v3.25.2
Cover
Jul. 29, 2025
Cover [Abstract]  
Document Type 8-K
Document Period End Date Jul. 29, 2025
Entity Registrant Name BANDWIDTH INC.
Entity Incorporation, State or Country Code DE
Entity File Number 001-38285
Entity Tax Identification Number 56-2242657
Entity Address, Address Line One 2230 Bandmate Way
Entity Address, City or Town Raleigh
Entity Address, State or Province NC
Entity Address, Postal Zip Code 27607
City Area Code (800)
Local Phone Number 808-5150
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Class A Common Stock, par value $0.001 per share
Trading Symbol BAND
Security Exchange Name NASDAQ
Entity Emerging Growth Company false
Amendment Flag false
Entity Central Index Key 0001514416