Exhibit 21.1

SUBSIDIARIES OF THE REGISTRANT

Ajax Illinois Corp. (Delaware)

Confio Corporation (Delaware)

Galaxy Technologies, LLC (Delaware)

IASO International, B.V. (Netherlands)

Librato, Inc. (Delaware)

LLC SolarWinds MSP Technology (Belarus)

Loggly, Inc. (Delaware)

LogicNow Acquisition Company B.V. (Netherlands)

LogicNow Acquisition Limited (United Kingdom)

LogicNow Pty Ltd (Australia)

N-able Technologies International, Inc. (Delaware)

Papertrail Inc. (Delaware)

Pingdom AB (Sweden)

Project Lake Holdings Limited (United Kingdom)

Protected Networks GmbH (Germany)

Rhino Software, Inc. (Wisconsin)

SAManage Ltd. (Israel)

SAManage USA, Inc. (Delaware)

SAManage Europe B.V. (Netherlands)

SAManage UK Ltd (UK)

SolarWinds Canada Corporation (Nova Scotia)

SolarWinds Classic Holdings I, Inc. (Delaware)

SolarWinds Classic Holdings II, Inc. (Delaware)

SolarWinds Czech s.r.o. (Czech Republic)

SolarWinds Holdings, Inc. (Delaware)

SolarWinds Intermediate Holdings I, Inc. (Delaware)

SolarWinds Intermediate Holdings II, Inc. (Delaware)

SolarWinds International Holdings, Ltd. (Cayman Islands)

SolarWinds IP Holding Company Limited (Ireland)

SolarWinds Japan K.K. (Japan)

SolarWinds MSP Canada ULC (British Columbia)

SolarWinds MSP Cloud GmbH (Switzerland)

SolarWinds MSP Holdings Limited (United Kingdom)

SolarWinds MSP Holdings Worldwide, Ltd. (Cayman Islands)

SolarWinds MSP International B.V. (Netherlands)

SolarWinds MSP Technology B.V. (Netherlands)

SolarWinds MSP UK Limited (United Kingdom)

SolarWinds MSP US, Inc. (Delaware)

SolarWinds North America, Inc. (Delaware)

SolarWinds Poland Sp. z o.o. (Poland)

SolarWinds Software Asia Pte. Ltd. (Singapore)

SolarWinds Software Australia Pty. Ltd. (Australia)

SolarWinds Software Europe (Holdings) Limited (Ireland)

SolarWinds Software Europe Limited (Ireland)

SolarWinds Software Netherlands B.V. (Netherlands)

SolarWinds Software Portugal, Unipessoal Lda. (Portugal)

SolarWinds Software UK, Ltd. (United Kingdom)

SolarWinds Sweden Holdings AB (Sweden)

SolarWinds Worldwide, LLC (Delaware)

SpamExperts B.V. (Netherlands)

SpamExperts Services Srl. (Romania)

Trusted Metrics, Inc. (Delaware)