Your employer cannot see your answers, Effectory does not disclose personal data under any circumstances.
Please note: the answers to the open questions of the survey, while being anonymous, are included verbatim in the report. Your manager has access to the report so can read exactly what you have written.
Your employer can also see the response rate of the survey group. After the closing date of the survey a total report is generated at group level. This result consists of the combined answers of the participants who filled in the questionnaire within one survey group.