Developer Tools Startups

AMP is an open-source web component framework for building websites, Web Stories, and interactive emails with fast page performance. It provides ready-to-use components for developers and publishers creating content on the open web.

4 investors

SPREAD provides a unified engineering platform that integrates data from PLM, CAD, ERP, and ALM systems into a single connected ontology for complex product manufacturers. It serves automotive OEMs and other companies building complex products across Europe.

4 investors

Sqreen provides runtime application security monitoring for enterprises, analyzing code execution in real time to protect applications, APIs, and microservices from attacks while maintaining performance.

4 investors

The page presents itself as a set of LLM-oriented documentation reminders rather than a standard marketing site. It describes a platform (formerly known as Stack Auth) offering developer apps for connecting with users, including authentication, fraud protection, teams, RBAC, API keys, payments, emails, webhooks, and analytics, delivered via SDKs for JavaScript/TypeScript, Next.js, React, and TanStack Start.

4 investors

StackOne provides infrastructure for AI agents to integrate with and act across business applications through optimized connectivity, execution, and security features. The platform serves companies and developers building AI agents into products or using off-the-shelf agents like Claude Code.

4 investors

Stainless builds open-source standards and developer tools that combine GraphQL and gRPC capabilities with REST's simplicity, targeting API developers and platform builders. The company offers a suite of developer platform products designed to deliver high-quality API experiences.

4 investors

StarSling builds AI-native continuous integration for GitHub Actions, providing fast runners and agents that analyze workflows, logs, and telemetry to automatically open pull requests optimizing CI pipelines. The platform targets software development teams seeking to reduce DevOps bottlenecks and accelerate deployment cycles.

4 investors

Statsig provides a feature management and experimentation platform that enables teams to control software releases through gradual rollouts and A/B testing. The platform serves product and engineering teams building and shipping software applications.

4 investors

Stoplight is a collaborative platform for API design that helps teams build and manage APIs at scale. The platform serves developers and engineering teams building scalable API programs.

4 investors

Strapi is a headless content management system that enables content teams to create, update, and publish website and app content without developer assistance. The platform targets business teams and developers who need faster content delivery and customizable templates across websites, apps, and IoT projects.

4 investors

Stytch provides an identity and authentication platform for applications and AI agents, offering authentication, authorization, security, and fraud protection features. The platform serves enterprise customers and developers building multi-tenant applications.

4 investors

Sudo offers an open API platform and developer tools for building financial products, letting companies programmatically create and manage physical and virtual cards and local and international virtual bank accounts. It handles compliance and bank relationships for startups building financial features, with a focus on the African region.

4 investors

Supernova provides a design system platform that supplies context and ground truth data to AI agents, enabling developers and designers to improve agent outputs while reducing token costs through scoped, updatable contexts distributed via MCP endpoints.

4 investors

SuperOps builds an AI-native platform that consolidates device management, service delivery, and client operations for IT teams and managed service providers (MSPs). The platform aims to reduce operational overhead and enable IT teams to focus on strategic initiatives rather than reactive firefighting.

4 investors

AI software-validation platform that indexes full codebases, reviews and security-checks pull requests, learns team standards, and runs changed code in sandboxes through its TREX execution agent.

4 investors

Tatum is a blockchain development platform providing RPC gateways, APIs, and webhook notifications for accessing 100+ networks. It enables developers and enterprises to build and operate Web3 applications with reliability and cost efficiency.

4 investors

Teleport is an infrastructure identity platform that modernizes identity, access, and policy for computing environments. The company helps engineering teams reduce complexity and attack surface by simplifying trusted computing for critical infrastructure.

4 investors

Telivy provides continuous risk management and vulnerability monitoring for managed service providers (MSPs), combining asset monitoring, vulnerability prioritization, and automated remediation tracking aligned to security frameworks and CIS controls.

4 investors

Terminal connects fast-growing technology companies with remote engineering talent from around the world through AI-powered recruiting and remote management services. The company builds teams of software engineers across borders, targeting startups and growth-stage firms seeking global talent.

4 investors

Terramate provides a platform for managing Infrastructure as Code that lets platform teams package reusable IaC patterns (Bundles) with built-in governance, compliance, and security, while developers and AI agents self-serve infrastructure across environments. It offers stack-based code management, orchestration, and observability with GitOps workflows for tools like Terraform, OpenTofu, and Terragrunt.

4 investors

Testsigma is a quality intelligence platform that uses AI agents to detect testing gaps at each code commit and generate self-healing automated tests across web, mobile, API, and Salesforce. It serves engineering and QA teams, scoring release confidence with a human approval step before shipping.

4 investors

The Browser Company builds web browsers, including Dia and Arc, aimed at providing new ways for people to use the internet.

4 investors

The Token Company builds a compression model called Bear-2 that reduces the size of LLM inputs such as documents, websites, and transcripts before they enter an LLM context window. The product enables developers and AI applications to pass more context with fewer tokens to language models.

4 investors

Theneo is an all-in-one developer portal platform for creating and managing API documentation, guides, and private customer portals with real-time collaboration features. The platform serves engineers, technical writers, and product managers across startups and enterprises, with built-in AI documentation generation and support for customer-specific branded portals.

4 investors