Developer Tools Startups

Brightlines provides online safety and digital protection services for high-profile individuals and organizations vulnerable to harassment, targeting, or threats. The company combines technology takedown tools and techniques to protect employees in civic, advocacy, media, research, and public service roles.

1 investor

Brilliant Chemistry is a software consultancy that guides businesses and startups through designing and building custom applications and system integrations. It has worked with clients on projects such as recruiting platforms, manufacturing ERP integrations, and information platforms for first responders.

1 investor

Brio builds neural world models and simulations from a robot's own sensor logs to train and evaluate robotic stacks, aiming to close the sim-to-real gap. It serves robotics teams, supporting perception sensors such as RGB, depth, lidar, and proprioception, and approaches like SLAM and VLAs.

1 investor

Transoft develops software for transportation engineering, traffic safety, and aviation planning sectors. The company serves engineering firms, government agencies, and airports globally with solutions for vehicle tracking, civil engineering, and airport operations.

1 investor

Brixies provides a library of 900+ free and premium layouts and components for the Bricks Builder page builder for WordPress, using a design-agnostic, BEM-based structure. It targets web designers and developers, offering a copy-paste system, a Figma file, and compatibility with ACSS, Core Framework, AT Framework, or native Bricks variables.

1 investor

Brizy is a no-code website and landing page builder offering a WordPress plugin and a cloud-hosted platform for creating responsive sites via a drag-and-drop editor. It targets agencies, freelancers, marketers, hosts/resellers, and SaaS providers with white-label branding, team collaboration, own-domain publishing, and reseller features.

1 investor

Broccoli AI provides AI agents that automate customer-facing and operational tasks for home service contractors like plumbing and HVAC companies, including phone answering, job scheduling, lead follow-up, and technician dispatch.

1 investor

BrontoSource enables teams to safely evolve and refactor large codebases using deterministic, traceable changes. The company combines language knowledge with compiler analysis to help organizations move AI systems from experimentation to production at scale.

1 investor

Browse AI provides prebuilt robots for automating web data extraction, including a tool to scrape customer reviews from AppSumo deal pages. The platform enables users to extract structured review data without coding.

1 investor

BrowserOS is an open-source browser with built-in AI agents that automate web tasks through natural language commands without coding. It prioritizes privacy and runs locally, supporting multiple AI providers and 40+ built-in integrations for task automation.

1 investor

BrowserStack provides a cloud-based software testing platform for scaling test automation across 3,500+ browser-device combinations on a real device cloud, aimed at development and QA teams. Its offerings cover cross-browser and browser automation testing, WCAG accessibility compliance testing, AI-driven test management, and visual testing, with integrations for major frameworks and CI/CD pipelines.

1 investor

A drawing application designed for iPad that allows users to create digital artwork.

1 investor

Reflag provides TypeScript feature flag management with local evaluation, letting developers grant early access, run betas, monitor feature exposure and adoption, and capture in-app feedback. It is a developer tool aimed at engineering and product teams building software features.

1 investor

Bugsee provides an SDK for Kotlin Multiplatform apps that captures crashes, errors, network activity, logs, and full session replay across iOS and Android. It is a mobile bug and crash reporting tool for app development, QA, and production teams, with integrations into tools like Jira, Slack, GitLab, and GitHub.

1 investor

BuildBear Labs provides testing and development tools for Web3 developers to build and verify decentralized applications (dApps) in realistic environments. The platform offers a simulator for EVM-based protocols and a plugin ecosystem that integrates off-chain services, supporting both Foundry and Hardhat frameworks.

1 investor

Buildbox is a platform that detects failed user journeys in AI agents that pass their evals but still fail to help users complete tasks, ranking these failures by business impact. It ties agent failures to outcomes and tests alternative agent behaviors against the same customer task before release.

1 investor

Builder Blueprints provides curated policy and legal document templates for early-stage startups to implement privacy-protective, user-centric policies from day one. The templates are designed to help founders adopt high-integrity practices around user data, privacy, and autonomy without requiring extensive legal resources.

1 investor

BuilderBase operates a platform for organizing and managing builder events including hackathons, accelerators, and innovation sprints for companies, communities, and investors. The platform provides end-to-end event management tools including registration, team formation, judging, and analytics.

1 investor

BuilderBase is a platform for running hackathons, accelerators, sprints, and other builder events end to end, covering registration, applications, team formation, judging, sponsors, and ROI reporting. It serves companies, VCs, accelerators, universities, nonprofits, and enterprises seeking to build technical communities, source founders/talent, or run internal innovation sprints, and includes a marketplace connecting event organizers with sponsors.

1 investor

BuildFire is a no-code app builder platform that enables sports teams, clubs, and youth organizations to create custom mobile applications without coding expertise. The platform provides pre-built features including event scheduling, push notifications, roster management, and community engagement tools tailored for sports communities.

1 investor

BuildJet provides faster and secure runner infrastructure for GitHub Actions, allowing developers to speed up CI/CD pipelines by replacing default runners with optimized alternatives.

1 investor

BuildShip is an AI-powered, low-code visual builder for creating backend APIs, workflows, and automations, letting users turn natural-language prompts into functioning flows with full code access, cloud hosting, or self-hosting. It targets developers, no-code builders, and enterprise teams across sensitive domains like healthcare, finance, and internal operations.

1 investor

Buildstash provides build artifact management and release workflow tools for software teams developing applications, games, and embedded systems. The platform integrates with CI/CD and collaboration tools to organize, share, and distribute builds across teams.

1 investor

Cosine builds Lumen, a system of AI coding models trained on production code to generate maintainable software, including support for enterprise and niche languages such as COBOL, Fortran, Verilog, Rust, and SQL. It offers terminal-native and cloud collaboration tools for engineering teams, with deployment options ranging from public cloud to single-tenant and fully air-gapped environments.

1 investor