Developer Tools Startups

One Source is a technology advisory firm that helps clients develop and execute digital transformation strategies. The company serves enterprise clients navigating technology landscape changes.

1 investor

OneVisage develops biometric authentication technology and OEM solutions aimed at preventing digital identity theft and phishing attacks. Its solutions are sold to large IT integrators, hardware manufacturers, cybersecurity vendors, and Identity & Access Management providers.

1 investor

OnFinality provides enterprise-grade Web3 infrastructure services including RPC endpoints, blockchain indexing, and dedicated nodes for developers and enterprises building on multiple blockchain networks. The platform abstracts away blockchain DevOps complexity to enable teams to scale applications across 130+ supported networks.

1 investor

Parallel provides a tool to simplify information collection from customers by automating requests and reducing the friction of gathering documents and details needed to begin work engagements. The platform targets professionals and service-based businesses that frequently need to collect multiple pieces of customer information.

1 investor

On Second Thought builds a delay/recall platform delivered as SDKs and APIs that developers embed into messaging and peer-to-peer payment applications, letting end users "undo" sent messages or misdirected payments. Its products OST Undo and OST Money serve companies operating mobile and desktop messaging or payments platforms.

1 investor

OnSecurity provides AI red teaming and penetration testing services to identify vulnerabilities in large language models and AI-powered applications. The company combines manual expert testing with automation to uncover prompt injection attacks, data leaks, API weaknesses, and unsafe model behaviors in AI systems.

1 investor

OnSpace is a no-code AI app builder that lets users create mobile and web applications with a managed backend (database, authentication, edge functions, logs) and built-in Stripe payment integration. It targets creators and non-technical builders who want to ship apps without DevOps, including via a mobile creator app.

1 investor

Onymos offers DocKnow, a document and data processing platform for clinical laboratories that captures, validates, and enriches intake documents such as test requisition forms and medical records. Deployed within the lab's own infrastructure, it uses AI to extract structured and unstructured data, flag conflicting information, run eligibility checks, and maintain audit and compliance records.

1 investor

Onyx is an open-source application platform for large language models that enables teams to leverage any LLM while maintaining data transparency and customization. The platform integrates internet search, internal knowledge connectors, code execution, and model context protocol integrations to provide enterprise and startup teams with flexible AI deployment options.

1 investor

Onyx provides an AI agent and CLI that runs parallel agent teams against a company's existing codebase to automatically discover and test code improvements for hardware and robotics systems. It integrates with existing repositories, simulators, and hardware testing workflows, tracking experiments as Git commits with stored metric data so results compound across teams.

1 investor

Opal is an app that automatically manages technology usage by allowing users to block distracting apps on phones and desktops while tracking focus, sleep, and rest metrics to promote digital wellness and productivity.

1 investor

Open builds AI systems for customer communication and support that automate ticket resolution, quality assurance, and customer insights in a single unified platform. The company serves businesses looking to consolidate fragmented customer service operations.

1 investor

A no-code platform that converts spreadsheets and existing data into business applications, allowing non-technical teams to rapidly develop and deploy apps without IT involvement. The platform is designed for enterprises seeking citizen development capabilities, data management, and cross-device app deployment with built-in security and access controls.

1 investor

OpenBB built financial infrastructure software and platforms for investment research, including a terminal, SDK, workspace, copilot, and Excel add-in, serving buy-side and sell-side financial institutions and individual analysts. The company has transitioned to open-sourcing its product suite under a permissive license after being unable to achieve sustainable commercial product-market fit.

1 investor

OpenBuilder provides a backend platform and visual debugging tools for developers to build applications without per-message costs. It offers OAuth and API integrations with third-party services including documentation, payment, CRM, email, and Slack.

1 investor

OpenClaw is an open-source, self-hosted AI agent that runs on a user's own machine and performs personal tasks such as organizing email, sending messages, managing calendars, and checking in for flights, controlled through chat apps like WhatsApp and Telegram. Aimed at individuals and technical users who want a hackable personal assistant they control, it runs on macOS, Linux, and Windows and supports custom skills and plugins.</parameter> <parameter name="founders">[{"full_name": "Peter Steinberger", "title": "Creator", "twitter_handle": "steipete"}]

1 investor

OpenCode is an open-source AI coding agent that assists developers with writing code across terminal, IDE, and desktop environments. It supports multiple LLM providers and prioritizes user privacy by not storing code or context data.

1 investor

OpenComputer is an open durable runtime for AI agents, running each session on a persistent virtual machine with full OS access that hibernates when idle and resumes with state intact after crashes or redeploys. It offers agents-as-code deployment, checkpoints, and elastic VMs for developers building on harnesses like Claude Agent SDK and OpenCode.

1 investor

OpenCV is a computer vision library that provides GPU-accelerated functionality for image processing and parallel computations. It enables developers to run vision algorithms on NVIDIA CUDA-enabled graphics processors while maintaining consistency with its CPU-based implementation.

1 investor

OpenHome is an open platform and SDK for building private, on-device AI voice agents, providing developers an OS, local models, sensor layer, voice SDK, and DevKit to create ambient AI applications that run locally on the OpenHome DevKit or Linux-based hardware. It targets developers and OEMs building voice-enabled devices for uses such as medical transcription and smart home control.</parameter> <parameter name="founders">[]

1 investor

OpenInt provides a platform for teams to build product integrations quickly using no-code or low-code tools, offering unified APIs for data operations or direct database synchronization.

1 investor

OpenMake Software makes Meister, a build automation tool that produces repeatable, secure software compiles using a declarative model, with features such as SBOM build audits, dependency scanning, build acceleration, and CI/CD integration. Aimed at large enterprises and originally serving the financial sector, it addresses software supply chain security within the DevOps ecosystem.

1 investor

OpenMeter provides usage-based billing infrastructure for developers, enabling real-time metering of events, logs, and metrics to support consumption-based pricing models. The platform integrates with CRMs, payment providers, and popular programming languages to help SaaS companies implement flexible pricing strategies and maximize revenue through usage insights.

1 investor

OpenOcean is a pan-European early-stage venture capital firm investing in European-founded companies developing AI-native software, automation, and data-intensive technology to reshape knowledge work. The firm typically leads or co-leads Seed and Series A rounds with initial tickets up to €5m.

1 investor