Developer Tools Startups

Cronofy provides a scheduling and calendar infrastructure layer that unifies availability control, coordinates the scheduling lifecycle, and surfaces meeting intelligence for teams, SaaS products, and AI agents. It serves over 180,000 businesses worldwide and can be embedded in software or used directly by teams.

3 investors

Crowdbotics (now CoreStory) offers AI-based tools to analyze how existing software systems work, aimed at software modernization and maintenance. The company focuses on transforming the software development lifecycle for engineering teams.

3 investors

Develops software tools for researchers to conduct scientific analysis and answer biological research questions. The company focuses on making research tools accessible and scalable for scientists.

3 investors

A full-stack engineering team that builds, tests, and ships SaaS products with roles spanning architecture planning, backend APIs, frontend UI, and QA testing.

3 investors

Cube provides a semantic layer that lets data teams define metrics, dimensions, joins, and access rules once and serve them to dashboards, embedded analytics, and AI agents through SQL, REST, GraphQL, MCP, DAX, and MDX APIs. It offers code-first and visual data modeling tools so data engineers and analysts collaborate on a single set of governed metric definitions.

3 investors

Cycle Labs offers Cycle®, an end-to-end test automation platform that uses a human-readable scripting language (CycleScript) to automate regression, volume, and load testing across enterprise supply chain systems such as ERP, Warehouse Management, and Order Management systems. It provides prebuilt test libraries for platforms like Blue Yonder and Infios WMS and serves enterprises including Fortune 500 companies across industries such as food distribution and automotive manufacturing.

3 investors

d_model develops reinforcement learning environments that train AI agents to conduct interpretability and alignment research on frontier language models. The company partners with AI labs to build agents capable of performing cutting-edge AI safety research rather than optimizing for reward signals.

3 investors

Dagger provides a platform for test orchestration with a runtime, system API, and SDKs across multiple languages. It serves developers building and automating end-to-end tests.

3 investors

Dappier operates an agent storefront that publishes prices, payment instructions, and setup so AI agents can purchase autonomously or with human approval. The storefront supports multiple payment methods, lets agents set up a payment method instantly without signup, and handles payments directly rather than requiring API calls.

3 investors

Darklang is a programming language and development platform designed to build CLIs and cloud applications with minimal complexity. It eliminates traditional development infrastructure requirements like build systems, dependency management, deployment pipelines, and database configuration.

3 investors

DBeaver develops database management software with a professional SQL editor for exploring, administering, and migrating data across 100+ SQL, NoSQL, and cloud data sources. It offers desktop, web (CloudBeaver), enterprise, and team editions for developers, DBAs, data analysts, and business users.

3 investors

DBOS provides an open-source library that adds durable workflows and queues to applications and AI agents, making them fault-tolerant, observable, and reproducible by connecting to a Postgres database with no new infrastructure. It targets developers, AI engineers, and SREs building reliable AI applications, with native integrations for agent frameworks like Pydantic AI, LlamaIndex, and the OpenAI Agents SDK.

3 investors

Decent provides a framework for launching and operating crypto tokens with onchain contracts, warrants, regulatory compliance structures, and audited open-source smart contracts designed to protect investors. It serves web3 founders and tokenholder communities seeking transparent, compliant token launches.

3 investors

deepset builds Haystack, an open platform for creating, running, and governing AI agents and retrieval-augmented generation (RAG) applications, with an open-source foundation and an enterprise platform. It targets enterprises and governments in regulated, high-impact environments, offering cloud or self-hosted deployment with audit logs, RBAC, and data lineage.

3 investors

DeepSource provides developer tools for code quality and security. The platform serves developers and engineering teams at startups and large enterprises.

3 investors

DeepWeave builds Loom, an AI-native optimization platform that augments the backend (physical) design stage of chip design, targeting power, performance, area, and yield through design-technology co-optimization within existing EDA flows. It serves semiconductor design teams and fabless companies and works alongside their existing toolchains and PDKs, with design partnerships including GlobalFoundries.

3 investors

Defense Unicorns delivers secure, vendor-lock-free software deployment solutions for the U.S. Department of Defense and mission-critical environments. The company helps government agencies and system integrators accelerate software delivery in air-gapped and classified networks while maintaining security compliance.

3 investors

Delphinus Lab builds ZKWASM, a zero-knowledge proof system that compiles WebAssembly application logic into provable computations, and operates zkwasmhub for hosting ZKWASM decentralized applications. It targets developers building provable dapps and games on blockchain infrastructure.

3 investors

Derapi offers a universal API that connects to distributed energy resources (DERs) such as solar, storage, HVAC, EV chargers, and appliances, replacing bespoke in-house integrations with a single connection. It serves DER software developers—including DERMS, VPP, energy management, and monitoring platforms—as well as DER device manufacturers.

3 investors

SDSA develops a developer platform and UI patterns to enable agentic AI applications that can assist users in their daily software interactions through a reimagined privacy model.

3 investors

DevCycle is a feature management and flagging platform that helps software development teams control feature releases, run experiments, and deploy faster with reduced risk. The platform is designed for developers and engineering teams building applications.

3 investors

Devtron is a Kubernetes-native platform that combines CI/CD, GitOps, observability, and security to manage software delivery. It serves development and DevOps teams at startups and enterprises adopting cloud-native practices.

3 investors

Diagrid provides a platform for building and running mission-critical workflows and autonomous AI agents on distributed systems, serving developers and enterprises building cloud-native applications.

3 investors

Popul8 provides character creation automation software that generates and customizes game characters and crowds with dynamically fitting assets. The tool serves game developers and studios by enabling rapid creation of fully-rigged NPCs and character variations for game engines including Unreal and Unity.

3 investors