Developer Tools Startups

Last9 is an observability platform that ingests metrics, logs, traces, and profiles and correlates them into unified dashboards, alerts, and AI agents for engineering teams. It supports high-cardinality telemetry data, OpenTelemetry-native integrations, and AI co-pilots (via Claude, Cursor, or Slack) to help teams triage and remediate issues while controlling costs.

2 investors

Latent Technology builds AI-driven generative physics for games, producing physical character rigs that react to their environment and drive their own muscle-based motion in real-time without keyframed animations. It targets game developers seeking dynamic, emergent character behavior and environment interactions.

2 investors

Latitude provides a Global Fiat Payouts API that sends funds from USD or stablecoins (USDC) to recipients worldwide, handling currency conversion, compliance, and last-mile delivery through local payment networks. It serves developers and businesses making cross-border payments across regions including Latin America, Europe, Asia Pacific, and North America.

2 investors

LaunchBrightly automates the capture and updating of product screenshots for help centers and documentation, refreshing them as engineering teams ship product changes. It targets support and documentation teams that need consistently branded, up-to-date screenshots in their help articles.

2 investors

LayerLens provides evaluation and benchmarking tools for AI models, offering verified performance data across public and private benchmarks. Its two products, Stratix and Stratix Premium, let users compare models on accuracy, latency, and behavior, upload custom benchmarks, evaluate private models, and define custom scorers and LLM judges with auditable results.

2 investors

Learnosity provides assessment APIs and SDKs that let development teams embed question authoring, test delivery, scoring, and reporting into their own software products. It also offers AI-based tools such as an agentic essay-grading engine and a math engine, serving companies building learning and assessment products.

2 investors

Legit Security provides an application security platform that helps organizations identify and manage software vulnerabilities and risks across their development environments. The platform serves enterprise security teams seeking to reduce alert fatigue and improve visibility into their application attack surface.

2 investors

Lemma provides production monitoring and observability for AI agents, surfacing failures, aggregating issues, and enabling quick resolution through integrated alerts and context-sharing tools.

2 investors

Lenses builds software that simplifies management and access to streaming data across hybrid infrastructure, enabling development teams to work independently without central bottlenecks. The platform unifies the developer experience across different streaming technologies like Apache Kafka, helping organizations build real-time services.

2 investors

Lifemote provides AI-based analytics for internet service providers to give visibility into in-home connectivity issues, aiming to reduce technical support calls and truck rolls while improving network reliability. Its platform helps ISPs improve customer satisfaction and identify upsell opportunities such as mesh networking.

2 investors

LightLink is an Ethereum Layer 2 blockchain that simplifies blockchain interactions for enterprises and developers. The platform provides account abstraction, chain abstraction, and personal AI agents to enable frictionless blockchain experiences.

2 investors

Lightly provides tools for AI teams to manage and curate training data more efficiently. The company focuses on data-centric approaches to improve machine learning model quality.

2 investors

Lightmatter is a product development firm that partners with companies to design and build digital products from concept through launch. It operates globally from its New York headquarters.

2 investors

LightOn provides a production retrieval-augmented generation (RAG) platform delivered through three API endpoints for document parsing/OCR, structured field extraction, and grounded hybrid search with citations. It targets developers and enterprises building AI agents and search applications, offering LLM-agnostic, MCP-native infrastructure with workspace and chunk-level access controls.

2 investors

Lightsprint is an AI-native platform where developers, product managers, and designers plan, build, and ship software together using parallel cloud agents. It works with existing codebases and integrates with GitHub, Linear, and Slack to streamline the full software development lifecycle from requirements to production.

2 investors

Lightyear, based in the United States, provides a platform for blockchain-based payments and currency exchange, with an emphasis on developing markets. It supports cross-currency and cross-asset transactions for its clients.

2 investors

Lingo.dev provides translation APIs that teams configure with custom glossaries, brand guidelines, language preferences, and quality metrics, retaining context across requests to handle localization at scale for companies like Mistral and Solana.

2 investors

Liquality builds decentralized tools and protocols, including a browser-extension crypto wallet that offers a multi-chain interface to Web3 with interoperability features. The project, incubated in Consensys, is transitioning toward a decentralized autonomous organization (DAO) for community governance.

2 investors

Liquibase provides a platform for governing and automating database change management across pipelines, platforms, and teams, integrating with tools like ServiceNow, GitHub, Harness, and Terraform. It supports over 65 databases and adds governance, security, policy checks, drift detection, and audit evidence for enterprise database delivery workflows.

2 investors

LiveKit is a developer platform for building, deploying, and monitoring voice, video, and physical AI agents using open source SDKs, with cloud infrastructure that handles runtime, routing, autoscaling, and realtime observability. It targets developers and enterprise teams building low-latency, real-time conversational agents.

2 investors

LLUMO builds AI optimization tools that provide recommendations and insights to help AI teams improve LLM performance and accuracy while reducing costs. It targets high-growth AI businesses looking to enhance their AI-driven customer experiences.

2 investors

Locus provides payment infrastructure and financial access controls for autonomous AI agents, enabling them to purchase API services, compute resources, and tools within programmable spending rules. The platform offers pay-per-use access to 44+ API providers (AI models, data services, search engines) along with agent-native deployment and checkout capabilities, serving AI developers and teams building autonomous systems.

2 investors

Personal website of Logan Kilpatrick, an angel investor and developer who works at Google DeepMind enabling developers to build with Gemini. He makes personal investments of $100k–$300k in developer tools and AI-enabled applications.

2 investors

Lokalise provides a localization platform that enables businesses to translate and adapt content for multiple markets and languages through automated workflows and integrations. The platform serves Fortune 500 companies and startups across web, mobile apps, games, and digital content.

2 investors