OpenAI vs Retell AI
Which Chatbots AI tool is better in 2026?
OpenAI
Creator of ChatGPT, GPT-4, and the leading frontier AI lab.
Retell AI
Hire your AI call center for sales, support, and appointment scheduling
Side-by-side
| OpenAI | Retell AI | |
|---|---|---|
| Tagline | Creator of ChatGPT, GPT-4, and the leading frontier AI lab. | Hire your AI call center for sales, support, and appointment scheduling |
| Founded | 2015 | — |
| HQ | San Francisco, US | US |
| Employees | 1001-5000 | 1-10 |
| Total funding | $193.3B | Undisclosed |
| Latest round | series-e · Mar 2026 | seed |
| Valuation | $852B | — |
| Cheapest paid plan | Go · $8/mo | — |
| Free plan | ✓ Free | ✓ Pay as you go |
| Free trial | ✗ | ✓ |
| Top tier price | Pro · $200/mo | Enterprise Plan · Contact sales |
| Pricing summary | 6 published plans | 2 published plans |
| Categories |
Capability matrix
Developer-facing capabilities and access signals for OpenAI and Retell AI.
| Capability | OpenAI | Retell AI |
|---|---|---|
| MCP support | ✗ | ✗ |
| Public API | ✗ | ✗ |
| Webhooks | ✗ | ✗ |
| OAuth 2.0 | ✗ | ✗ |
| SDK languages | 6 (Python, Node.js, TypeScript, Go…) | — |
| Free plan | ✓ | ✓ |
| Free trial | ✗ | ✓ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of OpenAI
- Has raised more capital ($193.3B vs Undisclosed)
- Higher Neuron score (80 vs 19)
- Offers a free plan
- Lower starting price ($20/mo)
🔵 Strengths of Retell AI
- Offers a free trial
Which should you choose?
Choose OpenAI if price matters most — it starts at Free · From $20/mo, which is friendlier for teams watching burn. Both AI Chatbots tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose OpenAI if you want the most established option — it has raised $193.3B, 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
OpenAI vs Retell AI — which is better?
It depends on your priority. OpenAI has raised more capital and is the more established option; Retell AI has broader feature depth. See the side-by-side table above.
Is OpenAI cheaper than Retell AI?
Yes — OpenAI's cheapest paid plan is Go · $8/mo, while Retell AI's is Free.
Do OpenAI and Retell AI offer free plans?
OpenAI: Yes, has a free plan. Retell AI: Yes, has a free plan.
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