Last updated: 24 May 2026
Singapore VOIP buyers usually weigh more than seat pricing. The stronger providers can explain SIP trunk redundancy, number porting from incumbent carriers, cloud-PBX call quality on local circuits, and how their platform handles IMDA compliance, emergency dialling, and call recording for regulated industries.
Calilio is a cloud-based virtual phone system targeting small and mid-sized businesses, sales teams, and customer-support operations. The platform offers business phone numbers in 100+ countries, shared inboxes, IVR menus, call recording, voicemail transcri...
PCIN Link System is a Singapore-licensed services-based telecommunications operator providing international voice termination, SIP trunking, and wholesale carrier services. The company operates within the IMDA-licensed SBO framework, focusing on least-cost-...
Cal4Care, operating as CalnCall, is a provider of system integration products and services that is changing how businesses communicate with customers and partners. The company helps organisations track, measure, and authenticate their processes from initial...
Vonage Business Communications (VBC) is a unified communications product from Vonage, an Ericsson company, that integrates business phone, video meetings, team messaging, and SMS into a single platform. The product serves SMBs and mid-market customers globa...
Mitel is a unified communications provider delivering voice, messaging, video conferencing, and contact center solutions to businesses worldwide. The company serves over 70 million users across healthcare, education, financial services, government, and hosp...
Dialpad Connect is the unified-communications product within Dialpad's AI-powered customer-intelligence platform, combining business phone, video meetings, team messaging, and SMS for organisations of all sizes. The product runs on Dialpad's proprietary AI...
Avaya Unified Communications provides enterprise voice, messaging, video, and contact-centre capabilities through the Avaya Aura platform, IP Office for mid-market customers, and Avaya Cloud Office (powered by RingCentral) for cloud-first deployments. The p...
SPConnect is a Singapore-licensed services-based telecommunications operator providing international voice termination, SIP trunking, and wholesale carrier services. The company operates within Singapore's IMDA-licensed SBO framework, with a focus on least-...
Crexendo is a US-based cloud communications provider offering hosted UCaaS, contact center, and SIP trunking services. The company also provides the Crexendo NetSapiens platform, which powers other UC service providers globally. Crexendo operates with a dua...
Planet Alpha is an IT services and IT consulting company that operates with a resource network covering thousands of operators in over 200 countries and regions worldwide. Driven by bold ambitions and simplicity, Planet Alpha integrates into how the world c...
SIPTEL Singapore provides Voice over Internet Protocol (VOIP) and Private Branch Exchange (PBX) services to businesses in Singapore. The company offers solutions including SIP trunking, internet calling, and hosted PBX. Services are designed for rapid deplo...
Inaani is a global retail and wholesale VoIP service provider. The company offers VoIP reseller services, enterprise solutions, and wholesale platforms for buying and selling VoIP routes. Inaani also provides hosting for softswitch, dialer, and tunneling se...
Call4tel is a Singapore-based provider of VoIP solutions, specializing in 3CX-certified PBX appliances and gateways for business communication. Their product line includes on-premise appliances pre-installed with 3CX and Debian, supporting up to 800 users....
Crystal Voice, operated by Crystal Net Pte Ltd, is a Singapore-based company specialising in innovative internet-based telephone services built on Voice over Internet Protocol technology. A distinguishing feature is the deep integration of its calling servi...
GoTo Connect is the unified-communications platform from GoTo (formerly LogMeIn), combining cloud business phone, video conferencing, team messaging, and SMS in a single application. The product targets small and mid-sized businesses, professional-services...
Telnyx CPaaS is a US-headquartered communications platform-as-a-service provider offering programmable voice, messaging, and AI infrastructure APIs on its private global IP network. The platform serves developers, enterprises, and AI builders embedding voic...
RingCentral provides an Agentic Voice AI platform designed to automate, assist, and analyze customer interactions. The platform is utilized by over 600,000 businesses. RingCentral's offerings include business phone, video meetings, team messaging, SMS, fax,...
Zoom offers an AI-first work platform that connects communication and collaboration. Its product suite includes Zoom Meetings, Zoom Phone, Zoom Rooms, Zoom Contact Center, Zoom Webinars, and AI-powered tools like My Notes and ZoomMate. The platform supports...
Sangoma Unified Communications provides essential business communication solutions, including scalable voice, video, networking, and security. The company offers bundled technologies and 24/7 support to help reduce operating costs, shorten deployment times,...
TechDirectory.sg could not verify a current public service description for advoco from the listed website or reliable search results as of July 10, 2026. The available material was unavailable, unrelated, inactive, or too thin to support a factual company o...
TeleCMI is a cloud communications provider serving over 3,500 businesses globally with voice AI agents, cloud PBX systems, contact center solutions, and business phone services. The platform supports voice, SMS, and WhatsApp channels and provides post-call...
Webex Suite is Cisco's integrated unified-communications and collaboration platform combining Webex Calling (cloud telephony), Webex Meetings (video conferencing), Webex Messaging (team chat), Webex Contact Center, Webex Events, and the AI-powered Webex Ass...
Axilant Technologies is a Singapore-based system integrator and managed-services provider focused on enterprise networking, unified communications, structured cabling, and audio-visual integration. The company designs and deploys LAN/WAN networks, IP teleph...
Maven Lab is a Singapore-based Communications Platform as a Service (CPaaS) provider that offers programmable cloud communication APIs and complete communication solutions. The company's core offerings include SMS, voice, video, and omnichannel messaging ca...
Confirm local voice compliance first. Business VoIP touches numbering, emergency calling, call recording, retention, and sometimes regulated customer communications. Ask whether the provider supports IMDA-compliant IP telephony, Singapore number portability, emergency services routing, and clear ownership of SIP trunks. If the service uses an overseas platform, confirm where call records and recordings are stored.
Match the phone architecture to your operating model. Some buyers need cloud PBX for simple seat-based calling. Others need SIP trunking into an existing PBX, Microsoft Teams Phone, Zoom Phone, or a contact-centre system. The right provider should explain the tradeoff between hosted PBX, pure SIP trunks, Teams Direct Routing or Operator Connect, BYOC, and hybrid migration from legacy PSTN.
Pay attention to Singapore numbering. Buyers often care about 6-series fixed-line numbers, 3-series IP telephony ranges, virtual phone numbers, number porting, and caller-ID presentation. These details affect brand trust and operational continuity. Ask whether new numbers and ported numbers have different pricing or lead times, and whether the provider can preserve current call flows during migration.
Test quality before full rollout. Voice problems are visible immediately to customers. Run a pilot with real users, real headsets, real network paths, and failover scenarios. Check jitter, packet loss, mobile app quality, call recording, CRM screen-pop, queue behaviour, and support escalation before porting every number.
Corporate VoIP is widely used in Singapore, but public voice services and numbering are regulated. Buyers should confirm that their provider has the appropriate licensing, supports emergency calling, and handles Singapore numbering and records appropriately.
Check support for 3-series and 6-series numbers, number porting, virtual phone numbers, caller-ID presentation, emergency calling, and whether ported numbers are priced differently from new numbers.
SIP trunking fits businesses keeping an existing PBX or contact centre. Cloud PBX fits simpler seat-based calling. Teams Phone fits Microsoft-centric businesses that want calling inside Teams, but still need a carrier or operator model for PSTN connectivity.