Developer Tools Startups

RethinkDB is an open-source, scalable database for the realtime web that pushes updated query results to applications continuously instead of requiring polling. It provides a query language with features like table joins and groupBy, a parallelized architecture, and web-based cluster management tools for developers building realtime apps.

2 investors

ReversingLabs provides a cybersecurity platform for software supply chain and file security, analyzing and deconstructing software binaries to detect risks. It serves enterprises including Fortune 500 companies and cybersecurity vendors across software, banking, defense, retail, and insurance sectors, with its Spectra Core tracking over 40 billion searchable files daily.

2 investors

Rhino.fi builds stablecoin and digital money infrastructure used by global financial products. The company provides reliable systems combining technology, fintech, security, and growth expertise for financial applications.

2 investors

Riften provides a routing layer that sits between a company's applications and large language model APIs, directing each request to the least expensive capable model and using self-hosted open-weight models where possible to reduce inference costs. It also uses the resulting task data to train private, company-owned models on recurring work, serving businesses that run AI-powered applications.

2 investors

Riptides provides identity, access control, and audit trails for AI agents and traditional workloads, enforcing security at the Linux kernel level so workloads receive short-lived, just-in-time credentials instead of holding long-lived API keys. It targets security and platform teams and integrates with existing secret stores, cloud IAM, and observability tools via SPIFFE, Kubernetes metadata, and federation with AWS and GCP.

2 investors

Rivet provides infrastructure for AI agents and realtime applications, offering stateful compute primitives called Actors that run in Node.js or Bun backends. The platform supports deployment options ranging from local libraries to fully managed cloud services or self-hosted environments with compliance features like air-gapped and on-premises support.

2 investors

Rollup provides software and workflows designed to accelerate the development and iteration of complex hardware systems across industries including aerospace, robotics, and nuclear technology.

2 investors

Rome is blockchain infrastructure that runs sovereign EVM chains on Solana, providing shared security, atomic composability, and standard Ethereum tooling. It serves institutional token issuers, app teams, and Solidity developers with components including an oracle gateway, per-app EVM chains, a transfer-hook router, and RWA settlement with on-transfer compliance.

2 investors

Root is a community platform offering modular apps—including a task tracker, event/raid planner, and social reaction tools—that let communities coordinate tasks, plan events, and build shared culture. It also provides a developer platform for building apps that run directly on Root without hosting, scaling, or security overhead.

2 investors

ROUTE06 builds AI-driven development platforms (Acsim, Giselle, Liam) and provides consulting, enterprise system development, and DX support services for large companies. It focuses on generative AI and AI agent technology for digital transformation in Japan.

2 investors

Rubic is a cross-chain and privacy aggregator that enables any-to-any crypto swaps and bridging across 70+ blockchains by aggregating 340+ DEXs, bridges, and intent protocols. It offers API/SDK tools for Web3 dApps to build their own crypto exchanges, along with private, no-KYC swap functionality for traders.

2 investors

RunesTerminal is a platform that provides tools for the Runes ecosystem, including a block explorer, token creation utility, and project launchpad. It serves developers and teams building on the Runes Protocol by offering development resources, funding access, and community connections.

2 investors

Runlayer builds a trust and safety layer that enables enterprises to deploy AI agents and integrations across their organizations securely. The platform makes enterprise AI adoption manageable by providing control and safety guardrails between enterprises and their AI infrastructure.

2 investors

RunWhen builds AI-powered tools and workflows for engineers to automate incident response, infrastructure management, and operational tasks across diverse technology stacks including cloud platforms, Kubernetes, databases, and mainframes. The platform enables teams to rapidly deploy thousands of specialized engineering tools tailored to their specific applications and infrastructure.

2 investors

Rye offers a Universal Checkout API that lets AI agents complete purchases on any web store, using AI browser automation with fraud-mitigation techniques to get past merchant checkout systems and return landed costs and completed orders. It targets developers building agentic commerce applications.

2 investors

Safety provides endpoint security and visibility for AI-powered development environments, helping security teams monitor and govern AI tools, packages, MCP servers, and IDE extensions across developer machines. The platform deploys agentlessly via MDM and detects malicious packages and vulnerabilities in software ecosystems like npm and PyPI.

2 investors

Sage AI automatically generates and maintains documentation for codebases by building a symbol-level knowledge graph from source code and using large language models to create and update annotations. The platform serves software engineering teams seeking to reduce onboarding time, improve code comprehension, and preserve institutional knowledge.

2 investors

Salto provides a configuration management platform that captures the settings of business applications like Salesforce, Zendesk, NetSuite, and Jira as version-controlled code, with review, validation, and deployment workflows. It serves enterprises, enabling AI agents and humans to implement changes across these applications with context, deterministic checks, human approval, and an audit trail.

2 investors

SBX Robotics creates synthetic training images for robot computer vision systems using simulation, enabling companies to generate large labeled datasets from minimal seed imagery at a fraction of traditional annotation costs.

2 investors

Provides developer tools and SDKs for the Nx video management system (Nx EVOS/Nx Meta), including a RESTful HTTP Server API, a Metadata SDK for integrating third-party video analytics, Video Source and Storage SDKs, and the Nx AI Manager for deploying AI/ML models. Serves developers, OEMs, resellers, and software vendors building video analytics and camera integration solutions.

2 investors

Scalekit provides OAuth integration and token management infrastructure for AI agents to authenticate and securely access third-party applications like Gmail, Slack, Salesforce, and 100+ others. The platform handles delegated OAuth flows, credential storage, and tool execution on behalf of users, enabling agents to take actions within target apps using user-specific permissions.

2 investors

Scaphold is a GraphQL-as-a-service platform for developers, offering backend services such as push notifications, analytics, file storage, custom code, and multiple environments to build mobile, web, and IoT applications.

2 investors

ScatterSpoke provides an AI-powered insights engine that integrates with existing development tools to analyze qualitative and quantitative data from agile retrospectives, helping software engineering teams identify bottlenecks and optimize workflows. It serves software development organizations looking to turn team feedback into data-driven improvements.

2 investors

Sceenic builds "Watch Together" SDKs (tvOS, iOS, Android) and technology that lets viewers watch live TV and streaming content together in sync while socially connected. It serves broadcasters and streaming operators such as BT Sport, PCCW/NOW TV, LaLiga, and NPO.

2 investors