Limits
| Item | Limit |
|---|---|
| System prompt length | 10,000 characters |
| Property types | string, number, boolean only |
| Knowledge Base file types | .json, .txt, .csv, .pdf, .docx |
| Knowledge Base max file size | 2 MB per file |
| Outbound contact list formats | CSV (comma or semicolon delimited), Excel (.xlsx/.xls), or JSON |
| Outbound phone number format | Must include a country code: + followed by 7–15 digits (e.g. +14155551234) |
| Outbound schedule window | Any date from today up to one month out, in 30-minute increments, in your local timezone |
| Web widget languages (interface) | en, de, pt |
| Web widget themes | light, dark |
| Web widget positions | bottom-right, bottom-left, top-right, top-left |
| New phone numbers | Not self-service — via support |
Available voices and AI models are account-specific and shown live in Create Workflow’s picker — there isn’t a single fixed list that applies to every account.