123FormBuilder vs Build Check (for Outsiders) vs Optimal Workshop vs VWO
| Attribute | ||||
|---|---|---|---|---|
| Category | Forms & Surveys | Forms & Surveys | Research & Science | Marketing |
| Pricing | Free tier | Free tier | Paid | Free tier |
| Starting price | — | Free | $199/month | $299/month |
| Free tier | Yes | Yes | No | Yes |
| Free trial | No | Unknown | No | Yes |
| Deployment | — | — | — | Cloud |
| API available | Unknown | Unknown | Unknown | Unknown |
| Platforms | — | — | — | — |
| Certifications | — | — | — | — |
| Integrations | 11 | — | 1 | — |
| Company | — | — | — | — |
| Feature attributes | ||||
Also consider
Unknown values show as “Unknown”/“—”. Nothing is inferred — see each tool page for sources.