Retell AI vs xAI
Which Agents AI tool is better in 2026?
Retell AI
Hire your AI call center for sales, support, and appointment scheduling
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 | Retell AI | xAI |
|---|---|---|
| Taglinei | Hire your AI call center for sales, support, and appointment scheduling | AI designed to understand the universe |
| Foundedi | 2023 | 2023 |
| HQi | US | Palo Alto, US |
| Employeesi | 1-10 | 500-1000🏆 |
| Neuron scorei | 60 | 90🏆 |
| Total fundingi | Undisclosed | $56B🏆 |
| Latest roundi | Seed | Series E · Jan 2026 |
| Valuationi | — | $230B🏆 |
| Cheapest paid plani | — | Pricing not disclosed |
| Free plani | ✓ Free Trial | ✗ |
| Free triali | ✓ | ✗ |
| Top tier pricei | Enterprise · Contact sales | Pricing not disclosed |
| Pricing summaryi | 2 published plans | Paid |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Retell AI and xAI.
| Capability | Retell AI | xAI |
|---|---|---|
| MCP support | ✗ | ✓ |
| Public API | ✗ | ✓ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | 2 (JavaScript, Python) | — |
| Free plan | ✓ | ✗ |
| Free trial | ✓ | ✗ |
| Verified | ✗ | ✓ |
| Active deal | ✗ | ✓ |
🟢 Strengths of Retell AI
- Offers a free plan
- Offers a free trial
🔵 Strengths of xAI
- Has raised more capital ($56B vs Undisclosed)
- Higher Neuron score (90 vs 60)
- 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
Retell AI vs xAI — which is better?
It depends on your priority. Retell AI is the leaner option; xAI has broader feature depth. See the side-by-side table above.
Is Retell AI cheaper than xAI?
No — xAI's cheapest paid plan is Paid, while Retell AI's is Free.
Do Retell AI and xAI offer free plans?
Retell AI: Yes, has a free plan. xAI: Paid only.
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