Voice Firewall

Name: Voice Firewall
Brand: Mobileum

Voice Firewall is a telecom network security solution that detects and blocks fraudulent and unwanted voice traffic in real time using analytics-driven detection and enforcement mechanisms, and supports STIR/SHAKEN caller-authentication workflows.

Est 2001|Valuation $915M|Raised $857M

LinkedIn 132K|Website|FTEs 1,800

MarketsFirewalls Fraud Detection

01Competitive Landscape

Competitive Landscape

| Aspect | Mobileum Voice Firewall | Cellusys Voice Firewall | SBC-centric approach (e.g., Cisco CUBE/SBC) | |--------|--------------------------|-------------------------|--------------------------------------------| | Starting Price | Not publicly listed (quote-based) | Not publicly listed (quote-based) | Varies widely (capex/licensing + services) | | Designed For | CSPs requiring analytics and enforcement for voice fraud/spam and STIR/SHAKEN support | Operators seeking a product explicitly marketed as a "Voice Firewall" within a fraud and signaling security portfolio | SIP perimeter control, interconnect SBC functions, VoIP/VoLTE session security; commonly used for session management and basic filtering | | Key Strength | Vendor materials emphasize integration of analytics with policy enforcement as part of a broader security and analytics suite | Clear product-line messaging including voice firewall and multi-protocol security portfolio | Deep SIP/SBC controls; well-understood architecture; strong interoperability patterns | | Key Weakness | Limited public third-party reviews and limited public pricing disclosures; outcomes are difficult to validate independently | Enterprise challenges include tuning, false positives, and cost; independent proof varies | Community notes that improper configuration can cause VoIP breakage; not purpose-built as a fraud/spam analytics layer | - Direct competitors and their key differentiators - Cellusys positions a named "Voice Firewall" product within its fraud and signaling security set and cites detection/prevention of CLI spoofing and IRSF. - Vendor product overview and feature pages - Feature comparison: where this product appears to excel vs lag - Potential advantages for Mobileum (based on vendor materials, not independently validated): - Integration of analytics functions with enforcement mechanisms - Support for STIR/SHAKEN workflows and caller-authentication-related controls - Potential disadvantages / buyer concerns: - Limited public independent proof points (few accessible third-party reviews) - Unclear public documentation on data residency, identity provisioning integrations (SSO/SCIM), and audit log capabilities - Pricing comparison: value proposition vs alternatives - Mobileum and Cellusys both use quote-based pricing in public-facing materials; SBC approaches may be less expensive if already deployed but may not address large-scale fraud analytics and robocall mitigation needs. - Customer testimonials comparing this product to competitors - Not available in accessible sources. - Market share and adoption trends - Mobileum publishes a vendor claim of serving a large number of network operators; this is a company-level metric and not specific to the Voice Firewall product and should be validated as part of vendor due diligence. - Company blog posts and product materials - When customers choose competitors instead (and why) - Common decision logic in this category includes: - Choosing SBC-first architectures when session control and SIP interoperability are the primary needs rather than specialized fraud/spam analytics - Choosing vendors with stronger regional references, managed service capabilities, or more transparent compliance documentation

01Competitive Landscape

Competitive Landscape

Aspect	Mobileum Voice Firewall	Cellusys Voice Firewall	SBC-centric approach (e.g., Cisco CUBE/SBC)
Starting Price	Not publicly listed (quote-based)	Not publicly listed (quote-based)	Varies widely (capex/licensing + services)
Designed For	CSPs requiring analytics and enforcement for voice fraud/spam and STIR/SHAKEN support	Operators seeking a product explicitly marketed as a "Voice Firewall" within a fraud and signaling security portfolio	SIP perimeter control, interconnect SBC functions, VoIP/VoLTE session security; commonly used for session management and basic filtering
Key Strength	Vendor materials emphasize integration of analytics with policy enforcement as part of a broader security and analytics suite	Clear product-line messaging including voice firewall and multi-protocol security portfolio	Deep SIP/SBC controls; well-understood architecture; strong interoperability patterns
Key Weakness	Limited public third-party reviews and limited public pricing disclosures; outcomes are difficult to validate independently	Enterprise challenges include tuning, false positives, and cost; independent proof varies	Community notes that improper configuration can cause VoIP breakage; not purpose-built as a fraud/spam analytics layer

Direct competitors and their key differentiators
- Cellusys positions a named "Voice Firewall" product within its fraud and signaling security set and cites detection/prevention of CLI spoofing and IRSF.
  - Vendor product overview and feature pages
Feature comparison: where this product appears to excel vs lag
- Potential advantages for Mobileum (based on vendor materials, not independently validated):
  - Integration of analytics functions with enforcement mechanisms
  - Support for STIR/SHAKEN workflows and caller-authentication-related controls
- Potential disadvantages / buyer concerns:
  - Limited public independent proof points (few accessible third-party reviews)
  - Unclear public documentation on data residency, identity provisioning integrations (SSO/SCIM), and audit log capabilities
Pricing comparison: value proposition vs alternatives
- Mobileum and Cellusys both use quote-based pricing in public-facing materials; SBC approaches may be less expensive if already deployed but may not address large-scale fraud analytics and robocall mitigation needs.
Customer testimonials comparing this product to competitors
- Not available in accessible sources.
Market share and adoption trends
- Mobileum publishes a vendor claim of serving a large number of network operators; this is a company-level metric and not specific to the Voice Firewall product and should be validated as part of vendor due diligence.
  - Company blog posts and product materials
When customers choose competitors instead (and why)
- Common decision logic in this category includes:
  - Choosing SBC-first architectures when session control and SIP interoperability are the primary needs rather than specialized fraud/spam analytics
  - Choosing vendors with stronger regional references, managed service capabilities, or more transparent compliance documentation

Aspect

Mobileum Voice Firewall

Cellusys Voice Firewall

SBC-centric approach (e.g., Cisco CUBE/SBC)

Starting Price

Not publicly listed (quote-based)

Varies widely (capex/licensing + services)

Designed For

CSPs requiring analytics and enforcement for voice fraud/spam and STIR/SHAKEN support

Operators seeking a product explicitly marketed as a "Voice Firewall" within a fraud and signaling security portfolio

SIP perimeter control, interconnect SBC functions, VoIP/VoLTE session security; commonly used for session management and basic filtering

Key Strength

Vendor materials emphasize integration of analytics with policy enforcement as part of a broader security and analytics suite

Clear product-line messaging including voice firewall and multi-protocol security portfolio

Deep SIP/SBC controls; well-understood architecture; strong interoperability patterns

Key Weakness

Limited public third-party reviews and limited public pricing disclosures; outcomes are difficult to validate independently

Enterprise challenges include tuning, false positives, and cost; independent proof varies

Community notes that improper configuration can cause VoIP breakage; not purpose-built as a fraud/spam analytics layer