Developer Tools Startups

SDF Labs built SQL comprehension technology for data analytics workflows, now integrated into dbt following its acquisition by dbt Labs. Its technology understands SQL to speed up data tooling and enable metadata use-cases such as column-level lineage for data teams.

2 investors

Seal Security provides an AppSec remediation agent that delivers backported, human-vetted patches for open source vulnerabilities across application dependencies, Linux packages, and end-of-life or legacy systems. It integrates with build pipelines and SCA tools to fix vulnerabilities in place—including transitive and "unfixable" ones—for security and engineering teams needing to meet compliance standards like FedRAMP and PCI DSS.

2 investors

Seald provides an end-to-end encryption SDK for web and mobile applications, enabling developers to encrypt sensitive data client-to-client so that only authorized parties hold decryption keys. The toolkit addresses data access vulnerabilities and helps applications comply with regulations like HIPAA, GDPR, and CCPA.

2 investors

Seezo is an AI security tool that generates threat models and explainable security requirements from design-stage inputs, showing a decision tree with the reasoning behind each requirement. It integrates with existing developer and collaboration tools like Jira, GitHub, Slack, and Confluence, serving security teams during the software design and review process.

2 investors

Segmind is a generative AI platform that gives developers access to third-party AI models for image, video, audio, and music generation and editing. It offers prebuilt workflows ("Pixelflows") for use cases such as ecommerce product imagery, fashion, marketing, advertising, and social content.

2 investors

Sema builds tools that help organizations understand and communicate their codebases to both technical and non-technical stakeholders. The company provides code analysis and reporting capabilities designed to bridge communication between engineers and leadership.

2 investors

Semmle built a semantic code analysis engine that lets developers and security researchers write declarative queries to find vulnerabilities and code patterns across large codebases. The company, acquired by GitHub, serves security teams and open source communities, and operates lgtm.com.

2 investors

Semodia Platform is a web-based management platform for modular production systems and Module Type Packages (MTPs), enabling manufacturers and plant operators to validate, manage, and share automation modules while connecting suppliers with equipment owners through an integrated marketplace.

2 investors

Sentient develops open-source AI research and tools that enable AI agents to self-improve, reason, and learn autonomously using benchmarks and datasets. The company serves AI builders and organizations deploying specialized AI agents, operating in the AI/ML and developer tools space.

2 investors

Sentrial builds a monitoring and debugging platform for AI agents and products in production, detecting issues like infinite loops and hallucinations while providing diagnostics and remediation recommendations to development teams.

2 investors

Sequence provides developer infrastructure for blockchain applications, including smart crypto wallets, 1-click cross-chain payments, and real-time multi-chain data indexing. It serves web3 developers and ecosystems building onchain apps across EVM chains.

2 investors

Servoy offers a rapid application development platform based on Java and JavaScript that developers use to build custom business software, from customer-facing apps to core enterprise systems, deployable on-premise, cloud, or private. It targets professional developers and businesses across various sectors seeking faster software delivery.

2 investors

SF Tensor builds software and infrastructure for high-performance AI and HPC workloads, offering automatic kernel optimization and cross-cloud compute management to reduce costs and complexity for research teams. The company provides Tensor Cloud (managed GPU orchestration), a Kernel Optimizer, and the Emma programming language to abstract hardware differences while maintaining performance.

2 investors

Sharetribe provides a no-code platform that enables entrepreneurs and organizations to build and launch online marketplaces. The company serves founders, startups, cooperatives, nonprofits, and enterprises seeking to create sustainable marketplace businesses.

2 investors

Sherloq is a platform for saving, managing, and sharing SQL queries, with versioning and team collaboration features that integrate with AI chat tools. It serves data analysts and SQL users who need centralized query management and code organization.

2 investors

Shinami provides developer infrastructure for building decentralized applications, including a gas station service that lets apps sponsor gas fees for users and wallet services that abstract Web3 complexity. Its tools support the Movement, Aptos, and Sui blockchains.

2 investors

Shippable was a Seattle-area provider of container-based continuous integration and delivery software, acquired by JFrog.

2 investors

Overcut provides infrastructure for building, orchestrating, and governing custom AI agents and multi-agent workflows across the software development lifecycle, integrated with version control, CI/CD, and team collaboration tools. The platform enables engineering teams to automate work within the SDLC while maintaining enterprise governance and security.

2 investors

Shorebird is a platform for Flutter developers that provides Code Push to deploy patches and fixes to live apps without waiting for app store review cycles, along with a zero-config CI system for automated testing and releases. It offers instant rollbacks, version adoption monitoring, and a global distribution network for shipping updates.

2 investors

ShortKit provides an SDK and infrastructure platform for building and scaling short-form vertical video applications. The platform offers video player mechanics, transcoding, content management, analytics, and monetization features for publishers and media companies.

2 investors

Shotstack provides a browser-based video editing platform designed for automated, template-based bulk video creation. The platform enables businesses and developers to generate thousands of video variations from a single template by using merge fields for dynamic content replacement, without requiring coding or traditional video editing software expertise.

2 investors

SID trains agentic search models that improve search accuracy and performance on complex search tasks by providing better contextual understanding. The company develops AI models designed to connect intelligence to the world through advanced search capabilities.

2 investors

Sidero Labs builds the Talos Platform, including Talos Linux — a minimal, immutable Linux OS purpose-built to run Kubernetes with a managed API (no SSH or shell), atomic upgrades, and security defaults like mTLS, CIS guidelines, and FIPS 140-3 compliance. It targets teams operating Kubernetes fleets across distributed, mission-critical, and physically constrained environments.

2 investors

SigmaOS is a macOS web browser that organizes tabs into workspaces and includes AI-powered features like website summarization and contextual search. It targets students, founders, and creatives seeking improved productivity and focus.

2 investors