Find the right tools to build on Web3.

Best for Managed RPC across the major chains plus XRPL, Stellar and Hedera

Chains

Ethereum Solana Base BNB Chain Avalanche Arbitrum Polygon XRP Ledger Stellar Hedera

Price

Free trial (1 month, 10M credits); paid from $49/mo (Build)

License

Proprietary

A managed RPC and streams provider whose network list names all seven major chains we track plus the XRP Ledger and Stellar. Hedera support is through the EVM JSON-RPC relay, not Hedera's native API. No Algorand or Xahau. A one-month trial, then paid plans.

Best for Shared and dedicated nodes with a free developer plan

Chains

Ethereum Solana Base BNB Chain Avalanche Arbitrum Polygon XRP Ledger Stellar

Price

Free Developer plan (3M RU/mo); paid from $49/mo (Growth)

License

Proprietary

Shared and dedicated nodes with archive data and a free Developer plan. Its protocol list names the major EVM chains, Solana, the XRP Ledger and Stellar. Hedera is dedicated-node-by-request only, so we don't count it; no Algorand or Xahau.

Best for Node APIs plus enhanced token, NFT and webhook APIs

Chains

Ethereum Solana Base BNB Chain Avalanche Arbitrum Polygon Stellar

Price

Free tier (30M CU/mo); Pay as You Go $0.525 per 1M CU; Enterprise custom

License

Proprietary

Node APIs with extra data, NFT and token APIs, webhooks and wallet infrastructure on top, and a generous free tier. Its chain list covers the major EVM chains, Solana and Stellar, but not the XRP Ledger, Algorand, Hedera or Xahau.

Best for RPC nodes for 50+ chains, including XRPL, Stellar and Algorand

Chains

Ethereum Solana Base BNB Chain Avalanche Arbitrum Polygon XRP Ledger Stellar Algorand

Price

Free tier (50K CU); Pro shared plans e.g. $399/mo billed yearly for 600M-1B CU; dedicated from $1,000

License

Proprietary

Shared and dedicated RPC nodes priced in compute units, with a free tier. One of the few providers that names the XRP Ledger (mainnet only), Stellar and Algorand alongside the major chains. No Hedera or Xahau.

Best for Node and explorer APIs with the widest payments-chain coverage

Chains

Ethereum Solana Base BNB Chain Avalanche Arbitrum Polygon XRP Ledger Stellar Algorand Hedera

Price

Free Start plan (100K requests/mo); paid plan prices not shown on its pricing page

License

Proprietary

Node-as-a-service RPC and block-explorer APIs for 100+ chains. In our checks it named the most payments chains of any provider: XRP Ledger, Stellar (including Soroban), Algorand and Hedera. Free Start plan; paid plan prices weren't shown on its pricing page when we checked. No Xahau.

Best for Algorand algod and indexer APIs with a free public tier

Chains

Algorand

Price

Free public API (no key); paid low-latency plans on its pricing page

Algorand node and indexer API provider (formerly AlgoNode) with free public endpoints for MainNet and TestNet and paid low-latency plans. The free tier adds latency. AlgoKit's default endpoints point at its network.

Best for Use ethers, viem, Hardhat or Foundry against Hedera

Chains

Hedera

Price

Free (open source, self-host)

License

Apache-2.0

Open-source relay that translates Ethereum JSON-RPC calls into Hedera, so standard EVM tools can talk to Hedera. Config documents mainnet, testnet and previewnet. Self-host it for free; it is actively maintained under the Hiero project.

Best for Build and deploy dApps on Evernode's decentralized hosting on Xahau

Chains

Xahau

Price

SDK free on npm; hosting fees not published in the docs we checked

Evernode's developer kit (evdevkit) and HotPocket SDK let you build dApps locally and deploy them across Evernode's decentralized hosting network on Xahau, in most languages that run on a POSIX system. The kit is actively released. Hosting is paid to hosts; the docs we read don't state fees.

Best for Fast Solidity build, test and deploy toolkit

Chains

Ethereum Any EVM chain (no specific chain named)

Price

Free (open source)

License

MIT OR Apache-2.0

A Rust toolkit (Forge, Cast, Anvil, Chisel) for compiling, testing, deploying and poking at Solidity contracts, popular for fast tests and fuzzing. Free and open source. Its docs name Ethereum and otherwise work on any EVM chain, so we don't give it chain-specific badges.

Best for Plugin-based TypeScript environment for EVM contracts

Chains

Ethereum Any EVM chain (no specific chain named)

Price

Free (open source)

A plugin-based TypeScript development environment to compile, test, debug and deploy EVM contracts, with a large plugin ecosystem. Free and open source. Its docs name Ethereum mainnet and testnets and otherwise target any EVM chain.

Best for Standard Solidity token and access-control contracts

Chains

Ethereum Any EVM chain (no specific chain named)

Price

Free (open source)

License

MIT

The standard library of reusable Solidity contracts: ERC-20, 721 and 1155 tokens, access control and utilities. Free and MIT-licensed. Written for Ethereum and any EVM chain. OpenZeppelin also publishes a separate Soroban library for Stellar.

Best for The standard framework for Solana programs

Chains

Solana

Price

Free (open source)

License

Apache-2.0

Rust framework and CLI for writing, testing and deploying Solana programs, with generated IDLs and clients. Free and open source; its quickstart names localnet, devnet and mainnet clusters.

Best for Algorand's official toolchain for contracts and LocalNet

Chains

Algorand

Price

Free (open source)

License

MIT

The Algorand Foundation's CLI and toolchain for scaffolding, building, testing on LocalNet and deploying Algorand smart contracts, with built-in MainNet and TestNet configs. Free and MIT-licensed. Pairs with Puya, the Algorand Python compiler.

Best for Reference JavaScript library for the XRP Ledger

Chains

XRP Ledger testnet

Price

Free (open source)

License

ISC

The XRPL Foundation's JavaScript and TypeScript library for building, signing and submitting XRP Ledger transactions. Free, ISC-licensed and actively maintained. The README example uses Testnet; the library works with any XRPL network.

Best for Official SDK for Horizon, Stellar RPC and Soroban contracts

Chains

Stellar

Price

Free (open source)

License

Apache-2.0

The Stellar Development Foundation's JavaScript and TypeScript SDK for Horizon, Stellar RPC and Soroban contract clients. Free and Apache-2.0; its README names Mainnet, Testnet and Futurenet.

Best for Official SDK for Hedera accounts, tokens, consensus and contracts

Chains

Hedera

Price

Free (open source)

License

Apache-2.0

The official JavaScript and TypeScript SDK for Hedera's native services: accounts, HTS tokens, the consensus service and smart contracts. Free, Apache-2.0 and released frequently. Java, Go, Python and Rust SDKs also exist.

Best for Official JavaScript library for Xahau

Chains

Xahau

Price

Free (open source)

License

ISC

The official JavaScript and TypeScript client library for Xahau, a fork of xrpl.js, published on npm as 'xahau'. Free and actively maintained. The quickstart uses testnet; Xahau's docs list the public mainnet endpoints.

Best for Scaffold, compile and test Xahau Hooks

Chains

Xahau testnet

Price

Free (open source)

License

GPL-3.0-or-later (toolkit); MIT (@xahau/hooks-cli)

TypeScript SDK and CLI for scaffolding, compiling, setting and testing Xahau Hooks smart contracts. Free and open source (the toolkit is GPL-3.0, the CLI MIT). The docs only show a testnet configuration, so we list it as testnet.

Best for Work with Evernode hosts and leases from your own app

Chains

Xahau

Price

Free on npm

License

custom (evernode-license.pdf in repo)

Evernode's JavaScript library for working with hosts, leases, tokens and Xahau transactions from your own application. Free on npm under Evernode's own license. We couldn't see a recent commit date when we checked, so confirm it's current before you depend on it.

Best for Let APIs charge AI agents per request in stablecoins

Chains

Solana Base Arbitrum Polygon

Price

Facilitator: 1,000 transactions free per month, then $0.001 per transaction (gas separate)

An open HTTP-402 payment protocol plus Coinbase's hosted facilitator, so an API can charge AI agents per request in stablecoins. The facilitator documents Base, Polygon, Arbitrum and Solana mainnets; 1,000 transactions a month are free, then a tenth of a cent each, plus gas.

Best for Stablecoin wallets with spend limits for AI agents

Chains

Solana Base BNB Chain Arbitrum Polygon Stellar

Price

Free 1,000 Monthly Active Wallets, then $0.025/MAU; custom from $0.02/MAW

License

Proprietary

Server-signed stablecoin wallets with spend permissions so an agent can pay through x402 or on-chain transfers. Self-serve on Base, Solana, BNB Chain, Arbitrum, Polygon and Stellar; Ethereum and Avalanche are by request through sales. The first 1,000 monthly active wallets are free.

Best for MCP server for AI clients to read and transact on BNB Chain

Chains

Ethereum Base BNB Chain Arbitrum Polygon

Price

Free (open source)

License

MIT

BNB Chain's MCP server lets AI clients read and transact on BNB Smart Chain and other EVM chains, including agent registration. Free and MIT-licensed. Its README warns that the SSE endpoint is unauthenticated, so don't expose it publicly.

Best for Agent toolkit for Hedera tokens, accounts and contracts

Chains

Hedera testnet

Price

Free (open source)

License

Apache-2.0

Hashgraph's JavaScript and Python agent toolkit with plugins for Hedera tokens, accounts, consensus and contracts, plus LangChain, Vercel AI and MCP adapters. Free and Apache-2.0. The pages we checked only show testnet setup, so we list it as testnet.

Best for Let AI clients build and sign Algorand transactions

Chains

Algorand

Price

Free (open source)

License

MIT

A third-party MCP server (GoPlausible, not the Algorand Foundation) with a local agent wallet that builds, signs and submits Algorand transactions. Mainnet by default, with testnet and localnet. Free and MIT. Wallet mnemonics are stored in a local file, so treat the machine it runs on accordingly.

Best for Static analyzer for Solidity and Vyper

Chains

Ethereum Any EVM chain (no specific chain named)

Price

Free (open source)

License

AGPL-3.0

Trail of Bits' static analyzer for Solidity and Vyper, with built-in vulnerability detectors and code-inspection printers. Runs locally; free and AGPL-3.0. Works on any EVM codebase. A clean run doesn't mean a contract is secure.

Best for Property-based fuzzer for EVM contracts

Chains

Ethereum Any EVM chain (no specific chain named)

Price

Free (open source)

License

AGPL-3.0

Trail of Bits' property-based fuzzer that tries to break the invariants you write for your EVM contracts. Runs locally; free and AGPL-3.0. Works on any EVM codebase.

Best for Transaction simulation, debugging and monitoring

Chains

Ethereum Base Avalanche Arbitrum Polygon

Price

Free plan for individuals; team plans custom-quoted

License

Proprietary

Hosted platform for simulating and tracing transactions, debugging failures and monitoring contracts with alerts, plus node RPC. Free plan for individuals; team plans are quoted. Its node network list names Ethereum, Base, Avalanche, Arbitrum and Polygon; BNB Chain wasn't listed when we checked.

Best for Formal verification against rules you write

Chains

Solana Stellar Any EVM chain (no specific chain named)

Price

Free tier (up to 2,000 min/month runtime); Premium and Enterprise by contact

License

GPL-3.0

Formal verification engine that checks contracts against rules written in Certora's CVL. Open source (GPL-3.0) with a free tier of 2,000 minutes a month. Its docs name EVM chains generally, plus Solana and Stellar (Soroban) variants. Writing good rules takes real effort.

Best for Fuzzing framework for Solana programs

Chains

Solana

Price

Free (open source)

License

MIT

Ackee Blockchain's Rust fuzzing framework for Solana programs. Free and MIT-licensed; runs locally against your code.

Best for Static analyzer with Soroban-specific detectors

Chains

Stellar

Price

Free (open source)

License

MIT

CoinFabrik's open-source static analyzer with detectors written for Soroban contracts on Stellar (run as cargo scout-audit). Free and MIT. Use scout-audit; the older scout-soroban repo is no longer updated.

Best for Self-hosted on-chain monitoring and alerts

Chains

Ethereum Solana Stellar Any EVM chain (no specific chain named)

Price

Free (open source, self-hosted)

License

AGPL-3.0

Self-hosted service that watches on-chain activity and sends alerts when your conditions match. Free and AGPL-3.0. Its example configs cover Ethereum, Stellar and Solana mainnets, and it works with EVM networks generally.

Best for Smart and MPC wallets with email and social login

Chains

Solana Base BNB Chain Arbitrum Polygon Stellar

Price

Free 1,000 Monthly Active Wallets, then $0.025/MAU; custom from $0.02/MAW

License

Proprietary

Wallet API and SDK for users and backends with email and social login, plus onramp and checkout. Self-serve on Solana, Base, BNB Chain, Arbitrum, Polygon and Stellar, each with named mainnet and testnet. First 1,000 monthly active wallets free.

Best for Account-abstraction wallets with gas sponsorship

Chains

Ethereum Solana Base BNB Chain Arbitrum Polygon

Price

Free tier (gas sponsorship testnet only); Pay as You Go $0.525/1M CUs + 8% gas sponsorship admin fee; Enterprise custom

Smart wallets with a bundler, gas sponsorship and embedded sign-in (formerly Account Kit). Covers the major EVM chains we track except Avalanche; on Solana it offers gas sponsorship only. The free tier sponsors gas on testnets only.

Best for ERC-4337 bundler and paymaster infrastructure

Chains

Ethereum Base BNB Chain Avalanche Arbitrum Polygon

Price

Not published on the pages we checked

Bundler and paymaster infrastructure for ERC-4337 smart accounts, plus the permissionless.js library. Its network list names Ethereum, Base, BNB Chain, Avalanche, Arbitrum and Polygon. Pricing wasn't published on the pages we read.

Best for One connect button for Freighter, xBull, Lobstr and more

Chains

Stellar

Price

Free (open source)

License

MIT

One API and connect button for Freighter, xBull, Lobstr, WalletConnect and other Stellar wallets. Free, MIT-licensed and actively maintained.

Best for Algorand wallet connector for React, Vue, Solid and Svelte

Chains

Algorand

Price

Free (open source)

License

MIT

TxnLab's framework-agnostic Algorand wallet connector for Pera, Defly, Lute, WalletConnect and more, with React, Vue, Solid and Svelte adapters. Free, MIT and actively maintained.

Best for Sign-in and transaction signing through the Xaman wallet

Chains

XRP Ledger Xahau^** Docs name the chain but not the network.

Price

Not published on the pages we checked

XRPL Labs' API and SDK for sign requests, sign-in (OAuth2 and OpenID) and xApps that send signing to the Xaman wallet. Its docs name both the XRP Ledger and Xahau as networks; they don't say mainnet for Xahau explicitly. Pricing isn't on the pages we read.

Best for Index chain data into GraphQL with subgraphs

Chains

Ethereum Solana Base BNB Chain Avalanche Arbitrum Polygon

Price

Free first 100K queries/mo; then $2 per 100,000 queries

License

MIT / Apache-2.0 (graph-node)

Decentralized indexing: build subgraphs or Substreams and query chain data over GraphQL. The first 100,000 queries a month are free, then $2 per 100,000. Covers the major EVM chains and Solana (through Substreams), none of the payments chains.

Best for Hosted subgraphs and streaming data pipelines

Chains

Ethereum Solana Base BNB Chain Avalanche Arbitrum Polygon Stellar Hedera

Price

Free Starter ($100 one-time credits); Scale pay-as-you-go (subgraphs $0.05/hr); Enterprise custom

License

Proprietary

Managed subgraph hosting and Turbo streaming pipelines. Notable for naming Hedera (subgraphs) and Stellar (Turbo) as well as the major chains. Starts with one-time free credits, then pay as you go.

Best for Wallet, token, NFT and DeFi data APIs

Chains

Ethereum Solana Base BNB Chain Avalanche Arbitrum Polygon

Price

Data Feeds Starter $10/mo; Starter $149/mo; Pro $249/mo; Business $749/mo (billed annually); Enterprise custom

License

Proprietary

Wallet, token, NFT and DeFi data APIs plus Streams webhooks and RPC nodes across the major EVM chains and Solana. Paid plans only on its pricing page when we checked.

Best for GraphQL APIs and streams for on-chain and DEX data

Chains

Ethereum Solana Base BNB Chain Avalanche Arbitrum Polygon XRP Ledger Stellar Algorand

Price

Personal $29/mo, Pro $69/mo, Scale $199/mo (billed annually); its pricing page shows conflicting figures

License

Proprietary

GraphQL APIs and streams for real-time and historical on-chain and DEX data across 40+ chains, including the XRP Ledger, Stellar and Algorand as full-history data packs. Paid plans; its pricing page showed conflicting figures, so confirm there.

Best for SQL analytics and data API over decoded chain data

Chains

Ethereum Solana Base BNB Chain Avalanche Arbitrum Polygon XRP Ledger Stellar

Price

Free view-only tier; paid Analyst, Plus and Enterprise plans on its pricing page

License

Proprietary

SQL analytics over decoded multi-chain data with dashboards and a query API. Its data catalog includes the XRP Ledger and Stellar alongside the major chains. Free view-only tier; check the pricing page for paid plans.

Best for Account, NFT and token data API for XRPL and Xahau

Chains

XRP Ledger Xahau

Price

Free (non-commercial, 2K req/day); paid from EUR 30/mo to EUR 2,000/mo; on-demand per-request; free on test networks

License

Proprietary

REST API for XRP Ledger and Xahau account, NFT, token and transaction data, the backend behind the Bithomp and Xahau explorers. Free for non-commercial use with daily limits; paid plans from 30 euros a month. Its docs list both XRPL and Xahau mainnet endpoints.

Best for Historical REST and gRPC API for Hedera

Chains

Hedera

Price

Free public endpoints (mainnet throttled 50 rps/IP); self-host free

License

Apache-2.0

Hedera's historical and indexed REST and gRPC API for transactions, accounts, tokens and contract logs. Free public endpoints are rate-limited and described by Hedera as not for production; self-host or use a commercial provider for that.

Best for Wallets, contracts and NFTs in Unity and Unreal

Chains

Ethereum Base BNB Chain Avalanche Arbitrum Polygon XRP Ledger testnet Hedera Any EVM chain (no specific chain named)

Price

SDKs free/open source; platform plans Growth $99/mo, Scale $499/mo, Pro from $1,499/mo with free usage allowances (first 1,000 wallets, 1M RPC requests)

License

Apache-2.0

Game-engine SDKs for in-app and smart wallets, contract calls, tokens, NFTs and marketplaces. Free and open source; thirdweb's platform plans apply for heavier use. The Unity SDK is active; the Unreal plugin moves more slowly. Its chain pages cover thirdweb as a whole, not the game SDKs specifically. No Solana.

Best for Connect players' existing EVM and Solana wallets in Unity

Chains

Ethereum Solana Base Avalanche Arbitrum Polygon

Price

Free Starter tier (500 MAU, 2.5M RPC calls/mo); Pro $89/mo; Growth $350/mo

License

Reown Community License (source-available, not OSI)

Unity package that connects players' existing wallets through WalletConnect and adds a wallet modal. Needs Unity 2023.1 or later and targets mobile, desktop and WebGL. Free starter tier. Source-available under Reown's own license, not an open-source license.

Best for Embedded wallets and gas sponsorship for Unity games

Chains

Ethereum Solana Base BNB Chain Avalanche Arbitrum Polygon

Price

Free tier (2,000 ops, then $0.01/op); Growth $99/mo; Pro $249/mo; Scale $599/mo; Enterprise custom

Embedded non-custodial wallets, smart accounts and gas sponsorship for Unity games, with a free tier. Its own README calls the Unity SDK a work in progress, and built-in social login isn't available in Unity, so you need a third-party auth provider.

Best for Open-source Unity toolkit for Solana games

Chains

Solana

Price

Free (open source)

License

MIT

MagicBlock's MIT-licensed Unity toolkit for Solana: full RPC, wallets including Phantom, SPL tokens, Metaplex NFTs and the Mobile Wallet Adapter. Supports Android and WebGL.

Best for Modular open-source Unity SDK for EVM chains

Chains

Ethereum Base BNB Chain Avalanche Polygon

Price

Free (open source)

License

LGPL-3.0

ChainSafe's modular C# SDK for wallets, contract calls, NFTs and tokens in Unity games. Free (LGPL-3.0). Development has slowed: the last release and commit were in November 2025, so check activity before you build on it.