Nextgen
NextGen is a Tokyo-based Japanese ICT firm that builds SIP/VoIP infrastructure, SBC, cloud PBX, CPaaS, mobile core, and local 5G solutions, serving telecom carriers (KDDI, NTT Com, NTT Docomo), enterprises, and developers via its VOICEMARK and U-cube brands.
- Company typePublic
- Founded2001
- HeadquartersTokyo, Japan
- Headcount101–250
- GTM typeB2B
- OfferingSoftware
What Nextgen does
NextGen (株式会社ネクストジェン) is a Tokyo-headquartered Japanese information and communication technology firm founded in 2001 and listed on the Tokyo Stock Exchange (ticker 3842.T, listed February 2025 after a prior Osaka Securities Exchange / Hercules listing). The company builds and sells SIP/VoIP infrastructure and cloud communications software, organized under two sub-brands: VOICEMARK for on-premises enterprise solutions (Session Border Controllers such as NX-B5000, IP-PBX NX-C1000, call-recording hardware LA-6000, VoIP IDS NX-C6000) and U-cube for subscription cloud services (U-cube voice cloud PBX, U-cube CPaaS, U-cube cogni speech-to-text, U-cube connect AI IVR, U-cube friends interconnection, U-cube rec, U-cube enabler). Beyond enterprise voice, NextGen supplies carrier-grade infrastructure including IMS (NXI series), Full MVNO enablement (HSS/HLR, SMSC, IMS, EPC), and end-to-end Local 5G solutions (vCore, vRAN, RU hardware, SIM/HSS, area design and licensing consulting).
The business operates a hybrid revenue model combining one-time on-premises software and hardware licensing (NX-B5000, NX-C1000, LA-6000, local 5G base stations, SIM cards), recurring U-cube SaaS subscriptions, professional services for PSTN migration, MVNO, and 5G deployments, and channel/OEM revenue from partners such as Panasonic Connect, Tsuzuki Denki, CTC, and Avaya Japan. Customers span Japanese Tier-1 telecom carriers (KDDI, NTT Communications, NTT Docomo, Japan Communications), large enterprises and regulated verticals (Nara Shinkin Bank, Matsuno Town government, AIESEC Japan), contact center platforms (Avaya, Genesys, Cisco UCM), and developers building on U-cube CPaaS via the NextGen CaMP marketplace. Distribution combines direct enterprise field sales, a certified partner/reseller network, an OEM/embedded channel, and self-serve cloud subscription access.
The company holds METI DX-certified operator status (since 2022, renewed 2024) and ISO/IEC 27001/27017/27018 certifications. FY2026 revenue of approximately 4 billion yen with two consecutive years of record profits has been described by the company as the start of a 'second growth period,' supported by recent certifications (Microsoft Teams Direct Routing SBC, Japan's first domestic-vendor SBC), the Japan Communications Full MVNO win, the Panasonic Connect sales-agent agreement, and ongoing AI integrations (Genesys Cloud CX AudioHook Monitor, Microsoft Azure AI NLP).
Nextgen firmographics
Firmographics- Name
- Nextgen
- Legal name
- 株式会社ネクストジェン
- Website
- https://nextgen.co.jp
- Company type
- Public
- Founded year
- 2001
- Operating status
- Operating
- Headcount range
- 101–250 employees
- Short description
- NextGen is a Tokyo-based Japanese ICT firm that builds SIP/VoIP infrastructure, SBC, cloud PBX, CPaaS, mobile core, and local 5G solutions, serving telecom carriers (KDDI, NTT Com, NTT Docomo), enterprises, and developers via its VOICEMARK and U-cube brands.
- Ownership category
- akta.pro rank
Nextgen industry classification
Industry- Product category
- Telecommunications Infrastructure Software
- NAICS
- Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (518210)
- SIC
- Services-Telephone Interconnect Systems (7385), Computer Communications Equipment (3576)
- akta.pro primary industry
- Cloud PBX & Hosted Telephony (HDAIAHAB)
- akta.pro secondary industries
- VoIP/ATA & Integrated Voice Gateways (CPE) (HDAFAIAJ), Contact Center (CCaaS) & Customer Engagement Voice (HDAIAHAF)
Keywords
Where Nextgen is headquartered
LocationHeadquarters
- HQ city
- Tokyo
- HQ country
- Japan
- HQ region
- Asia
Offices2 records
Markets served
Nextgen business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Personnel, Technology or R&D, Marketing or Sales, Operations, Infrastructure
Revenue model
- Software Licensing (On-premise): Sale of on-premise VoIP equipment including SBC (NX-B5000), IP-PBX (NX-C1000), softswitches, IMS solutions, call recording hardware (LA-6000), and VoIP security tools. One-time license and maintenance revenue.
- Cloud/SaaS Subscriptions: Recurring subscription revenue from U-cube brand cloud services including U-cube CPaaS, U-cube voice (cloud PBX), U-cube connect (IVR), U-cube cogni (voice-to-text), U-cube friends (interconnect), U-cube rec (cloud call recording), and U-cube enabler (service platform). These are monthly/annual subscription services.
- Professional Services: Consulting and system integration for PSTN migration, local 5G deployment, Full MVNO solutions, and contact center modernization. Includes technical consulting, network design, licensing support, and managed services.
- Hardware Sales: Sale of network equipment, base stations (local 5G), SIM cards, and mobile core infrastructure components as part of turnkey solutions.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Monthly | U-cube subscription services are offered as monthly or annual subscriptions with tiered plans based on service features and usage volume. |
Go-to-market motion3 records
Distribution channels5 records
Marketing channels6 records
Nextgen product offering
Product offeringCore offering
NextGen develops and sells VoIP/SIP infrastructure software and cloud communication services for telecom carriers and enterprises. Its portfolio includes Session Border Controllers (SBC), IP-PBX, Cloud PBX, CPaaS APIs, call recording, voice-to-text, mobile core (EPC/5GC), local 5G, and full MVNO solutions under the VOICEMARK on-premise brand and U-cube subscription cloud brand.
Product overview
Nextgen operates a dual-brand product portfolio comprising on-premises enterprise solutions under the VOICEMARK brand and cloud subscription services under the U-cube brand. VOICEMARK (VOICEMARK) covers on-premises call recording (LA-6000, VoISplus), Session Border Controllers (NX-B5000), and IP-PBX systems (NX-C1000). U-cube is a modular cloud subscription platform offering cloud PBX (U-cube voice), communication APIs (U-cube CPaaS), AI voice services (U-cube cogni), call routing automation (U-cube connect), mobile call recording (U-cube rec), service interconnection (U-cube friends), and service enablement (U-cube enabler). The company also provides specialized products for carriers and enterprises including local 5G solutions, full MVNO enablement, VoIP security tools (NX-V3S, NX-V3R, NX-C6000), IMS systems (NXI series), IP-PTT (NX-PTT), and a CPaaS marketplace (NextGen CaMP). The portfolio is organized around four solution domains: DX, Voice Recognition & AI, PSTN Migration, and Mobile Communications.
Differentiator
Problem solved
Functional benefit
Brands
- VOICEMARK: Enterprise on-premise products and solution brand including LA-6000, NX-B5000 for Enterprise, NX-C1000 for Enterprise, VoISplus
- U-cube
- U-cube CPaaS
- U-cube friends
- U-cube voice
- U-cube cogni
- U-cube rec
- U-cube connect
- LOG AGENT
- VoIS
- VOTEX
- Pluscom
Products and services
- LA-6000 Voice Capture System Voice capturing hardware appliance for contact centers that records call audio, integrated with Genesys Cloud CX AudioHook Monitor API and Microsoft Azure AI NLP services for AI-powered contact center capabilities.
- NX-B5000 for Enterprise (Session Border Controller) Enterprise Session Border Controller providing VoIP security, interoperability, and PSTN migration support. First Japanese SBC to achieve Microsoft Teams Direct Routing certification.
- NX-C1000 for Enterprise (IP-PBX) Enterprise IP-PBX / softswitch providing class 5 SIP server functionality for enterprise VoIP deployments, supporting multi-carrier and multi-device environments.
- VoISplus (On-premise Call Recording Management) On-premises call recording management system for recording, storing, and managing call audio data across enterprise call centers and distributed office locations.
- U-cube CPaaS Communication Platform as a Service providing a developer-facing API platform for building omnichannel communication applications. Powers the NextGen CaMP marketplace.
- U-cube cogni Cloud-based BPO service that converts call audio and recorded voice to text using speech recognition AI, enabling compliance, quality management, and analytics from voice data.
- U-cube friends Cloud-based service interconnection (SBC) solution that interconnects traditional IP phone or cloud PBX systems with web conferencing services and CPaaS platforms, enabling full cloudification of telephone infrastructure.
- U-cube enabler Service platform backbone providing the cloud infrastructure for U-cube services, enabling partner scaling and service operation efficiency with security enhancements.
- U-cube rec Cloud-based call recording management service for NTT Docomo mobile phones, providing storage, management, and web browser-based search and playback of call recording data.
- U-cube connect AI-powered multichannel IVR service that automates call routing using voice recognition; AI recognizes the called party's name from caller's voice and transfers calls to smartphones; supports SMS and FAX channels.
- U-cube voice (Cloud PBX) Cloud PBX service providing PBX functionality plus extension calling via cloud, eliminating the need for on-premises PBX. Supports smartphone internal phone use cases for remote and mobile workers.
- NX-PTT (IP Push-to-Talk) IP-based Push-to-Talk solution enabling instant group voice communication over IP networks, suitable for enterprise and field workforce coordination.
- AGEphone Cloud Cloud-based softphone solution enabling IP telephony via desktop or mobile applications, supporting enterprise communication and remote work scenarios.
- iPult (Unmanned Reception System) Unmanned reception and guidance system using AI to automate visitor reception, direction, and information delivery without human staff.
- Local 5G Solutions End-to-end local 5G solution encompassing consulting, area design, licensing support, vCore/vRAN software, base station hardware, SIM/HSS management, and operational services for enterprises and local governments building private 5G networks.
- Full MVNO Solution Full MVNO enablement solution providing L2 connection, EPC/PGW/PCRF equipment, HSS/HLR, SMSC, and IMS for voice services in a one-stop package, with consulting support for MNO technical negotiations.
- SLMS (SIM Lifecycle Management System) SIM lifecycle management system for mobile operators and MVNOs to manage SIM card provisioning, lifecycle events, and subscriber data within EPC/5GC core networks.
- NX-C6000/NX-C6500 (VoIP IDS/Network Forensics) VoIP network forensics and intrusion detection system providing visibility into VoIP communications, enabling security monitoring and troubleshooting of SIP/VoIP networks.
- NX-V3S (VoIP/SIP Vulnerability Detection Tool) VoIP/SIP vulnerability testing tool that sends problem-prone SIP messages to identify security weaknesses in VoIP systems, IMS, and NGN deployments.
- NX-V3R (RTP/RTCP Vulnerability Test Tool) RTP/RTCP vulnerability testing tool for detecting security weaknesses in real-time transport protocol implementations in VoIP environments.
- NX-C7000 (Operations Management/Monitoring) Operations management and monitoring system for PSTN migration and VoIP infrastructure, providing EMS capabilities for network element supervision.
- SIP/VoIP Security Diagnosis Service Security consulting and diagnostic service for SIP/VoIP networks, identifying vulnerabilities and providing remediation guidance for carrier-grade and enterprise VoIP deployments.
- NXI Series (IMS) IMS (IP Multimedia Subsystem) solution supporting hybrid IMS configurations that bridge existing VoIP infrastructure with next-generation IMS services for communication carriers.
- NextGen CaMP (CPaaS Marketplace) CPaaS marketplace platform for NextGen's partner ecosystem, enabling partner companies to develop cloud applications on U-cube CPaaS and exchange/offer them among marketplace members.
- ForeSight Voice Mining Call center AI product that analyzes recorded calls for quality management, customer experience improvement, and operational insights; supports Cisco Unified Communications Manager integration.
- NX-C2100 (3PCC Third-Party Call Control) Third-Party Call Control (3PCC) server enabling call control and routing integration between disparate communication systems.
Quantifiable outcome
- 80% reduction in fixed-line phones at Nara Shinkin Bank through smartphone internal phone deployment
- +3 more outcomes
Companies that use Nextgen
Customer profileNamed customers7 records
Segments5 records
Ideal customer profiles5 records
Nextgen technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration9 records
AI capability8 records
Feature8 records
Nextgen partnerships and signals
Strategic signalPartnerships
Eleven partnerships are on record, tiered core, major and minor.
- NTTコミュニケーションズ (via Arcstar IP Voice)coreIntegration of U-cube friends cloud SBC with NTT Docomo Business Arcstar IP Voice service, enabling full cloud transformation of telephone infrastructure. Distributed through partner 都築電気.
- パナソニック コネクト (Panasonic Connect)majorSales agent agreement enabling Panasonic Connect to offer NextGen's U-cube cloud PBX and other U-cube services, expanding distribution reach to Panasonic's enterprise customer base.
- ARCO JapanminorPartnership in the refurbished device market combining refurbished hardware with cloud services, balancing cost competitiveness with sustainability in enterprise communications deployment.
- Microsoft CorporationcoreNextGen's NX-B5000 SBC became the first Japanese vendor to receive Microsoft Teams Direct Routing certification (April 16, 2025), enabling seamless integration between enterprise phone systems and Microsoft Teams for external/internal calling.
- GenesyscoreNextGen's LA-6000 voice capture system integrated with Genesys Cloud CX AudioHook Monitor API, enabling contact center AI adoption and supporting DX acceleration on the world's top-share platform.
- 都築電気 (Tsuzuki Denki)majorCPaaS platform sales partnership where Tsuzuki Denki distributes NextGen's U-cube CPaaS to its enterprise customers, combining NextGen's communication platform with Tsuzuki's system integration capabilities.
- 日本通信 (Japan Communications)coreNextGen's NX-B5000 SBC was selected for Japan Communications' domestic first Full MVNO service (scheduled to launch May 2026), supporting the neocarrier strategy with core system infrastructure for the Full MVNO network.
- 電話放送局 (Denwa Hōsōkyoku)minorCollaboration partnership to expand business domain by combining CPaaS and AI technologies with IVR system market top-share expertise, targeting enterprise communication solutions.
- 日本アバイア (Avaya Japan)coreJoint go-to-market for contact center full cloud migration. NextGen's SBC enables Avaya Aura platform to connect to carrier VoIP networks while maintaining existing fixed phone numbers, targeting full cloud migration.
- NextGen CaMP Partners (multiple)majorCPaaS marketplace where partner companies develop and share cloud applications on NextGen's U-cube CPaaS platform, promoting collaboration and expansion of the DX solution market.
- フィックスポイント / エクシオ・デジタルソリューションズminorThree-party collaboration to promote CSM area enrichment in the ITOM market, combining NextGen's voice communication technology with Fixpoint and Ekusio Digital Solutions expertise.
Scale indicators5 records
Recent moves6 records
Expansion highlights6 records
Nextgen competitors and assessment
Company assessmentDirect peers
- AudioCodes: AudioCodes is a global SBC and VoIP infrastructure vendor selling session border controllers, IP phones, and UCaaS enablement to carriers and enterprises. It is the closest international analogue to NextGen's NX-B5000 SBC and IMS product lines, competing head-to-head in carrier VoIP deployments.
- Twilio: Twilio is the global CPaaS leader enabling developers to embed voice, SMS, and messaging into applications. Its communications platform directly competes with NextGen's U-cube CPaaS in developer-facing communication APIs and omnichannel orchestration.
- Internet Initiative Japan (IIJ): IIJ is a major Japanese network, cloud, and SIP trunking provider offering carrier-grade VoIP and enterprise UC services. It directly overlaps NextGen's enterprise voice communication and SIP interconnect business in the Japanese market.
- Mitel Networks: Mitel provides on-premise and cloud PBX, contact center, and SBC products to enterprises globally. It competes with NextGen's NX-C1000 IP-PBX, cloud PBX, and LA-6000 call recording in mid-market and enterprise voice deployments.
- Sangoma Technologies: Sangoma provides UCaaS, PBX, SBC, and SIP trunking products (Star2Star, Switchvox, FreePBX) targeting SMB and enterprise voice communications. Its broad voice infrastructure portfolio and channel-driven distribution model closely mirror NextGen's VOICEMARK on-premise plus U-cube cloud approach.
Broad incumbents
- RingCentral: RingCentral is a major global UCaaS and cloud PBX provider serving enterprises of all sizes. As RingCentral expands into the Japanese market, it competes with U-cube voice for enterprise cloud telephony workloads.
- Cisco (Webex Calling): Cisco provides UC and SBC infrastructure through Webex Calling, Cisco Unified Communications Manager, and BroadWorks. It competes with NextGen's SBC, IP-PBX, and Cloud PBX products for enterprise voice infrastructure budgets globally and in Japan.
- Avaya Holdings: Avaya provides contact center platforms and UC solutions, with NextGen being a technical partner for cloud migration via NX-B5000 SBC integration. Avaya is both a partner and competitor in on-premise-to-cloud migration projects for Japanese contact centers.
- NICE Ltd: NICE provides contact center analytics, call recording, and voice AI solutions (NICE CXone, Enlighten). Its interaction analytics overlap with NextGen's ForeSight Voice Mining and U-cube cogni transcription offerings.
Emerging players
- Five9: Five9 is a cloud contact center (CCaaS) vendor integrating AI and analytics. Its integration with Genesys Cloud CX is parallel to NextGen's LA-6000 voice capture and ForeSight Voice Mining offerings for contact center AI enablement.
Market position
Strengths5 records
Weaknesses4 records
Competitive moat6 records
Key risks5 records
Key highlights7 records
Customer concentration
Nextgen social profiles
Digital presenceNextgen compliance and trust
Trust signalCompliance4 records
Nextgen financial estimates
Financial estimateRevenue estimate
Valuation estimate
Nextgen leadership team
Management profileNumber of profiles
Profiles3 records
Nextgen subsidiaries and ownership
Company hierarchySubsidiaries3 records
Nextgen funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Nextgen M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Nextgen
What does Nextgen do?
NextGen develops and sells VoIP/SIP infrastructure software and cloud communication services for telecom carriers and enterprises. Its portfolio includes Session Border Controllers (SBC), IP-PBX, Cloud PBX, CPaaS APIs, call recording, voice-to-text, mobile core (EPC/5GC), local 5G, and full MVNO solutions under the VOICEMARK on-premise brand and U-cube subscription cloud brand.
Is Nextgen a public or private company?
Nextgen is a public company. It is classified as public and is currently operating.
When was Nextgen founded?
Nextgen was founded in 2001. It employs 101 to 250 people.
Where is Nextgen based?
Nextgen is headquartered in Tokyo, Japan, in the Asia region.
How does Nextgen make money?
Four revenue lines are on record. Software Licensing (On-premise) is the primary driver. The others are cloud/SaaS Subscriptions, professional Services and hardware Sales.
Who are Nextgen's main competitors?
Direct peers on record are AudioCodes, Twilio, Internet Initiative Japan (IIJ), Mitel Networks and Sangoma Technologies. Broad incumbents are RingCentral, Cisco (Webex Calling), Avaya Holdings and NICE Ltd. Five9 is listed as an emerging player.
Does Nextgen have an API?
Yes. U-cube CPaaS is a Communication Platform as a Service that enables developers and partners to build cloud communication applications. The platform provides a marketplace called NextGen CaMP, through which partner-developed cloud applications can be offered and consumed among members. No further API technical details (REST/GraphQL/webhook type, auth method, rate limits, versioning, or sandbox availability) are specified in the available source material.
What industry is Nextgen in?
Nextgen's product category is Telecommunications Infrastructure Software. Its primary akta.pro industry code is HDAIAHAB, Cloud PBX & Hosted Telephony, with a secondary code of HDAFAIAJ, VoIP/ATA & Integrated Voice Gateways (CPE). Its NAICS code is 518210 and its SIC code is 7385.