Lemma vs VAST Data
Which Infrastructure AI tool is better in 2026?
Lemma
Reliability platform that catches AI agent regressions and auto-optimizes prompts in production.
VAST Data
Unifying software layer for AI infrastructure
Side-by-side
VAST Data is the more established option (raised $2.4B); pricing is comparable on both sides.
| Metric | Lemma | VAST Data |
|---|---|---|
| Taglinei | Reliability platform that catches AI agent regressions and auto-optimizes prompts in production. | Unifying software layer for AI infrastructure |
| Foundedi | 2025 | 2016🏆 |
| HQi | San Francisco, US | US |
| Employeesi | — | 201-500🏆 |
| Neuron scorei | 55 | 90🏆 |
| Total fundingi | $500K | $2.4B🏆 |
| Latest roundi | Seed · Sep 2025 | Series F · Apr 2026 |
| Valuationi | — | $30B🏆 |
| Cheapest paid plani | Pricing not disclosed | — |
| Free plani | ✗ | ✗ |
| Free triali | ✓ | ✗ |
| Top tier pricei | Pricing not disclosed | Enterprise · Contact sales |
| Pricing summaryi | Free trial | 1 published plans |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Lemma and VAST Data.
| Capability | Lemma | VAST Data |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✗ | ✗ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | — |
| Free plan | ✗ | ✗ |
| Free trial | ✓ | ✗ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Lemma
- Offers a free trial
- Newer company (2025)
🔵 Strengths of VAST Data
- Has raised more capital ($2.4B vs $500K)
- Higher Neuron score (90 vs 55)
- More mature (2016)
Which should you choose?
Choose VAST Data if price matters most — it starts at Enterprise · Contact sales, which is friendlier for teams watching burn. Both AI Infrastructure tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose VAST Data if you want the most established option — it has raised $2.4B, 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
Lemma vs VAST Data — which is better?
It depends on your priority. Lemma is the leaner option; VAST Data has broader feature depth. See the side-by-side table above.
Is Lemma cheaper than VAST Data?
No — VAST Data's cheapest paid plan is Enterprise · Contact sales, while Lemma's is Free trial.
Do Lemma and VAST Data offer free plans?
Lemma: Free trial only. VAST Data: Paid only.
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