Onyx vs Thesis
Which Search AI tool is better in 2026?
Onyx
Thesis
Automate AI research
Side-by-side
Onyx is the more established option (raised $10M); pricing is comparable on both sides.
| Metric | Onyx | Thesis |
|---|---|---|
| Taglinei | — | Automate AI research |
| Foundedi | — | 2025🏆 |
| HQi | — | San Francisco, US |
| Employeesi | 11-50🏆 | 1-10 |
| Neuron scorei | 72🏆 | 44 |
| Total fundingi | $10M🏆 | $500K |
| Latest roundi | Seed | Seed · Jan 2025 |
| 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 | Free | Pricing not listed |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Onyx and Thesis.
| Capability | Onyx | Thesis |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✗ | ✗ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | — |
| Free plan | ✓ | ✗ |
| Free trial | ✓ | ✗ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Onyx
- Has raised more capital ($10M vs $500K)
- Higher Neuron score (72 vs 44)
- Offers a free plan
- Offers a free trial
🔵 Strengths of Thesis
- Newer company (2025)
Which should you choose?
Choose Thesis if price matters most — it starts at Pricing not listed, which is friendlier for teams watching burn. Both AI Search tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose Onyx if you want the most established option — it has raised $10M, 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
Onyx vs Thesis — which is better?
It depends on your priority. Onyx has raised more capital and is the more established option; Thesis has broader feature depth. See the side-by-side table above.
Is Onyx cheaper than Thesis?
No — Thesis's cheapest paid plan is Pricing not listed, while Onyx's is Free.
Do Onyx and Thesis offer free plans?
Onyx: Yes, has a free plan. Thesis: Paid only.
Explore more AI Search tools
Contextual paths to related AI startups, deals and rankings.