21st Agents SDK vs Devin vs Paddle vs PayPal
| Attribute | ||||
|---|---|---|---|---|
| Category | Developer Tools | AI Coding Assistants | Finance & Accounting | Finance & Accounting |
| Pricing | Paid | Paid | Paid | Usage-based |
| Starting price | $6/month | $20/month | $5/month | — |
| Free tier | No | No | No | No |
| Free trial | No | Yes | No | No |
| Deployment | — | Cloud | — | — |
| API available | Unknown | Unknown | Unknown | Unknown |
| Platforms | — | — | — | — |
| Certifications | — | — | — | — |
| Integrations | 1 | — | — | 1 |
| Company | — | — | — | Founded 1998 |
| Feature attributes | ||||
Also consider
Unknown values show as “Unknown”/“—”. Nothing is inferred — see each tool page for sources.