List of acquisitions by Cisco
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Cisco Systems, Inc., commonly known as Cisco, is an American computer networking company. Cisco made its first acquisition in 1993,[1] which was followed by a series of further acquisitions.

Founded in 1984, Cisco did not acquire a company during the first seven years of its existence; but, on September 24, 1993, Cisco acquired Crescendo Communications, a LAN switching company.[2] Following the first Cisco takeover purchase, acquisitions have constituted 50 percent of the company's business activity.[2]

The company's largest acquisition as of October 2023 is the purchase of Splunk—a software company that develops software for the analysis and monitoring of machine-generated data—US$28 billion.[3] Cisco's previous largest acquisition was tied between Cerent Corporation and Scientific Atlanta for $6.9 billion in 1999 and 2005 respectively.[4][5]

The majority of companies acquired by Cisco are based in the United States (U.S.) and a total of 149 companies have been acquired as of March 2011 .[6] Most of the companies acquired by Cisco are related to computer networking, with several LAN switching and Voice over Internet Protocol (VoIP) companies included in the list of acquisitions.[6]

Each acquisition is for the respective company in its entirety, unless otherwise specified, and the date of the agreement between Cisco Systems and the subject of the acquisition is listed. The value of each acquisition is listed in the US$ currency because Cisco Systems is headquartered in California, U.S.

The majority of its products and business units have come from acquisitions, with Cisco Systems spending more than $70 billion to acquire approximately 218 organizations as of October 2021.

Date Company Business Country Value (USD) References September 24, 1993 Crescendo Communications LAN switching United States $94,500,000 [7] July 12, 1994 Newport Systems Solutions Router United States $95,000,000 [8][9][10] October 24, 1994 Kalpana LAN switching United States $204,000,000 [11] December 8, 1994 LightStream ATM switching United States $120,000,000 [12] August 10, 1995 Combinet Remote office routers United States $114,200,000 [13] September 6, 1995 Internet Junction Gateway United States $5,500,000 [14] September 27, 1995 Grand Junction Networks 100Mbps Ethernet LAN Switching United States $348,000,000 October 27, 1995 Network Translation Firewalls United States $30,000,000 [15][16] November 6, 1995 Grand Junction Networks LAN switching United States $345,000,000 [17][18][19] January 23, 1996 TGV Software Internet software company United States $115,000,000 [20][21]

Updated on ClearOS' web page: ClearOS Pedigree[22] April 22, 1996 StrataCom ATM switching United States $ 4,000,000,000 [23][24] July 22, 1996 Telebit Modems United States $200,000,000 [25][26] August 6, 1996 Nashoba Networks LAN switching United States $100,000,000 [27][28] September 3, 1996 Granite Systems Computer networking United States $220,000,000 [29][30] October 14, 1996 Netsys Technologies Network simulation United States $79,000,000 [31][32] December 1996 Metaplex Computer networking Australia — [33] March 26, 1997 Telesend Broadband Internet access United States — [34][35] June 9, 1997 Skystone Systems Synchronous optical networking Canada $89,100,000 [36][37] June 24, 1997 Global Internet Software Group Firewall United States $40,250,000 [38] June 24, 1997 Ardent Communications Broadband Internet access United States $156,000,000 [39] September 2, 1997 Integrated Network Digital subscriber line United States — [40] December 22, 1997 LightSpeed International Voice over Internet Protocol United States $160,000,000 [41] February 18, 1998 WheelGroup Computer security United States $124,000,000 [42][43] March 10, 1998 NetSpeed Broadband Internet access United States $236,000,000 [44] March 11, 1998 Precept Software Internet television United States $84,000,000 [45] May 4, 1998 CLASS Data Systems Computer networking United States $50,000,000 [46] July 28, 1998 Summa Four LAN switching United States $116,000,000 [47] August 21, 1998 American Internet Computer networking United States $56,000,000 [48] September 15, 1998 Clarity Wireless Wireless networking United States $157,000,000 [49] October 14, 1998 Selsius Systems Voice over Internet Protocol United States $145,000,000 [50] December 2, 1998 Pipelinks Synchronous optical networking United States $126,000,000 [51] April 8, 1999 Fibex Systems Digital loop carrier United States $250,000,000 [52][53] April 8, 1999 Sentient Networks Voice over Internet Protocol United States $195,000,000 [52] April 13, 1999 GeoTel Communications Voice over Internet Protocol United States $ 2,000,000,000 [5] April 28, 1999 Amteva Technologies Voice over Internet Protocol United States $170,000,000 [5] June 17, 1999 TransMedia Communications Gateways United States $407,000,000 [5] June 29, 1999 StratumOne Communications Synchronous optical networking United States $435,000,000 [5] August 16, 1999 Calista Private branch exchange United States $55,000,000 [5] August 18, 1999 MaxComm Technologies Voice over Internet Protocol United States $143,000,000 [5] August 26, 1999 Monterey Networks Synchronous optical networking United States $500,000,000 [5] August 26, 1999 Cerent Synchronous optical networking United States $ 6,900,000,000 [5] August 31, 1999 IBM Networking Hardware Division Computer networking United States $ 2,000,000,000 [54] September 15, 1999 COCOM A/S Cable modems Denmark $65,600,000 [5] September 22, 1999 Webline Communications Contact management United States $325,000,000 [55] October 26, 1999 Tasmania Network Systems Web cache United States $25,000,000 [5] November 9, 1999 Aironet Wireless Communications Wireless LAN United States $799,000,000 [5] November 11, 1999 V-Bits Digital video United States $128,000,000 [5] December 16, 1999 Worldwide Data Systems Information technology consulting United States $25,500,000 [5] December 17, 1999 Internet Engineering Group (IEng) High performance routing software United States $25,000,000 [56] December 20, 1999 Pirelli Optical Systems Fiber-optic communication Italy $ 2,150,000,000 [57] January 19, 2000 Compatible Systems Virtual private networking United States $317,000,000 [58][59] January 19, 2000 Altiga Networks Virtual private networking United States $250,000,000 [58][59] February 16, 2000 Growth Networks Chipsets United States $355,000,000 [60] March 1, 2000 Atlantech Technologies Network management United Kingdom $180,000,000 [61] March 16, 2000 JetCell Mobile telephones United States $200,000,000 [62] March 16, 2000 infoGear Technology Information management United States $301,000,000 [63] March 29, 2000 SightPath Content delivery United States $800,000,000 [64] April 11, 2000 PentaCom LAN switching Israel $118,000,000 [65] April 12, 2000 Seagull Semiconductor Computer networking Israel $19,000,000 [66] May 5, 2000 Arrowpoint Communications LAN switching United States $ 5,700,000,000 [67] May 12, 2000 Qeyton Systems Wavelength-division multiplexing Sweden $800,000,000 [68] June 5, 2000 HyNEX Internet access Israel $127,000,000 [69] July 7, 2000 Netiverse LAN switching United States $210,000,000 [70] 2001 AuroraNetics Computer networking United States $150,000,000 [71] July 25, 2000 Komodo Technology Voice over Internet Protocol United States $175,000,000 [72] July 27, 2000 NuSpeed Internet Systems iSCSI United States $450,000,000 [73] August 1, 2000 IPmobile Mobile software United States $425,000,000 [74] August 31, 2000 PixStream Media player (application software) United States $369,000,000 [75] September 28, 2000 IPCell Technologies Voice over Internet Protocol United States $200,000,000 [76] September 28, 2000 Vovida Networks Voice over Internet Protocol United States $169,000,000 [76] October 20, 2000 CAIS Software Integrated development environment United States $170,000,000 [77] November 10, 2000 Active Voice Communication software United States $266,000,000 [78] November 13, 2000 Radiata Wireless networking Australia $295,000,000 [79] December 14, 2000 ExiO Communications Wireless networking United States $155,000,000 [80] July 27, 2001 Allegro Systems Virtual private networks United States $181,000,000 [81] May 1, 2002 Hammerhead Networks Computer networking United States $173,000,000 [82] May 1, 2002 Navarro Networks Computer networking United States $85,000,000 [82] July 25, 2002 AYR Networks Computer networking United States $113,000,000 [83] August 20, 2002 Andiamo Systems Data storage United States $ 2,500,000,000 [84] October 22, 2002 Psionic Software Intrusion detection United States $12,000,000 [85] January 24, 2003 Okena Intrusion detection United States $154,000,000 [86] March 19, 2003 SignalWorks Echo cancellation United States $13,500,000 [87] March 20, 2003 Linksys Computer networking United States $500,000,000 [88] November 12, 2003 Latitude Communications Web conferencing United States $80,000,000 [89] March 12, 2004 Twingo Systems Computer security United States $5,000,000 [90] March 22, 2004 Riverhead Networks Computer security United States $39,000,000 [91] June 17, 2004 Procket Networks Routers United States $89,000,000 [92] June 29, 2004 Actona Technologies Data storage United States $82,000,000 [93] July 8, 2004 Parc Technologies Routers United Kingdom $9,000,000 [94] August 23, 2004 P-Cube Service Delivery Platform Israel $200,000,000 [95] September 9, 2004 NetSolve Information technology United States $128,500,000 [96][97] September 13, 2004 dynamicsoft Communication software United States $55,000,000 [98][99] October 21, 2004 Perfigo Computer networking United States $74,000,000 [100] November 17, 2004 Jahi Networks Network management United States $16,000,000 [101] December 9, 2004 BCN Systems Routers United States $34,000,000 [102] December 20, 2004 Protego Networks Network security United States $65,000,000 [103] January 12, 2005 Airespace Wireless LAN United States $450,000,000 [104][105] April 14, 2005 Topspin Communications LAN switching United States $250,000,000 [106][107] April 26, 2005 Sipura Technology Voice over Internet Protocol United States $68,000,000 [108][109] May 23, 2005 Vihana Semiconductors United States $30,000,000 [110][111] May 26, 2005 FineGround Networks Network security United States $70,000,000 [112][113] June 14, 2005 M.I. Secure Corporation Virtual private networks United States $13,000,000 [114] June 27, 2005 Netsift Computer networking United States $30,000,000 [115] July 22, 2005 KISS Technology Entertainment technology Denmark $61,000,000 [116] July 26, 2005 Sheer Networks Service management United States $97,000,000 [117] September 30, 2005 Nemo Systems Computer networking United States $12,500,000 [118] November 18, 2005 Scientific Atlanta Digital cable United States $ 6,900,000,000 [119] November 29, 2005 Cybertrust Information gathering United States $14,000,000 [120] March 7, 2006 SyPixx Networks Surveillance United States $51,000,000 [121] June 8, 2006 Metreos Voice over Internet Protocol United States $28,000,000 [122] June 8, 2006 Audium Voice over Internet Protocol United States $19,800,000 [122] July 6, 2006 Meetinghouse Computer security United States $43,700,000 [123][124] August 21, 2006 Arroyo Video Solutions Video on demand United States $92,000,000 [125][126] October 10, 2006 Ashley Laurent Gateways United States — [127] October 25, 2006 Orative Mobile software United States $31,000,000 [128] November 13, 2006 Greenfield Networks Semiconductors United States — [129] December 15, 2006 Tivella Digital signage / IPTV United States — [130] January 4, 2007 IronPort Computer security United States $830,000,000 [131][132] February 9, 2007 Five Across Social networking service United States — [133][134] February 21, 2007 Reactivity Web services United States $135,000,000 [135][136] March 5, 2007 Utah Street Networks Social networking service United States — [137][138] March 13, 2007 NeoPath Data storage United States — [139][140] March 15, 2007 WebEx Web conferencing United States $ 3,200,000,000 [141][142] March 28, 2007 SpansLogic Computer networking United States — [143][144] May 21, 2007 BroadWare Technologies Surveillance United States — [145][146] September 18, 2007 Cognio Mobile software United States — [147][148] September 27, 2007 Latigent Business performance management United States — [149][150] October 23, 2007 Navini Networks WiMAX United States $330,000,000 [151][152] November 1, 2007 Securent Digital rights management United States $100,000,000 [153][154] April 8, 2008 Nuova Systems, Inc. Computer networking United States $678,000,000 [155] June 10, 2008 DiviTech A/S Digital service management Denmark — [156] July 23, 2008 Pure Networks, Inc. Computer software United States $120,000,000 [157] August 27, 2008 PostPath Email United States $215,000,000 [158] September 19, 2008 Jabber, Inc. Presence United States — [159] January 27, 2009 Richards-Zeta Building Intelligence Building management systems United States — [160] March 19, 2009 Pure Digital Technologies Digital video United States $590,000,000 [161][162] May 1, 2009 Tidal Software Job scheduling United States $105,000,000 [163] October 27, 2009 ScanSafe SaaS Web Security Provider United Kingdom $183,000,000 [164][165] November 2, 2009 Set-top box business of DVN Cable China — [166] December 18, 2009 Starent Networks System Architecture Evolution United States $ 2,900,000,000 [167] April 18, 2010 Tandberg Videoconferencing Norway $ 3,300,000,000 [168] May 18, 2010 MOTO Development Group Product design United States — [169] May 20, 2010 CoreOptics Digital signal processing United States — [170] August 26, 2010 ExtendMedia Video United States — [171] September 2, 2010 Arch Rock Corporation Smart Grid United States — [172] December 1, 2010 LineSider Technologies Network Management Software United States — [173] January 26, 2011 Pari Networks Network Configuration and Change Management (NCCM) United States — [174] February 4, 2011 Inlet Technologies Adaptive Bit Rate (ABR) digital media processing platforms United States $95,000,000 [175] March 29, 2011 newScale Inc. [Cisco Intelligent Automation for Cloud] United States — [176] August 21, 2011 AXIOSS Software and Talent IT Service Management Software Finland $31,000,000 [177][178] August 29, 2011 Versly Integrated Software United States — [179][180] October 20, 2011 BNI Video Video United States $99,000,000 [181][182] March 15, 2012 NDS Group Conditional Access United Kingdom $ 5,000,000,000 [183] March 19, 2012 Lightwire Silicon Photonics United States $271,000,000 July 16, 2012 Virtuata Software Security United States — [184] November 15, 2012 Cloupia Cloud Services United States $125,000,000 [185] November 19, 2012 Meraki Wired and Wireless Cloud Networking United States $ 1,200,000,000 [186] November 29, 2012 Cariden Network planning, design and traffic management solutions for telecommunications service providers United States $141,000,000 [187] January 23, 2013 Intucell Mobile Software Israel $475,000,000 [188] January 29, 2013 Cognitive Security Cyber Threat Protection Czech Republic — [189] March 25, 2013 SolveDirect Cloud services Austria $21,194,000 [190] April 3, 2013 Ubiquisys Mobile software United Kingdom $310,000,000 [191] May 29, 2013 JouleX Energy Management United States $107,000,000 [192] July 30, 2013 Composite Software Data Virtualization United States $180,000,000 [193] July 23, 2013 Sourcefire Computer Security United States $ 2,700,000,000 [194][195] August 30, 2013 BroadHop Leading provider of next generation policy control and service management for carrier networks worldwide. United States September 10, 2013 Whiptail Scalable solid state memory system provider United States $415,000,000 [196][197] December 10, 2013 Insieme Application-centric data center infrastructure United States — [198] December 17, 2013 Collaborate.com Mobile collaboration and cloud computing United States — [199] February 2014 Tetration Analytics Data Center Analytics and Security Solution United States — June 16, 2014 ThreatGRID Unified malware analysis and threat intelligence United States — [200] June 27, 2014 Assemblage Cloud collaboration software Denmark — [201] July 9, 2014 Tail-f Systems Network service orchestration solutions Sweden — [202] July 27, 2014 Metacloud Deploys and operates private clouds for global organizations with a unique OpenStack-as-a-Service model United States — [203] May 29, 2015 Tropo Provides development platform for real time communications United States — [204] December 10, 2014 Neohapsis Security Consulting United States — [205] April 13, 2015 Embrane Application-centric network services including firewalls (FW), virtual private networks (VPNs), load balancers (LB) and SSL offload engines United States — [206] June 12, 2015 Piston Cloud Computing Provides software that enables streamlined operational deployment of large scale distributed systems United States — [207] June 30, 2015 OpenDNS Cloud-delivered enterprise security service United States $635,000,000 [208] July 7, 2015 MaintenanceNet Provides a cloud-based software platform that uses data analytics and automation to manage and scale attach and renewals of recurring customer contracts. United States $139,000,000 [209] October 12, 2015 Pawaa Provides secure on-premise and cloud-based file sharing software. India — October 25, 2015 1 Mainstream Offers a cloud-based video platform designed to quickly launch live and on-demand OTT video services to a variety of connected devices United States — [210] November 3, 2015 ParStream Realtime Edge Analytics Database for IoT Germany — [211] November 20, 2015 Acano Acano provides collaboration infrastructure and conferencing software United Kingdom $700,000,000 [212] December 22, 2015 Lancope Enhances Cisco's Security Everywhere strategy. United States $452,500,000 [213] February 3, 2016 Jasper Technologies Developers of an Internet of Things cloud platform United States $ 1,400,000,000 [214] March 1, 2016 CliQr Technologies Application defined cloud orchestration platform United States $260,000,000 [215] March 2, 2016 Leaba Semiconductor Fabless Semiconductor Israel $320,000,000 [216] June 28, 2016 CloudLock Cloud-Security Provider United States $293,000,000 [217] October 17, 2016 Heroik Labs, Inc / Worklife Meeting productivity United States January 24, 2017 AppDynamics Application Performance Management United States $ 3,700,000,000 [218] May 1, 2017 Viptela Inc. Software-defined WAN United States $610,000,000 [219] May 11, 2017 MindMeld Inc. Conversational Artificial Intelligence United States $125,000,000 [220] July 31, 2017 Observable Networks, Inc. Cloud-Security Provider United States — [221] September 22, 2017 Springpath Inc Hyper-converged Data Platform United States $320,000,000 [222] October 19, 2017 Perspica, Inc. Machine Learning United States — [223] October 25, 2017 BroadSoft Cloud Collaboration and Contact Center Platform United States $ 1,900,000,000 [224] December 21, 2017 Cmpute.io (47Line Technologies) software solution to analyze cloud-deployed workloads and consumption patterns for cost-optimization strategies India — [225] February 9, 2018 Skyport Systems Cloud managed secure edge compute server platform United States — [226] May 1, 2018 Accompany Develops a relationship intelligence platform and has built one of the richest databases of decision makers in the world United States — [227] June 19, 2018 July Systems Cloud-based mobile experience and location services United States — [228] November 21, 2018 Ensoft Ltd Software solutions for service provider networks United Kingdom — [229] August 2, 2018 Duo Security Cloud-based Cyber-Security United States $ 2,350,000,000 [230] December 18, 2018 Luxtera Privately-held semiconductor company United States — [231] December 18, 2018 Singularity Networks Network Analytics Company United States — [232] June 6, 2019 Sentryo Cybersecurity for the Industrial Internet France — [233] July 9, 2019 Acacia Communications Optical Interconnects United States $ 2,600,000,000 [234] August 6, 2019 Voicea Meeting transcription, voice search, and meeting highlights/action items United States April 6, 2020 Fluidmesh Networks Wireless mesh networks Italy [235] May 28, 2020 ThousandEyes Cloud & Internet Intelligence for Enterprises and Service Providers United States $ 1,000,000,000 [236] July 31, 2020 Modcam Video analytics Sweden — [237] September 30, 2020 BabbleLabs Computer audio background noise reduction software United States — [238] October 1, 2020 Portshift Computer application security solutions Israel — [239] November 16, 2020 Banzai Cloud Secure cloud-native application deployment Hungary — [240] February 19, 2021 IMImobile Cloud communications software United Kingdom $730,000,000 [241] June 22, 2021 Sedona Systems Cross-Domain Network Controller Israel — [242] June 30, 2021 Kenna Security Risk-based Vulnerability Management United States — [243] July 8, 2021 Socio Labs Event technology platform United States — [244] September 28, 2022 Syrmia Networks Embedded System Software Serbia — [245] February 24, 2023 Valtix Cloud network security United States — [246] March 29, 2023 Lightspin Cloud security Israel — [247] May 31, 2023 Armorblox AI-powered threat detection United States — [248] June 21, 2023 Accedian High Performance Service Assurance Canada — [249] August 31, 2023 Oort Identity security and management United States — [250] September 21, 2023 Splunk Cybersecurity and Observability United States $ 28,000,000,000 [3] December 21, 2023 Isovalent Cloud Networking and Security United States — [251]

Composite Software