Infura is a blockchain infrastructure-as-a-service platform that provides developers with remote Ethereum node access through JSON-RPC APIs. Built by ConsenSys (the Ethereum software studio founded by Joseph Lubin), Infura handles the heavy lifting of running and maintaining synchronized Ethereum (and other) full nodes, letting developers interact with the blockchain via simple API calls without operating their own infrastructure.
Infura is so widely used that it represents a significant centralization chokepoint in the Ethereum ecosystem — when Infura has downtime, thousands of Web3 applications stop working.
How It Works
Running a full Ethereum node requires:
- 2+ TB of synchronized blockchain data
- High-performance hardware
- 24/7 uptime maintenance
- Continuous updates as protocols upgrade
This is impractical for most developers. Infura provides an alternative:
- Developer signs up for an Infura account, gets an API key and endpoint URL
- Developer configures their application (or MetaMask) to use the Infura endpoint
- Infura routes all requests (read blockchain data, submit transactions) to its node infrastructure
- Developer never runs their own node
Endpoint format:
“`
https://mainnet.infura.io/v3/YOUR_PROJECT_ID
“`
MetaMask, the dominant Ethereum browser wallet, uses Infura as its default RPC provider — this means every MetaMask user is indirectly dependent on Infura by default.
Supported Networks
Infura supports multiple networks beyond Ethereum mainnet:
- Ethereum Mainnet, Goerli/Sepolia testnets
- Polygon (PoS and zkEVM)
- Optimism
- Arbitrum
- Linea (ConsenSys’s own L2)
- Avalanche C-Chain
- BNB Chain (Binance Smart Chain)
- NEAR
- Filecoin / IPFS API
History
| Year | Events |
|---|---|
| 2016 | Infura founded by Michael Wuehler and Maurycy Pietrzak within the ConsenSys ecosystem |
| 2017 | Becomes the default provider as MetaMask and early dApps adopt it for Ethereum access |
| 2019 | Acquires 100,000+ developers as DeFi grows |
| 2020 | DeFi Summer creates massive Ethereum usage spikes; Infura handles the load but becomes visibly central |
| 2020 | Infura blocks access to MetaMask users from certain jurisdictions (US sanctions compliance) — controversy about centralized censorship |
| 2021 | Major Infura outage in November 2021 causes widespread dApp disruptions, MetaMask failures, and trading issues across DeFi |
| 2022 | ConsenSys raises $450M; Infura continues as a core product |
| 2023 | Infura launches NFT API, expanded multi-chain API suite |
| 2024 | Linea (ConsenSys/Infura L2) grows; Infura positions as multi-chain infrastructure platform |
The Centralization Problem
Infura is the most cited example of centralization risk in the “decentralized” Ethereum ecosystem:
The MetaMask dependency: When MetaMask uses Infura as default RPC, millions of users trust a single company’s infrastructure to serve their wallet data. A MetaMask + Infura incident could affect the majority of Ethereum retail users simultaneously.
The November 2021 Outage: An Infura service disruption caused:
- MetaMask users unable to see balances or submit transactions
- DeFi frontends (Uniswap, Aave, others) unable to function
- Arbitrage bots and liquidation systems failing
- Estimated millions in trading losses from protocol users unable to act
The Sanctions Incident (2020): Infura blocked certain jurisdictions (regions under US sanctions) from accessing its API. This demonstrated that a centralized node provider can impose censorship at scale — antithetical to blockchain’s stated censorship-resistance.
Alternatives
In response to Infura centralization concerns, several competing solutions have emerged:
- Alchemy — Infura’s main competitor, also hosted, developer-friendly
- QuickNode — Multi-chain node provider
- Ankr — Decentralized node infrastructure
- Chainstack — Managed node provider
- Running your own node — Most decentralized option; practical for serious operators using hardware like a Dappnode or dedicated server
Common Misconceptions
“Infura is part of Ethereum itself”
Infura is a private ConsenSys service that runs nodes connecting to the public Ethereum network. Ethereum’s protocol is entirely separate. Infura’s dominance is market adoption, not protocol design.
“Infura going down would break Ethereum”
Infura’s infrastructure going down would break the many applications that depend on it, but Ethereum itself (the peer-to-peer network of thousands of independent nodes) would continue running normally. Applications using Infura would fail; Ethereum would not.
Social Media Sentiment
Infura is simultaneously appreciated for its developer convenience and criticized as a centralization vector. The 2021 outage is frequently cited in discussions about Web3’s dependence on centralized services. “Decentralization theater” critics use Infura as evidence that Web3 applications are not meaningfully decentralized at the infrastructure layer. Defenders argue that Infura is a practical bootstrap solution and that node diversity will grow as the ecosystem matures. The parallel with AWS (Amazon Web Services) centralization in “decentralized” internet services is a common comparison.
Last updated: 2026-04
Related Terms
Sources
- ConsenSys. (2022). Infura: Blockchain Infrastructure for Web3 Applications. ConsenSys Blog.
- Messari. (2021). The Infura Outage and What It Reveals About Web3 Centralization. Messari Research.
- Buterin, V. (2021). The Limits to Blockchain Scalability. Ethereum Foundation Blog.