Slingshot AI vs Sonia
Which Chatbots AI tool is better in 2026?
Slingshot AI
Foundation model and AI app for mental health
Sonia
A voice-based AI therapist in your pocket, built by MIT and ETH AI researchers
Side-by-side
Slingshot AI leads on both fronts — more capital raised ($93M) and a lower entry price than Sonia.
| Metric | Slingshot AI | Sonia |
|---|---|---|
| Taglinei | Foundation model and AI app for mental health | A voice-based AI therapist in your pocket, built by MIT and ETH AI researchers |
| Foundedi | 2023 | 2023 |
| HQi | New York, US | New York, United States |
| Employeesi | 51-100🏆 | — |
| Neuron scorei | 80🏆 | 65 |
| Total fundingi | $93M🏆 | $3.4M |
| Latest roundi | Series A Extension · Jul 2025 | Seed |
| Valuationi | —🏆 | — |
| Cheapest paid plani | Pricing not disclosed🏆 | Pricing not disclosed |
| Free plani | ✗ | ✗ |
| Free triali | ✗ | ✓ |
| Top tier pricei | Pricing not disclosed | Pricing not disclosed |
| Pricing summaryi | Freemium | Free trial |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Slingshot AI and Sonia.
| Capability | Slingshot AI | Sonia |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✗ | ✗ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | — |
| Free plan | ✗ | ✗ |
| Free trial | ✗ | ✓ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Slingshot AI
- Has raised more capital ($93M vs $3.4M)
- Higher Neuron score (80 vs 65)
🔵 Strengths of Sonia
- Offers a free trial
Which should you choose?
Choose Slingshot AI if price matters most — it starts at Freemium, which is friendlier for teams watching burn. Both AI Chatbots tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose Slingshot AI if you want the most established option — it has raised $93M, suggesting more runway for enterprise features, support, and long-term roadmap. For mission-critical workflows or larger teams, that stability often outweighs a lower monthly price.
Frequently asked questions
Slingshot AI vs Sonia — which is better?
It depends on your priority. Slingshot AI has raised more capital and is the more established option; Sonia has broader feature depth. See the side-by-side table above.
Is Slingshot AI cheaper than Sonia?
Yes — Slingshot AI's cheapest paid plan is Freemium, while Sonia's is Free trial.
Do Slingshot AI and Sonia offer free plans?
Slingshot AI: Paid only. Sonia: Free trial only.
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