Developer Tools Startups

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

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

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

RescueTime is a time-tracking and productivity tool that shows people how they spend their time, helps them protect focused work periods, and supports work/life balance. It is offered by a distributed company operating across the United States.

1 investor

Reshuffle is a code-centric integration platform for developers, with an open-source runtime and built-in connectors to cloud services and SaaS APIs for building custom business processes and workflows. It runs in a customer's own cloud or servers and is used for cases like marketing automation, API modernization, custom notifications, and video processing pipelines. (Reshuffle is now part of Twitter.)

1 investor

Resin Technologies builds an AI-based electronic design automation (ECAD) tool that helps engineers research designs, create schematics, generate symbols and footprints, and route circuit boards. It serves electronics and hardware engineers.

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

Restlet Framework is an open source Java API, launched in 2005, for building REST-based API clients and servers that closely follow REST architecture and the HTTP protocol. It runs directly in JVMs with minimal dependencies, offering routing, security, and extensions suited to microservices.

1 investor

Result is an operating system that helps entrepreneurs start and run businesses, offering tools for app development, payments, marketing, customer support, business analytics, legal incorporation, product design, market research, performance optimization, fundraising, and integrations with third-party services.

1 investor

Resultant is a consulting and technology services firm that helps organizations with technology strategy, data analytics, digital transformation, and custom application development. The company serves enterprises seeking to modernize operations and solve complex business problems through collaborative advisory and implementation services.

1 investor

Retrace is an open-source record-replay tool and AI debugger for Python that captures failed pytest and CI runs as replayable .retrace artifacts, letting an AI debug backwards from real runtime values to the root cause. It targets developers and coding agents debugging CI failures, flaky tests, and production crashes, with verification in VS Code.

1 investor

Rev AI provides a developer-first speech-to-text API delivering machine-generated transcripts from pre-recorded files or real-time audio streams across 57+ languages. It also offers voice AI insights such as sentiment analysis, topic extraction, summarization, and translation for developers and enterprises.

1 investor

REV1 develops AI-powered software that automatically converts 3D CAD models into production-ready 2D engineering drawings with geometric dimensioning and tolerancing annotations for mechanical engineers.

1 investor

Revyz builds enterprise-grade tools for Atlassian Cloud administrators, providing configuration deployment management and data protection (backup) for Jira and Confluence environments. The company was acquired by data security firm Spin.AI in 2026, extending SaaS data protection and configuration management across Atlassian, Google Workspace, Microsoft 365, Slack, and Salesforce.

1 investor

VitalStrata provides AI software to help managed care organizations improve the accuracy of risk adjustment coding and documentation, making their operations more resistant to audit scrutiny.

1 investor

RICOS develops computational science and machine learning technology to identify and visualize manufacturing challenges, helping companies optimize design and product development processes. The company serves manufacturing organizations seeking to accelerate processes through scientific analysis and simulation-based AI.

1 investor

Rig.dev built a developer experience and application layer for Kubernetes aimed at enterprises. The company's IP was acquired by Harness and its team joined Harness to work on software delivery.

1 investor

RunInfra benchmarks machine learning models and serving engines across different GPUs, provides real performance measurements (latency, throughput, cost), and delivers a deployment-ready kit that runs on the user's choice of cloud infrastructure. The platform serves machine learning engineers and teams building inference workloads who need transparent, portable model deployment options.

1 investor

Rilevera builds a platform that uses AI to assist detection engineering teams in creating and managing security rules, enabling organizations to achieve comprehensive threat coverage without sacrificing rule quality.

1 investor

Rindler provides a platform that enables AI agents to reliably navigate and interact with any website, offering infrastructure for deterministic web access. The platform serves developers and organizations building AI agents that need to automate work across web-based systems.

1 investor

Rinstack is an AI-powered platform for building and managing cloud infrastructure, letting users generate Terraform-based infrastructure from natural language, run cost and security reviews, and deploy via CI/CD. It supports multiple cloud providers (AWS and Sakura Cloud, with Azure, GCP, and Oracle Cloud planned), integrates with Slack, and includes learning content aimed at users without infrastructure expertise.</parameter> <parameter name="founders">[]

1 investor

RISE Chain is a high-speed Ethereum Layer 2 blockchain offering roughly 1ms latency and over 50K TPS through a continuous block pipeline and preconfirmations. It provides native orderbooks (via MarketCore) and shared liquidity as EVM primitives, targeting onchain financial applications and trading.

1 investor

Rivet is a visual editor that lets product designers make UI changes and commit them directly to code, reducing the need for designer-engineer collaboration.

1 investor

Roadie builds AI agents that respond to on-call alerts by pulling logs, metrics, traces, and related signals to identify root causes and surface findings for engineering teams. It targets software/DevOps and incident-response workflows.

1 investor