Developer Tools Startups

Refresh builds simulation environments and evaluation benchmarks for frontier AI labs to measure and improve model capabilities. The company focuses on creating realistic, production-grade testing environments that accurately assess AI system performance.

1 investor

Reftab provides cloud-based IT asset management software that lets IT teams track hardware, software licenses, equipment, maintenance, and IT spend from one platform instead of spreadsheets. It integrates with MDM, RMM, HR, and identity tools and serves industries including technology, education, healthcare, non-profit, and construction.

1 investor

ReJot is an open-source software development platform or toolkit. The page provides limited concrete details about its specific offerings or target customers.

1 investor

RELAI builds a continual learning infrastructure system that enables AI agents to improve themselves through experience by converting failures and feedback into continuous optimization across prompts, tools, memory, and models.

1 investor

Relari builds an AI development platform called Nuvi that enables developers to define intelligent agents in plain English without prompt engineering or visual programming. The platform creates testable, verifiable AI agents designed for production deployment.

1 investor

Released is a software company that builds Jira-native products for product teams to plan work, collect customer feedback, publish audience-specific roadmaps, and turn completed Jira work into release notes. Its products include Hub and BetterBoard, both built on top of Jira as the source of truth.

1 investor

Relvy provides AI-assisted debugging tools that help software engineers investigate system incidents and identify root causes, with automatic analysis for many alerts and manual guidance options when needed.

1 investor

remio is an AI assistant that automatically captures and synthesizes knowledge for software engineers, helping them manage fragmented technical information across multiple sources and retrieve insights on demand.

1 investor

Remix is a full-stack JavaScript web framework that provides server, router, data layer, UI components, and testing capabilities for building web applications. The framework supports both human developers and AI agents in creating anything from simple projects to complex business applications.

1 investor

Remotebase is a development studio that builds custom AI products for businesses on a fixed scope, price, and timeline, delivering from idea to production in around 30 days. It has built projects such as an AI-powered, blockchain-based insurance product and a DAO-based pet insurance platform for enterprise clients.

1 investor

Remotion is a multiplayer collaboration app for software teams that offers simultaneous screensharing for up to 10 people, shared cursors and control, keyboard-first commands, and AI-generated session summaries and action items. It integrates with tools like Linear, Raycast, and Slack and is built on Zoom's audio/video infrastructure.

1 investor

Renatus.ai offers a local-first AI agent orchestration platform that lets users deploy and manage autonomous AI agents from their own devices, with agents able to connect to crypto wallets, launch their own tokens, and manage their own wallets. The product is presented as private and self-hosted, running directly on the user's PC.

1 investor

Rencom develops custom AI models trained on a company's proprietary data and deploys in-house AI agents for enterprise clients. It focuses on building tailored frontier models and autonomous agents for organizations.

1 investor

Renderlet provides a procedural 3D modeling platform that enables developers and artists to create complex 3D designs, shapes, and animated effects by combining functions and primitives. The toolset supports real-time generation for game engines, applications, and other digital projects, with AI that maintains the semantic structure of procedurally generated content.

1 investor

1 investor

Repaint is an AI-powered website builder that reconstructs existing websites by importing content and design, then allows users to modify layout, content, and styling through a chat interface. The platform serves small businesses and professionals who want to redesign their websites without manual rebuilding work.

1 investor

Replay provides a software debugging and testing platform that records and replays the full runtime state of code, enabling both developers and AI coding agents to pinpoint failures and fix bugs without guessing. The platform serves developers, AI agents, and engineering teams building with code.

1 investor

Lingo.dev is a localization API platform that embeds translation and multilingual content management directly into product development workflows. It serves software engineering teams building multilingual products, automating translations for 36+ languages while maintaining glossary consistency, brand voice, and quality scoring across locales.

1 investor

Replicas provides a background coding agent that delegates development tasks to sandboxed coding environments, enabling developers to automate routine code changes and integration work.

1 investor

Reploy automatically generates temporary staging environments for web applications with each pull request, allowing development teams to preview and share code changes without manual setup.

1 investor

Requestly is a Git-native API client for teams to design, build, and test APIs in a single local-first application. It serves software developers at Fortune 500 companies and offers features like REST and GraphQL support, environment management, and collaboration tools with enterprise-grade security.

1 investor

RescueTime provides automatic time tracking and productivity management software for individuals and teams, with tools for focus management, distraction blocking, and project/timesheet automation.

1 investor

ReSim provides a simulation and testing platform for physical AI and robotics teams, letting them evaluate embodied AI performance across thousands of virtual scenarios before deployment. It integrates with tools like GitHub, GitLab, Foxglove, and Isaac SIM to enable continuous testing and regression detection in AI development workflows.

1 investor

Resolve Tech Solutions helps organizations modernize their enterprise systems and operations through expertise in SAP, cloud infrastructure, and AI technologies. The company provides managed services and transformation consulting to enable digital enterprise capabilities.

1 investor