Quick Verdict
Wysa is the most evidence-supported AI chatbot (30+ peer-reviewed papers). Headspace and Calm lead on meditation with strong, well-documented efficacy for stress and sleep. For access to a licensed therapist, BetterHelp has the largest network, with the caveat of a 2023 FTC settlement around data-sharing practices that every user should read our review to understand. Cerebral has documented DOJ/DEA regulatory history around controlled-substance prescribing — see our review for the current status.
None of these apps substitute for professional care during a crisis. If you or someone you know is in distress, the crisis-support section at the bottom of this page has free, 24/7 resources.
Ranked List
- Wysa — Best AI chatbot evidence base (30+ peer-reviewed papers).
- Woebot — Consumer-facing app shut down; enterprise/payer licensing only. Details.
- Headspace — Best meditation + AI companion (Headspace Ebb).
- Calm — Best meditation + sleep content library.
- BetterHelp — Largest licensed-therapist network. Read our review for FTC history.
- Cerebral — Telepsychiatry + medication. Read our review for DOJ/DEA history.
Clinical Evidence
We weight peer-reviewed evidence heavily. Wysa has 30+ peer-reviewed papers including randomised controlled trials in anxiety and depression. The 2025 Dartmouth Therabot RCT (NEJM AI) reported a 51% average reduction in depression symptoms — the largest RCT to date on a generative-AI mental-health chatbot. Woebot has multiple RCTs, though its consumer app has since been withdrawn. Headspace and Calm have sleep-focused efficacy studies; BetterHelp and Cerebral are licensed-therapist networks rather than AI apps (efficacy depends on the individual therapist).
See our FDA-cleared AI health tools guide for regulatory-clearance status. See Is AI therapy safe? for the safety framing.
Pricing Snapshot
| App | Free Tier | Paid (Monthly) | Category |
|---|---|---|---|
| Wysa | Yes (tools only) | $99/mo Premium Plus (coach + tools) | AI chatbot + optional coach |
| Headspace | Limited | $12.99/mo | Meditation + AI companion |
| Calm | Limited | $14.99/mo | Meditation + sleep |
| BetterHelp | No | $240–$360/mo (weekly sessions) | Licensed therapist network |
| Cerebral | No | $259/mo therapy, $325/mo + medication | Telepsychiatry |
Risks & Safety
AI therapy chatbots have documented failures in crisis detection and have, in reported cases, given unsafe advice. Do not rely on an AI chatbot as your sole mental-health resource during a crisis. Companion-style apps (Replika, others) have documented emotional-dependency and historical inappropriate-content concerns. For regulatory-history-heavy platforms (Cerebral DOJ/DEA; BetterHelp FTC settlement), we surface the history in each review — please read before signing up.
What These Apps Are Good For
- Supplementing professional care (not replacing)
- Building coping skills (CBT-style exercises, mood tracking)
- Between-session support
- Stress reduction and sleep (Headspace, Calm)
- Access to a licensed therapist (BetterHelp) in areas with limited in-person options
What They Are Not Good For
- Active crisis — use 988 (US), Samaritans 116 123 (UK/IE), 13 11 14 (AU), or 112 (EU)
- Severe presentations (psychosis, severe dissociation, active suicidality)
- Diagnosis (most apps explicitly disclaim diagnostic use)
- Controlled-substance management (requires licensed prescriber + regulatory compliance)
FAQ
Are AI therapy apps effective?
Peer-reviewed trials suggest measurable clinical benefit for some users. The 2025 Dartmouth Therabot RCT (NEJM AI) reported a 51% average reduction in depression symptoms. Wysa and Woebot have demonstrated efficacy in prior randomised trials. AI therapy is best understood as a supplemental tool, not a substitute for professional care, especially in active crisis.
Can AI replace a therapist?
No. AI chatbots can deliver structured exercises (CBT worksheets, mood tracking) reliably. They cannot replace the clinical judgment needed for crisis assessment, severe presentations, individualised treatment planning, or cases requiring medication management.
Is Wysa free?
Wysa has a free tier with the AI chatbot and self-care tools. Premium ($8/month) adds CBT/DBT modules and sleep tools. Premium Plus ($99/month) adds access to a human coach. Wysa is also offered at no cost to consumers through employer and payer programmes in many markets.
Bottom Line
Choose an AI mental-health app based on what you actually need: an AI chatbot for coping skills (Wysa), meditation/sleep (Headspace, Calm), or access to a licensed therapist (BetterHelp, Cerebral — with regulatory-history caveats in each review). None of these tools are appropriate for crises. For clinical evidence, see Is AI therapy safe?.