Builder.io vs Stably AI
Which Coding AI tool is better in 2026?
Builder.io
Visual AI platform: design-to-code, AI app building and an agentic CMS
Stably AI
AI QA engineer that writes and self-heals Playwright tests from plain English
Side-by-side
Builder.io is the more established option (raised $62M), but Stably AI is cheaper to start.
| Metric | Builder.io | Stably AI |
|---|---|---|
| Taglinei | Visual AI platform: design-to-code, AI app building and an agentic CMS | AI QA engineer that writes and self-heals Playwright tests from plain English |
| Foundedi | 2018🏆 | 2022 |
| HQi | San Francisco, United States | San Francisco, United States |
| Employeesi | — | 4🏆 |
| Neuron scorei | 72🏆 | 62 |
| Total fundingi | $62M🏆 | Undisclosed |
| Latest roundi | Series B | — |
| Valuationi | — | — |
| Cheapest paid plani | Pricing not disclosed | From $39/mo🏆 |
| Free plani | ✓ | ✓ |
| Free triali | ✓ | ✓ |
| Top tier pricei | Pricing not disclosed | Pricing not disclosed |
| Pricing summaryi | Free | Free · From $39/mo |
| Categoriesi |
Capability matrix
Developer-facing capabilities and access signals for Builder.io and Stably AI.
| Capability | Builder.io | Stably AI |
|---|---|---|
| MCP support | ✓ | ✗ |
| Public API | ✓ | ✗ |
| Webhooks | ✓ | ✗ |
| OAuth 2.0 | ✓ | ✓ |
| SDK languages | 5 (JavaScript/TypeScript, React, Vue, Angular…) | — |
| Free plan | ✓ | ✓ |
| Free trial | ✓ | ✓ |
| Verified | ✗ | ✗ |
| Active deal | ✗ | ✗ |
🟢 Strengths of Builder.io
- Has raised more capital ($62M vs Undisclosed)
- Higher Neuron score (72 vs 62)
- More mature (2018)
🔵 Strengths of Stably AI
- Lower starting price ($39/mo)
- Newer company (2022)
Which should you choose?
Choose Stably AI if price matters most — it starts at Free · From $39/mo, which is friendlier for teams watching burn. Both AI Coding tools ship core features, so the cost delta often decides it for small teams and solo operators.
Choose Builder.io if you want the most established option — it has raised $62M, 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
Builder.io vs Stably AI — which is better?
It depends on your priority. Builder.io has raised more capital and is the more established option; Stably AI is cheaper to start. See the side-by-side table above.
Is Builder.io cheaper than Stably AI?
No — Stably AI's cheapest paid plan is Free · From $39/mo, while Builder.io's is Free.
Do Builder.io and Stably AI offer free plans?
Builder.io: Yes, has a free plan. Stably AI: Yes, has a free plan.
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