Unlock Protocol

Unlock Protocol is a suite of upgradable smart contracts that lets developers, creators, brands and platforms issue onchain memberships and subscriptions as NFTs. In Unlock's terminology, a "Lock" is a smart contract that mints NFTs and can gate access to members-only resources such as online content, live events or certifications, while a "Key" is the NFT minted by a Lock, carrying membership-specific features such as an expiration date. The protocol is positioned around functionality that general-purpose NFT contracts do not address: time constraints, expirations and renewals, updatable pricing, recurring onchain payments, and functions for checking and managing membership status over time.

The system also emphasizes mainstream onboarding, with email-based memberships, walletless airdrops and integration with Apple Wallet and Google Wallet. Around the core protocol sits a broader structure: the Unlock Ecosystem of creators, distributors and consumers; the Unlock DAO, an organization of token holders that governs the protocol; the Unlock Protocol Foundation, a Cayman Islands foundation acting in service of the ecosystem and DAO; and Unlock Tools, front-end applications originally created by Unlock Labs (including a dashboard for creating Locks and managing Keys) and now maintained by ecosystem members. Unlock DAO Tokens (UDT) are ERC20 governance tokens distributed when membership NFTs are purchased, renewed or extended.

Developer resources include a protocol reference, libraries, APIs, integration tools, template repositories and tutorials. Reported use cases from users include event ticketing (DappCon), token gating and time-based memberships (thirdweb), in-game membership features (Pixels Online), professional certification (PlannerDAO's CDAA certification), and connecting membership NFTs to backend membership requirements (Web3 Academy).

Founding story

Unlock was founded by Julien Genestoux, described as founder and CEO of Unlock and previously lead engineer at Medium. Genestoux had earlier founded Superfeedr, a service generating RSS feeds at scale that was acquired by Medium, and participated in the W3C's social web work, co-authoring specifications in the group that produced ActivityPub. He has described Unlock as synthesizing his prior work on open communication protocols and monetization into a paid membership system for creators.

Business model

Unlock is an open-source, collectively owned, peer-to-peer protocol rather than a closed platform. Its factory contract (Unlock.sol) deploys membership contracts ("Locks") and can collect a protocol fee when membership keys are purchased, renewed or extended; fees may be denominated in native or ERC20 currencies. From version 13, collected fees can be swapped for UDT via Uniswap and burned, reducing circulating supply. Historically, governance tokens were distributed to protocol users as a developer reward; from version 14, governance token rewards equal half the protocol fee. Enabling the protocol fee is a decision for the DAO. Front-end convenience applications ("Unlock Tools"), including a dashboard for creating Locks and managing Keys, were originally built by Unlock Labs and are now maintained by members of the ecosystem.

The protocol can charge a fee collected by the Unlock contract when a membership or subscription key is purchased or extended, denominated in native or ERC20 currencies. The fee is not enabled by default and its activation is a DAO decision. Collected fees can be swapped into UDT and burned, and a portion (half the protocol fee, under version 14) is used to compute governance token rewards.

Traction

The company reports the protocol is used by more than 5,000 developers and community members and cites 282% year-over-year growth in the number of deployed membership smart contracts on production networks. Named users and integrators include DappCon (event ticketing set up in under two weeks), thirdweb, Pixels Online (membership feature built and launched by one developer in two weeks), Kazm, PlannerDAO (CDAA certification), and Web3 Academy. In Gitcoin Grants Round 15, the number of grantees in the Unlock ecosystem grew from 14 to 28.

Latest developments

Version 13 of the Unlock contract (February 2024) introduced a "swap and burn" mechanism converting collected protocol fees into UDT via Uniswap and sending them to a burn address. As of summer 2024 the Unlock contract on the most active networks is owned by the Unlock Protocol DAO. Version 14 (January 2025) tied governance token rewards to half the protocol fee, allowed additional transactions to be bundled into lock deployment, and replaced the `udt` reference with `governanceToken`. In 2025, Unlock Labs completed its transfer of responsibilities to the Unlock Protocol Foundation and the Unlock DAO.