| Cover | Mar. 17, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Mar. 17, 2021 |
| Entity Registrant Name | PagerDuty, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-38856 |
| Entity Tax Identification Number | 27-2793871 |
| Entity Address, Address Line One | 600 Townsend St. |
| Entity Address, Address Line Two | Suite 200 |
| Entity Address, City or Town | San Francisco |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 94103 |
| City Area Code | 844 |
| Local Phone Number | 800-3889 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $0.000005 par value |
| Trading Symbol | PD |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Entity Central Index Key | 0001568100 |
