21st Agents SDK vs Copy.ai vs LangChain vs Prime Intellect
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| Attribute | ||||
|---|---|---|---|---|
| Category | Developer Tools | Content & Writing | AI Agents & Assistants | AI Agents & Assistants |
| Pricing | Paid | Freemium | Free tier | Paid |
| Starting price | $6/month | $24 | $39/month | $1.99/month |
| Free tier | No | No | Yes | No |
| Free trial | No | Yes | No | No |
| Deployment | — | — | — | — |
| API available | Unknown | Yes | Unknown | Unknown |
| Platforms | — | — | — | — |
| Certifications | — | 1 | — | — |
| Integrations | 1 | — | — | — |
| Company | — | Founded 2020 | — | — |
| Feature attributes | ||||
| Sso Saml | — Unknown | ✓ Yes | — Unknown | — Unknown |
| Rbac | — Unknown | — Unknown | — Unknown | — Unknown |
| Mobile App | — Unknown | — Unknown | — Unknown | — Unknown |
| Webhooks | — Unknown | — Unknown | — Unknown | — Unknown |
| Data Export | — Unknown | — Unknown | — Unknown | — Unknown |
| Ai Generation | — Unknown | — Unknown | — Unknown | — Unknown |
| Grammar Check | — Unknown | — Unknown | — Unknown | — Unknown |
| Plagiarism Check | — Unknown | — Unknown | — Unknown | — Unknown |
| Brand Voice | — Unknown | ✓ Yes | — Unknown | — Unknown |
| Browser Extension | — Unknown | — Unknown | — Unknown | — Unknown |
Also consider
Unknown values show as “Unknown”/“—”. Nothing is inferred — see each tool page for sources.