RadixArk vs Zyphra
Which Open Source AI AI tool is better in 2026?
RadixArk
Open infrastructure for frontier AI, built on SGLang
Zyphra
Open-science AI lab building efficient multimodal models and the Maia superagent
Side-by-side
Zyphra is the more established option (raised $110M); pricing is comparable on both sides.
| Metric | RadixArk | Zyphra |
|---|---|---|
| Taglinei | Open infrastructure for frontier AI, built on SGLang | Open-science AI lab building efficient multimodal models and the Maia superagent |
| Foundedi | 2025 | 2020🏆 |
| HQi | San Francisco, US | Palo Alto, United States |
| Employeesi | 1-10🏆 | — |
| Neuron scorei | 56 | 75🏆 |
| Total fundingi | $100M | $110M🏆 |
| Latest roundi | Seed · May 2026 | Series A · Jan 2025 |
| Valuationi | $400M | $1B🏆 |
| Cheapest paid plani | Pricing not disclosed | Pricing not disclosed |
| Free plani | ✓ | ✓ |
| Free triali | ✗ | ✗ |
| Top tier pricei | Pricing not disclosed | Pricing not disclosed |
| Pricing summaryi | Open source | Open source |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for RadixArk and Zyphra.
| Capability | RadixArk | Zyphra |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✓ | ✓ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | — | 1 (Python) |
| Free plan | ✓ | ✓ |
| Free trial | ✗ | ✗ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of RadixArk
- Newer company (2025)
🔵 Strengths of Zyphra
- Has raised more capital ($110M vs $100M)
- Higher Neuron score (75 vs 56)
- More mature (2020)
Which should you choose?
Choose Zyphra if price matters most — it starts at Open source, which is friendlier for teams watching burn. Both Open Source AI tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose Zyphra if you want the most established option — it has raised $110M, 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
RadixArk vs Zyphra — which is better?
It depends on your priority. RadixArk is the leaner option; Zyphra has broader feature depth. See the side-by-side table above.
Is RadixArk cheaper than Zyphra?
No — Zyphra's cheapest paid plan is Open source, while RadixArk's is Open source.
Do RadixArk and Zyphra offer free plans?
RadixArk: Yes, has a free plan. Zyphra: Yes, has a free plan.
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