List of Developer Tooling companies in Web3 (2026)

Solana Actions is a specification-compliant API framework that returns signable transactions on the Solana blockchain, enabling applications to deliver complex onchain interactions directly to users without requiring them to navigate away from their current context.

WDK provides open-source libraries and modules for building self-custodial wallets supporting multiple blockchains. The modular architecture includes wallet modules for blockchain operations, protocol modules for DeFi integrations including swaps, bridges, and lending, and pre-built UI components for React Native. Built on Bare runtime, it supports Node.js and React Native environments, enabling deployment across mobile, desktop, embedded systems, and server applications.

Polygon CDK is a developer toolkit for launching custom ZK-powered Layer 2 chains that are interoperable with the Polygon AggLayer ecosystem. It enables teams to build sovereign L2s with configurable data availability, sequencing, and execution environments.

Arbitrum Stylus is a developer tooling upgrade to Arbitrum Nitro that adds a WebAssembly (WASM) virtual machine alongside the EVM on Arbitrum One and Nova. It enables writing smart contracts in Rust, C, C++, and other WASM-compatible languages, with Stylus contracts interoperable with existing Solidity deployments through shared interfaces. WASM execution reduces gas costs for memory and compute-intensive operations compared to equivalent EVM bytecode.

AvaCloud is a managed Avalanche L1 deployment service that lets enterprises launch custom blockchains without operating validator infrastructure themselves. The platform handles validator hosting, monitoring, RPC endpoints, and software upgrades while providing compliance-aware configurations for regulated deployments. Customers retain full control over chain parameters, gas tokens, and validator sets while offloading operational overhead.

OP Stack is an open-source software stack for building Layer 2 blockchains and rollups that settle to Ethereum. Developers use OP Stack components to launch custom chains with configurable execution layers, sequencers, and data availability options while inheriting Ethereum security through fraud-proof verification. Chains built on OP Stack natively interoperate within the Superchain ecosystem through shared messaging and bridge protocols.

TON Virtual Machine is a stack-based execution environment for running smart contracts on The Open Network. It processes asynchronous messages and compiles contracts written in FunC, Tact, and Tolk into gas-optimized bytecode. The Acton CLI provides scaffolding, testing, debugging, deployment, and verification in a single binary.

SNF Faucet is a testnet faucet for the Starknet Sepolia network. It distributes test ETH and STRK tokens to developer wallet addresses upon request. It allows developers to fund test accounts for smart contract development and testing without acquiring mainnet tokens.

A modular blockchain development toolkit built on the Substrate framework for creating custom blockchains with access to Polkadot shared security. The SDK includes configurable consensus mechanisms, governance modules, runtime pallets, and tooling for building interoperable chains that connect to the Polkadot relay chain.

Cosmos SDK is a framework for developers to build custom, application-specific blockchains. It provides tools and modules for creating interoperable, secure Layer 1 blockchains that can communicate with other blockchains using the Inter-Blockchain Communication (IBC) protocol. It is designed for developers who need a flexible and modular platform to create decentralized applications.

Hooks implements smart contract functionality through small WebAssembly modules that execute before and after XRPL transactions. The system enables logic execution on accounts while maintaining the ledger's performance characteristics through efficient code deployment.

Stellar Smart Contracts is a Rust-based smart contracts platform integrated with the Stellar blockchain that compiles and executes contracts in WASM through a runtime with multi-core scaling and an optimized fee model. Developer tooling includes plug-and-play SDKs, a CLI, an RPC server, and a local sandbox environment. The platform supports state archival, Secp256r1 passkey verification, and BLS12-381 cryptographic operations.

Chainlink VRF generates verifiable random numbers for smart contracts through cryptographic proof mechanisms published and verified onchain. The system prevents tampering by oracle operators, developers, or miners through cryptographic verification of random value generation. VRF v2.5 supports subscription-based and direct funding payment models with LINK or native tokens.

NEAR AI provides infrastructure for autonomous agent deployment including encrypted model execution through Trusted Execution Environments, verifiable compute mechanisms, and multichain action capabilities. The platform enables AI agents to own assets, execute transactions, and process private data without on-chain exposure while maintaining cryptographic verifiability.

BeaconKit implements modular consensus infrastructure through CometBFT integration, enabling EVM-identical blockchain development with customizable validation. The system provides single-slot finality while supporting alternative consensus mechanisms.

AlgoKit is a developer toolkit for building decentralized applications on Algorand. It provides native TypeScript and Python smart contract development with CLI tools for project scaffolding, local blockchain testing, automated deployment, and a visual debugger. The toolkit includes LORA, a web-based explorer for inspecting on-chain accounts, transactions, and applications during development.

OKX API provides REST and WebSocket APIs for cryptocurrency trading and market data access. The API supports trading operations, market data streaming, and account management with comprehensive documentation and SDKs.

DCAP Dashboard automates onchain collateral upkeep for Intel SGX and TDX attestation workflows through smart contracts deployed across multiple EVM networks. The platform continuously fetches, validates, and refreshes DCAP collateral files including PCK certificates, TCB info, and CRLs, preventing silent attestation failures as upstream certificates expire or are revoked. It provides a unified interface for monitoring collateral health across validator networks, rollups, and AI agent infrastructure, backed by Automata's TEE Attestation SDKs and Multi-Prover AVS.

Rollup-as-a-Service is a platform that enables enterprises to deploy custom Layer 2 rollups on Ethereum within minutes, providing enterprise-grade infrastructure with 24/7 monitoring and Web3 service integrations.

A set of APIs and developer tools including Swap (Classic, Fusion, Fusion+), Portfolio API, Web3 RPC, security endpoints, and data APIs for tokens and pricing.

Klein is a node installation and management tool for Cosmos ecosystem blockchains that simplifies deploying validator and full nodes through a user-friendly dashboard. Instead of command-line workflows and manual server operations, operators use Klein to install, run, and control Cosmos AppChain nodes without writing code. The tool emphasizes privacy by not collecting or storing personal or node-related information.

Taproot Assets allows issuing and transferring tokenized assets on Bitcoin, using Taproot for scalability and compatibility.

Jupiter Plugin provides an open-source embeddable swap interface enabling developers to integrate Jupiter's swap functionality with minimal code. The toolkit supports multiple display modes, custom configurations, referral programs, wallet passthrough, and RPC-less transactions while maintaining the full experience. Developers implement token swapping capabilities through standardized integration patterns.

Chainlist is a reference directory of EVM-compatible blockchain networks providing chain IDs, native currency details, and public RPC endpoints. Users browse available networks and add them directly to compatible wallets with a single action. Developers reference the data for standardizing network integrations.

AgentKit is a developer framework that enables AI agents to interact with blockchain networks through secure wallet management and onchain capabilities. The system provides 50+ blockchain actions across multiple wallet providers while maintaining framework-agnostic compatibility with various AI models and development tools.

A cross-chain transfer SDK enabling Web3 applications to accept asset deposits from any blockchain network directly to their smart contracts. The toolkit provides three integration methods including link-based URLs, JavaScript SDK packages, and backend API endpoints. Developers embed the interface within their applications to display branded cross-chain functionality while maintaining direct smart contract interaction capabilities. The SDK processes transfers through the underlying Meson Protocol infrastructure, handling signature verification and transaction routing across supported blockchain networks. Applications implementing the required smart contract methods receive cross-chain transferred assets without managing bridge complexity or liquidity provider coordination.

Subgraphs implement flexible blockchain indexing through TypeScript, enabling developers to create custom GraphQL APIs from smart contract data. The system processes on-chain events and provides queryable endpoints with webhook support and automated deployment capabilities.

OVault extends the ERC-4626 tokenized vault standard with omnichain functionality, enabling users to deposit assets from any supported chain and receive yield-bearing vault shares on their preferred network. The system uses a hub-and-spoke architecture where the vault resides on a single hub chain while users interact from any spoke chain through LayerZero messaging. Share tokens implement the OFT standard for cross-chain composability, and the OVault Composer orchestrates multi-step deposit and redemption operations across chains.

DeFi API is an API platform that provides unified access to multiple decentralized finance protocols and applications. It enables developers to integrate DeFi functionality including token swaps across chains, liquidity provision, and interaction with various DeFi projects through standardized endpoints.

A developer toolkit to build, test, deploy, and run custom blockchain data indexers and GraphQL APIs on the SubQuery Network, helping developers deliver fast, flexible data for dApps.

Core toolkit helping developers build cross-chain applications with a unified API for multiple blockchains. Simplifies cross-chain transactions by automatically handling network-specific requirements like gas fees and signature formats.

Solana App Kit is a React Native mobile development framework with modular architecture, enabling iOS and Android application creation with multiple protocol integrations. The system provides pre-built components for wallet integration, token trading, NFT management, and real-time blockchain data access.

Crossmint Authentication provides user identity verification through email, social media logins, and wallet connections. The system enables progressive onboarding flows and integrates with the wallet infrastructure for identity management.

Squid Widget is an embeddable React component that allows applications to integrate cross-chain swapping functionality directly into their interfaces. The widget supports customizable themes and configurations for seamless user experiences.

Core smart contract infrastructure consolidating liquidity across all Fluid protocols, enabling seamless capital flow between lending, borrowing, and trading functions through automated supply/borrow operations.

Filecoin Virtual Machine provides smart contract functionality on the Filecoin blockchain, enabling developers to deploy programmable storage applications and automate storage deals through code execution.

Dash Platform implements a decentralized API and data storage layer through Drive and DAPI components, enabling application development on the Dash network. The system provides developer SDKs while maintaining security through the masternode infrastructure.

Arc is an open-source tokenization engine providing modular infrastructure for RWA onboarding and compliance automation. The system integrates KYC verification through Parallel Markets and zkME, AML monitoring capabilities, smart account custody via ZeroDev integration, and automated yield distribution linking offchain banking streams to tokenized asset positions through configurable compliance modules.

A white-label orderbook infrastructure that provides shared liquidity across multiple blockchains, enabling developers to build spot and perpetual futures trading platforms with centralized exchange-level performance and decentralized custody.

OneClickConnect is an open-source JavaScript and TypeScript library providing a standardized transport-layer protocol for connecting decentralized applications to wallets in the NEAR ecosystem. The library handles wallet detection and message routing automatically without private key exposure or manual provider selection. It is compatible with Wallet Selector and supports React and React Native environments.

Subgraph Studio is a development platform for building, testing, and deploying subgraphs to The Graph Network. The system provides API key management, billing integration, and testing environments for developers creating blockchain data APIs.

Portal Enclave MPC API provides server-side blockchain signing through TSS MPC cryptography combined with AWS Nitro Secure Enclaves. The system enables sub-second transaction signing for EVM-compatible and Solana smart contracts through RESTful API endpoints.

AI agent development framework that enables secure, autonomous on-chain actions and DeFi operations. Integrates with various AI frameworks and supports Model Context Protocol (MCP) for building blockchain-capable AI agents.

Crypto Exchange API is a developer API that enables platforms to add crypto swap functionality and expand supported coins and tokens, with partner revenue sharing and priority support.

HyperIndex is a multi-chain indexing framework that turns on-chain events into structured data with a queryable API. It supports real-time indexing, multi-chain configurations, and schema-driven development across EVM and Fuel.

A development toolkit that enables dapp integration with MetaMask across multiple platforms. The system provides authentication, transaction handling, and contract interaction capabilities for Web3 applications.

Haiku API provides programmatic access to the Declarative Transaction execution engine through REST endpoints. The strategy execution flow accepts a target portfolio state via /quote and converts it to an unsigned EVM transaction via /solve; a natural language flow processes plain-text commands via /buildIntentNaturalLanguage. The system handles cross-chain routing and protocol interactions with all-or-nothing execution guarantees.

Staking API delivers unified REST endpoints for integrating non-custodial staking operations across multiple proof-of-stake networks through single authentication. The API automates validator deployment, stake management, unbonding operations, and reward tracking through standardized methods. Implementation supports distributed validator technology, EigenLayer restaking, and advanced staking configurations with comprehensive SDKs and integration templates.

QuickAlerts is a feature that provides real-time notifications about onchain events, helping users stay updated with the latest blockchain activities

Dwellir Agent Toolkit provides tooling for AI agent interactions with blockchain RPC infrastructure, including a CLI with structured JSON output using a standard response envelope, agent-optimized documentation following the llms.txt specification, an automated RPC migration prompt for codebase scanning and endpoint replacement, and a portable Hyperliquid agent skill compatible with multiple AI coding tools.