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Netpluz Asia is a managed communications service provider based in Asia.
★ Category overview
VOIP Providers in Singapore
Last updated: 20 July 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.
What to look for
- Singapore-hosted SIP infrastructure with documented uptime and failover.
- Smooth number portability from your incumbent fixed-line and mobile carriers, with lead times confirmed up front.
- Cloud PBX or UCaaS with Teams / Zoom / CRM integrations your team already uses.
- Clear handling of IMDA licensing, call recording retention, and emergency services routing.
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Axilant Technologies is a Singapore-based system integrator and managed-services provider focused on enterprise…
Cal4Care Group is a distributor of Unified Communications (UC) and Telco solutions, established in 2005.
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Headquartered in Singapore with offices across Asia, Innovax Systems develops OpsCentral, an AI-powered cloud contact…
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Knowlarity is a Singapore-headquartered cloud-communications company and one of the largest providers of cloud-based…
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Micro Cloud Technology is a Singapore-based cloud-communications company providing global messaging and voice solutions…
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Singapore SMART Telecommunications Pte Ltd, trading as Smarttel, is a services-based telecom operator incorporated in Singapore in October 2001.
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1FONEGLOBAL PTE. LTD. is a global telecommunication service provider headquartered in Singapore.
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Ace Peak provides a cloud phone system and AI contact center built on a Tier 1 network.
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advoco develops conversational artificial intelligence for private contact-centre operations.
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Allo provides an AI-powered business phone system, primarily serving sales teams that rely on phone communication.
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AVOXI provides enterprise cloud communications with international voice coverage in over 150 countries.
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Borderless Hub, a subsidiary of Ascent Solutions, provides unified communication (UC) and IoT/M2M products and solutions.
Calilio is a cloud-based virtual phone system targeting small and mid-sized businesses, sales teams, and customer-support operations.
CallTower is a US-based unified communications service provider offering hosted Microsoft Teams Voice, Cisco Webex…
Cataleya is a Singapore-headquartered telecommunication company providing voice communication enablement solutions for…
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Crexendo is a US-based cloud communications provider offering hosted UCaaS, contact center, and SIP trunking services.
Debross Pte. Ltd. is a Singapore-registered company operating in the telecommunications industry.
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Deltel Technologies Singapore is a Singapore-licensed services-based operator providing international voice…
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Dodid is a Singapore-based unified-communications and cloud PBX service originally launched as an SMB-focused VoIP…
Exridge Pte Ltd provides telecommunication and unified communications solutions, offering white-label VoIP software and services.
Grasshopper is a virtual phone system designed for entrepreneurs and small businesses seeking a professional business…
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Hoiio provides modular cloud communication solutions for enterprises in Singapore, aiming to simplify communication setup.
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How to choose a VoIP provider in Singapore
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.
Frequently asked questions
Are VoIP systems legal for corporate use under IMDA regulations?
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.
What Singapore phone number features should I check?
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.
Should I choose SIP trunking, cloud PBX, or Teams Phone?
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.