<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019eb258-4bd0-7420-926f-59af3e9b683e,g:8cbee244-be86-46f1-bfeb-8e653b39ddcb-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.bandwidth.com/role/Cover" xlink:type="simple" xlink:href="band-20260615.xsd#Cover"/>
  <link:presentationLink xlink:role="http://www.bandwidth.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_CoverAbstract_019eb258-4bd0-7005-995a-3b88c1ad2d43" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CoverAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019eb258-4bd0-77f2-92bc-c56f34fa8e04" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentType"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb258-4bd0-7005-995a-3b88c1ad2d43" xlink:to="loc_dei_DocumentType_019eb258-4bd0-77f2-92bc-c56f34fa8e04" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019eb258-4bd0-7f13-9849-d2c195b2d7f1" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentPeriodEndDate"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb258-4bd0-7005-995a-3b88c1ad2d43" xlink:to="loc_dei_DocumentPeriodEndDate_019eb258-4bd0-7f13-9849-d2c195b2d7f1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019eb258-4bd0-7b71-b817-560a3f3955ac" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityRegistrantName"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb258-4bd0-7005-995a-3b88c1ad2d43" xlink:to="loc_dei_EntityRegistrantName_019eb258-4bd0-7b71-b817-560a3f3955ac" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019eb258-4bd0-713f-9689-34bd5b12e18d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb258-4bd0-7005-995a-3b88c1ad2d43" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019eb258-4bd0-713f-9689-34bd5b12e18d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019eb258-4bd0-788f-b68a-2948b5845167" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFileNumber"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb258-4bd0-7005-995a-3b88c1ad2d43" xlink:to="loc_dei_EntityFileNumber_019eb258-4bd0-788f-b68a-2948b5845167" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019eb258-4bd0-7b0b-a957-4b13ace970c4" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb258-4bd0-7005-995a-3b88c1ad2d43" xlink:to="loc_dei_EntityTaxIdentificationNumber_019eb258-4bd0-7b0b-a957-4b13ace970c4" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019eb258-4bd0-7376-977f-2121aa5a6063" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine1"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb258-4bd0-7005-995a-3b88c1ad2d43" xlink:to="loc_dei_EntityAddressAddressLine1_019eb258-4bd0-7376-977f-2121aa5a6063" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019eb258-4bd0-7318-9ee4-af4297ff52c6" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressCityOrTown"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb258-4bd0-7005-995a-3b88c1ad2d43" xlink:to="loc_dei_EntityAddressCityOrTown_019eb258-4bd0-7318-9ee4-af4297ff52c6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019eb258-4bd0-7fc7-afd9-361208ef97dd" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressStateOrProvince"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb258-4bd0-7005-995a-3b88c1ad2d43" xlink:to="loc_dei_EntityAddressStateOrProvince_019eb258-4bd0-7fc7-afd9-361208ef97dd" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019eb258-4bd0-7259-88a0-3112aa6919f6" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressPostalZipCode"/>
    <link:presentationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb258-4bd0-7005-995a-3b88c1ad2d43" xlink:to="loc_dei_EntityAddressPostalZipCode_019eb258-4bd0-7259-88a0-3112aa6919f6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019eb258-4bd0-7d98-9acb-a3f960cdab8f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CityAreaCode"/>
    <link:presentationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb258-4bd0-7005-995a-3b88c1ad2d43" xlink:to="loc_dei_CityAreaCode_019eb258-4bd0-7d98-9acb-a3f960cdab8f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019eb258-4bd0-7785-a303-d63971ce3c20" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LocalPhoneNumber"/>
    <link:presentationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb258-4bd0-7005-995a-3b88c1ad2d43" xlink:to="loc_dei_LocalPhoneNumber_019eb258-4bd0-7785-a303-d63971ce3c20" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_019eb258-4bd0-7317-b9c3-ca0d932ce094" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_WrittenCommunications"/>
    <link:presentationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb258-4bd0-7005-995a-3b88c1ad2d43" xlink:to="loc_dei_WrittenCommunications_019eb258-4bd0-7317-b9c3-ca0d932ce094" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_019eb258-4bd0-76dd-aaab-d91225e42282" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SolicitingMaterial"/>
    <link:presentationArc order="14" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb258-4bd0-7005-995a-3b88c1ad2d43" xlink:to="loc_dei_SolicitingMaterial_019eb258-4bd0-76dd-aaab-d91225e42282" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_019eb258-4bd0-7371-9408-0b09fde80cd5" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_PreCommencementTenderOffer"/>
    <link:presentationArc order="15" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb258-4bd0-7005-995a-3b88c1ad2d43" xlink:to="loc_dei_PreCommencementTenderOffer_019eb258-4bd0-7371-9408-0b09fde80cd5" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_019eb258-4bd0-7cf7-8a4d-57157c1d613e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:presentationArc order="16" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb258-4bd0-7005-995a-3b88c1ad2d43" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_019eb258-4bd0-7cf7-8a4d-57157c1d613e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019eb258-4bd0-7e05-94cb-3747e5547947" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_Security12bTitle"/>
    <link:presentationArc order="17" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb258-4bd0-7005-995a-3b88c1ad2d43" xlink:to="loc_dei_Security12bTitle_019eb258-4bd0-7e05-94cb-3747e5547947" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019eb258-4bd0-7125-aba1-026ea33b3850" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_TradingSymbol"/>
    <link:presentationArc order="18" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb258-4bd0-7005-995a-3b88c1ad2d43" xlink:to="loc_dei_TradingSymbol_019eb258-4bd0-7125-aba1-026ea33b3850" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019eb258-4bd0-7dd7-84ff-f3fd8dd50d3d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SecurityExchangeName"/>
    <link:presentationArc order="19" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb258-4bd0-7005-995a-3b88c1ad2d43" xlink:to="loc_dei_SecurityExchangeName_019eb258-4bd0-7dd7-84ff-f3fd8dd50d3d" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019eb258-4bd0-7a69-bb28-abdd8feb23ea" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:presentationArc order="20" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb258-4bd0-7005-995a-3b88c1ad2d43" xlink:to="loc_dei_EntityEmergingGrowthCompany_019eb258-4bd0-7a69-bb28-abdd8feb23ea" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019eb258-4bd0-77f2-a98f-56bf17f98e62" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_AmendmentFlag"/>
    <link:presentationArc order="21" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb258-4bd0-7005-995a-3b88c1ad2d43" xlink:to="loc_dei_AmendmentFlag_019eb258-4bd0-77f2-a98f-56bf17f98e62" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019eb258-4bd0-72d7-9e26-0e62a5bd81b9" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCentralIndexKey"/>
    <link:presentationArc order="22" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019eb258-4bd0-7005-995a-3b88c1ad2d43" xlink:to="loc_dei_EntityCentralIndexKey_019eb258-4bd0-72d7-9e26-0e62a5bd81b9" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
</link:linkbase>
