Developer Tools Startups

CopilotKit provides an open-source framework and protocol (AG-UI) for developers to build and embed AI agents with rich, interactive user interfaces directly into applications, including web, Slack, and Teams. The platform enables seamless integration of generative UI and agentic functionality for enterprise and consumer applications.

8 investors

Prove AI provides observability and auditing tooling for multi-agent AI systems, letting AI engineers trace how and why agents reach decisions, evaluate outcomes at runtime, and replay candidate fixes against trace archives to catch regressions. It aims to make AI outcomes explainable, traceable, and cost-efficient while keeping a human in the loop.

8 investors

Urbit is a personal server platform designed for self-hosting, giving users full control over their data and infrastructure. It positions itself as a simple-to-maintain system with multiple hosting options across varying technical requirements.

8 investors

Transcelestial builds laser communication technology that delivers high-speed internet connectivity using compact wireless optical devices as an alternative to fiber. It targets telecom operators and enterprises needing broadband and network backhaul infrastructure.

8 investors

Ubiquity6 develops multiplayer technology and infrastructure for shared, collaborative experiences. The company was acquired by Discord.

8 investors

Vela is a platform that integrates AI tools with proprietary data to provide insights and centralize management for ecommerce sellers across multiple platforms and channels.

8 investors

Vungle, part of Liftoff, provides mobile performance marketing, app monetization, and creative solutions built on Cortex, an AI/machine-learning growth platform. It serves mobile app developers and marketers looking to acquire users, generate ad revenue, and gain app market insights.

8 investors

XMTP is an open-source, decentralized messaging protocol that enables secure communication and payments between people and agents without intermediary control. It provides quantum-resistant encryption, supports multiple identity models, and integrates digital currencies into messaging experiences.

8 investors

XTEND develops AI-powered operating systems and mission platforms for unmanned aerial and ground systems, enabling single operators to command and autonomously coordinate multiple assets across military and defense operations. The company serves defense organizations and tactical teams requiring reliable autonomous coordination in complex environments.

8 investors

OpenZeppelin builds open-source smart contract libraries and provides security audits for blockchain and onchain financial infrastructure. Its products, including OpenZeppelin Contracts and the Ethernaut, are used by developers building stablecoins, tokenized funds, and other secure smart contract applications.

8 investors

A.Team assembles vetted senior technical talent (ML engineers, data engineers, and specialists) into on-demand teams matched via AI to client specifications. The platform manages team scaling, contracts, and payroll to enable rapid project delivery without lengthy hiring cycles.

7 investors

Splashtop is a remote access and support platform that enables users to securely access and control computers from any device with high performance, up to 4K quality at 60fps. The company serves IT teams, businesses, and individuals needing reliable remote work, learning, and support capabilities.

7 investors

Activeloop provides a data infrastructure platform that indexes, searches, and organizes multimodal data (documents, images, videos) for AI applications through its Deep Lake database and search capabilities. The platform serves enterprises and organizations building AI systems that require efficient access to large-scale unstructured data.

7 investors

AltLayer provides infrastructure and autonomous agents for building intelligent applications on decentralized blockchain networks, including services for AI model access, DeFi integration, and rollup deployment.

7 investors

Antithesis provides deterministic simulation testing software that automatically finds and reproduces bugs in mission-critical software systems. The platform helps engineering teams in tech companies reduce production defects and accelerate development cycles for distributed systems and complex software.

7 investors

Anyscale provides a platform for building and deploying machine learning and AI applications at scale, enabling developers to run applications from laptops to data centers without managing underlying infrastructure.

7 investors

Cosmos is a unified AI agents platform that enables enterprise development teams to automate software development workflows at scale, improving engineering throughput and reducing time-to-merge through intelligent agent coordination and codebase understanding.

7 investors

Aurora Labs develops AI technology for understanding and managing complex embedded systems, AI infrastructure, and data-center environments. The company serves developers and technology teams across automotive, IoT, and data infrastructure sectors.

7 investors

Authy provides a two-factor authentication (2FA) app that protects user accounts from unauthorized access by requiring device-based identity verification. The service enables individuals to secure their online accounts across various platforms against hackers and account takeovers.

7 investors

Bito offers AI Architect, a tool that builds a knowledge graph from a company's code, commits, issues, and docs to provide system context for coding agents across technical design, code generation, and pull request reviews. It targets enterprise engineering teams and integrates with coding agents and issue trackers such as Cursor, Claude Code, GitHub Copilot, and Jira.

7 investors

Bluesky is a social media platform built as a Public Benefit Corporation. The page does not provide sufficient detail about the company's specific operations, customer base, or business model to construct a more detailed description.

7 investors

Browser Use provides AI-powered browser automation infrastructure with anti-detection capabilities, CAPTCHA solving, and custom LLMs designed for web-based agent tasks at scale.

7 investors

Cast AI provides an automation platform for Kubernetes that turns workload, infrastructure, cost, and SLO signals into automated actions such as pod rightsizing, node scaling, GPU and Spot optimization, and issue remediation. It serves platform, SRE, and FinOps teams running EKS, AKS, GKE, or on-prem clusters to improve performance, reliability, and cost.

7 investors

Citus is a Postgres extension that enables horizontal scaling of databases by distributing data and queries across multiple nodes. It serves SaaS applications, real-time analytics platforms, and microservices architectures that need to scale transactional and analytical workloads on a single distributed database.

7 investors