Founder & CEO at Limbic. Experimentalist, theoretician, entrepreneur, and loverer of suffixes. Trying to bring better data to mental health.

Joined July 2011
28 Photos and videos
Ross Harper retweeted
Infinite mental health services affordable @Limbic_ai. Key finding in Nature Medicine: nature.com/articles/s41591-0… Limbic Layer™ turns any frontier LLM into a behavioral health specialist, improving therapeutic performance (as judged by other therapists), patient experience, and clinical outcomes. 75% of Limbic's AI sessions ranked among the top 10% of human therapist sessions, demonstrating superior clinical performance in a fully autonomous setting. CBT rated superior to both human clinicians and underlying LLMs
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Ross Harper retweeted
In 2013, I predicted data science & software will do more for medicine in the next decade than all biological sciences combined. Today: Companies like @CuraiHQ, @Swordhealth, @AbridgeHQ, @SynchronInc, @CtheSignsSystem, @EllipsisHealth, @Limbic_ai, Radical Health, @a2zRadiologyAI, @RadAI, Travera, @ScienceCorp_ are proving this out across diagnostics, care delivery, mental health, radiology, and organ engineering.
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Over 1M people a week discussing suicidal thoughts on ChatGPT. Imagine the potential impact if @openai partnered with clinically validated AI mental health platforms like @limbic_ai // @refharper @sama @vkhosla x.com/ZeffMax/status/1982903…

27 Oct 2025
NEW: OpenAI released data on how widespread mental health problems are for ChatGPT's 800 million WAUs: 0.15% of users (over 1M/wk) have chats including "explicit indicators of potential suicidal planning or intent." 0.07% of users (>500K/wk) show signs of psychosis or mania
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Ross Harper retweeted
18 Jul 2025
It will soon be a violation of the Hippocratic oath to not use AI in healthcare.
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23 Jan 2025
Rather than seeing the market diversify with AI solutions, we might witness a natural filtering process where companies that make evaluation straightforward for their customers emerge as leaders, while others struggle to build trust in this "buyer beware" environment.
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23 Jan 2025
Disclaimer: I'm not an expert on policy strategy.
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Ross Harper retweeted
20 Dec 2024
💌 Thank you to our partners, clinicians, and colleagues for helping us make mental healthcare more human. Together, we’re building a world of accessible, compassionate care. Wishing you peace, joy, and moments of rest this season. Here’s to a brighter New Year! 🕊️
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Ross Harper retweeted
10 Oct 2024
On #WorldMentalHealthDay, we send a big thank you to our hard working clinicians who provide hope, compassion, and a safe space to be heard. Your work changes lives every day. Thank you for being there for those who need it most 💌
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Machine learning, deep learning, and other core AI technologies have been around for a while, but now, in 2024, we’re witnessing practical, material transformation across sectors - finance, education, manufacturing, and especially healthcare.
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This tool (and it is a tool) is driving real value in efficiency, satisfaction, and care quality. We’re living through a thrilling moment of human history, and for every success we’ve had at Limbic, I recognise we stand on the shoulders of giants.
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Huge congratulations to @demishassabis, John Jumper, and @davidbakerA2 for their Chemistry prize, and to @geoffreyhinton and John Hopfield for their Physics prize.
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The 2024 Nobel Prizes in Physics and Chemistry were just awarded for AI-centred projects, signalling yet another shift in the level to which #AI is being embraced today. This is no longer just an idea or buzzword thrown around at conferences.
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19 Sep 2024
A fun and surreal moment in my founder journey yesterday - I made my #Netflix debut on @BillGates new series "What's Next?" I stumbled upon it by chance as a regular Netflix viewer, which made the experience even more memorable. (I will be setting up my #IMDb page immediately).
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19 Sep 2024
Jokes aside, it is a great reminder of the important work we're doing at @Limbic_ai and the fact that we really are at the leading edge of AI in mental healthcare.
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19 Sep 2024
320,000 patients supported so far. Still a long way before quality mental healthcare is available to everyone, everywhere. We’re here to make that happen.
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19 Sep 2024
Jokes aside, it is a great reminder of the important work we're doing at Limbic and the fact that we really are at the leading edge of AI in mental healthcare.
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15 Aug 2024
The conversation was under Chatham House rules, so below are my personal views:
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15 Aug 2024
🔑 Adoption is key. The government should aim to incentivise AI adoption across sectors. Safety must be prioritised, but we cannot forget that progress requires courage. Large-scale AI adoption will drive efficiencies, raise GDP, and stimulate substantial economic growth.
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15 Aug 2024
I’m excited about the future we’re building—one where the UK leads the world in AI innovation. Grateful for all the incredible people I get to work with on this important mission.
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