Developer Tools Startups

Resend provides an email sending platform for developers to build and send modern email templates that reach the inbox reliably. The platform addresses the technical challenges of email delivery across different email clients.

4 investors

Rootly provides AI-powered on-call and incident management software that integrates with Slack and Teams to help engineering and SRE teams page, schedule, diagnose, and resolve incidents faster. It also offers automated status pages and post-incident analysis for teams that require high system availability.

4 investors

Routefusion offers a single API for cross-border payments, letting platforms send payments to 180+ countries, open accounts in 12 currencies, and access FX, SWIFT, and local pay-in/payout infrastructure. It serves fintechs, platforms, and marketplaces building global payment operations.

4 investors

Rubie provides authentication infrastructure for enterprise workflows, handling login patterns and credential management across diverse authentication systems.

4 investors

Runloop builds simulation environments for DeFi that train autonomous agents to identify trading opportunities, provide liquidity, and manage risk. The platform serves cryptocurrency traders and developers seeking to leverage compute-driven automation in decentralized finance.

4 investors

RunRL offers a platform for improving machine learning models using reinforcement learning. The product is announced as coming soon.

4 investors

Runtime Verification provides high-assurance cybersecurity consulting based on formal methods for teams building software that cannot fail. It also develops verification tools for smart contract and Web3 development, including formal verification for Foundry, Solidity, and Soroban contracts, along with fuzzing, symbolic execution, and debugging tools.

4 investors

Ryvn provides infrastructure and platform software for enterprises operating mission-critical systems in healthcare, finance, defense, and other high-consequence domains. The company enables organizations to deploy and manage software at scale across isolated customer environments.

4 investors

Safepay is a Payment System Operator and Provider Service Provider licensed by Pakistan's State Bank that enables Pakistani businesses to accept payments and integrate into the global economy. The platform serves merchants across Pakistan.

4 investors

Saphira automates functional safety analysis, risk modeling, and compliance evidence generation for hardware and robotics teams. The platform generates HARAs, TARAs, FMEAs, and safety cases to help companies meet ISO and regulatory standards before certification review.

4 investors

Sarvam AI develops a full-stack AI platform designed for India, providing foundational AI models and tools accessible to enterprises, governments, developers, and startups. The company focuses on building AI systems that understand Indian languages, context, and problem-solving approaches.

4 investors

Sauce Labs offers an AI-driven software testing and release assurance platform that authors, runs, and analyzes tests across web and mobile using autonomous agents with human oversight. It serves enterprise engineering teams and provides on-demand access to real devices, emulators, and simulators, integrating with common IDEs, CI/CD pipelines, and test frameworks.

4 investors

ScaleOps provides application context-aware automation for horizontal pod scaling in Kubernetes, dynamically managing replica counts and predicting traffic to scale ahead of demand. It integrates with existing HPA and KEDA definitions and is aimed at DevOps and platform teams looking to cut cloud costs while maintaining performance and reliability.

4 investors

Scope is a platform that helps software products become discoverable and usable by AI agents through monitoring how agents interact with products, analyzing their behavior and errors, and recommending improvements. It targets product teams and businesses that want to ensure their products work seamlessly when used by autonomous AI agents.

4 investors

Sculpt develops AI models fine-tuned to read manufacturing drawings and extract details such as materials, standards, dimensions, tolerances, and operations for precision manufacturers.

4 investors

Webscale provides cloud hosting, application delivery, and security infrastructure that sits beneath ecommerce platforms like Adobe Commerce, Magento, and Shopware, along with an AI product suite for first-party data and shopping assistance. It targets mid-enterprise commerce brands running open-source and enterprise ecommerce stacks.

4 investors

Sentinel is a blockchain-based protocol and SDK for building decentralized VPNs, where node discovery, sessions, payments, and bandwidth run on-chain across a network of independent node operators. It provides a white-label stack for developers to launch branded dVPN applications and for operators to host nodes and earn bandwidth rewards.

4 investors

Setu provides APIs, SDKs, and pre-built screens that let businesses embed fintech services such as KYC verification, eSign, account aggregation, UPI payments, and bill payments (BBPS). It targets lenders and businesses building financial services in India, operating in the fintech infrastructure category.

4 investors

SHOPLINE is a SaaS provider that offers unified commerce solutions including e-commerce, social commerce, point-of-sale, and customer relationship management tools for retailers. The platform serves over 600,000 merchants globally with a focus on helping businesses sell, market, and operate across multiple channels.

4 investors

Shuttle is an open source cloud platform for developing and deploying web applications with Rust, replacing container technology with a lightweight alternative to achieve sub-second deploy times. It targets backend developers seeking faster development cycles and simplified cloud infrastructure management.

4 investors

Sieve creates high-quality multimodal datasets and training environments for frontier AI labs developing generative media, robotics, and agentic systems. The company combines exabyte-scale infrastructure with novel data collection and processing techniques to serve AI research teams and enterprise customers.

4 investors

Simplyblock provides software-defined block storage built on NVMe-over-TCP and the Storage Performance Development Kit (SPDK), delivering low-latency, scale-out storage on standard x64 and ARM64 hardware. It serves infrastructure and platform teams across environments such as VMware, Proxmox, Kubernetes, and cloud, supporting hyper-converged, disaggregated, and hybrid deployment models.

4 investors

Single Origin builds data infrastructure tooling that analyzes and optimizes queries and pipelines to reduce compute costs and improve engineering productivity for data teams. It focuses on query engine analysis, parsing, and query debugging and optimization across diverse query engines.

4 investors

MariaDB provides an open source relational database and a fully managed cloud database service supporting private, public, hybrid, and multicloud deployments, with features including columnar analytics, JSON functionality, and Oracle compatibility. It serves over 700 business customers worldwide as a lower-cost alternative to legacy database systems like Oracle.

4 investors