Dec 8, 2025 · 47m · 20vc
Kalshi CEO Tarek Mansour on Raising $1BN, CNN and CNBC Deals & the Polymarket Feud · 20VC with Harry Stebbings
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In this interview on 20VC, Kalshi Co-Founder and CEO Tarek Mansour discusses the company's historic $1 billion funding round, their landmark legal victory against the CFTC, the nature of their rivalry with Polymarket, and their strategic media integrations with CNN and CNBC aimed at democratizing prediction markets.
How this conversation actually went
Every chapter scored 0–10 on four independent dynamics. Hover any point for the reasoning behind the score. Harry holds 22.3% of the talking time here. How this is scored →
Harry as informed peer 4.7 Guest teaching 4.2 Guest disagreement 1.7 Harry pushing back 4.3
speaking balance: gold is Harry, purple is the guest (3 minute bins)
Sharpest disagreement ▶ 3:37 Rejecting category kingmaking
Tarek forcefully rejects Harry's premise that huge capital can crown a winner, offering DoorDash beating Uber Eats as proof that product beats capital.
Hardest push from Harry ▶ 4:09 Unwavering belief in VC kingmakingHarry explicitly refuses Tarek's rejection of capital kingmaking, asserting his unwavering stance that VC capital deployment forces winner-take-all outcomes.
Biggest teaching moment ▶ 28:53 Deconstructing Alfred Lin's advisory nuanceTarek educates Harry on what makes Alfred Lin an elite investor, detailing how Lin systematically argues the exact opposite of any proposal to force balanced analysis.
Harry holds his own ▶ 30:56 Calling out founder VC-hiring hypocrisyHarry forcefully dismantles the popular founder claim that candidates shouldn't join due to top VCs, calling it utter crap and articulating why top signaling attracts winners care is rational.
the scores for every segment, with the reasoning behind each
| Chapter | Topic | Harry as informed peer | Guest teaching | Guest disagreement | Harry pushing back | Why |
|---|---|---|---|---|---|---|
| Why Kalshi Raised One Billion Dollars | 2 | 4 | 1 | 2 | Harry asks straight questions about why Kalshi raised a billion dollars and what it enables. Tarek educates Harry on financial exchange reserve requirements and clearinghouse dynamics. | |
| The Debate Over King Making and Capital | 6 | 3 | 3 | 6 | Harry strongly challenges Tarek's rejection of capital kingmaking by asserting his own experience with VC funding dynamics. Harry also presses Tarek on the sports betting label. | |
| Robinhood's Entry and Market Acceleration | 4 | 4 | 1 | 2 | Harry cites investor conversations regarding TAM and asks about Robinhood's market entry. Tarek reframes their CFTC legal victory as prediction markets' ChatGPT moment. | |
| The Polymarket Feud and the Power of Rivalry | 5 | 3 | 3 | 6 | Harry refuses to let Tarek dismiss the Polymarket rivalry with a generic boxing analogy, comparing it directly to Deal versus Rippling and asking if Tarek respects Shane Coplan. | |
| Media Partnerships and Kalshi's Brand Strategy | 3 | 5 | 1 | 3 | Harry asks about Kalshi's brand strategy and lowest moments, prompting Tarek to share the severe emotional impact of CFTC pocket vetoes and team member departures. | |
| Evolving from Founder to CEO | 6 | 5 | 2 | 6 | Harry challenges Tarek on whether financializing culture is net positive and whether pro traders hold asymmetric advantages over retail users. Tarek corrects this by highlighting political domain knowledge over Wall Street edge. | |
| Partnering with Legacy Media versus Owning the Stack | 5 | 4 | 2 | 6 | Harry pushes Tarek on why Kalshi partners with CNN/CNBC instead of building and owning its own media network. | |
| Balancing Breadth and Depth in Marketplace Inventory | 4 | 4 | 1 | 2 | Harry quotes early investor Don Stalter regarding protecting pro rata rights against aggressive top-tier funds. Tarek explains his philosophy of infinite iterated games in venture relationships. | |
| The Impact of Alfred Lin, Sequoia, and Elite Investors | 7 | 5 | 2 | 5 | Harry forcefully calls out founder dogma regarding hiring people attracted by Sequoia backing. Tarek breaks down Alfred Lin's unique counterbalancing board style. | |
| SBF, FTX, and the Power of Regulatory Compliance | 5 | 5 | 1 | 4 | Harry asks about SBF and FTX, leading Tarek to explain how investors pressured Kalshi to go offshore before FTX collapsed, reinforcing their regulatory-first commitment. | |
| Celebrity Dream Matches and the Underdog Mentality | 5 | 4 | 2 | 5 | Harry questions whether VCs are overestimating the emotional maturity of 17-year-old founders getting multi-million dollar checks. Tarek outlines how he and co-founder Luana stay grounded. |
Statements from this episode (29)
Mansour: Kalshi's election growth was prediction markets' ChatGPT moment
“Kind of what happened with Kalshi in the election was a bit of a Chad GPT moment for our industry.”
Stebbings: Kalshi announced a $1B raise at an $11B valuation
“In the last week, they announced their one billion dollar raise and an eleven billion dollar valuation.”
Mansour: Kalshi is the fastest-growing non-AI US company at scale
“Kalshi this year is at this scale, at least, you know, the, I think the fastest growing company in America outside of AI. I think Anthropik is growing faster, and I'm not sure about Merkur and Cursor, but we're, you know, growing at that sort of, at that pace,…”
Mansour: Kalshi is currently profitable
“We are at a point right now where, so we're growing incredibly fast. We are also profitable right now.”
Mansour: Superior products will always defeat competitors with more capital
“I, I'm maybe, maybe I'll lean a little bit more on the other side, which is like a better product will trump. Any day.”
Mansour: DoorDash defeated Uber Eats through product superiority, not capital
“Uber Eats had, I mean, infinite capital to, compared to DoorDash, but Tony Bell's a better product and Tony won, right?”
Mansour: Excessive capital causes company inefficiency and unforced errors
“Oftentimes a lot of money can create like inefficiency and like, you know companies start making a bunch of unforced errors when a lot of money comes in.”
Mansour: Culture prediction markets represent a massive unaddressed TAM
“I actually think like what's happening with Taylor Swift, you know, movies and how successful they're going to be, anything around culture like that, that is massive unaddressed, unaddressed tam right now.”
Mansour: Sports betting dominance is temporary; culture markets will scale
“And it's a matter of time to like, you know, we scale the number of markets, we scale the liquidity, and I think those one day will be very big. So sports is very big right now, but I don't think it's kind of like a, I think it's a moment in time.”
Mansour: Kalshi sued the CFTC and won in October 2024
“So in 24, we won the fight against the government. We won that, that we sued the government and then we won that fight in October seven, 24.”
Mansour: Robinhood is a partner of Kalshi in prediction markets
“They've been incredible partner of ours on the prediction market front.”
Stebbings: I regret not providing a longer transition leaving my old fund
“When I left my old fund, you know, I was very quick in leaving and I really left no time for transition. I was quite thoughtless in my old partner. And I really regret that. I'm like, I should have given more time, been more thoughtful and caring. And with the…”
Mansour: An industry truly becomes an industry when there is a rivalry
“What I'm really, what I'm learning over time is that an industry truly becomes an industry when there's a rivalry. Because that rivalry will push you... We'll, we'll push you to, we'll push you beyond the, like, the limits of what you thought you could get to.”
Mansour: Kalshi and Polymarket pushed each other's product and marketing harder
“Without Polymarket, we wouldn't have I think like, Pushed our marketing and pushed our product as hard. And without us, they wouldn't have pushed their marketing and their product.”
Mansour: DraftKings and FanDuel are among the world's best marketing spenders
“Traditional players, like, you know, Draftskins and FanDuel, they have really effective, I would say like marketing machines. They're like some of the best spenders of dollars on the planet.”
Mansour: Kalshi secured exclusive media partnerships with CNN and CNBC
“So this week we've announced well, we found the first and then the second large scale news network partnership with the prediction market. So we announced CNN exclusive partnership and then CNBC, the same thing the next day.”
Mansour: Kalshi lost team members twice before suing the US government
“The next day we came back, and we were like, we're gonna try again for the twenty-twenty-four election. And then we tried another year till the end of twenty-twenty-three. Then the government blocked it again. And then, so that's the second time. And then God …”
Mansour: Company Scaling Requires Shift From Sprints to Consistent Habits
“I think like it's less about some specific department lacking, but more about like consistency now. How do we move that into like a scaled, consistent set of habits in the company rather than like a series of sprints?”
Mansour: Traditional financial markets are rigged in favor of Wall Street
“The current financial markets, they don't relate to a lot of people like, you know, trading stocks or options or futures, like people don't really understand them. And the game is sort of rigged. It's rigged on behalf of like for Wall Street against Main Stree…”
Mansour: Only 1 to 2 percent of prediction market users actively trade
“Out of every hundred prediction market users, maybe there's like one or two traders that are actually trading on the market, but the rest of the users are getting informed about the world.”
Mansour: Kalshi resolves election outcomes 5-7 hours faster than news networks
“You go on the traditional news networks and like, You don't know who won until five, 6:07 hours after Kalshi, right?”
Mansour: Kalshi can build its own news network while partnering with legacy media
“I think we can. They're not mutually exclusive. Like I think we can do both.”
Mansour: Prediction markets must balance broad inventory with concentrated liquidity
“You cannot go fully vertical because then your product offering is not diverse and interesting enough, and you cannot go fully wide because then you don't concentrate enough liquidity in specific events.”
Mansour: Compliance and regulation are mandatory for enduring fintech and healthcare startups
“I think in financial services and healthcare, The only way to build something that will last the test of time and that will truly go mainstream is to work with regulators, to do it clean, to do it right.”
Mansour: Founders must build product and marketing engines simultaneously
“Maybe it's the YC thing, which is build a great product and people will come. I, you know, I think build a great product, but build a great marketing engine and scramble to do both at the same time is now my best answer to this.”
Mansour: Kalshi is in active partnership discussions with Lionel Messi's team
“We have talked to, I think we are talking to his team right now, so we'll, we'll figure something out”