21st Agents SDK vs Bubble vs Character.AI vs Convai
| Attribute | ||||
|---|---|---|---|---|
| Category | Developer Tools | No-Code & Low-Code | AI Agents & Assistants | AI Agents & Assistants |
| Pricing | Paid | Free tier | Free tier | Free tier |
| Starting price | $6/month | $32 | $9.99/month | $5/month |
| Free tier | No | Yes | Yes | Yes |
| Free trial | No | No | No | Yes |
| Deployment | — | Cloud | — | — |
| API available | Unknown | Unknown | Unknown | Unknown |
| Platforms | — | — | — | — |
| Certifications | — | 2 | — | — |
| Integrations | 1 | — | — | — |
| Company | — | Founded 2012 | Founded 2022 | — |
| 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 |
| Visual Builder | — Unknown | ✓ Yes | — Unknown | — Unknown |
| Database Included | — Unknown | ✓ Yes | — Unknown | — Unknown |
| Custom Code Support | — Unknown | — Unknown | — Unknown | — Unknown |
| Self Hosting | — Unknown | — Unknown | — Unknown | — Unknown |
| Workflow Automation | — Unknown | — Unknown | — Unknown | — Unknown |
Also consider
Unknown values show as “Unknown”/“—”. Nothing is inferred — see each tool page for sources.