Developer Tools Startups

OKcontract Labs builds Chainwall, an onchain security layer that stores approval rules and allowlists in smart contracts and verifies that a submitted transaction's function, arguments, account, and operator match an approved action before execution. It targets treasury, protocol, vault, and smart-account teams, and also develops supporting tooling including the Cells dataflow runtime and the LambdaScript/MiniScript languages.

1 investor

Oki Home is a local AI device that stores photos, files, and personal data on-device while providing conversational AI capabilities for tasks like meeting scheduling and information retrieval. The product targets individuals seeking privacy-preserving personal AI assistance with local processing and no data leaving the device.

1 investor

Olakai provides a platform for AI governance and ROI measurement that unifies insights from coding AI tools, copilots, and autonomous agents across enterprises. The platform captures AI interactions from multiple sources, measures adoption and cost, and delivers board-ready analytics on AI productivity and business value.

1 investor

Old Street Solutions builds Custom Charts, an app for Jira and Confluence that provides no-code dashboard gadgets and macros for creating customizable charts and reports on metrics like time in status, sprint progress, and cumulative spend. The tool serves teams across agile, ITSM, marketing, and HR functions and allows sharing interactive dashboards inside and outside Jira; it is part of Tempo's product suite.

1 investor

Olive develops speech-to-text technology that preserves linguistic detail (timing, emphasis, prosody) in transcripts to address dialect bias in AI systems. The product is designed for developers building voice interfaces in high-stakes contexts like healthcare, education, and hiring, where covert racial bias in speech recognition and language models can lead to discriminatory outcomes.

1 investor

Omise AI provides payment APIs and software that let businesses accept payments and connect to multiple payment gateways, with payment orchestration for operating across regions including Asia and North America. It also offers tools for financial institutions, along with payment processing, analytics, and automation capabilities.

1 investor

Omlet offers a composable observability stack that ingests metrics, logs, and traces via OpenTelemetry and provides plug-in dashboards, serverless automation, custom visualizations, and an AI agent. It targets engineering and operations teams looking to unify infrastructure signals into a single platform with features like drag-and-drop dashboards, in-browser query/visualization code blocks, and role-based access control.

1 investor

Omniref is a community-maintained code reference for programmers, offering questions, comments, links, and documentation tied to the code libraries developers already use. It is positioned as a developer tool for the programming community.

1 investor

Treadie provides tools and utilities that extend Git functionality for software development teams, addressing workflows and tasks that Git itself does not cover.

1 investor

One of a Kind is a Tokyo-based company that operates Mansion Review, a review and information platform for apartments and condominiums in Japan, alongside web development and advertising services.

1 investor

ONE WARE provides software that automates the AI development lifecycle, from data to deployment, letting users create customized neural network models. The company holds a patent for its automatic neural network architecture creation process and targets AI performance across different hardware.

1 investor

Network Insight is an application performance monitoring solution that uses network packet mirroring and protocol analysis to provide continuous visibility into application health and user experience without disrupting production systems. It enables operations teams to detect issues early, identify affected users, and pinpoint performance bottlenecks at the network or application level.

1 investor

ONEKEY provides automated red team testing and vulnerability analysis for firmware and connected products, helping manufacturers identify exploitable security risks at scale without manual bottlenecks. The platform combines software composition analysis with exploitability context, vulnerability management, and compliance support for embedded device security.

1 investor

Oneloop provided API key issuing, authorization, usage monitoring, and security infrastructure that developers could integrate with a single line of code, including features like scopes, rate limiting, usage-based metering, and prebuilt React UI components. The company served developers building external APIs and has announced it is shutting down as of 15 September 2025.

1 investor

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

OneTriangle provides an inference optimization service that transfers KV cache between models — running prefill on a small model and decode on a large one — to reduce large language model inference costs and latency by around 20%. It also hosts and serves open-weight models like Llama, Qwen, Mistral, Gemma, and DeepSeek as a managed, private setup for teams.

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

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

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