Louis Mosley

Can the NHS control the data when it’s using Palantir—is patient data safe? Are the Palantir tools working? The answer to both those questions is a categoric yes. Using or abusing NHS data is not our business model, and it is also against the law.

The Health Foundation does serious work. But its critique of NHS England’s OPTICA data is fundamentally flawed. The Financial times has glossed over those flaws but they really matter. Here's what they are. NHS England’s data shows a 14.1–14.9% fall in long-stay discharge delays at trusts using OPTICA, the FDP tool built to help manage complex hospital discharges. The Health Foundation claims there was “no noticeable improvement”. One of these conclusions is wrong. Plot twist: it's not the one from the people doing the actual work. Most hospital discharges are simple: the ward sends the patient home, nothing to arrange. They’re quick by design. Complex discharges need a care home place booked, equipment ordered, a district nurse briefed, across four or five organisations. Those patients are fewer in number. They wait the longest. OPTICA was built for them. The Health Foundation averaged both groups and asked whether the tool worked. That’s like judging a cardiac unit by the average blood pressure of the whole hospital, hernia repairs included. Worse, its metric is the share of all occupied beds held by any delayed patient. The right measure is delay-days in the long-stay group. Short-stay patients outnumber long-stay many times over, so real long-stay gains vanish into the average, and the average moves whenever A&E surges or wards close. If OPTICA had cut every complex delay in half, this study would still have found nothing. NHS England’s own evaluation isn’t beyond scrutiny either. That’s why we back the independent Imperial College London evaluation. We’ll continue backing the clinicians and coordinators doing this work every day. So if you’re judging OPTICA, start by understanding what it was built to do.

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Opinions on @PalantirTech may vary. Our focus does not: we give the West and its allies the software they need to win.

“Palantir is a very big and very dangerous outfit.” This was said in the House of Commons by Jeremy Corbyn MP last month. You can read his full contribution to the debate in Hansard: #contribution-84E5228C-59BD-43A9-A62C-3436F20F9417" target="_blank" rel="nofollow noopener">hansard.parliament.uk/commons/2026-0…

We will not tire of repeating: Palantir is one of the greatest threats to the modern world. Palantir is a very big and very dangerous outfit. The company has been a genuine partner during the hardest times of a war for our existence. One of these quotes is from a wartime Ukrainian broadcast across 30 channels. One is from the chief spokesperson of the Russian Ministry of Foreign Affairs. One is from a prominent British politician. See if you can guess which is which.

Palantir is proud to support Ukraine. A segment from Ukraine’s wartime broadcast on our role in helping defend Ukrainian sovereignty: “A genuine partner during the hardest times of a war for our very existence.”

Ethan’s mother was an NHS nurse. Today at Palantir, Ethan builds the software NHS mental health teams rely on to save lives in crisis. For him, it’s personal. If that sounds like the ultimate reward to you too, come join us.

How to land a job as Palantir's head of vibes: - wear a crappy Palantir hat at your old gig so often that the org makes you its liaison to Palantir - in that capacity, meet Alex Karp - say "I'll start on Monday" when he spontaneously asks how you'd respond to being offered a job - identify the opportunity cost of that forgotten little cost center of a merch store that you once bought a crappy hat from - pitch Karp on making the hats (and shirts) awesome - use awesome hats (and shirts) to demonstrate the existence of Palantir's fans and also to create new ones Meet Palantir's vibrations wizard, also known as the lead senior intern of the garment division, @eliano:

Other locations available: palantir.com/careers/open-p…

Someone should build a company around this!

While parliament argues about whether to keep Palantir, two Nature papers show agentic AI systems outperforming physicians in emergency and outpatient settings. The FDP is the only operational platform that could provide the foundation. computerweekly.com/news/366645657…

Amidst the noise of the NATO summit today, serious questions remain about Europe’s operational readiness. We need capabilities, not just communiqués. Palantir’s Maven Smart System is one answer. It’s been operational at NATO military headquarters since last week. Decisions that took hours now take minutes. This is what a stronger Europe actually looks like.

“I wouldn’t be surprised if 2026 is remembered for centuries to come as a year in which a major breakthrough in military technology was made—akin to gunpowder and the like—which is autonomy,” Louis Mosley of Palantir told me. The key feature of the war between Russia and Ukraine, and likely of other major conflicts to come, is that what used to be cutting-edge weapons and technologies becomes outdated within months. “If you have an adaptive adversary, it’s the speed of iteration and the rate of learning that matter, rather than the technology per se,” Mosley added. @louismosley wsj.com/world/war-tech…

On which note: we’re hiring. Lots. The UK is our second home - a fifth of the company is here - and we’re growing it, evil reputation be damned. There’s something clarifying about being called a tax dodger, an NHS menace, and a danger to the nation’s hips in the same week you’ve actually helped deliver thousands of operations and put the software that defends Europe into the field. If doing manifest good and getting roundly abused for it sounds like your idea of fun, come and join us. (Reading/watching/actually understanding Lord of the Rings is not a prerequisite). palantir.com/careers/open-p…

And just to reiterate why it might be a mistake to kick Palantir out of the NHS… According to the NHS itself, Palantir’s software has helped deliver: ⬆️ more than 111,000 additional operations. ⬇️ a 15% reduction in discharge delays for long stay patients. ⬆️ a 6.8% increase in patients finding out whether they have cancer in 28 days. ✅ a green delivery rating - one of 30 out of 213 major government programmes. 💷 forecast benefits of £5 back for every £ spent.

A quick audit of my week, since people ask what it’s like at Palantir. ✅ Brought NATO’s first AI-enabled command system to full operational capability, live across the Alliance’s classified networks. ✅ Was declared evil. ✅ Accused of dodging tax I demonstrably overpay. ✅ Informed that the software 32 nations now trust to deter Russia — the same software that’s helped the NHS deliver 110,000 extra operations and faster cancer diagnoses — may be deemed too hazardous to be used to schedule hip replacement operations back home. ✅ Remained evil. The rule seems to be: the more it works, the angrier the room. Onwards.

You’d almost think it was politically motivated 🤔