Head-to-head · SDKs & Libraries
Features, pricing, health score, community ratings — side-by-side from the live MadeOnSol database.
Updated July 18, 2026
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| Rating | (0) | (0) |
| Pricing | Free | Free |
| Health | Healthy | Healthy |
| Chain | solana only | solana only |
| Open Source | ||
| Features | 5 features | 5 features |
| Upvotes |
Pros & cons
Analysis
sol4k sol4k is a Kotlin client for Solana that lets JVM and Android developers talk to the chain without leaving their language ecosystem. It works with Kotlin, Java and other JVM languages, and runs on And... Solana Web3.js Solana Web3.js — now evolving into Solana Kit (@solana/kit) under Anza — is the official JavaScript/TypeScript SDK for interacting with the Solana blockchain. It's the foundational client library near...
Both sol4k and Solana Web3.js hold similar community ratings, suggesting users find comparable value in each. Your choice should come down to specific features, pricing, and ecosystem fit rather than overall score.
sol4k uses a free model, while Solana Web3.js is free. Both tools are free, so cost isn't a deciding factor — focus on features and reliability instead.
sol4k offers 5 features including Kotlin client usable from Java and any JVM language, Runs on Android and JavaScript targets, Account queries, balances, blockhash and transaction simulation, and 2 more. Solana Web3.js counters with 5 features including Official JavaScript/TypeScript SDK for Solana, Build, sign, and send transactions, Read account and on-chain program state, and 2 more. The right choice depends on which specific features matter for your use case — check the individual review pages for full breakdowns.
We monitor both tools around the clock for uptime, SSL validity, and response times. sol4k currently has a healthy health status with 100.0% uptime over the last 30 days. Solana Web3.js is rated healthy with 100.0% uptime. For any tool you trust with your funds, trades, or yield, uptime and speed are non-negotiable.
sol4k's key strengths include native solana access for jvm and android stacks, avoids bridging to a javascript sdk, supports both versioned and legacy transactions. Solana Web3.js stands out for canonical, anza-maintained ecosystem standard, smaller bundles and faster crypto in v2, vast ecosystem of docs, examples, and tooling. On the flip side, sol4k's weaknesses include community library, not an official solana sdk, while Solana Web3.js's main drawback is v1 to @solana/kit migration can confuse newcomers.
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| Twitter Followers | 14 | 21,568 |
| Categories | SDKs & Libraries | SDKs & Libraries |
| Description | Kotlin client for Solana | Official JavaScript SDK for building Solana applications |
Both sol4k and Solana Web3.js operate in the sdks & libraries space, so this is a direct head-to-head. Neither has a clear community advantage, so your decision should be feature-driven. We recommend trying both — sol4k is free to start and Solana Web3.js is free to start. Read user reviews on each tool's page for real-world feedback from the Solana community.