OnSIP
OnSIP is a US-based hosted VoIP provider, founded in 2004 and operated by Junction Networks, delivering cloud-based business phone systems with voice, SMS/MMS, video, and CRM integrations to over 150,000 small and medium-sized businesses.
- Company typePrivate
- Founded2004
- HeadquartersNew York, United States
- Headcount51–100
- GTM typeB2B
- OfferingSoftware
What OnSIP does
OnSIP, operated by legal entity Junction Networks, is a US-based hosted VoIP provider founded in 2004 that delivers cloud-based business phone systems to small and medium-sized businesses. Its core platform is built on SIP (Session Initiation Protocol) and WebRTC, anchored by a patented SIP Geographic Scaling System that distributes call control across colocation facilities for high redundancy. The offering combines hosted PBX voice with SMS/MMS, video calling, audio conferencing (up to 15 callers), five-room video conferencing, advanced ACD queues, and CRM integrations with HubSpot, Zendesk, and Odoo. OnSIP also publishes SIP.js, an open-source JavaScript library for WebRTC development, positioning the company within the developer ecosystem beyond its direct commercial product.
The company monetizes through three primary pricing tiers: a Basic monthly subscription, an Unlimited monthly subscription (which includes free Poly and Yealink desk phones subject to a five-user minimum), and a Pay-As-You-Go usage-based plan. Auxiliary revenue streams include phone number porting fees and international dialing charges. The go-to-market motion is product-led growth for the SMB long tail (free trial signup, self-serve onboarding, month-to-month contracts), supplemented by a direct phone-based sales team (1-800-801-3381) for mid-market and enterprise deployments, a customer referral program paying Visa eGift cards, and a formal channel sales arm. OnSIP claims 150,000+ business accounts and has been recognized by Gartner Digital Markets for Best Customer Support in each of 2023 through 2026. The company is privately held with no disclosed institutional funding, no subsidiaries, no M&A history, and no management team data beyond founder/CEO Michael Oeth. Operations are concentrated in the United States, with headquarters in Sunnyvale, California.
OnSIP firmographics
Firmographics- Name
- OnSIP
- Legal name
- Junction Networks
- Website
- https://onsip.com
- Company type
- Private
- Founded year
- 2004
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- OnSIP is a US-based hosted VoIP provider, founded in 2004 and operated by Junction Networks, delivering cloud-based business phone systems with voice, SMS/MMS, video, and CRM integrations to over 150,000 small and medium-sized businesses.
- Ownership category
- akta.pro rank
OnSIP industry classification
Industry- Product category
- Cloud Communications / Hosted VoIP
- NAICS
- Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services (518)
- SIC
- Telephone Communications (No Radiotelephone) (4813), Services-Telephone Interconnect Systems (7385)
- akta.pro primary industry
- Cloud PBX & Hosted Telephony (HDAIAHAB)
- akta.pro secondary industries
- VoIP Access & ITSP Services (HDAIAHAD), Contact Center (CCaaS) & Customer Engagement Voice (HDAIAHAF), Voice Calling (VoIP) Apps (BPAMACAC), Collaboration & Unified Communications Management (UCaaS/VoIP) (BPAEABAK)
Keywords
Where OnSIP is headquartered
LocationHeadquarters
- HQ city
- New York
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
OnSIP business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Technology or R&D, Infrastructure, Personnel, Marketing or Sales, Supply Chain
Revenue model
- Subscription Plans (Basic and Unlimited): Monthly subscription plans with two tiers: Basic plan and Unlimited plan. Unlimited plan includes free VoIP phones (5 users minimum), unlimited calling features, and all platform capabilities.
- Pay-As-You-Go: Usage-based pricing where customers are only charged for features and minutes they use. Can connect unlimited phones without extra cost under this model.
- Hardware Sales: VoIP phones included free with Unlimited plan (Poly and Yealink devices for 5+ users). Additional phones and equipment available for purchase separately.
- Phone Number Porting Services: Porting fee charged for transferring phone numbers to OnSIP's database, covering paperwork and staff time. Discounts available for large blocks of numbers.
- International Dialing: Additional charges for international phone number dialing beyond domestic calling.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Subscription | Monthly | Basic Plan - Entry-level hosted VoIP with core features |
| Subscription | Monthly | Unlimited Plan - Full-featured business VoIP with free phones |
| Usage-based | Pay-as-you-go | Pay-As-You-Go - Flexible usage-based pricing |
Go-to-market motion3 records
Distribution channels4 records
Marketing channels6 records
OnSIP product offering
Product offeringCore offering
OnSIP provides a cloud-based hosted VoIP business phone system that delivers voice, SMS/MMS, video calling, and conferencing through a unified platform accessible via browser, desktop, and mobile softphone apps. The service replaces on-site PBX hardware with a managed cloud PBX and includes advanced call center features, CRM integrations, and free Poly/Yealink desk phones for Unlimited plan subscribers. The offering is targeted at small and medium-sized businesses needing enterprise-grade telephony without legacy infrastructure.
Product overview
OnSIP is a hosted VoIP business phone system provider offering a unified cloud communications platform. The core offering is the OnSIP Hosted VoIP platform with voice, SMS/MMS, video calling, and conferencing capabilities. This is complemented by multi-platform softphone applications (Browser App, Desktop App, Mobile App) and a browser-based Admin Portal for account management. Add-on modules include Enhanced ACD Queues for call center operations, HD Conference Suites for audio conferencing, 5-Room Video Calling for video meetings, and OnSIP SMS/MMS for text messaging. For developers, OnSIP provides SIP.js, a JavaScript library for building WebRTC and real-time communications applications on top of the platform.
Differentiator
Problem solved
Functional benefit
Products and services
- OnSIP Hosted VoIP Cloud-based hosted PBX phone system providing voice, SMS/MMS, video calling, conferencing, and collaboration tools managed through a browser-based admin portal for SMB customers.
- OnSIP Browser App Web-based softphone accessible in Chrome, Firefox, or Opera browsers without requiring downloads or plugins, enabling business calls from any computer.
- OnSIP Desktop App Softphone application for Mac, Windows, and Linux computers offering full calling features and video conferencing capabilities.
- OnSIP Mobile App Softphone app for iOS and Android devices allowing users to make and receive work calls from their business extension with business caller ID.
- SIP.js JavaScript Library
Quantifiable outcome
- Trusted by over 150,000 businesses
- +4 more outcomes
Companies that use OnSIP
Customer profileNamed customers7 records
Segments4 records
Ideal customer profiles4 records
OnSIP technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration4 records
Feature4 records
OnSIP partnerships and signals
Strategic signalPartnerships
Six partnerships are on record, tiered core and supporting.
- HubSpotcoreCRM integration that displays caller's HubSpot record in the OnSIP app with a link to open the full record in a new tab. Enables sales and support teams to access customer data during calls.
- ZendeskcoreWhen an agent answers a call, a Zendesk ticket is automatically created, assigned to the agent, and populated with basic call info including unique ticket ID, timestamp, and phone numbers. Streamlines support ticket workflow.
- OdoocoreVoIP calling straight from the Odoo CRM & ERP dashboard with click-to-call ability and incoming call popup notifications. Enables seamless workflow for businesses using Odoo platform.
- SIP.jscoreOpen-source JavaScript SIP library created by OnSIP for WebRTC and SIP phone APIs. Enables developers to add real-time communications features to browser applications using just JavaScript.
- Poly (Polycom)supportingVoIP phone manufacturer whose devices are included free with OnSIP's Unlimited Plan. Poly and Yealink desk phones are provided to customers at no additional cost.
- YealinksupportingVoIP phone manufacturer whose devices are included free with OnSIP's Unlimited Plan. Poly and Yealink desk phones are provided to customers at no additional cost.
Scale indicators3 records
Recent moves6 records
Expansion highlights5 records
OnSIP competitors and assessment
Company assessmentDirect peers
- Zoom (Zoom Phone): Zoom Phone extends Zoom's video-first collaboration platform into cloud telephony with global PSTN coverage. Increasingly a direct VoIP competitor to OnSIP for businesses already standardized on Zoom for meetings.
- RingCentral: Public UCaaS leader offering cloud PBX, voice, messaging, and contact center solutions for SMBs and enterprises. Most direct comparable to OnSIP's hosted VoIP product, though RingCentral operates at significantly larger scale and includes broader collaboration features.
- 8x8: Public UCaaS and CCaaS provider delivering cloud voice, video, chat, and contact center services to SMB and mid-market customers. Direct competitor with overlapping SIP-based platform, contact center ACD capabilities, and CRM integrations.
- Dialpad: AI-powered UCaaS provider offering cloud voice, contact center, and sales coaching for SMB and mid-market. Direct competitor in hosted VoIP, differentiated by heavy AI investment that OnSIP currently lacks.
- Nextiva: Private UCaaS provider focused heavily on SMBs with bundled voice, collaboration, and CRM-like functionality. Closely comparable target market, pricing model, and feature scope to OnSIP's hosted VoIP offering.
- Ooma: Public cloud communications provider serving consumers, SMBs, and enterprises with hosted VoIP, including free phone hardware promotions similar to OnSIP's Unlimited plan. Direct SMB VoIP competitor with overlapping pricing tactics.
- GoTo (formerly Jive Communications): UCaaS and remote-access provider offering cloud phone systems, meetings, and contact center primarily for SMB and mid-market. Direct competitor to OnSIP with similar target buyer profile and VoIP-led product positioning.
Emerging players
- Twilio: Cloud communications platform primarily serving developers with programmable voice and messaging APIs. Comparable via shared SIP/WebRTC underpinnings and developer focus (analogous to OnSIP's SIP.js offering), though Twilio's primary model is API-driven rather than packaged SMB telephony.
Broad incumbents
- Microsoft (Teams Phone): Microsoft Teams Phone bundles telephony into the broader Microsoft 365 ecosystem, providing a powerful distribution channel into enterprises and SMBs already standardized on Microsoft. Represents both a competitor and a bundling threat to standalone VoIP providers like OnSIP.
- Vonage (Ericsson): Now owned by Ericsson, Vonage offers UCaaS and CPaaS APIs globally. Comparable to OnSIP in hosted VoIP for SMBs but with broader international footprint and developer/API ecosystem positioning.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks7 records
Key highlights7 records
Customer concentration
OnSIP social profiles
Digital presenceOnSIP compliance and trust
Trust signalCompliance1 record
OnSIP financial estimates
Financial estimateRevenue estimate
Valuation estimate
OnSIP leadership team
Management profileNumber of profiles
Profiles1 record
OnSIP funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
OnSIP 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 OnSIP
What does OnSIP do?
OnSIP provides a cloud-based hosted VoIP business phone system that delivers voice, SMS/MMS, video calling, and conferencing through a unified platform accessible via browser, desktop, and mobile softphone apps. The service replaces on-site PBX hardware with a managed cloud PBX and includes advanced call center features, CRM integrations, and free Poly/Yealink desk phones for Unlimited plan subscribers. The offering is targeted at small and medium-sized businesses needing enterprise-grade telephony without legacy infrastructure.
Is OnSIP a public or private company?
OnSIP is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was OnSIP founded?
OnSIP was founded in 2004. It employs 51 to 100 people.
Where is OnSIP based?
OnSIP is headquartered in New York, United States, in the North America region.
How does OnSIP make money?
Five revenue lines are on record. Subscription Plans (Basic and Unlimited) is the primary driver. The others are pay-As-You-Go, hardware Sales, phone Number Porting Services and international Dialing.
Who are OnSIP's main competitors?
Direct peers on record are Zoom (Zoom Phone), RingCentral, 8x8, Dialpad, Nextiva, Ooma and GoTo (formerly Jive Communications). Twilio is listed as an emerging player. Broad incumbents are Microsoft (Teams Phone) and Vonage (Ericsson).
Does OnSIP have an API?
Yes. OnSIP provides SIP.js, a JavaScript SIP library for WebRTC and real-time communications. The Open API Integration allows developers to add real-time communications to their apps. SIP.js uses a SIP-centric command structure and is tailored for WebRTC development. Developer documentation is at developer.onsip.com.
What industry is OnSIP in?
OnSIP's product category is Cloud Communications / Hosted VoIP. Its primary akta.pro industry code is HDAIAHAB, Cloud PBX & Hosted Telephony, with a secondary code of HDAIAHAD, VoIP Access & ITSP Services. Its NAICS code is 518 and its SIC code is 4813.