Witness Chain

Blockchain Verification Infrastructure (DePIN)witnesschain.com

Witness Chain operates the InfinityWatch Network, a decentralized watchtower platform providing EigenLayer-secured cryptographic verification of location, bandwidth, and images for DePIN protocols, autonomous AI systems, application developers, and DeFi protocols across 60+ countries.

Company typePrivate
Founded2023
HeadquartersPrinceton, United States
Headcount11–50
GTM typeB2B
OfferingSoftware

What Witness Chain does

Witness Chain is a Princeton-based, venture-backed private company operating the InfinityWatch Network, a layer of decentralized watchtowers that observe, verify, and transform real-world events into cryptographically trusted digital proofs. Founded in 2022 and having reached mainnet in 2024, the company offers three core verification products: Proof of Location (a Byzantine-fortified protocol that validates the geolocation of Internet-connected devices using latency-based triangulation), Proof of Bandwidth (a decentralized speed-test protocol for verifying backhaul capacity claims), and Image Verification (a decentralized service for authenticating visual content). The network is secured by EigenLayer's restaking mechanism, with $10B+ in staked assets protecting AVS-level operations, and the company positions its products for DePIN protocols, autonomous AI systems, application developers, DeFi protocols, and node operators across 60+ countries.

The company distributes its services through an API-first go-to-market model, exposing REST endpoints for location and bandwidth challenges, campaign management, and authentication via Ethereum or Solana wallets. Witness Chain operates a documented developer ecosystem (GitBook documentation, GitHub sample code, community channels) and ships supporting applications including the Infinitywatch Explorer, the Campaign Mobile App (Google Play and App Store), and the Campaign Management App. It maintains strategic alliances with EigenLayer, Polygon, Filecoin, Akash, Sentient, and Predicate Network, and is backed by Polychain Capital, Ethereal Ventures, Robot Ventures, Frontiers Capital, and dao5. Co-founder Pramod Viswanath leads the organization.

Witness Chain's revenue mechanics are not publicly disclosed; the platform operates a usage-based API access model in principle, but no pricing schedule, enterprise contracts, ARR figures, or transaction fees are detailed in available materials. The company was founded with 11–50 employees and runs a horizontal, multi-segment segmentation strategy targeting five distinct use-case segments without anchor enterprise customers, indicating a long-tail, ecosystem-driven revenue posture rather than a concentrated enterprise sales motion.

Witness Chain firmographics

Firmographics

Name: Witness Chain
Legal name: Witness Chain
Website: https://witnesschain.com
Company type: Private
Founded year: 2023
Operating status: Operating
Headcount range: 11–50 employees
Short description: Witness Chain operates the InfinityWatch Network, a decentralized watchtower platform providing EigenLayer-secured cryptographic verification of location, bandwidth, and images for DePIN protocols, autonomous AI systems, application developers, and DeFi protocols across 60+ countries.
Ownership category
akta.pro rank

Witness Chain industry classification

Industry

Product category: Blockchain Verification Infrastructure (DePIN)
NAICS: Financial Transactions Processing, Reserve, and Clearinghouse Activities (522320)
SIC: Finance Services (6199)
akta.pro primary industry: RWA Oracles, Data Attestation & Proof-of-Reserve/Proof-of-Collateral (FSADAEAM)
akta.pro secondary industries: Protocol Security, Monitoring & Risk Tooling (audits, formal verification, analytics) (FSAPAAAL), Monitoring, Observability & Incident Response (alerts, traces, runtime monitoring) (FSAPABAJ), Interoperability Monitoring, Analytics & Compliance (bridge risk scoring, forensics, alerts) (FSAPAKAJ)

Keywords

Decentralized verification network
Proof of location
Proof of bandwidth
DePIN infrastructure
EigenLayer AVS

Where Witness Chain is headquartered

Location

Headquarters

HQ city: Princeton
HQ country: United States
HQ region: North America

Markets served

Witness Chain business model

Business model

GTM type: B2B
Offering type: Software
Cost components: Technology or R&D, Personnel, Infrastructure, Marketing or Sales, Operations

Revenue model

API Access Fees: Witness Chain provides APIs for location, bandwidth, and image verification that developers integrate into their applications. The platform likely monetizes through API usage fees based on verification requests.

Go-to-market motion1 record

Distribution channels5 records

Marketing channels5 records

Witness Chain product offering

Product offering

Core offering

Witness Chain builds and operates the InfinityWatch Network, a decentralized layer of watchtowers that delivers cryptographic verification of real-world events as APIs. Its three core services are Proof of Location (geolocation validated via Internet-delay triangulation using the BFT-PoLoc protocol), Proof of Bandwidth (decentralized backhaul speed testing), and Image Verification (decentralized authentication of visual content). The platform exposes these capabilities through REST APIs and supporting apps for developers, DePIN protocols, and node operators.

Product overview

Witness Chain is building the InfinityWatch Network — a decentralized platform providing EigenLayer-secured verifiable APIs for location, bandwidth, and image verification. The core platform consists of three main verification products: Proof of Location (PoL), a decentralized BFT protocol validating geographical locations of Internet-connected devices using internet delay measurements; Proof of Bandwidth (PoB), a decentralized speed-test protocol; and Image Verification, a decentralized service for authenticating visual content. Supporting the core are Watchtower Nodes (run by participants via Go-based Docker clients or mobile apps) that submit cryptographic proofs on-chain. Users interact with the platform through the Infinitywatch Explorer (network monitoring dashboard), the Campaign Mobile App (photo-capture for campaigns), and the Campaign Management App (campaign creation and analytics). Developers integrate via the Campaign APIs (for photo-campaign management) and Challenge APIs (for submitting/probing location/bandwidth challenges), backed by Authentication APIs supporting Ethereum and Solana wallet signing.

Differentiator

Problem solved

Functional benefit

Brands

InfinityWatch: The InfinityWatch Network is a layer of decentralized watchtowers designed to observe, verify, and transform real-world events into trusted digital proofs. Powers Proof of Location, Proof of Bandwidth, and Proof of Image verification services.
Proof of Location (PoL)
Proof of Bandwidth (PoB)
Infinitywatch Explorer
Campaign Mobile App
Campaign Management App

Products and services

InfinityWatch Network A decentralized network of watchtowers that observe, verify, and transform real-world events into trusted digital proofs. Operates on the principle of Proof of Location, enabling trust in space and time and serving as a coordination layer for verifiable physical-world actions. Lives on mainnet and is secured by EigenLayer.
Proof of Location A decentralized Byzantine-Fault-Tolerant proof of geolocation that validates the geographical location of prover devices connected to the Internet using Internet delay measurements. Participation and challenging are permissionless.
Proof of Bandwidth A decentralized speed-test protocol enabling payers to determine the backhaul capacity of provers with the help of a pool of challengers who send challenge traffic to the prover.
Image Verification A decentralized service to authenticate and verify the integrity of images and visual content, enabling trust in visual evidence submitted to the network.
InfinityWatch Explorer A decentralized network explorer for verifying real-world events into trusted digital proofs. Monitors stakes, watchtowers, and challengers participating in Proof of Location validation. Reports on 6,000+ watchtowers, 60+ countries, 100+ cities, 100,000+ challenges, and $10B+ in staked assets.
Campaign Mobile App A mobile application enabling participants to submit witness evidence through photo capture for verification campaigns and earn rewards for contributing to decentralized physical-world verification. Available on Google Play and App Store.
Campaign Management App An application for creating, deploying, and managing verification campaigns with configurable validation parameters, participation monitoring, and comprehensive analytics.
Campaign APIs HTTP API suite for creating and managing geo-verified photo-capture campaigns, including endpoints for campaign creation, editing, photo feed retrieval, and campaign listing. Supports geofenced campaigns with location verification and a reward system.
Challenge APIs HTTP API for programmatically querying watchtower/prover data, submitting and managing location and bandwidth challenges. Includes challenge request, challenge status monitoring, and prover information endpoints.
Authentication APIs Two-step authentication API using pre-login and login flows. Users sign messages with Ethereum or Solana wallet private keys (MetaMask/Phantom) to obtain session cookies for subsequent API access.

Quantifiable outcome

6000+ watchtowers globally verifying real-world events
+2 more outcomes

Companies that use Witness Chain

Customer profile

Segments5 records

Ideal customer profiles4 records

Witness Chain technology and API

Technology

Technology focussed Yes

API detail

Has API: Yes
API docs
API detail

Core technology

AI maturity

App detail

AI capability4 records

Feature6 records

Witness Chain partnerships and signals

Strategic signal

Partnerships

Three partnerships are on record, tiered core.

EigenLayercoreTechnology or IntegrationEigenLayer is a foundational ecosystem partner providing the restaking security infrastructure for Witness Chain's verification protocols. Witness Chain operates as an Actively Validated Service (AVS) on EigenLayer, with $10B+ in staked assets securing the network. The partnership enables cryptographically secure verification of real-world data through Ethereum's crypto-economic trust.
PolygoncoreTechnology or IntegrationPolygon is an ecosystem partner in the Witness Chain verification network, providing infrastructure integration for the platform's location and bandwidth verification services.
PredicatecoreTechnology or IntegrationPredicate is a strategic partner enabling developers to integrate geolocation requirements for transactions using Witness Chain's proof of location. Through Predicate, developers can add location-based access policies to smart contracts for decentralized applications, providing geofencing for DeFi protocols, fair incentive distribution, and prevention of farming/sniping during airdrops and token launches.

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Witness Chain competitors and assessment

Company assessment

Market position

Competitive moat5 records

Key highlights7 records

Customer concentration

Witness Chain financial estimates

Financial estimate

Revenue estimate

Valuation estimate

Witness Chain leadership team

Management profile

Number of profiles

Profiles1 record

Witness Chain funding detail

Funding detail

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

Witness Chain M&A and investment

M&A and investment

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Witness Chain

What does Witness Chain do?

Is Witness Chain a public or private company?

Witness Chain is a private company. It is classified as venture growth investor backed and is currently operating.

When was Witness Chain founded?

Witness Chain was founded in 2023. It employs 11 to 50 people.

Where is Witness Chain based?

Witness Chain is headquartered in Princeton, United States, in the North America region.

How does Witness Chain make money?

One revenue line is on record: API Access Fees.

Does Witness Chain have an API?

Yes. Witness Chain provides an HTTP-based API suite enabling developers to programmatically query watchtower/prover data, submit and manage location/bandwidth challenges, and create/manage photo-capture campaigns on the InfinityWatch network. The API supports authentication via pre-login/login flows (signing messages with Ethereum or Solana wallets such as MetaMask/Phantom), challenge request submission, and campaign management including creation, photo feed retrieval, and editing. Key endpoints include POST /proof/v1/{proof_type}/pre-login, POST /proof/v1/{proof_type}/login, POST /proof/v1/{proof_type}/challenge-request-dcl, POST /proof/v1/{proof_type}/challenge-status-dcl, POST /create-campaign, POST /edit-campaign, POST /all-campaigns, and POST /photo-feed-from-campaign. The proof_type parameter supports 'pol' (Proof of Location) and 'pob' (Proof of Bandwidth). Sample code is available in Python and cURL. Developer documentation is at docs.witnesschain.com.

What industry is Witness Chain in?

Witness Chain's product category is Blockchain Verification Infrastructure (DePIN). Its primary akta.pro industry code is FSADAEAM, RWA Oracles, Data Attestation & Proof-of-Reserve/Proof-of-Collateral, with a secondary code of FSAPAAAL, Protocol Security, Monitoring & Risk Tooling (audits, formal verification, analytics). Its NAICS code is 522320 and its SIC code is 6199.