Developer Tools Startups

Rystic develops API simulators that let developers test and train software agents in a local environment. The product targets engineers and teams building AI agents.

1 investor

S-cubism (株式会社エスキュービズム) provides end-to-end digital transformation support for companies, building its own software products and assembling project teams to deliver digital initiatives. The Japan-based firm develops multiple services and products that it combines to address client business challenges.

1 investor

S2C (思尔芯) develops EDA tools for semiconductor chip design and verification, including architecture design/modeling software, hardware emulation and prototyping systems, formal verification, and debug and cloud-based compute management platforms. Its products serve IC design companies working on SoCs for automotive electronics, CPU, AI, 5G, and cloud computing applications.

1 investor

SAALG Geomechanics is a Barcelona-based software startup that analyzes real-time monitoring data for geotechnical applications in construction and civil engineering. The company combines geotechnical expertise with software engineering to serve the construction industry.

1 investor

SadServers provides hands-on Linux and DevOps training scenarios and assessments for professionals, students, and companies evaluating technical candidates. The platform delivers practical, simulation-based learning through realistic server challenges.

1 investor

SafeDep builds infrastructure to make open source software safer and more trustworthy, focusing on software supply chain security for developers and organizations. It offers tools to help protect and secure open source dependencies.

1 investor

Saffron provides technical assessments for engineering hiring that evaluate how candidates work with AI coding tools. The platform captures and analyzes candidate interactions with code, AI prompts, and decisions to measure engineering competency in modern workflows.

1 investor

SageOx builds a team-memory platform that captures decisions, discussions, and AI agent sessions and makes that context available to both people and AI assistants. It offers a recording device, CLI, MCP server, and console that integrate with coding agents and assistants like Claude Code, Codex, and ChatGPT to feed shared team context.

1 investor

Sailfish is a production debugging platform that captures runtime evidence—execution paths, variable state, affected users, and code context—from live production systems and packages it into fix-ready debug packets for engineers and AI coding agents. It targets software engineering teams, providing debugger-level context that connects frontend behavior, backend execution, logs, and database state to help diagnose and prevent bugs.

1 investor

The Sails Company is a full-service web, mobile, and cloud development studio founded by the authors and maintainers of the open-source Sails framework. It offers software development services alongside free open-source software and professional support for the tools it maintains.

1 investor

Salus is a policy-aware proxy that intercepts and manages AI agent actions, allowing, clarifying, repairing, or escalating tool calls without requiring changes to the underlying agent or stack. It serves developers and teams building AI agents across LLMs and agentic frameworks.

1 investor

SanityDesk is a software platform helping experts, authors and coaches build and run their businesses online.

1 investor

SaolaAI develops software assurance solutions designed to help companies ensure their systems remain secure and reliable without breaking in production. The platform serves engineering teams and B2B SaaS companies seeking to integrate quality assurance into their development workflows.

1 investor

Sapling provides an API and SDK that let businesses embed language models into their applications, including a messaging assistant that integrates with CRMs and messaging platforms to help users compose responses more efficiently. It serves enterprise software teams building customer communication and productivity tools.

1 investor

Satora offers a developer SDK for non-custodial atomic swaps between Bitcoin (including Lightning) and stablecoins such as USDC and USDT across major EVM chains. It targets fintech developers, with TypeScript support and storage adapters for Node.js, browsers, and React Native.

1 investor

Satori is a decentralized compute network for building Turing-complete verifiable smart contracts using common programming languages, with participation possible from standard consumer hardware such as laptops. It targets developers building trustless web applications.

1 investor

Saucal is a WooCommerce development agency that builds, rebuilds, and optimizes online stores for ecommerce businesses. The company specializes in WordPress and WooCommerce customization, performance optimization, and ongoing maintenance services.

1 investor

Savio is a product feedback and feature request management platform that helps SaaS companies centralize customer feedback from multiple tools, prioritize features based on customer data, and build evidence-based product roadmaps.

1 investor

Sawmills offers an agentic telemetry platform that continuously analyzes, optimizes, and manages logs and metrics in real time, cutting observability costs and improving data quality before data reaches backends like Datadog, Splunk, or New Relic. It is aimed at DevOps and SRE teams, letting them set guardrails while developers self-service telemetry tuning via Slack, Teams, or the IDE.

1 investor

Sayers is an IT consulting firm that helps businesses modernize their technology infrastructure, strengthen cybersecurity posture, and achieve cloud-first transformation goals. The company serves enterprises across multiple industries including healthcare, offering services in network modernization, database optimization, ransomware readiness, and IT staffing.

1 investor

SBC is a fiat-backed stablecoin redeemable 1:1 for US dollars, built as a multi-chain token compatible with wallets like Metamask, Rainbow, and Phantom and platforms such as Uniswap. It offers open-source developer tools for the stablecoin ecosystem, with audited smart contracts, US-regulatory compliance, and MPC-based signing infrastructure for minting and burning across chains.

1 investor

Scaffold Ed is a platform for school and district leaders to collect and interpret feedback from staff, families, and community members to inform planning decisions and priorities. The tool aggregates community input from check-ins, messages, and surveys to help education leaders align decisions with community needs.

1 investor

Scala Computing offers a cloud platform for data center-scale network simulation and emulation, aimed at engineers designing and testing large-scale networking infrastructure for AI. The platform virtualizes custom network topologies at any scale and automates cloud deployment, user, and cost management for enterprise networking teams.

1 investor

ScalePad provides a comprehensive operating system and platform for managed service providers (MSPs), integrating asset management, warranty renewal, compliance, and business intelligence tools. The company serves MSPs globally to help them become indispensable partners to their clients.

1 investor