Developer Tools Startups

21st.dev provides a library of thousands of components and templates from the community for developers to use in building applications.

6 investors

8base is a backend-as-a-service platform that turns text prompts into application blueprints, generating a data model, test data, custom backend functions, and a GraphQL API for software developers. It offers a fully-managed cloud service with shared, dedicated, and self-host options and SOC 2 and HIPAA compliance for running applications.

6 investors

Agency Tool Company builds infrastructure for robotics teams to build, deploy, and manage fielded robots, including ATC Deploy (over-the-air software updates and fleet management for robot fleets) and ATC Build (a CI runner backed by hosted NVIDIA Jetson embedded compute). Its tools target robotics companies operating real-world robots and integrate with CI systems like GitHub Actions and GitLab CI.

6 investors

Agentic Labs provides a context engine and code knowledge base platform for AI teams to manage code, organize data, optimize prompts, and improve model performance through evaluation and reinforcement learning.

6 investors

Agnost AI provides observability and failure detection for AI agents in production environments. The platform analyzes real production conversations from any LLM or framework to identify failures, extract patterns, and generate fixes that teams can implement, with support for intent detection, sentiment analysis, and automatic improvements.

6 investors

Alpic operates an AI infrastructure platform that lets B2B and DTC companies build AI-native interfaces such as MCP servers and ChatGPT integrations, with built-in security, observability, and distribution, alongside open-source frameworks and developer tools. The company was founded in July 2025 and is based in Paris and New York.

6 investors

Anam builds real-time interactive AI avatars that replicate human appearance and behavior for use in employee and customer-facing applications. The company combines research in photorealistic video generation with full-stack engineering to deliver avatars with sub-second latency and lip-sync synchronization.

6 investors

Andon Labs develops safety systems and protocols for autonomous AI-driven organizations, focusing on AI alignment and control mechanisms for agents that operate without human oversight.

6 investors

Anon builds agentic AI solutions that deploy AI agents from prototypes to production systems for SMBs and Fortune 500 companies. The company serves clients across financial services, healthcare, insurance, enterprise software, and developer tooling.

6 investors

Appdome provides a no-code platform for developers and DevSecOps teams to build secure Android and iOS applications. The platform automates mobile app security and development, enabling rapid secure app deployment.

6 investors

Applause is a crowdtesting company that connects enterprises with a global community of over 1.5 million independent testers and end users to perform QA across apps, websites, and digital experiences. It offers AI-enabled, fully managed testing services spanning manual testing, automation, usability, and customer experience for brands across industries.

6 investors

Apptimize offers a platform for mobile product teams to run A/B tests, push instant updates, and personalize user experiences through staged and segmented rollouts on native iOS and Android apps. It serves organizations aiming to improve app acquisition, engagement, and retention.

6 investors

Aptible offers a Platform as a Service that lets development teams deploy and run applications without managing their own infrastructure on AWS, GCP, or Azure. Its secure, compliant, and scalable platform targets developers at companies of all stages, from startups to publicly traded and unicorn companies.

6 investors

Aranya designs, deploys, and operates production AI infrastructure using clusterdOS, a self-healing distributed operating system that extends Kubernetes across the full stack to simplify infrastructure management for AI workloads.

6 investors

Archway is a blockchain protocol that rewards developers who build decentralized applications by giving them a share of gas fees, network inflation rewards, and the ability to charge usage premiums on their smart contracts. It targets Web3 developers building dapps on its network.

6 investors

Asimov develops a computer-aided design platform for genetic engineering, enabling designers to program living cells by applying abstraction, standardization, and modeling to biology. The company serves genetic engineers and biotechnology researchers building engineered biological systems.

6 investors

Auterion develops products and services around open standards for autonomous systems technology, contributing to open source projects and supporting academic institutions.

6 investors

Automata builds a hardware-anchored verification layer for autonomous agents, using trusted execution environments (Intel SGX/TDX, AMD SEV-SNP, AWS Nitro) to enable onchain attestation of machine identity, state, and execution. It provides Rust and Solidity SDKs, a DCAP attestation dashboard, and TEE engineering for blockchain and AI workloads, serving developers and infrastructure teams such as rollups and decentralized exchanges.

6 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.

6 investors

Bitpart builds an AI engine and SDK for creating interactive game worlds, letting designers, writers, and animators author characters that converse and interact via its Coppola authoring tool and AI Director without needing programmers. It integrates with Unreal Engine (including MetaHumans, Navmesh, and Behavior Trees) and offers a library of ready-to-use character Archetypes for game developers.

6 investors

Blaxel provides cloud infrastructure for autonomous agents, offering persistent sandboxes that boot in milliseconds and can stay idle indefinitely without cold-start penalties. The platform combines compute, storage, and networking primitives designed for AI agents to run, scale, and operate reliably with stateful execution and multi-agent collaboration.

6 investors

Boba Network is a hybrid blockchain and Layer 2 scaling solution built on Ethereum that provides off-chain data and compute, letting developers build dApps that connect to off-chain APIs at lower transaction costs. It targets blockchain developers building scalable, hybrid decentralized applications.

6 investors

Braintrust provides AI observability and evaluation platform that monitors production AI systems to surface patterns, define quality standards, and automate improvements. The platform serves AI teams across engineering and product organizations.

6 investors

Bright Security develops an AI-powered application security platform that automates detection, remediation, and validation of security vulnerabilities integrated into the software development lifecycle. The platform targets development and AppSec teams seeking to accelerate secure software delivery.

6 investors