compared with a monthly median of 556.
That gap is a useful reminder of what X can reward: timing and a sharp reaction can travel much farther than a company update. His other leading posts bring the reader back to Autumn’s hiring and product conversation. Follow for both sides of a founder’s feed.
October activity: 24 posts across 15 days, or 5.6 posts per week. Median views: 556. Median engagement per 1,000 views: 19.1.
Must-Read Posts
- A short reaction to an AI-industry development
- Autumn’s hiring announcement
- A customer-side take on go-to-market tools
10. Nishant Joshi
Nishant Joshi is the cofounder and CTO of Skillsync.
Follow for: Small product experiments, developer humor and a builder’s perspective.
Nishant’s feed keeps the scale human. One of his strongest October posts jokes that fame means having 200 GitHub followers. Others show jev handling surprisingly specific prompts. The tone feels closer to a developer showing a friend what they made than a launch committee approving a message.
His 23 observed posts landed on 10 days, with a median of 197 views. This is a smaller-audience account where the experiments and jokes are the point. You do not need a six-figure impression count to find an interesting person to follow.
October activity: 23 posts across 10 days, or 5.4 posts per week. Median views: 197. Median engagement per 1,000 views: 22.7.
Must-Read Posts
11. Michelle Marcelline
Michelle Marcelline is a cofounder of The Prompting Company.
Follow for: Agent-driven discovery, product updates and the working life of a founder.
Michelle connects a product announcement to a recognizable change in how customers find things. Her October update discusses tracking product visibility across AI agents and the prospect of agents taking on more of the shopping process. The useful part is the connection between a product capability and a behavior buyers may adopt.
The feed also makes room for the less polished side of the job, including why weekends can feel like the only time left to build. Her 21 observed posts had a median of 1,080 views, and the leading product update reached about 19,400.
October activity: 21 posts across 14 days, or 4.9 posts per week. Median views: 1,080. Median engagement per 1,000 views: 28.0.
Must-Read Posts
- Tracking products across AI-agent experiences
- A founder weekend with the Brex team
- Why weekends can feel like the time for actual work
12. Rohan Vasishth
Rohan Vasishth writes about voice AI and the people building conversational systems.
Follow for: Voice interfaces, industry conversations and founder judgment.
Rohan’s strongest October post responds to a new speech model with a clear view that voice has more room to grow. Another describes a dinner with conversational AI leaders. Together, they offer a view of the category through both the technology and the conversations around it.
He posted 11 times across eight days, placing ahead of another account with the same post count because he appeared on more days. Follow for a founder’s view of how the voice market is developing, with occasional opinions about the relationships around startup building.
October activity: 11 posts across 8 days, or 2.6 posts per week. Median views: 275. Median engagement per 1,000 views: 19.4.
Must-Read Posts
- A reaction to the next wave of speech models
- A dinner with conversational AI leaders
- A view on investor and founder relationships
13. Kartik Sarangmath
Kartik Sarangmath is a cofounder of Omnara.
Follow for: Agent infrastructure, practical engineering tradeoffs and product experiments.
Kartik asks the questions that appear after a promising demo: should this be a separate product, can you build it with a general agent harness, and why is the sandbox still running when nobody is using it? His post on building a PR review bot makes a concrete argument about the value of another platform fee.
A separate post on putting idle sandboxes to sleep is even more direct. It offers an implementation decision a reader can investigate. Follow for the work between an agent being possible and being worth running.
October activity: 11 posts across 7 days, or 2.6 posts per week. Median views: 253. Median engagement per 1,000 views: 27.4.
Must-Read Posts
- Building a PR review bot with an agent harness
- Building agent products beyond chatbots
- Why an idle sandbox should sleep
14. Eric Glyman
Eric Glyman is a cofounder of Ramp.
Follow for: Company storytelling, ambitious marketing and finance software with a personality.
Eric’s October feed includes a funding announcement, an accounts-payable Broadway musical and a Tony Hawk collaboration. That is a wider creative range than most finance software gets through a brand review. The posts work as examples of giving a company a story people can repeat.
He ranked fourteenth here because we observed nine posts, not because his audience was small. His median of 19,139 views was the highest among these 15, and the leading funding announcement reached about 695,000. Posting activity and reach tell different stories.
October activity: 9 posts across 8 days, or 2.1 posts per week. Median views: 19,139. Median engagement per 1,000 views: 10.9.
Must-Read Posts
- Ramp’s October funding announcement
- A Broadway musical about accounts payable
- The Tony Hawk collaboration
15. Faraz Siddiqi
Faraz Siddiqi is the cofounder and CTO of Bluejay, working on voice evaluations and data.
Follow for: Voice-model evaluations, realistic benchmarks and engineering requirements.
Faraz’s strongest October post introduces a speech-to-text benchmark built around imperfect real-world audio. That is an immediately understandable problem: a clean demo recording does not tell you how a system behaves when the audio is difficult.
His other posts continue into model comparisons and the tradeoffs between price and reliability. With nine observed posts on seven days, he takes the final place on this list through the active-day tie-break. Follow for the questions a voice product has to answer after the demo.
October activity: 9 posts across 7 days, or 2.1 posts per week. Median views: 225. Median engagement per 1,000 views: 32.6.
Must-Read Posts
- Introducing the MISTT speech-to-text benchmark
- A voice-model benchmark update
- The case for a cheaper, reliable speech-to-speech model
Build a Feed That Helps You Build
Start with the work you want to understand. Read Steven Arellano for GPU performance, Javed Qadruddin for applied AI inside legal work, Kartik Sarangmath for agent infrastructure and Faraz Siddiqi for voice evaluations. Eric Glyman offers a different kind of lesson: how to give a finance company a story people want to repeat.
Then look beyond the largest post. A founder with one breakout quote post and a founder who teaches something useful every week can both be worth following. The table helps you compare activity; the linked posts help you decide whose thinking you want in your feed.
For another feed worth building, see our 15 LinkedIn marketing influencers to follow.
Common questions
How were these YC founders ranked on X?
The list ranks observed original posts from October 1 through October 30, 2026, within a 60-founder shortlist. Active UTC days break ties. Quote posts are included; replies and simple reposts are excluded. Public-source coverage limitations are disclosed.
Does this list rank every YC founder?
No. It covers a shortlist of 60 founders. We checked 49 public accounts; one account was private and 10 did not have a verified public X handle.
Why is Eric Glyman fourteenth despite his higher median views?
The order measures posting activity. Eric had nine observed posts across eight days. His median of 19,139 views was the highest among the 15, but reach is reported separately from activity.
How we research, write and correct these posts is in our editorial policy.
