Developer Tools Startups

B3 builds an operating system (B3OS) for creating onchain applications, smart contracts, and automations without code, alongside a labs division that incubates revenue-generating products and a holdings arm making strategic investments in complementary businesses. The company serves enterprise, builders, and crypto traders seeking to move operations onchain.

2 investors

Baaz is a software development company providing custom software and product engineering services for product and engineering teams worldwide, with delivery organized around measurable product outcomes. It has served clients across FinTech, retail, healthcare, and other industries in 26+ countries since 2018.

2 investors

Bacca is an autonomous AI engineer that monitors production software, triages and investigates issues, applies fixes within configurable guardrails, and escalates to humans only when needed. It targets software engineering teams to reduce on-call burden, offering cloud or on-premises deployment with dedicated per-customer instances.

2 investors

Backtrace provides error management and crash reporting software for development, support, and QA teams. The platform removes manual labor from error handling and helps engineers in gaming, mobile, and web application development observe and remediate production errors while improving test coverage.

2 investors

Banani is an AI UI design tool that turns text prompts, references, and PRDs into editable, multi-screen clickable UI prototypes, with export to Figma, HTML/CSS, or images. It targets product teams shipping UI quickly, including PMs, founders, engineers, non-designers, and designers seeking an AI copilot.

2 investors

Band VRF is a verifiable random function that generates provably random, cryptographically verifiable numbers for decentralized applications using threshold signatures and blockchain validation via BandChain. It serves dApp developers building use cases such as decentralized lotteries, NFT minting, gaming mechanics, and random selection in governance or airdrops.

2 investors

Barndoor provides a control plane for agentic AI that enables enterprises to manage how AI is used, shared, and scaled across their organization while maintaining security and governance.

2 investors

BaseKit provides website builder software that other companies offer to their own customers, including its Go Sitebuilder product. It operates as a white-label website building platform serving partner businesses and their end users.

2 investors

Baselime is an observability platform that uses logs, metrics, and distributed tracing to help developers detect, diagnose, and resolve issues before they impact users. It offers a ClickHouse-based query engine for fast queries on high-cardinality data, automatic real-time error tracking, and an AI copilot ("Tux") that surfaces insights and recommends code fixes.

2 investors

Baserow is an open-source low-code platform that allows users to build databases and applications without coding. It serves teams and organizations looking for self-hosted or cloud-based database solutions.

2 investors

Basic.tech develops a platform and suite of tools for building local-first software and AI applications, including an agentic interface (spaces.fun), personal cloud storage (basic.id), and a development platform for deploying local-first applications.

2 investors

Battlesnake is a competitive programming game where developers write code to control AI-powered snakes that compete against each other in automated leaderboards. Players deploy web servers running their own algorithms to find food, avoid obstacles, and eliminate opponents.

2 investors

Bench builds engineering software for hardware development in the AI era. The company is founded by a team of engineers focused on tools for hardware engineering.

2 investors

BenchFlow is a data lab that builds stateful environments — with services, files, tools, verifiers, traces, and replay — for training and evaluating AI agents on real computer workflows rather than static prompts. It ships SkillsBench for procedural skills, ClawsBench for simulated workplaces, and the BenchFlow runtime, working with frontier model labs and academic partners.

2 investors

Berget AI provides sovereign AI infrastructure hosted on Swedish data centers, offering serverless and dedicated inference for open large language models via an OpenAI-compatible API. It serves developer teams building and deploying AI applications, with a focus on the European market.

2 investors

Bespoke Labs develops AI research infrastructure and reinforcement learning environments for building reliable autonomous agents. The company works with frontier AI labs and enterprises to transition agents from proof-of-concept systems to production-ready coworkers.

2 investors

Bilanc provides analytics software for engineering teams, using AI to examine code and generate reports about developer experience and productivity metrics for team leadership.

2 investors

BitBar is a cloud-based testing platform that lets development and QA teams run manual and automated tests of web, native, and hybrid apps across real browsers and devices in parallel. It offers public cloud, private cloud, and dedicated device deployment options and integrates with existing testing frameworks and CI/CD pipelines.

2 investors

bitdrift provides real-time observability and data collection controls for distributed systems spanning mobile and server infrastructure. The platform targets engineers building internet infrastructure and aims to reduce wasteful data collection while improving debugging capabilities.

2 investors

bitHuman turns photos into real-time, lip-synced video avatars and AI characters with voice, running fully on-device across hardware from Raspberry Pi to iPhone to NVIDIA GPUs. It offers Python and Swift SDKs, a REST API, and a no-code dashboard for developers building talking avatars, illustrated multimedia books, and privacy-sensitive, self-hosted or air-gapped deployments.

2 investors

Bitloops is a locally-run CLI tool that builds a semantic model of a codebase and captures AI coding sessions, linking prompts, reasoning, and architectural decisions to Git commits. It provides structured context and enforceable engineering constraints to AI coding agents such as Claude Code, Cursor, Codex, and Gemini for software development teams.

2 investors

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

2 investors

Blast API's products are discontinued following Alchemy's acquisition of Bware Labs, with users directed to migrate to Alchemy. The page provides migration instructions and options for existing customers to convert remaining funds to Alchemy credits or request refunds.

2 investors

BlindPay provides a payment infrastructure platform that orchestrates stablecoins, local payment rails, virtual accounts, and compliance for global financial transactions. The company serves developers and companies building payment functionality, offering SDK-based fiat gateway integration with low fees and minimal on/off-ramp delays.

2 investors