# Software Mansion > Custom Software Development Company Software Mansion offers software development services with focus on React Native, Starknet tools, blockchain technologies, and multimedia systems. Software Mansion provides software development services focusing on blockchain, React Native, and multimedia technology solutions. The company creates developer tools for Starknet and maintains multiple SDKs for Starknet interaction in Python, JVM, and Swift. The company builds custom software solutions for clients while contributing to open-source technologies. - Type: Company - Sector: Service Provider - Status: Active - Founded: 2012-01-01 - Profile: https://thegrid.id/profiles/software_mansion ## Products - [Starknet Foundry](https://thegrid.id/profiles/software_mansion): Starknet Foundry is a toolkit for testing and deploying tools for Starknet smart contracts through a command-line interface. The toolkit enables developers to write, test, and deploy Cairo contracts with built-in testing frameworks and deployment utilities. (Developer Tooling, Live, Main Product) - [Scarb](https://thegrid.id/profiles/software_mansion): Scarb is a package manager and build tool for the Cairo programming language. The tool handles compilation, dependency management, and project configuration for Cairo applications and Starknet contracts. The system implements standardized project structures and builds processes for Cairo development. (Developer Tooling, Live) - [Starknet Libraries](https://thegrid.id/profiles/software_mansion): Starknet Libraries provide development interfaces for interacting with Starknet blockchain from multiple programming languages. The libraries include starknet.py for Python, starknet.jvm for JVM languages, starknet.swift for Swift applications, starknet-js for Javascript. Each library implements methods for reading blockchain state, sending transactions, managing accounts, and interacting with smart contracts. (Developer Tooling, Live) - [Protostar](https://thegrid.id/profiles/software_mansion): Protostar implements smart contract development toolchain for Starknet, providing compilation, testing, and deployment capabilities through integrated Cairo compiler and testing framework. The system facilitates project management and dependency resolution while supporting cheatcodes and contract interaction utilities. (Developer Tooling, Inactive/Support Ended) ## Links - [Blog](https://blog.swmansion.com) - [Main](https://swmansion.com) - [Privacy policy](https://swmansion.com/privacy) - [Twitter / X](https://x.com/swmansion) - [Facebook](https://www.facebook.com/SoftwareMansion) - [GitHub](https://github.com/software-mansion) - [Instagram](https://www.instagram.com/swmansion) - [LinkedIn](https://www.linkedin.com/company/software-mansion) - [Discord](https://discord.com/invite/2gjSqPQc9Q) - [YouTube](https://www.youtube.com/c/SoftwareMansion) - [Telegram](https://t.me/hellocryptomansion) - [Twitter / X](https://x.com/swmansionxyz) ## Legal This data is provided under two licensing models. Model 1 - open data. The open data core is licensed under the Open Database License (ODbL) — a copyleft/share-alike license allowing free use, modification, and sharing for any purpose. Attribution is required: include "Powered by The Grid" linking to https://thegrid.id wherever the data is used. 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