Slingshot AI vs Spirit AI
Which Foundation Models AI tool is better in 2026?
Slingshot AI
Foundation model and AI app for mental health
Spirit AI
Embodied-intelligence foundation models for general-purpose humanoid robots
Side-by-side
Spirit AI is the more established option (raised $435M), but Slingshot AI is cheaper to start.
| Metric | Slingshot AI | Spirit AI |
|---|---|---|
| Taglinei | Foundation model and AI app for mental health | Embodied-intelligence foundation models for general-purpose humanoid robots |
| Foundedi | 2023🏆 | 2024 |
| HQi | New York, US | Beijing, CN |
| Employeesi | 51-100 | 51-200🏆 |
| Neuron scorei | 80🏆 | 67 |
| Total fundingi | $93M | $435M🏆 |
| Latest roundi | Series A Extension · Jul 2025 | Series A extension · Apr 2026 |
| Valuationi | — | $1.4B🏆 |
| 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 |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Slingshot AI and Spirit AI.
| Capability | Slingshot AI | Spirit AI |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✗ | ✗ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | — |
| Free plan | ✗ | ✓ |
| Free trial | ✗ | ✓ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Slingshot AI
- Higher Neuron score (80 vs 67)
- More mature (2023)
🔵 Strengths of Spirit AI
- Has raised more capital ($435M vs $93M)
- Offers a free plan
- Offers a free trial
- Newer company (2024)
Which should you choose?
Choose Slingshot AI if price matters most — it starts at Freemium, which is friendlier for teams watching burn. Both Foundation Models tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose Spirit AI if you want the most established option — it has raised $435M, 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 Spirit AI — which is better?
It depends on your priority. Slingshot AI is the leaner option; Spirit AI has broader feature depth. See the side-by-side table above.
Is Slingshot AI cheaper than Spirit AI?
Yes — Slingshot AI's cheapest paid plan is Freemium, while Spirit AI's is Free.
Do Slingshot AI and Spirit AI offer free plans?
Slingshot AI: Paid only. Spirit AI: Yes, has a free plan.
Explore more Foundation Models tools
Contextual paths to related AI startups, deals and rankings.