Developer Tools Startups

Aside is an AI-powered browser that enables autonomous agents to complete web-based tasks across logged-in websites without integrations, including payments, messaging, and internal tools. It provides memory of browsing context, secure credential management for agents, and runs locally with hardware-backed encryption.

4 investors

AskUI provides a computer-use agent that operates software the way a human tester would—taking screenshots, interpreting steps in plain language, and clicking, typing, and scrolling—so tests survive UI changes without selectors, recordings, or object maps. It works across Windows, macOS, Linux, mobile devices, browsers, embedded and industrial systems, with authoring, CI/CLI execution, and reporting for software test automation teams.

4 investors

Assistant-ui is an open-source React library that provides pre-built components and state management for building AI chat interfaces. It enables developers to integrate ChatGPT-style conversational UIs into applications with support for streaming, multi-turn conversations, and integration with LLM providers like LangChain and Vercel AI SDK.

4 investors

Integration testing made easier for developers; acquired by Docker

4 investors

Automorphic develops machine learning infrastructure where deployed models continuously improve themselves using generated data as training material.

4 investors

Avatao provided hands-on, real-world secure coding training integrated into development workflows to help developers write more secure software. The company operated as a security training platform for development teams from 2014 to 2026.

4 investors

AVES Reality converts real-world geographic data into simulation-ready 3D digital environments and HD maps for industrial applications. The company provides infrastructure for physical AI systems, enabling faster and more accurate 3D world reconstruction for autonomous systems training and testing.

4 investors

Axiom develops OpenVM, a zero-knowledge virtual machine that enables cryptographic verification of software program execution. The technology is designed for production use in high-assurance applications including derivatives exchanges, blockchains, and layer-1 scaling solutions.

4 investors

Axiom is a fully managed, petabyte-scale event store and observability platform that ingests schema-less, high-cardinality event data and lets teams query it using its piped query language (APL). It targets engineering teams handling large log and telemetry volumes, positioned as an alternative to Splunk and Datadog, with native support for AI-agent querying.

4 investors

Axiomatic AI makes Lemma, an AI co-explorer for scientific and engineering work that helps users validate, derive, and analyze equations and reasoning across mathematics, physics, and engineering with reproducible Python-based modeling. It serves researchers and engineers, producing workspace artifacts such as Markdown notes, Python scripts, and Marimo notebooks.

4 investors

Balsa is a document and project tool for making software, combining spec writing, planning, and execution in one place with modules like milestones, tasks, and timeline views. It targets product managers, engineers, designers, and executives who need to write specs, track projects, and collaborate.

4 investors

BinPress is a learning hub based in New York that provides educational content and resources for entrepreneurs on topics including web hosting, website building, online marketing, and artificial intelligence.

4 investors

Bitte provides a no-code builder and developer tools for creating AI agents that generate and execute blockchain transactions (including EVM transactions), which can be embedded as a whitelabel chat widget. Each agent is exposed as an MCP server and comes with an analytics suite for tracking agent performance and user behavior.

4 investors

BizteX provides RPA (robotic process automation) and no-code data integration tools to eliminate manual administrative work and connect systems and SaaS platforms. The company serves organizations of any size looking to automate repetitive tasks and streamline workflows without requiring programming knowledge or costly system development.

4 investors

Black Duck provides an application security testing platform that unifies SAST, SCA, DAST, IAST, and AI-powered analysis to detect and remediate software vulnerabilities, license compliance risks, and code quality issues across the development lifecycle. It serves organizations building secure software, including those managing open source and AI-generated code and meeting regulations such as the EU Cyber Resilience Act.

4 investors

Blacksmith processes jobs and serves developers and organizations. The page does not clearly describe the core product or service offering.

4 investors

BMC Software provides automation, operations, and service management solutions for enterprises, serving the majority of Forbes Global 100 companies.

4 investors

BlinkOps builds a security automation platform aimed at security and IT operations teams. The company was founded in 2021 by security and IT operations experts.

4 investors

BlockCypher offers cloud-hosted infrastructure for blockchain development. Its services include multi-currency payment handling, data storage, and wallet infrastructure that runs across several data centers, so developers can build application-specific layers rather than operating their own blockchain nodes and back ends.

4 investors

Blocks provides a cloud cost management and financial operations tool focused on helping organizations control and optimize their AWS cloud spending. It is an official AWS partner with a Cloud Financial Operations competency.

4 investors

Seldon is a product development tool that uses synthetic personas modeled from real user behavior to surface bugs, friction, and design insights before product launch. It serves product teams in regulated industries like healthcare, finance, and education.

4 investors

Blue Matador is an automated monitoring and alerting tool that uses preconfigured models to detect anomalies and leading indicators of failure across system and custom metrics. It targets development-focused teams with limited dedicated operations staff.

4 investors

Bolt is an AI-powered platform for building web apps and websites by chatting with AI, handling coding, testing, and refactoring automatically. It includes Bolt Cloud, a backend infrastructure offering with hosting, databases, and integrations, aimed at developers, startups, marketers, and students.

4 investors

BoostSecurity offers an Application Security Posture Management (ASPM) platform that consolidates SAST, SCA, secrets, and IaC scanning into one engine, connecting at the source-code-management level (GitHub/GitLab) rather than the CI/CD pipeline. It uses AI-driven reachability analysis to prioritize vulnerabilities and automatically generates fixes pushed to pull requests, targeting enterprise security teams governing AI-assisted software development.

4 investors