Developer Tools Startups

Carbon Copies builds AI-based software that automates test execution, aiming to let tests run on their own.

1 investor

Cardagraph offers a studio of products that helps software and engineering leaders understand the impact of delivery changes before committing to them, so teams can plan, size work, and stay aligned when priorities or scope shift. It is used by product and engineering teams to assess delivery scenarios and improve predictability.

1 investor

Cardstack builds infrastructure for developers to create applications, leveraging blockchain technology and open-source components.

1 investor

SuperPenguin provides AI spend tracking and cost attribution software that monitors expenditure across AI models, customers, and product features. The platform integrates with major AI providers to deliver dashboards, invoice reconciliation, and cost alerts for engineering teams and finance organizations.

1 investor

Cashew Fintech Ltd is an independent IT services provider that designs and builds custom websites, browser-based applications, and workflow automation for businesses. It also offers consulting and support for choosing, implementing, and maintaining digital products.

1 investor

Libretto provides open-source CLI tools, debug agents, and browser utilities for developers to build and maintain reliable web integrations. The platform targets developers and integration engineers working on web connectivity and data exchange.

1 investor

Castari Cloud is a deployment and runtime platform for AI agents built with the Claude Agent SDK, letting developers ship agents to isolated auto-scaling cloud sandboxes with a single command. It offers features such as an MCP gateway, model routing across AI providers, and agent observability, though the company states it is winding down Castari Cloud and open-sourcing the repo.

1 investor

Castform is a self-service platform for reinforcement-learning fine-tuning of open-source models, letting engineers auto-generate training data from existing corpuses and agent traces, define tools and reward functions, and run distributed training. It targets engineers and researchers building custom RAG and agentic AI models, with pay-as-you-go pricing and exportable trained weights.

1 investor

CausewaySoft is a software development studio that builds custom websites, web and mobile apps, progressive web apps, Chrome extensions, and AI-powered features for startups, scale-ups, and small to medium-sized businesses. It offers end-to-end services from MVP development to digital transformation of legacy systems, using stacks such as React, Next.js, Node.js, and .NET.

1 investor

Caveman offers an optimization layer for AI agents that monitors live agent workloads, identifies cost and performance inefficiencies, tests potential improvements, and deploys the ones that prove effective. It serves teams running AI agents who want to reduce operating costs without degrading performance.

1 investor

CBT Nuggets provides online IT training courses and certifications covering topics from entry-level to professional, with features including virtual labs, practice exams, and interactive learning tools. The platform serves IT professionals and learners seeking to build or validate technical skills.

1 investor

Command Center is a developer workspace that runs multiple AI coding agents (Claude Code, Codex, OpenCode, and others) in a single session, with features for guided diff walkthroughs, pre-merge refactoring, and in-context feedback. It targets software developers who want to review, understand, and refactor AI-generated code before shipping, and runs locally to keep code private.

1 investor

Cedar provides sales automation software that helps account executives reduce administrative work on CRM tasks and deal management, allowing them to focus on selling for high-growth companies.

1 investor

Cedar provides an AI-native operating system (Cedar-OS) for building conversational and agentic applications, with customizable components and built-in support for tool calls and agent interactions.

1 investor

CedarDB builds high-performance database systems designed for modern hardware such as multicore processors, memory, and fast storage. Spun off from the Technical University of Munich's Umbra research project in 2024, the company develops database technology for demanding data workloads.

1 investor

Celest provides a backend development framework that lets developers write serverless functions and manage databases using Dart, the same language used in Flutter. It deploys applications to cloud infrastructure with a single command.

1 investor

Cemento provides a project management platform for construction teams that breaks down projects into micro-tasks, personalizes workflows by trade and unit, and collects analytics to predict delays and monitor subcontractor performance.

1 investor

Cenos appears to be an engineering-focused company emphasizing efficiency and sustainability, though the provided page content lacks concrete details about its specific products, services, or market focus.

1 investor

Centercode provides a user testing platform for managing beta, alpha, field, and user acceptance testing, covering tester recruitment, test planning, engagement automation, and feedback dashboards. It serves product and development teams looking to gather customer, employee, and market feedback throughout the product lifecycle.

1 investor

Cerios provides software quality services including testing, management, source-code analysis, and advisory, using tools such as test automation and quality monitoring. It works with organizations to keep IT delivery pipelines on schedule and ensure reliable software releases.

1 investor

A global business and technology services firm offering consulting, digital transformation, AI enablement, and connectivity services to enterprise clients across industries worldwide. It operates as a large IT services provider with a network of experts in over 50 countries.

1 investor

Chainspace is a distributed blockchain platform that uses sharding and leaderless consensus to enable internet-scale transaction processing and smart contract execution. The platform is designed for developers building peer-to-peer services and decentralized applications with privacy and scalability.

1 investor

Chalkable makes administrative software for private schools and nonprofit organizations. Its tools handle accountability and reporting tasks, tying curriculum records to each institution's own standards and mission requirements.

1 investor

ChannelReady is a digital media and design agency that helps teams align their digital projects and technology solutions with their business growth phases. The company evolved from MAGI Group, a web development studio founded in 1993, and specializes in interactive media delivery and design standards.

1 investor