Developer Tools Startups

Snowplow provides customer data infrastructure that captures granular first-party behavioral data and turns it into real-time, AI-ready signals for product and marketing teams. It serves product teams building adaptive experiences, experimentation, and feature optimization by delivering historical and real-time user attributes without heavy in-house data engineering.

3 investors

Solo.io provides cloud connectivity solutions that help organizations secure, observe, and control their cloud environments. The company builds enterprise products for cloud-native application networking and service mesh management, serving Fortune 2000 companies and cloud-native organizations globally.

3 investors

Source.dev develops development tools for device software, leveraging deep expertise from building and maintaining Android and related operating systems at scale. The company serves device manufacturers and software engineers working on smart devices and embedded systems.

3 investors

SourceDNA offers a software similarity web service that scans iOS and Android apps to analyze their code for quality, origin, and intent, matching code and finding variants across platforms. It targets app developers and aims to bring transparency to the app stores.

3 investors

Sourcery provides automated code review and security scanning tools that integrate with developer workflows to catch vulnerabilities, logic errors, and security gaps in code from initial writing through merge. The platform is designed for teams working with AI-generated code and operates across GitHub, GitLab, and IDEs.

3 investors

Sparsity offers Nova, a platform for deploying applications to AWS Nitro Enclaves (trusted execution environments) with on-chain verification, taking code from GitHub to a running enclave. It targets developers building trusted, verifiable applications such as chatbots, oracles, key management, and private compute.

3 investors

Speakeasy provides an enterprise control plane for AI that lets companies securely manage and distribute MCP servers, skills, and AI assistants with fine-grained permissions, threat detection, and observability. It offers centralized governance, data-leak prevention, integrations with SaaS tools and identity providers, and usage analytics for organizations rolling out AI to their teams.

3 investors

Spec is a Mac-based application that integrates with users' digital tools and data sources to proactively assist with tasks like email management, messaging, reservations, task scheduling, and data retrieval across multiple applications.

3 investors

Specific builds infrastructure software for AI coding agents, enabling them to run, deploy, and maintain the code they generate with tools designed for AI-native workflows rather than human developers.

3 investors

Sphere provides stablecoin-based cross-border payment infrastructure, offering REST APIs, SDKs, a self-serve dashboard, and embedded fiat on/off-ramps that settle in under 30 minutes across more than 160 markets. It serves businesses such as neobanks, exchanges, PSPs, marketplaces, payroll platforms, and trading firms for dollar access, cross-border payments, and treasury and liquidity management.

3 investors

Spruce Labs provides AI-configured engineering systems for non-technical founders to build and ship software without hiring engineers or technical cofounders. The platform automates code planning, writing, review, and deployment while the founder maintains ownership of vision and infrastructure.

3 investors

Stack is a spatial browser alternative to traditional tab-based browsing, designed for productivity and mindful web use. The application combines a card-based interface with features like keyboard shortcuts, real-time collaboration, multiple profiles, ad/tracker blocking, and Chrome extension support.

3 investors

Stacklok Enterprise manages Model Context Protocol (MCP) servers as Kubernetes workloads with built-in observability, identity controls, and policy management for platform engineering teams. The platform provides security isolation, multi-tenant support, and federated authentication to govern MCP server deployment and usage across organizations.

3 investors

StackStorm is an event-driven automation platform that enables users to build conditional logic and complex workflows across integrated systems. It provides if-this-then-that capabilities for automating operations through triggers, actions, rules, and workflows.

3 investors

Stakpak is an open-source autonomous agent that runs on machines 24/7 to monitor, maintain, and automate operational tasks for software applications in production environments. It handles tasks like health checks, resource optimization, certificate renewal, and incident response with built-in security controls and full auditability.

3 investors

Standard Treasury built and hosted white-labeled and co-branded developer API platforms for banks, enabling those banks' customers to automate treasury management and accounting processes. The company was acquired by Silicon Valley Bank in August 2015.

3 investors

Start9 promotes decentralized personal computing that gives individuals control over their own data and communications, aiming to remove trusted third parties from the human/computer relationship. Its focus areas include privacy, encryption, and open decentralized network protocols such as the Internet and Bitcoin.

3 investors

Steadybit is a chaos engineering and reliability testing platform that helps product and engineering teams identify, validate, and fix reliability issues in their networks and applications before they reach production. It offers automatic target discovery, a drag-and-drop experiment editor, reliability advice, RBAC guardrails, an AI companion (SteadyBuddy), and open source extensions, with both SaaS and on-prem/air-gapped deployment options.

3 investors

Stelia provides a sovereign, production-ready platform for building, deploying, and scaling AI agents in enterprise environments with built-in governance and security. The platform unifies fragmented AI tooling into a single full-stack system designed for regulated and high-trust industries.

3 investors

Stellar provides generative AI, large language models, and machine learning integration services to help companies assess AI readiness, identify opportunities, and implement solutions across business operations. The company serves enterprises seeking to improve operational efficiency, revenue, and customer experiences through AI-driven transformation.

3 investors

Stigg provides a usage runtime that decides in real time what customers, users, and AI agents are allowed to do, combining credits, entitlements, metering, and spend governance in a single enforcement layer. It targets engineering teams monetizing AI and software products, layering on top of existing billing systems with bi-directional sync and offering hosted or self-managed VPC deployment.

3 investors

Streambased makes Apache Kafka and Apache Iceberg queryable together, providing a unified view of real-time and historical data without copying data or building new pipelines. Aimed at data teams, it supports real-time analytics, dashboards, machine learning, and data science by exposing Kafka topics as query-ready Iceberg tables.

3 investors

Streamdal provides code-native data privacy controls embedded directly in application code to detect and prevent personally identifiable information (PII) from being exposed in databases, data streams, or pipelines. The platform offers real-time data validation and privacy enforcement for applications across multiple programming languages.

3 investors

StreamingFast processes and indexes blockchain data, with core products Firehose and Substreams that provide high-performance indexing for high-throughput chains. It is an employee-owned enterprise and core developer on The Graph protocol, and also incubates and invests in early-stage infrastructure companies.

3 investors