What is Squid? DeFi Protocol Guide

Squid operates as a cross-chain liquidity and messaging router enabling single-transaction swaps of any supported token between chains. It serves as an infrastructure layer that aggregates liquidity from over 130 decentralized exchanges (DEXs) and several cross-chain bridges to determine efficient transaction routes, and it offers a developer-oriented API, SDK, and front-end widget alongside a consumer application for direct use.

Overview

The protocol was designed to reduce liquidity fragmentation and streamline user workflows across multiple blockchains. Rather than relying on a single interoperability system, Squid functions as a "bridge of bridges," combining several cross-chain communication protocols—including Axelar, Circle's Cross-Chain Transfer Protocol (CCTP), Inter-Blockchain Communication (IBC), and LayerZero—to improve resilience and provide flexible routing.

Squid began inside the Axelar ecosystem before spinning out as an independent company, Squid Router Inc., which enabled integrations with a broader set of protocols and chains. A typical swap facilitated by Squid bundles a source-chain DEX swap, a bridge transfer, and a destination-chain DEX swap into one user-signed transaction. Since the start of 2023, Squid has handled over $6 billion in transaction volume for more than one million unique users.

History

The idea for Squid was conceived in the summer of 2022 by co-founders Julian Traversa and "Fig"; an early prototype earned a prize at an Axelar-hosted hackathon. The protocol launched on mainnet on January 31, 2023, with initial support for 25 blockchains.

On February 15, 2023, Squid disclosed a $4 million seed financing round led by Polychain Capital, with participation from Nomad Capital, North Island Ventures, Distributed Global, and other backers. The capital was earmarked for team expansion and to onboard additional blockchains.

A substantial upgrade termed Squid 2.0 went live on August 15, 2023, adding a more composable API, the ability to pay destination gas fees using source tokens, and custom contract call support. Subsequently, on October 26, 2023, Squid unveiled a major integration with the XRP Ledger (XRPL) in partnership with Ripple and Axelar, delivering the first secure bridge for swaps between XRPL and EVM ecosystems.

In March 2026, Squid launched Squid Intents, an intent-based settlement protocol intended to supplant its original architecture by moving complex logic off-chain to lower gas costs, enhance reliability, and broaden support to non-EVM chains such as Bitcoin.

Technology

Squid’s technical design has shifted from an on-chain routing approach to an off-chain, intent-driven system to improve efficiency.

Routing Architecture

At first, Squid operated as a graph-based router built on General Message Passing (GMP) protocols with Axelar as the core layer. The router calculated an optimal swap path that typically consisted of:

The Squid 2.0 release improved this model by introducing "multi-protocol hopping," which permits a single transaction to utilize multiple DEXs and bridges (for example, Axelar and CCTP) to identify the most efficient route.

Squid Intents

• A swap on a source chain DEX to a bridge-compatible asset (e.g., swapping ETH for axlUSDC).
• A bridging transaction to move the asset to the destination chain.
• A final swap on a destination chain DEX to the user's desired asset (e.g., axlUSDC to MATIC).
• Faster Execution: Solvers can provide near-instant fulfillment, with average execution times around 5 seconds.
• MEV Protection: The off-chain auction protects users from Maximal Extractable Value (MEV) and front-running.
• Reduced Gas Costs: Complex steps are paid for by the solver, and on-chain transactions are simplified to basic transfers.
• Higher Reliability: The model eliminates route expiry, a common failure point in cross-chain transactions, making it suitable for institutional and multisig workflows.

Products and Services

Squid offers a suite of tools aimed at developers, end users, and institutional partners.

For Developers

For Users

For Institutions and Chains

• API/SDK: A REST API and a JavaScript/TypeScript SDK are available for integrating Squid's cross-chain functionality into the backend or frontend of applications. These tools allow dApps to programmatically access routing logic for custom integrations.
• Widget: A customizable, drop-in React component that allows developers to add a cross-chain swap interface to their dApp with minimal code. This widget is used by projects on the XRPL EVM Sidechain.
• Bridge App: The main consumer-facing web application for performing direct cross-chain swaps and bridges.
• SquidScan: An explorer tool for tracking the status and progress of transactions across all supported chains.
• Wallet View: A feature within the Squid app that provides a consolidated portfolio view of a user's token balances across all supported blockchains.
• Fiat On-Ramp: An integration with services like Onramper and Kado that allows users to purchase cryptocurrency using fiat currency (via debit/credit card or Apple Pay) and have it delivered directly to a wallet on any supported chain.
• Squid Connect: A service for blockchain foundations and token issuers to integrate their network or asset into Squid’s ecosystem, providing instant access to liquidity and users.
• Bespoke Solutions: Squid offers custom-built infrastructure for institutional clients dealing with stablecoins, foreign exchange, Real-World Assets (RWAs), and permissioned blockchains.

Funding

Squid raised $4 million in a seed round announced on February 15, 2023, with Polychain Capital serving as lead investor. Other participants included Nomad Capital, North Island Ventures, M-Ventures, Chorus One, The Department of XYZ, Distributed Global, Fabric Ventures, and Mischief, along with over 30 angel investors from projects such as Axelar, Cosmos, dYdX, LayerZero, and Aave.

Luke Pearson, a partner at lead investor Polychain Capital, commented on the investment, stating, "Squid’s architecture, which leverages existing DEX liquidity and Axelar’s secure message-passing, is a fundamentally more secure and capital-efficient approach to interoperability."