Flux is a cross-chain oracle aggregator that provides smart contracts with access to economically secure data feeds on anything. Every component of the protocol is designed to be maximally open-source, permissionless, and trustless, enabling individuals and communities to design and develop bespoke solutions for data provision and retrieval.

Flux is supported and developed by the Open Oracle Association, a Swiss Non-Profit entity with the sole purpose of supporting the ecosystem through the distribution of grants both in monetary means through USDC and the Flux Token (FLX).

Flux Protocol

Chainlink is blockchain middleware that allows smart contracts to access key off-chain resources like data feeds, various web APIs, and traditional bank account payments. By providing smart contracts secure access to these key resources, ChainLink allows them to mimic real world agreements that require external proof of performance and need to make payment in widely available payment methods e.g. bank payments.

The Chainlink Network is a decentralized network of ChainLink Nodes, which are all selling usage of specific data feeds, APIs and various off-chain payment capabilities directly to a smart contract. Any data, payments, e-signature, or other API provider, as well as individual developers, can easily join the network by connecting an API they're familiar with. Once the API they'd like to offer to smart contracts is connected to a ChainLink, they become a ChainLink Node Operator, responsible for keeping that API connected to the ChainLink Network and being compensated in LINK for their successful fulfillment of on-chain requests.

The LINK token is an EIP20 token with additional ERC667 functionality. The total supply of the token is 1,000,000,000, and each token is divisible up to 18 decimal places. To prevent accidental burns, the token does not allow transfers to the contract itself and to 0x0.

Chainlink

Band Protocol is a decentralized, permissionless blockchain protocol for decentralized data curation. We create token-curated registries and communities.

Decentralized data curation protocol. Band is a protocol to Create Token-Curated Registry, each with its own community token. We band communities with open and reliable data source.

Band Protocol

DIA (Decentralised Information Asset) is an open-source, financial information platform that utilises crypto economic incentives to source and validate data. Market actors can supply, share and use financial and digital asset data.

As a Swiss-based non-profit association, it is DIA’s mission to democratise financial data, similar to what Wikipedia has done in the broader information space with regard to central encyclopaedias. DIA data sources and methodologies are transparent and publicly accessible to everyone. DIA uses crypto-economic incentives for its stakeholders to validate data sources when be added and throughout their usage.

Pulse is an open-source app for prediction markets, by the community, for the community. Built on Flux Protocol.


Pulse

Stake.gg is Open Prediction Markets for Gamers. Built on NEAR Protocol and Flux. Create and participate in open, no-limit prediction markets for everything eSports without the high gas fees.

Stake.gg

The API3 Foundation is a Decentralized Autonomous Organization (DAO) leading the movement from legacy third-party oracle networks to first-party oracle solutions that deliver more security, efficiency, and regulatory compliance. Powered by Airnode first-party oracles, API3’s Decentralized APIs (dAPIs) are decentrally controlled and blockchain-native data feeds with quantifiable security.

API3

Supra-Oracles, Securing Real-Time Data for a New, Trustless Economy.

Supra-Oracles provides you with a non-exclusive, credibly neutral, highly reliable oracle solution for your real-world data to speak between public and private chains.

We strive to bridge the gap between traditional capital markets and the Web3.0 ecosystem. Our vision and driving mission since day one, in 2017, has been to empower the developer community with a novel oracle toolset so that they may conveniently create, deploy, and manage data applications with superb performance, robustness, and agility.‍‍

‍Our team’s internal standards are driven by innovation, goals, and execution of measurable KPIs.

SupraOracles

Pyth Network is a specialized oracle solution for latency-sensitive financial data that is typically kept behind the “walled gardens” of centralized institutions. Pyth Network is focused on finding a new and inexpensive way to bring this unique data on-chain and aggregating it securely. 

Our market data is contributed by over 70 first-party publishers, including some of the biggest exchanges and market making firms in the world. We offer price feeds for a number of different asset classes, including US equities, commodities, and cryptocurrencies. Each price feed publishes a robust aggregate of publisher prices that updates multiple times per second.

Pyth

DotOracle is a real-time decentralized Oracle and Cross-chain liquidity network for EVM, non-EVM (Casper, Near, Aptos), and L2 blockchains.

The four main products:

- Multichain bridge: Fast, Affordable, and Secure way of moving liquidity between EVM, non-EVM (Casper, NEAR, Aptos), and L2 blockchains.
- Decentralized oracle: An advanced decentralized data feeding protocol offering multiple, real-time data sources with complementarity to and synergy with off-chain workers.
- Multichain NFT bridge: High scalability with superior security. It works by creating wrapped NFTs that preserve the original assets’ metadata without duplicating the assets themselves. The original NFTs are safely stored in custody and can be restituted to the holder if needed.
- Privacy-preserving bridge: Support privacy preservation for users when bridging stablecoins from other chains to Casper.

DotOracle

RedStone creates cross-chain data oracle providing pricing data for Smart Contracts & DeFi protocols.

Our mission is to unlock Web3 potential with affordable and reliable data feeds delivered to multiple chains including i.e. Ethereum, Avalanche or Polygon. We leverage Arweave blockchain to create affordable storage with a permanent audit trail of crypto and real world data feeds.

RedStone

Switchboard is a community governed protocol — if additional on-chain data is needed, you will be able to publish it yourself after reading through these docs.

Switchboard's products are the Explorer, Publisher and Verifiable Random Function (VRF).

- **Explorer**: Explorer is an explore page where users scour for **published feeds** (that have fixed parameters) and are able to take a feed’s public key to integrate it into their programs.

- **Publisher**: Publisher is a core application where users shop for **curated feed templates** or utilize the in-built low-code (drag-n-drop interface) custom build tool with many task types to build your very own feed. After selecting a curated feed template or building out a feed, users will go through a configuration panel to customize their parameters to fit a specific use case.

- **VRF**: Blockchains are not hardware, hence, true randomness is not achievable. Switchboard’s VRF was modelled after Algorand’s **pseudo-random functio**n implementation allowing verifiable randomness to be generated on-chain. Use cases such as Casinos, game theory, NFT minting mechanism can be relied on VRF.

Switchboard

Acurast is the steppingstone to unleash the next wave of Web3 innovation by bringing the
real world to the Web3 world. 

Web3’s problem is access to verifiable, interoperable, and accessible off-chain data.

Acurast solves this by providing an infrastructure with a multi-chain first approach through
its native interoperability layer. Developers gain access to a single abstraction layer that
fulfils their off-chain data needs for NEAR and other ecosystems they develop for.

Acurast

ORAO Network oracle system provides a large variety of secure data at high speed in real-time. From general data to local weather, insurance services and trading algorithms are enabled through 37,000 data points. Combined with over 200 data sources, variations are endless. Accurate data is delivered to your smart contracts giving you an advantage over competitors through customization.

AwesomeNEAR

Oracles

Oracles and Prediction Markets projects building on NEAR and Aurora.

Discover top NEAR and Aurora Oracles projects and DApps. Comparison of Ethereum Oracles, Solana Oracles, Polygon Oracles projects.

Flux Protocol

The trustless data layer for Web3.

Chainlink

Reliable tamper-proof inputs and outputs for complex smart contracts on any blockchain.

Band Protocol

Toolkit for making token-powered communities.

DIA

Open-Source Data and Oracles for DeFi.

Pulse

Decentralized Prediction Markets for Everything.

Stake.gg

Open Prediction Markets for Gamers.

API3

Decentralized APIs for Web 3.0.

SupraOracles

Bridging real-world data to automate, simplify, & secure the smart contracts of financial markets.

Pyth

Smarter data for smarter contracts.

DotOracle

Realtime decentralized Oracle and Cross-chain liquidity network.

RedStone

EVM compatible Oracles offering custom, high-frequency, cost-efficient data for DeFi.

Switchboard

Permission-less, customizable, multi-chain oracle protocol for general-purpose data feeds & verifiable randomness.

Acurast

On Demand Oracle Machine.

ORAO Network

Oracle Service for Custom Data Feeds.