Cover |
Aug. 13, 2025 |
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| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Aug. 13, 2025 |
| Entity Registrant Name | Klaviyo, Inc. |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 001-41806 |
| Entity Tax Identification Number | 46-0989964 |
| Entity Address, Address Line One | 125 Summer Street |
| Entity Address, Address Line Two | 6th Floor |
| Entity Address, City or Town | Boston |
| Entity Address, State or Province | MA |
| Entity Address, Postal Zip Code | 02110 |
| City Area Code | 617 |
| Local Phone Number | 213-1788 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Series A common stock, par value $0.001 per share |
| Trading Symbol | KVYO |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Entity Central Index Key | 0001835830 |
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- Definition For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD. No definition available.
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- Definition Two-character EDGAR code representing the state or country of incorporation. No definition available.
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- Definition The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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