Developer Tools Startups

Loophole Labs is a systems infrastructure company that builds Architect, a Kubernetes platform for pod hibernation and live migration of workloads across nodes, zones, and clouds to avoid spot instance preemption and cold starts. It also offers AGX, an agent sandbox platform for running untrusted code on an in-house hypervisor, serving engineering and infrastructure teams.

2 investors

Lottielab is a tool for creating and editing Lottie animations, with support for importing assets from design tools and shipping animations to apps and websites. It targets designers and developers working with animated graphics across web and mobile platforms.

2 investors

Luciq provides agentic AI-powered observability for mobile applications, automatically detecting, diagnosing, and resolving issues before users are impacted. The platform serves mobile development teams seeking proactive quality management and autonomous issue resolution at scale.

2 investors

Luminal provides AI model compilation and inference optimization software that compiles models into optimized native code for GPUs and ASICs, delivering 2-3x faster inference performance compared to traditional runtime inference engines.

2 investors

Lyrebird develops AI models for audio and video generation, editing, and understanding, including speech regeneration and talking-head video synthesis. Its technology powers Descript's video editing workflows for content creators.

2 investors

Mach9 builds automated feature-extraction software for transportation, telecom, and construction industries, enabling rapid extraction and mapping of large-scale infrastructure projects. The company serves surveyors, transportation agencies, and engineering firms in North America.

2 investors

Machinations offers a platform for designing, simulating, and balancing game economies and mechanics, used by game designers and studios. It provides visual modeling tools to test game systems before development.

2 investors

Macrometa provides PhotonIQ, an AI-powered edge delivery network and developer platform that improves website and API speed, SEO, and Core Web Vitals without code changes. Its services—including prerendering, performance proxy, virtual waiting rooms, bot/fraud protection, and semantic search—target eCommerce and enterprise web operations to boost conversions and organic traffic.

2 investors

Maestro is a tool that analyzes AI-assisted coding sessions to distinguish well-scoped, verified engineering work from unchecked AI output, surfacing that assessment before a pull request is merged. It targets software engineering teams working with AI-generated code.

2 investors

Magic Patterns generates user interface designs that match existing product styling and enables rapid prototyping of new features. The platform serves product teams and designers who need to explore design ideas, test features with customers, and collaborate on prototypes.

2 investors

Major League Hacking (MLH) runs hackathons, remote fellowship programs, and the DEV (dev.to) online developer community, offering 12-week paid open-source internship alternatives and events for software creators. It serves developers and students learning and building software, with company sponsors such as Google, GitHub, and Snowflake.

2 investors

Makora builds a platform that automatically writes, optimizes, and deploys high-performance GPU code, using AI to handle GPU kernel generation, inference optimization, and real-time performance tuning across different hardware environments. It targets teams running AI infrastructure that want to reduce compute costs and improve performance.

2 investors

ManageXR is a deployment platform for VR and AR applications that helps organizations manage and control fleets of headsets. The company serves enterprises, schools, and healthcare institutions deploying immersive technology at scale.

2 investors

Replit is an AI-driven coding platform that enables developers to build, publish, and collaborate on applications with integrated AI assistants and automation tools. It serves developers of all levels seeking to accelerate application development from code to deployment across mobile and web platforms.

2 investors

Martini is an AI video creation platform designed for filmmakers, studios, and agencies that provides director-level control over shot composition, camera movement, and world building. The platform integrates image generation, video generation, and world models in a single workspace with collaborative features and export capabilities to professional editing software.

2 investors

Massdriver provides infrastructure automation and management for cloud-native organizations, enabling developers and operations teams to provision and manage infrastructure with ease while maintaining compliance and operational standards. The platform abstracts away complexity by offering standardized, consumable building blocks that handle Day Two operations including monitoring, scaling, and compliance out of the box.

2 investors

Mayhem is an application and API security testing platform that uses fuzzing and symbolic execution to find vulnerabilities in code, binaries, and APIs, providing proof-of-vulnerability exploits and CI/CD pipeline integration. It serves security and development teams with features including REST/gRPC API testing, binary analysis, dynamic SBOM generation, and enterprise deployment options across SaaS, private cloud, and closed networks.

2 investors

Maze is a security company, founded in 2024, that uses AI to help defenders identify and address vulnerabilities in code and cloud environments. It targets the cybersecurity market with a product- and engineering-focused approach.

2 investors

Medium Rare sells premium website templates for Webflow, Figma, and Framer, aimed at businesses and individuals building sites across industries such as SaaS, e-commerce, and consulting. The company has operated since 2014 and offers customizable templates with dedicated support.

2 investors

Mendix offers a low-code application platform for building, deploying, and governing enterprise applications and AI agents on top of existing systems like ERP, CRM, and OT. It targets large enterprises and regulated industries, providing capabilities for enterprise knowledge graphs, AI model development, agentic development, process orchestration, and AI governance.

2 investors

Mendral is an AI DevOps platform that automates manual DevOps work for engineering teams through three always-on agents for security, reliability, and performance, plus custom automations. It installs as a GitHub App and autonomously diagnoses and fixes CI/CD issues, dependency vulnerabilities, and performance bottlenecks.

2 investors

Mercoa provides B2B payment solutions, specifically AI-powered billing and invoicing tools, for SaaS platforms to embed into their product for their end customers. The platform offers both backend and frontend SDKs to help vertical SaaS companies launch branded payment experiences and unlock new revenue streams from payments monetization.

2 investors

Merge provides a unified API and integration infrastructure that lets software companies connect their products to hundreds of third-party systems (HRIS, accounting, ticketing, file storage, CRM) and deploy AI agents that take authenticated actions across enterprise tools. It also offers model routing to direct LLM requests to different providers, serving product and engineering teams building AI features and integrations.

2 investors

Merit Systems develops an agentic commerce developer tool designed to enable individual teams to operate independently. The platform focuses on modernizing how small teams approach commerce and business automation.

2 investors