PolyAI vs xAI
Which Agents AI tool is better in 2026?
PolyAI
The world's most lifelike voice AI agents for enterprise customer service.
xAI
AI designed to understand the universe
Side-by-side
xAI is the more established option (raised $56B); pricing is comparable on both sides.
| Metric | PolyAI | xAI |
|---|---|---|
| Taglinei | The world's most lifelike voice AI agents for enterprise customer service. | AI designed to understand the universe |
| Foundedi | 2017🏆 | 2023 |
| HQi | London, GB | Palo Alto, US |
| Employeesi | 201-500 | 500-1000🏆 |
| Neuron scorei | 70 | 90🏆 |
| Total fundingi | $120M | $56B🏆 |
| Latest roundi | Series C · May 2024 | Series E · Jan 2026 |
| Valuationi | — | $230B🏆 |
| Cheapest paid plani | — | Pricing not disclosed |
| Free plani | ✗ | ✗ |
| Free triali | ✓ | ✗ |
| Top tier pricei | Enterprise · Contact sales | Pricing not disclosed |
| Pricing summaryi | 1 published plans | Paid |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for PolyAI and xAI.
| Capability | PolyAI | xAI |
|---|---|---|
| MCP support | ✗ | ✓ |
| Public API | ✗ | ✓ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | 2 (JavaScript, Python) | — |
| Free plan | ✗ | ✗ |
| Free trial | ✓ | ✗ |
| Verified | ✗ | ✓ |
| Active deal | ✗ | ✓ |
🟢 Strengths of PolyAI
- Offers a free trial
- More mature (2017)
🔵 Strengths of xAI
- Has raised more capital ($56B vs $120M)
- Higher Neuron score (90 vs 70)
- Newer company (2023)
- Verified profile
Which should you choose?
Choose xAI if price matters most — it starts at Paid, which is friendlier for teams watching burn. Both AI Agents tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose xAI if you want the most established option — it has raised $56B, 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.
💸 Deals
xAI Grok API — free tier on signup
xAI offers a free tier for the Grok API so developers can prototype with Grok-4 and Grok-Code before adding billing.
Terms: Rate-limited.
Frequently asked questions
PolyAI vs xAI — which is better?
It depends on your priority. PolyAI is the leaner option; xAI has broader feature depth. See the side-by-side table above.
Is PolyAI cheaper than xAI?
No — xAI's cheapest paid plan is Paid, while PolyAI's is Enterprise · Contact sales.
Do PolyAI and xAI offer free plans?
PolyAI: Free trial only. xAI: Paid only.
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