Ink Protocol
Ink Protocol is an Ethereum-based decentralized reputation and payment protocol (XNK ERC20 token) enabling portable on-chain buyer/seller reputation, escrow, and crypto payments across P2P marketplaces such as Listia, Craigslist, Facebook Marketplace, and OfferUp.
- Company typePrivate
- Founded2017
- HeadquartersSanta Clara, United States
- Headcount11–50
- GTM typeB2C
- OfferingSoftware
What Ink Protocol does
Ink Protocol is a decentralized reputation and payment protocol built on the Ethereum blockchain, operated by Santa Clara-based Listia Inc. Its core product is the XNK ERC20 token, which serves as the native medium of exchange for peer-to-peer transactions and as the anchor for an on-chain reputation layer in which ratings are tied to actual payments and therefore cannot be fabricated or lost when a user changes marketplaces. The protocol supports wallet-to-wallet payments, optional decentralized escrow with mediator dispute resolution, and cross-chain compatibility for user convenience. The company monetizes indirectly through transaction fees denominated in XNK, mediator fees for dispute services, and commissions on the Listia marketplace.
The product surface extends beyond the protocol itself through three integrated offerings: Ink Pay, a dApp that brings XNK payments and reputation to third-party platforms such as Craigslist, Facebook Marketplace, and OfferUp; Replin, a wholly-owned seller reputation app that bridges blockchain-based reputation with PayPal fiat payments and exposes a portable seller profile across P2P marketplaces, forums, and classifieds sites; and the Listia marketplace itself, the legacy P2P marketplace (founded 2009) on which Ink Protocol was first deployed. Developer access is provided through a Developer Portal (developer.inkprotocol.com) and Gitter community, and partnerships with Kleros (dispute resolution), Sharetribe (marketplace integration), Bounty0x (incentives), Props (consumer token economies), and PayPal (fiat rails via Replin) form the broader ecosystem.
The go-to-market combines product-led growth (direct P2P use on Listia and via Ink Pay), channel partnerships (Sharetribe, Replin, classifieds integrations), and community-led adoption through the Ethereum/DeFi and P2P trading communities. The customer base is overwhelmingly long-tail individual buyers and sellers on P2P marketplaces, with marketplace platforms as a secondary business segment seeking reputation infrastructure. Disclosed funding totals approximately $11.15M across a 2009 angel round, a 2011 A16Z-led seed, a 2013 General Catalyst-led Series A, and later participation by Consensys Ventures and SV Angel; revenue figures are not publicly disclosed.
Ink Protocol firmographics
Firmographics- Name
- Ink Protocol
- Legal name
- Ink Protocol
- Website
- https://paywithink.com
- Company type
- Private
- Founded year
- 2017
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- Ink Protocol is an Ethereum-based decentralized reputation and payment protocol (XNK ERC20 token) enabling portable on-chain buyer/seller reputation, escrow, and crypto payments across P2P marketplaces such as Listia, Craigslist, Facebook Marketplace, and OfferUp.
- Ownership category
- akta.pro rank
Ink Protocol industry classification
Industry- Product category
- Blockchain Payment Protocol
- NAICS
- Financial Transactions Processing, Reserve, and Clearinghouse Activities (522320), Financial Transactions Processing, Reserve, and Clearinghouse Activities (52232)
- SIC
- Security & Commodity Brokers, Dealers, Exchanges & Services (6200), Finance Services (6199)
- akta.pro primary industry
- Crypto Payments & Stablecoin Settlement Platforms (BPAMAFAL)
- akta.pro secondary industries
- Crypto Payment Gateways & Checkout APIs (FSADAIAA), Stored Value Ledger / Wallet Infrastructure (Non-Bank) (FSAMANAM)
Keywords
Where Ink Protocol is headquartered
LocationHeadquarters
- HQ city
- Santa Clara
- HQ country
- United States
- HQ region
- North America
Markets served
Ink Protocol business model
Business model- GTM type
- B2C
- Offering type
- Software
- Cost components
- Technology or R&D, Personnel, Infrastructure, Operations, Marketing or Sales
Revenue model
- XNK Token Transactions: XNK is the native token used in all Ink Protocol transactions. The token serves as the underlying currency for payments, with transaction fees potentially accruing to network participants or the protocol treasury.
- Mediation Services: XNK is earned by mediators for the dispute resolution services they provide on transactions. This creates a marketplace for trust services within the protocol.
- Listia Marketplace Transactions: The Listia marketplace, which uses XNK as its virtual currency, generates revenue through item sales and transactions. Millions of items have been listed with thousands of daily transactions.
Go-to-market motion3 records
Distribution channels6 records
Marketing channels5 records
Ink Protocol product offering
Product offeringCore offering
Ink Protocol is a decentralized reputation and payment system built on the Ethereum blockchain using the XNK ERC20 token. It enables trustless peer-to-peer transactions between buyers and sellers through direct wallet-to-wallet payments, an immutable on-chain reputation system, and optional decentralized escrow with mediator dispute resolution. The protocol operates as infrastructure for P2P marketplaces, including the parent company's Listia marketplace, and is accessible via the Ink Pay dApp, Replin reputation app, and a Developer API.
Product overview
Ink Protocol is a decentralized reputation and payment ecosystem built on Ethereum with the XNK ERC20 token at its core. The primary products include: Ink Protocol (the core decentralized payment and reputation system), XNK Token (the native cryptocurrency for transactions and governance), Ink Pay (a dApp for making XNK payments on third-party platforms), Replin (a seller reputation app enabling PayPal payments with blockchain-backed reputation), and the Listia Marketplace (the original platform where Ink Protocol is deployed). The ecosystem also includes a Developer Portal for API access and third-party integrations. The protocol enables peer-to-peer transactions with decentralized escrow, reputation building, and low fees compared to traditional payment systems.
Differentiator
Problem solved
Functional benefit
Brands
- Replin: Seller reputation app built on top of Ink Protocol that helps marketplace sellers drive more sales by building trust and reputation everywhere they sell
- Ink Pay
Products and services
- Ink Protocol A decentralized reputation and payment protocol built on the Ethereum blockchain using the XNK ERC20 token, enabling secure, trustless peer-to-peer transactions with an immutable on-chain reputation system for buyers and sellers without intermediaries.
- XNK Token The native ERC20-compatible cryptocurrency token of Ink Protocol, used for all transactions, paying for goods and services, rewarding honest reviews, staking, and governance participation.
- Ink Pay A decentralized application (dApp) enabling buyers and sellers to make and receive XNK cryptocurrency payments on third-party platforms like Craigslist, Facebook Marketplace, and OfferUp, with reputation checking, feedback capabilities, and optional mediator/escrow services.
- Replin A seller reputation app built on top of Ink Protocol that helps marketplace sellers drive more sales by building trust, using PayPal for payments and creating a single public reputation profile across any P2P marketplace, forum, or classifieds site with ratings tied to actual payments stored on Ethereum.
- Listia Marketplace The original marketplace platform that adopted Ink Protocol as its native reputation and payment system, supporting buying and selling of clothing, collectibles, electronics, toys, gadgets, jewelry, and more using XNK tokens, with 10M registered users and 100M items sold.
- Developer Portal Developer portal providing API access for building integrations with Ink Protocol, including marketplace integrations, reputation data access, and Ink Pay payment processing, with a Gitter community for developer collaboration.
Quantifiable outcome
- Low fees compared to traditional payment systems
- +2 more outcomes
Companies that use Ink Protocol
Customer profileNamed customers5 records
Segments4 records
Ideal customer profiles3 records
Ink Protocol technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Integration9 records
Feature6 records
Ink Protocol partnerships and signals
Strategic signalPartnerships
Six partnerships are on record, tiered core and minor.
- PropscorePartnership with Props Project to push the vision of a large-scale consumer token economy together, combining Ink Protocol's P2P reputation system with Props' video platform token ecosystem.
- PayPalcorePayPal partnership through Replin enables fiat payment processing alongside blockchain-based reputation, allowing users to link PayPal accounts for transactions.
- KleroscorePartnership announced March 2018 for integration of decentralized dispute resolution services into the Ink Protocol ecosystem, enabling Kleros juries to resolve transaction disputes.
- Bounty0xminorPartnership announced March 2018 for bounty and incentive programs related to Ink Protocol adoption and community growth.
- SharetribecorePartnership announced March 2018 to integrate Ink Protocol's decentralized reputation and payment system into Sharetribe's marketplace platform.
- Best BuyminorPartnership with Best Buy to power the Listia Rewards Store, allowing Listia users to redeem credits for Best Buy products.
Scale indicators7 records
Recent moves6 records
Expansion highlights5 records
Ink Protocol competitors and assessment
Company assessmentDirect peers
- NOWPayments: Cryptocurrency payment gateway offering checkout APIs, mass payouts, and a wide range of supported tokens — directly analogous to Ink Pay's role as an embeddable crypto checkout for marketplaces.
- Coinbase Commerce: Coinbase's merchant crypto-payment gateway allowing merchants and marketplaces to accept BTC, ETH, USDC and other assets. Directly comparable to Ink Pay as a crypto checkout for P2P and e-commerce flows.
- BitPay: Long-standing crypto payment gateway for merchants, with settlement and invoicing APIs. Comparable to Ink Protocol as a payment-rail layer for online sellers, including marketplace and small-ticket transactions.
- Flexa: Crypto payments network for merchants with fraud protection and instant settlement. Comparable to Ink Pay's dApp-style merchant checkout experience and merchant-facing ease-of-use focus.
- BTCPay Server: Open-source, self-hosted Bitcoin and crypto payment processor for merchants. Comparable as a permissionless, intermediary-free payment infrastructure that marketplaces and platforms can self-deploy.
Others
- Sharetribe: Marketplace platform that Ink Protocol integrated with in 2018 to add reputation/payments. Adjacent comparator since they co-build P2P commerce infrastructure, although they are an integration partner rather than a payments competitor.
Broad incumbents
- Uphold: Multi-asset digital money platform that supports merchant-like payouts and crypto/fiat conversion. Comparable as a broader payments and digital-asset infrastructure competitor with more capital and scale.
- PayPal: Already integrated via Replin, PayPal offers consumer trust infrastructure and now stablecoin/crypto rails. Comparable as the fiat incumbent whose payments + dispute layer Ink Protocol positions against in P2P commerce.
Emerging players
- Request Network: Web3 protocol for decentralized payment requests and invoicing on Ethereum. Closely comparable to Ink Protocol's payment-and-reputation infrastructure thesis, though focused on invoices rather than P2P marketplace reputation.
- Civic: Decentralized identity and reputation/attestation platform on blockchain. Comparable to Ink Protocol's reputation-system layer, although Civic focuses on identity verification rather than P2P marketplace reputation tied to payments.
Market position
Strengths4 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
Ink Protocol social profiles
Digital presenceInk Protocol financial estimates
Financial estimateRevenue estimate
Valuation estimate
Ink Protocol leadership team
Management profileNumber of profiles
Profiles1 record
Ink Protocol subsidiaries and ownership
Company hierarchySubsidiaries1 record
Ink Protocol funding detail
Funding detailFunding overview
Funding rounds2 records
Investors2 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Ink Protocol 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 Ink Protocol
What does Ink Protocol do?
Ink Protocol is a decentralized reputation and payment system built on the Ethereum blockchain using the XNK ERC20 token. It enables trustless peer-to-peer transactions between buyers and sellers through direct wallet-to-wallet payments, an immutable on-chain reputation system, and optional decentralized escrow with mediator dispute resolution. The protocol operates as infrastructure for P2P marketplaces, including the parent company's Listia marketplace, and is accessible via the Ink Pay dApp, Replin reputation app, and a Developer API.
Is Ink Protocol a public or private company?
Ink Protocol is a private company. It is classified as venture growth investor backed and is currently operating.
When was Ink Protocol founded?
Ink Protocol was founded in 2017. It employs 11 to 50 people.
Where is Ink Protocol based?
Ink Protocol is headquartered in Santa Clara, United States, in the North America region.
How does Ink Protocol make money?
Three revenue lines are on record. XNK Token Transactions are the primary driver. The others are mediation Services and listia Marketplace Transactions.
Who are Ink Protocol's main competitors?
Direct peers on record are NOWPayments, Coinbase Commerce, BitPay, Flexa and BTCPay Server. Sharetribe is listed as an others. Broad incumbents are Uphold and PayPal. Emerging players are Request Network and Civic.
Does Ink Protocol have an API?
Yes. Developer Portal launched March 2018 (developer.inkprotocol.com) for API access. Gitter community channel available at gitter.im/InkProtocol/contracts for developer engagement. Supports marketplace integrations, reputation data access, and Ink Pay payment processing. Developer documentation is at developer.inkprotocol.com.
What industry is Ink Protocol in?
Ink Protocol's product category is Blockchain Payment Protocol. Its primary akta.pro industry code is BPAMAFAL, Crypto Payments & Stablecoin Settlement Platforms, with a secondary code of FSADAIAA, Crypto Payment Gateways & Checkout APIs. Its NAICS code is 522320 and its SIC code is 6200.