Document and Entity Information - shares
3 Months Ended
Apr. 30, 2019
May 31, 2019
Document and Entity Information [Abstract]    
Entity Registrant Name PagerDuty, Inc.  
Entity Central Index Key 0001568100  
Current Fiscal Year End Date --01-31  
Entity Filer Category Non-accelerated Filer  
Document Type 10-Q  
Document Period End Date Apr. 30, 2019  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Small Business false  
Entity Common Stock, Shares Outstanding   76,086,024