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Slingshot AI

Foundation model for psychology powering Ash, a consumer AI therapy companion

Mental HealthConsumer AI TherapyFounded 2022 · New York, NY (second office in London)Website

Updated 3d ago

Valuation

Total raised

$93.0M

Series A extension

Est. revenue

Momentum

7/10

Maturity

3/10

Headcount

~40

Funding rounds
Disclosed round sizes
Business focus

Building the first special-purpose foundation model for psychology and applying it in Ash, a voice/text consumer app marketed as 'the first AI designed for therapy.' The model is pre-trained on what the company calls the largest behavioral health dataset assembled, spanning CBT, DBT, ACT, psychodynamic therapy, gestalt, and motivational interviewing, then RL-tuned with clinician-graded reward signals. Target user is the huge population that cannot access or afford human therapy; positioning is a 'wellbeing' product, deliberately not an FDA-regulated medical device.

Revenue model

Effectively pre-revenue: Ash launched July 2025 as a free iOS/Android app. Stated plan is a direct-to-consumer subscription 'priced like Netflix' (consumer pays), with future distribution through employers and insurers contemplated but not launched.

No revenue figures disclosed anywhere; monetization had not visibly switched on as of mid-2026. Series A Jan 2025 amount undisclosed (a16z stated it brought total raised to $40M on top of the $30M seed); $53M extension brought total to $93M. Valuation never disclosed; Tracxn tags the company a 'soonicorn'. 150,000+ users reported Nov 2025; ~32-50 employees per PitchBook/Wellfound. Fact-check 2026-07-05: $93M total, July 2025 Series A extension ($53M, Radical/Forerunner co-led), CEO Daniel Reid Cahn, and no valuation disclosure all independently confirmed via BusinessWire/STAT/BHB; headcount 32-46 per PitchBook/LeadIQ (Apr 2026); no newer round, IPO, or acquisition found.

Strategy

Stated: democratize mental health support by giving anyone with a phone a free, clinically-informed AI companion, grow a massive consumer base first, then monetize via a Netflix-priced subscription and eventually employer/insurer channels. Inferred: a classic foundation-model land-grab — use $93M of venture compute to build a data flywheel (every session improves the psychology model) and clinical evidence base before regulators harden the rules, while lobbying (e.g., FDA comments) to keep 'general wellness' apps outside medical-device regulation; the UK withdrawal shows they will exit rather than pursue device clearance where the pathway is unclear.

Moat

Proprietary behavioral-health training corpus plus RL pipeline with expert clinical reward models — hard to replicate with general-purpose LLMs; a clinical team (ex-Noom/Talkspace) and 150k+ users generating longitudinal therapy-interaction data; brand as the purpose-built 'AI for therapy' backed by a16z/Radical/Forerunner. The moat is real but early — general chatbots are free substitutes and the dataset advantage compounds only if retention holds.

Future bets

Flip on a direct-to-consumer subscription (Netflix-like pricing) once the user base and habit loop are large enough

high

Explicitly stated by Neil Parikh at launch; the free app is a deliberate land-grab phase and investors will need revenue by the next raise.

Employer and insurer distribution of Ash as a covered mental-health benefit

medium

Stated as the intended second channel at launch; B2B2C is how consumer mental-health (Calm, Headspace, Spring Health) ultimately monetized at scale.

Invest heavily in RCT-grade clinical evidence and possibly pursue a regulated digital-therapeutic version of Ash

medium

The skeptically-received Nov 2025 study, FDA advisory scrutiny, and the UK exit all push toward formal evidence and a clearer regulatory posture as a competitive weapon.

License the psychology foundation model (API/platform) to other digital-health and provider companies

low

Inferred: 'foundation model for psychology' framing and research-lab identity suggest value beyond one consumer app; licensing hedges consumer monetization risk.

Raise a large Series B in 2026-2027 to fund compute and international re-entry under clearer rules

medium

Model training at 235B-parameter scale plus zero revenue implies another raise within 18-24 months of the July 2025 extension; 'soonicorn' investor positioning supports it.

Recent moves

Jan 2026

Withdrew Ash from the UK market (offline after Jan 23) citing lack of a clear regulatory pathway under UK medical-device rules.

Nov 2025

FDA Digital Health Advisory Committee met (Nov 5-6) on generative-AI mental health devices; Slingshot filed comments arguing media coverage had 'skewed the public's perception of risk' of wellness apps like Ash.

Nov 2025

Released its first safety/effectiveness study of Ash and disclosed 150,000+ users; researchers publicly questioned the study's methodology (STAT, Nov 24).

Aug 2025

Illinois enacted the first US state ban on standalone AI psychotherapy (signed Aug 1), a direct regulatory headwind for Ash-category apps.

Jul 2025

Public launch of Ash ('the first AI designed for therapy') as a free iOS/Android app after 18 months and 50,000 beta users, alongside a $53M Series A extension co-led by Radical Ventures and Forerunner Ventures ($93M total raised).

Jul 2025

Named winner of Nebius's inaugural AI Discovery Award; disclosed training stack (Qwen3-235B backbone, clinician-scored RL, two-pass safety guardrails) via Nebius customer story.

Mar 2025

Public research push: a16z and Felicis podcasts with the founders and clinical lead Derrick Hull outlining the foundation-model-for-psychology thesis.

Jan 2025

a16z led the Series A (announced Jan 14), bringing total raised to $40M; Vijay Pande joined the board.

Key people

Daniel Reid CahnCo-founder & CEO

ML engineer and AI-in-mental-health researcher (Imperial College London) who drives the foundation-model and safety agenda.

Neil ParikhCo-founder

Co-founded Casper, scaling it past $500M revenue to a 2020 IPO; holds 7 patents and leads brand/consumer strategy.

Derrick HullHead of Clinical (Clinical R&D)

Behavioral health scientist previously at Noom and Talkspace; leads therapeutic design and outcomes research.

Vijay PandeBoard member

a16z Bio + Health founding general partner; joined the board with the January 2025 Series A.

Alexey BukhtiyarovML Infrastructure Lead

Runs the Nebius GPU training stack (DeepSpeed/ZeRO-3, SkyPilot) behind Ash's model training.

Strengths
  • Marquee investor syndicate (a16z, Radical Ventures, Forerunner, Felicis, Menlo) with $93M raised within ~12 months
  • Purpose-built psychology foundation model (Qwen3-235B backbone, clinician-in-the-loop RL) rather than a prompt wrapper
  • Strong founder pairing: proven consumer builder (Casper's Neil Parikh) plus technical ML CEO (Daniel Cahn)
  • Fast consumer traction: 50k beta users at launch, 150k+ users by November 2025, on a free app with no paid acquisition of note
  • Credible clinical leadership (Derrick Hull, ex-Noom/Talkspace) and a two-pass safety guardrail architecture for crisis detection
  • Cost-efficient training infrastructure via Nebius keeps burn per experiment low relative to API-dependent rivals
Weaknesses
  • No revenue and an unproven monetization plan; consumer mental-health apps historically suffer brutal churn
  • Acute regulatory exposure: exited the UK entirely (Jan 2026), Illinois banned standalone AI therapy (Aug 2025), FDA advisory committee scrutinizing therapy chatbots
  • Clinical evidence base is thin — its November 2025 safety/effectiveness study was met with open skepticism from researchers
  • Free general-purpose chatbots (ChatGPT etc.) are the de facto competitor and cost users nothing
  • Small team (~32-50 people) spread across frontier model training, consumer growth, clinical research, and regulatory affairs simultaneously
Risks
  • State-by-state or federal regulation reclassifying AI therapy as a licensed/medical activity could shut off core markets, as Illinois and the UK already demonstrate
  • A safety incident (mishandled crisis, self-harm case) tied to Ash would be existential given media sensitivity after ChatGPT-linked tragedies
  • Monetization risk: users accustomed to a free app may not convert to a Netflix-priced subscription, and payers demand evidence Slingshot doesn't yet have
  • Sensitive mental-health conversation data creates outsized privacy/FTC liability
  • Foundation-model commoditization: frontier labs adding empathic 'wellness' modes could erode differentiation faster than the proprietary dataset compounds
Ecosystem

Competitors

Jimini HealthSpring HealthHeadwayHippocratic AIWysaYouperHeadspace (Ebb)General-purpose chatbots (ChatGPT/Claude) used informally for support

Technologies

Psychology foundation modelQwen3-235B fine-tuningReinforcement learning with clinician reward modelsLLM-as-judge evaluationTwo-pass safety guardrails / crisis classifiersVoice + text conversational interfaceDeepSpeed/ZeRO-3 distributed trainingiOS/Android consumer apps

Partnerships

Nebius (GPU cloud/training infrastructure partner; AI Discovery Award winner)Network of licensed therapists and clinical advisors supplying training/evaluation data (in-house program, not a named commercial partner)
Change history
Jul 5, 2026 · news

Nebius celebrates healthcare and life sciences innovators at expanded AI Discovery Awards - Business Wire (Business Wire)

Jul 5, 2026 · seed

Added to watchlist — initial intelligence profile created for Slingshot AI.