SIP Forum
SIP Forum is a US-based industry association (est. 2000) that develops SIP technical recommendations, hosts the SIPit interoperability testing events and SIPNOC annual conference, and serves telecom providers, equipment manufacturers, regulators, and academic institutions.
- Company typePrivate
- Founded2000
- HeadquartersNorth Andover, United States
- Headcount1–10
- GTM typeB2B
- OfferingServices
What SIP Forum does
SIP Forum is a US-based industry association (organized as SIP Forum LLC, founded 2000) that advances the adoption and interoperability of the Session Initiation Protocol (SIP) for real-time IP communications. It serves telecommunications service providers, backbone operators and ISPs, IP communications equipment manufacturers, SIP application developers, government regulators (including the FCC), and academic institutions. Its core deliverables are technical standards and recommendations (SIPconnect 1.1/2.0 for SIP trunking; the STIR/SHAKEN Call Authentication Framework co-developed with ATIS; the Robocall Call Blocking Notification standard ATIS-1000099; the in-development ALIII standard for All-IP interconnection) and a portfolio of community programs including SIPit interoperability testing events (32+ hosted globally), the annual SIPNOC conference (15th edition in 2026), and specialized summits on STIR/SHAKEN, KYC, AI, and Branded Calling.
The organization operates a community-led go-to-market model: Individual Participant and Academic/Institutional membership is free, while Full (corporate) Members pay annual dues to fund administration. Revenue is generated by those recurring Full Membership dues and by registration fees for SIPNOC, SIPit, and the four virtual summits. Notable Full Members span Tier-1 US carriers (Verizon, AT&T, Comcast, Cox), communications platforms (Bandwidth, Twilio, Telnyx), technology companies (Microsoft, Google), and identity/registry providers (TransUnion, iconectiv, Somos). Day-to-day operations are run by Managing Director Marc Robins, with a Board of Directors (7-15 seats, up to 7 reserved for Participant Members) elected from Full Member companies.
SIP Forum firmographics
Firmographics- Name
- SIP Forum
- Legal name
- SIP Forum LLC
- Website
- https://sipforum.org
- Company type
- Private
- Founded year
- 2000
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- SIP Forum is a US-based industry association (est. 2000) that develops SIP technical recommendations, hosts the SIPit interoperability testing events and SIPNOC annual conference, and serves telecom providers, equipment manufacturers, regulators, and academic institutions.
- Ownership category
- akta.pro rank
SIP Forum industry classification
Industry- Product category
- Telecommunications Industry Association / SIP Standards Development
- NAICS
- Business Associations (813910)
- SIC
- Services-Membership Organizations (8600)
- akta.pro primary industry
- SIP Trunking & Voice Termination (HDAIAHAC)
- akta.pro secondary industry
- Partner, Channel & Alliance Summits (THAHAMAC)
Keywords
Where SIP Forum is headquartered
LocationHeadquarters
- HQ city
- North Andover
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
SIP Forum business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure, Others
Revenue model
- Full Membership Dues: Corporate Full Members pay annual membership dues to cover the administration costs of the Forum. Individual Participant and Academic/Institutional membership is free.
- Event Registration Fees: The SIP Forum generates revenue through registration fees for its conferences including SIPNOC (annual SIP Network Operators Conference), STIR/SHAKEN SUMMIT, KYC SUMMIT, AI SUMMIT, and BRANDED CALLING SUMMIT, as well as SIPit interoperability testing events.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Freemium | Others | Participant (Individual) Membership - Free |
| Freemium | Others | Academic/Institutional Membership - Free |
| Subscription | Annual | Full (Corporate) Membership - Annual Fee |
Go-to-market motion1 record
Distribution channels3 records
Marketing channels8 records
SIP Forum product offering
Product offeringCore offering
The SIP Forum is an industry association that develops and promotes technical standards, recommendations, and interoperability testing programs for the Session Initiation Protocol (SIP). It delivers its mission through member-driven Working Groups, technical recommendations (SIPconnect), joint frameworks (STIR/SHAKEN with ATIS), live interoperability testing events (SIPit), and the annual SIPNOC conference series along with specialized summits on call authentication, branded calling, AI, and KYC.
Product overview
The SIP Forum is an industry association that serves as the central hub for advancing Session Initiation Protocol (SIP) technology through multiple interconnected programs. The organization's offerings include SIPNOC, the premier annual conference for SIP network operators now in its 15th year; SIPit, the world's leading SIP interoperability testing events; SIPconnect, a technical recommendation with an associated certification testing program for SIP trunking; and the STIR/SHAKEN Call Authentication Framework developed jointly with ATIS to combat robocalls. Additionally, the Forum hosts several specialized summits including the BRANDED CALLING SUMMIT, AI SUMMIT, and KYC SUMMIT. The Forum is not a product company but rather a standards development and industry coordination organization.
Differentiator
Problem solved
Functional benefit
Products and services
- SIPNOC (SIP Network Operators Conference)
- SIPit Interoperability Testing Events
- SIPconnect Technical Recommendation
- STIR/SHAKEN Call Authentication Framework
- SIPconnect Certification Testing Program
- BRANDED CALLING SUMMIT
- AI SUMMIT
- KYC SUMMIT
- Robocall Call Blocking Notification Standard (ATIS-1000099)
Quantifiable outcome
- 32+ SIPit interoperability testing events hosted globally
- +2 more outcomes
Companies that use SIP Forum
Customer profileNamed customers6 records
Segments5 records
Ideal customer profiles3 records
SIP Forum technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
SIP Forum partnerships and signals
Strategic signalPartnerships
Five partnerships are on record, tiered core.
- University of New Hampshire Interoperability Laboratory (UNH-IOL)coreUNH-IOL hosted SIPit 33, a five-day virtual SIP interoperability testing event in December 2021. UNH-IOL provides the testing infrastructure for SIP Forum's interoperability testing events, enabling vendors and service providers to test SIP implementation interoperability.
- BITKOMcoreBITKOM, the Federal Association for Information Technology, Telecommunications and New Media in Germany, partnered with the SIP Forum in the ongoing development of SIPconnect. BITKOM provides valuable technical input and peer review as one of the EU's most prominent technical associations, helping ensure SIPconnect meets requirements of European members.
- ATIS (Alliance for Telecommunications Industry Solutions)coreThe SIP Forum has a formal joint agreement with ATIS, the Alliance for Telecommunications Industry Solutions. Together they developed the STIR/SHAKEN Call Authentication Framework and maintain the ATIS/SIP Forum Joint IP-NNI Task Force. The partnership also produced the Robocall Call Blocking Notification standard (ATIS-1000099).
- IETF (Internet Engineering Task Force)coreThe IETF defines the core SIP protocol. The SIP Forum collaborates with IETF on standards work, with Forum members contributing to IETF working groups including SIP, STIR, and other relevant specifications. The Forum's activities complement IETF's core protocol definitions.
- FCC (Federal Communications Commission)coreThe SIP Forum works closely with the FCC on regulatory matters related to caller ID authentication and STIR/SHAKEN deployment. Forum members participate in FCC advisory councils including CSRIC. The TRACED Act and FCC STIR/SHAKEN mandates were informed by Forum-ATIS collaboration.
Scale indicators5 records
Recent moves6 records
Expansion highlights5 records
SIP Forum competitors and assessment
Company assessmentDirect peers
- ATIS (Alliance for Telecommunications Industry Solutions): The Forum's primary joint-standards partner; together they developed STIR/SHAKEN and operate the Joint IP-NNI Task Force. ATIS operates the same standards-and-committee model across telecom with formal industry solutions and FCC-facing output.
- i3forum: International industry forum for IP-based communications interoperability, with overlapping working groups on SIP interconnection, numbering, and anti-fraud. A natural peer for the SIP Forum on international carrier-grade SIP standards.
Broad incumbents
- IETF (Internet Engineering Task Force): The core standards body that defines the SIP protocol itself, along with STIR and related RFCs. The SIP Forum explicitly complements IETF output, making IETF the upstream peer whose specifications the Forum profiles.
- 3GPP: Drives IMS and SIP-based voice in mobile networks (VoLTE/VoNR). Any service provider running SIP at scale participates in 3GPP, making it the largest institutional peer the Forum overlaps with in operator deployments.
- ETSI (European Telecommunications Standards Institute): European counterpart producing telecom standards including SIP-related specifications (e.g., NG112, RCS). Often cited alongside the Forum for international harmonization of IP communications standards.
- ITU (International Telecommunication Union): United Nations-affiliated telecom standards body with overlapping scope on IP interconnection, numbering, and anti-fraud initiatives. Relevant for any international SIP/caller-ID harmonization work the Forum participates in.
- GSMA: Global mobile operator association driving interconnection, identity, and anti-fraud initiatives (including STIR/SHAKEN adoption via joint ATIS/GSMA work). Sets operator-level policy that influences Forum member implementation timelines.
Emerging players
- Communications Fraud Control Association (CFCA): Industry association focused on communications fraud prevention and loss reporting. CFCA's remit overlaps the Forum's robocall mitigation and caller-ID authentication mission, serving a similar operator fraud/risk audience.
- VoIP Council (Voice Over IP Council): Trade association specifically promoting VoIP/SIP adoption among enterprises and service providers. Smaller remit than the SIP Forum but directly comparable as a SIP/VoIP-focused industry body.
- Trusted Communications Alliance: Industry alliance focused on trusted caller ID and branded communications, often co-publishing guidance alongside STIR/SHAKEN rollouts. Operates as a peer forum for branded-calling and Rich Call Data deployments.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat5 records
Key risks5 records
Key highlights6 records
Customer concentration
SIP Forum social profiles
Digital presenceSIP Forum financial estimates
Financial estimateRevenue estimate
Valuation estimate
SIP Forum leadership team
Management profileNumber of profiles
Profiles1 record
SIP Forum funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
SIP Forum 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 SIP Forum
What does SIP Forum do?
The SIP Forum is an industry association that develops and promotes technical standards, recommendations, and interoperability testing programs for the Session Initiation Protocol (SIP). It delivers its mission through member-driven Working Groups, technical recommendations (SIPconnect), joint frameworks (STIR/SHAKEN with ATIS), live interoperability testing events (SIPit), and the annual SIPNOC conference series along with specialized summits on call authentication, branded calling, AI, and KYC.
Is SIP Forum a public or private company?
SIP Forum is a private company. It is classified as nonprofit foundation owned and is currently operating.
When was SIP Forum founded?
SIP Forum was founded in 2000. It employs 1 to 10 people.
Where is SIP Forum based?
SIP Forum is headquartered in North Andover, United States, in the North America region.
How does SIP Forum make money?
Two revenue lines are on record. Full Membership Dues are the primary driver. The others are event Registration Fees.
Who are SIP Forum's main competitors?
Direct peers on record are ATIS (Alliance for Telecommunications Industry Solutions) and i3forum. Broad incumbents are IETF (Internet Engineering Task Force), 3GPP, ETSI (European Telecommunications Standards Institute), ITU (International Telecommunication Union) and GSMA. Emerging players are Communications Fraud Control Association (CFCA), VoIP Council (Voice Over IP Council) and Trusted Communications Alliance.
Does SIP Forum have an API?
No public API is recorded for SIP Forum.
What industry is SIP Forum in?
SIP Forum's product category is Telecommunications Industry Association / SIP Standards Development. Its primary akta.pro industry code is HDAIAHAC, SIP Trunking & Voice Termination, with a secondary code of THAHAMAC, Partner, Channel & Alliance Summits. Its NAICS code is 813910 and its SIC code is 8600.