Developer Tools Startups

Jet Admin is a low-code platform that generates working applications with AI, allowing users to describe their needs (CRM, dashboard, inventory tracker) and instantly create apps with connected data, logic, and UI. The platform serves businesses and developers building internal tools and business applications.

1 investor

JigsawStack builds specialized small AI models for high-maintenance backend tasks such as OCR, translation, and web scraping, combining traditional machine learning models with small language models and custom training data. It packages these into a developer-friendly AI SDK that developers can integrate into any backend.

1 investor

JigxFrontline is a native mobile app for Acumatica that enables field teams—including field services technicians, sales representatives, and project-based workers—to manage tasks, capture data via mobile forms, and access real-time information from job sites with offline functionality.

1 investor

Jitsu is an open-source event data collection platform that captures behavioral data from websites, apps, and other sources directly into data warehouses in real-time. It serves data teams and product analytics teams who want to build unified data pipelines without vendor lock-in.

1 investor

J Media Group builds WordPress-based websites, branding systems, and digital content for B2B companies, federal contractors, and growth-stage teams. The company has completed over 500 projects across various industries over 11 years.

1 investor

Joel on Software is a personal blog by Joel Spolsky featuring over 1,100 articles on software development, management, business, and the Internet. The site also discusses related projects including the Block Protocol and the HASH simulation platform.

1 investor

Joggr was a platform that initially provided developers with an AI-assisted documentation experience, later pivoting to context engineering for coding agents. The company has ceased operations.

1 investor

JourneyApps provides software development tools that enable organizations to build field workforce applications. The platform is designed for connecting field workers and managing mobile app development at scale.

1 investor

Judoscale provides autoscaling for web services and background job queues across any hosting platform, using queue latency and language-specific libraries for Ruby, Python, Node.js, and Java. It targets engineering teams looking to right-size their applications and reduce hosting costs.

1 investor

JuiceFS is a distributed POSIX-compatible file system that stores data in object storage and uses a database such as Redis for metadata, with support for mounting, Kubernetes CSI, Hadoop/Hive, and an S3 gateway. It targets developers and data teams needing scalable shared storage for datasets, cloud-native workloads, and big data applications.

1 investor

Personal portfolio site of a founder-engineer whose primary venture, Clusy, is an agent-native notebook for machine learning and data science where users describe an experiment and an agent locates data, writes and runs the code. The page also catalogs the individual's research, publications, and other AI/agent-based projects.

1 investor

JumpStart is a non-profit organization that provides programs, capital, and support services to tech startups and small businesses across Ohio, with offerings ranging from early-stage funding to accelerator programs and specialized business development services.

1 investor

Beep is a web-based annotation and feedback tool that enables users to add comments and suggestions directly on web pages without requiring video editing or screenshot skills. The platform serves UX/UI designers, digital agencies, and tech-focused teams seeking streamlined visual communication.

1 investor

Justinmind builds a prototyping and design tool used to design, validate, and test websites and product interfaces. It serves customers across 180+ countries with a distributed team in Europe and the Americas.

1 investor

JWay is a software development company that builds mobile apps and related digital products for businesses. Its site focuses on custom app development and related consulting content.

1 investor

A web-based debugger for JSON Web Tokens (JWT) that lets developers decode, verify, and generate tokens following the RFC 7519 standard for securely representing claims between parties. It serves software developers working with authentication and token-based security.

1 investor

JXL is a spreadsheet-style work editor and organizer app for Atlassian Jira, offering inline bulk editing, Excel-like formulas, custom hierarchies, conditional formatting, and smart columns. It serves Jira teams across roles and industries, working with both Jira Cloud and Jira Data Center.

1 investor

Kable provides billing, invoicing, analytics, and authentication infrastructure for API businesses, enabling developers to integrate these capabilities with minimal setup. The platform helps API companies reduce engineering overhead and implement flexible billing models.

1 investor

Kaholo builds a DevOps automation platform that lets teams create and manage workflows without extensive scripting, aiming to reduce onboarding time and improve policy compliance. It serves DevOps and engineering teams in the software development tooling space.

1 investor

KAKUCHO brings emerging technologies like AI and AR into practical, field-ready implementations for real-world use. The company bridges the gap between technical innovation and on-the-ground adoption by refining concepts into deployable solutions.

1 investor

Kamu develops data infrastructure technology for cross-organizational data exchange, enabling efficient sharing and verification of data quality across business, government, and research sectors. The platform combines distributed systems, data versioning, and blockchain technologies to address barriers in the digital economy's data foundation.

1 investor

Personal website of Kanjun Qiu, whose main focus is Imbue, a company building AI agents that help people create and edit software by translating ideas into code. The page also describes her work as an early-stage startup investor at Outset Capital and past ventures.

1 investor

Kapso provides a platform for integrating WhatsApp messaging into applications and AI workflows. The service enables both developers and AI agents to send and receive messages, manage conversations, and build automated WhatsApp interactions with instant sandbox setup and multi-tenant customer connection options.

1 investor

Karambit.AI performs static analysis of software binaries (without source code) to detect malicious or unintended behaviors and verify integrity before deployment. It helps organizations secure their software supply chain and maintain compliance during product release and updates.

1 investor