SafeToNet
SafeToNet is a UK-based AI company that develops HarmBlock, an on-device, privacy-preserving content detection technology deployed at the operating system level to protect children from explicit content across apps and encrypted environments, serving parents, OEM device manufacturers, and policymakers.
- Company typePrivate
- Founded2012
- HeadquartersReading, United Kingdom
- Headcount51–100
- GTM typeB2B and B2C
- OfferingSoftware
What SafeToNet does
SafeToNet Limited is a UK-based private company, founded in 2012 and headquartered in Reading, England, that develops HarmBlock AI — an on-device, privacy-preserving content detection and blocking technology deployed at the operating system level. The core product identifies and blocks explicit visual and textual content in real time across all applications and within end-to-end encrypted environments, processing data locally without collection, storage, or transmission of personal information, and claiming 98%+ detection accuracy. The technology stack includes proprietary neural network models for image, video, and text classification, augmented by the 2021 acquisition of Citadel Filters (a Canadian ML/AI company) and the 2018 acquisition of Visr.
SafeToNet operates a three-channel go-to-market: direct-to-consumer sales of HarmBlock-protected smartphones through harmblock.com, OEM/embedded licensing of the HarmBlock AI to device manufacturers (with Apple and Google explicitly named as targets following UK government regulatory pressure), and grant-funded development partnerships including the EU Commission-backed Protech/Salus project with the Internet Watch Foundation. The company also acquired Net Nanny (announced 2026) to consolidate consumer-facing parental control brand presence.
The company serves parents and guardians seeking device-level protection for children, OEM device manufacturers facing regulatory compliance mandates, and policymakers shaping online safety legislation. It claims operations spanning 130-136 countries with a headcount of 51-100 employees. Total disclosed private capital raised is approximately $16.3m, including a $13m Series A from West Hill Capital in 2018 and a £1.8m EU grant in 2023. Revenue mechanics blend hardware sales, licensing royalties, and project-based grants, with no publicly disclosed pricing tiers or ARR figures.
SafeToNet firmographics
Firmographics- Name
- SafeToNet
- Legal name
- SafeToNet Limited
- Website
- https://safetonet.com
- Company type
- Private
- Founded year
- 2012
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- SafeToNet is a UK-based AI company that develops HarmBlock, an on-device, privacy-preserving content detection technology deployed at the operating system level to protect children from explicit content across apps and encrypted environments, serving parents, OEM device manufacturers, and policymakers.
- Ownership category
- akta.pro rank
SafeToNet industry classification
Industry- Product category
- Online Child Safety Software
- NAICS
- Security Systems Services (56162)
- SIC
- Security & Commodity Brokers, Dealers, Exchanges & Services (6200)
- akta.pro primary industry
- Parental Controls, Content Filtering & Family Digital Safety for Smart Homes (HSAHAJAG)
- akta.pro secondary industry
- Content Moderation, Safe Messaging & Classroom Communication Safety (EDAFALAE)
Keywords
Where SafeToNet is headquartered
LocationHeadquarters
- HQ city
- Reading
- HQ country
- United Kingdom
- HQ region
- Europe
Offices1 record
Markets served
SafeToNet business model
Business model- GTM type
- B2B and B2C
- Offering type
- Software
- Cost components
- Technology or R&D
Revenue model
- HarmBlock Protected Devices: Sale of smartphones and devices pre-equipped with HarmBlock technology. Parents purchase devices with built-in protection already integrated at the OS level.
- OEM Technology Licensing: Licensing HarmBlock AI technology to device manufacturers (OEMs) for integration into their devices' operating systems. Targets Apple, Google, and other supply chain companies as identified in UK government mandates.
- Protech/Salus Project: EU-funded development project (Proteck) creating the Salus app with £1.8m EU funding, involving collaboration with the Internet Watch Foundation for child sexual abuse content detection.
Go-to-market motion3 records
Distribution channels3 records
Marketing channels4 records
SafeToNet product offering
Product offeringCore offering
SafeToNet develops HarmBlock AI, an on-device, privacy-preserving content detection and blocking technology that operates at the operating system level to prevent children from seeing, filming, or sharing explicit content in real time across all apps and end-to-end-encrypted environments. The company sells HarmBlock through two primary channels: licensing the technology to device manufacturers (OEMs) for OS-level integration, and direct-to-consumer sales of HarmBlock-protected smartphones via harmblock.com.
Product overview
SafeToNet offers a unified product ecosystem centered on HarmBlock, their core AI-powered safeguarding technology embedded at the operating system level. HarmBlock prevents children from seeing, filming, or sharing explicit content in real-time across all apps and platforms, operating on-device with privacy-centric processing. The portfolio includes the original SafeToNet app and was enhanced through the 2021 acquisition of Citadel Filters, a Canadian neural network company specializing in content filtering for images, videos, and text. SafeToNet is also participating in the EU-funded Salus initiative alongside the Internet Watch Foundation to develop a dedicated online safety application for detecting child sexual abuse material.
Differentiator
Problem solved
Functional benefit
Brands
- HarmBlock: AI technology that safeguards smart devices, platforms, and apps by preventing the filming, viewing, and sharing of explicit content in real time. HarmBlock can be deployed in the Operating System for real-time on-device protection including within end-to-end-encrypted environments. Claimed accuracy of 98%+ for on-device detection.
Products and services
- HarmBlock AI AI-powered safeguarding technology deployed at the operating system level that prevents children from seeing, filming, or sharing explicit content in real-time across all apps and platforms, including end-to-end-encrypted environments. Features on-device, privacy-centric processing with 98%+ detection accuracy. Targeted at device manufacturers (OEMs) for OS-level integration and to parents via protected devices.
- HarmBlock Protected Smartphones Smartphones pre-equipped with HarmBlock AI technology integrated at the operating system level, sold directly to parents and guardians who want built-in protection from explicit content for their children.
- Salus App Online safety application under development by SafeToNet and the Internet Watch Foundation, using machine learning to detect child sexual abuse content and prevent access through real-time detection on users' devices. Funded by the European Commission under the Protech project.
- SafeToNet App Mobile application providing online child safeguarding functionality, part of the broader SafeToNet ecosystem of smart device protection.
- Net Nanny Parental control software acquired by SafeToNet, providing online child protection functionality as a wholly-owned subsidiary brand in the SafeToNet portfolio.
Quantifiable outcome
- 98%+ accuracy in nude content detection on-device
- +3 more outcomes
Companies that use SafeToNet
Customer profileNamed customers1 record
Segments3 records
Ideal customer profiles3 records
SafeToNet technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
AI capability6 records
Feature4 records
SafeToNet partnerships and signals
Strategic signalPartnerships
Two partnerships are on record, tiered core.
- Internet Watch Foundation (IWF)coreThe IWF, a UK-based charity combatting child sexual abuse material online, is collaborating with SafeToNet on the Protech project to develop the Salus app. The project, funded by the European Commission with £1.8m, aims to detect child sexual abuse content using machine learning and prevent access to such material on users' devices.
- Citadel FilterscoreSafeToNet acquired Citadel Filters, a Canadian neural network and machine learning company specializing in content filtering across images, videos, and text. This acquisition enhanced SafeToNet's online child safeguarding technology, particularly for Windows platforms and multiple languages, expanding its global reach.
Scale indicators4 records
Recent moves6 records
Expansion highlights5 records
SafeToNet competitors and assessment
Company assessmentDirect peers
- Qustodio: Direct competitor in parental control software serving parents globally across devices. Qustodio was named alongside SafeToNet as a key player in the global parental control market and has raised significant growth capital, making it a primary head-to-head rival for both SaaS subscriptions and OEM/regulatory deals.
- Bark Technologies: Direct peer in child online safety monitoring, using AI to detect harmful content across texts, social media, and email for parents and schools. Bark overlaps with SafeToNet's content-detection mission and competes for the same school/district and parent-customer segments.
- Net Nanny (now SafeToNet subsidiary): Legacy parental control software brand acquired by SafeToNet. Listed as a peer because it remains a recognized independent brand in the category and historically competed with SafeToNet on the same parent buyer; integration plans versus standalone operations are not disclosed.
Broad incumbents
- NortonLifeLock / Gen Digital: Large incumbent in consumer cybersecurity and parental controls (Norton Family, acquired Avira/Avast). Operates as a broad portfolio player with overlapping family-safety features embedded in multi-product security suites, competing with SafeToNet on installed base and OEM bundling despite not specializing in child online safety.
- Kaspersky Safe Kids: Broad incumbent offering parental controls as part of a wider cybersecurity portfolio. Competes with SafeToNet on cross-platform content filtering and parental dashboards but is not specialized in child online safeguarding.
- Google Family Link: Google's free parental control offering for Android and ChromeOS devices. A direct substitute for SafeToNet's consumer product and the most likely in-house response if the UK mandate forces Google to add system-level child safety, posing both a competitive and partnership decision for SafeToNet.
- Apple Screen Time / Communication Safety: Apple's built-in parental controls and on-device CSAM/explicit-image detection (Communication Safety, Sensitive Content Warning). The single largest potential OEM competitor: if Apple extends these features to meet UK/EU mandates without licensing, the OEM-licensing thesis for SafeToNet weakens materially.
- McAfee Safe Family: Parental control offering bundled within McAfee's broader consumer security suite. Competes with SafeToNet on cross-device family safety but as part of a wider security portfolio rather than a focused child-safety specialist.
Emerging players
- Aura (formerly Circle Media): Digital safety company combining parental controls, identity protection, and VPN. Following its acquisition of Circle, Aura targets the same family-safety buyer with a broader feature stack, positioning itself as an emerging all-in-one alternative to SafeToNet's specialist offering.
- Canopy (parental control): AI-driven parental control app using on-device and cloud ML to detect sexting, CSAM exposure, and explicit content on children's phones. Closely comparable to SafeToNet's AI-on-device detection model and targets the same parent-and-school segment.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
SafeToNet social profiles
Digital presenceSafeToNet financial estimates
Financial estimateRevenue estimate
Valuation estimate
SafeToNet leadership team
Management profileNumber of profiles
Profiles7 records
SafeToNet subsidiaries and ownership
Company hierarchySubsidiaries2 records
SafeToNet funding detail
Funding detailFunding overview
Funding rounds6 records
Investors7 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
SafeToNet M&A and investment
M&A and investmentM&A3 records
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about SafeToNet
What does SafeToNet do?
SafeToNet develops HarmBlock AI, an on-device, privacy-preserving content detection and blocking technology that operates at the operating system level to prevent children from seeing, filming, or sharing explicit content in real time across all apps and end-to-end-encrypted environments. The company sells HarmBlock through two primary channels: licensing the technology to device manufacturers (OEMs) for OS-level integration, and direct-to-consumer sales of HarmBlock-protected smartphones via harmblock.com.
Is SafeToNet a public or private company?
SafeToNet is a private company. It is classified as venture growth investor backed and is currently operating.
When was SafeToNet founded?
SafeToNet was founded in 2012. It employs 51 to 100 people.
Where is SafeToNet based?
SafeToNet is headquartered in Reading, United Kingdom, in the Europe region.
How does SafeToNet make money?
Three revenue lines are on record. HarmBlock Protected Devices are the primary driver. The others are OEM Technology Licensing and protech/Salus Project.
Who are SafeToNet's main competitors?
Direct peers on record are Qustodio, Bark Technologies and Net Nanny (now SafeToNet subsidiary). Broad incumbents are NortonLifeLock / Gen Digital, Kaspersky Safe Kids, Google Family Link, Apple Screen Time / Communication Safety and McAfee Safe Family. Emerging players are Aura (formerly Circle Media) and Canopy (parental control).
Does SafeToNet have an API?
No public API is recorded for SafeToNet.
What industry is SafeToNet in?
SafeToNet's product category is Online Child Safety Software. Its primary akta.pro industry code is HSAHAJAG, Parental Controls, Content Filtering & Family Digital Safety for Smart Homes, with a secondary code of EDAFALAE, Content Moderation, Safe Messaging & Classroom Communication Safety. Its NAICS code is 56162 and its SIC code is 6200.