API Startups

Kable provides billing, invoicing, analytics, and authentication infrastructure for API businesses, enabling developers to integrate these capabilities with minimal setup. The platform helps API companies reduce engineering overhead and implement flexible billing models.

1 investor

LogisticsOS provides route optimization and planning APIs for delivery providers, e-commerce businesses, and transportation management systems. The platform uses algorithms to optimize thousands of orders in seconds, reducing delivery costs and improving operational efficiency.

1 investor

Mipos.dev offers an API for connecting restaurant technology services across Latin America. It serves restaurant tech providers and businesses in the Latin American market.

1 investor

MovingLake provides real-time API integrations that sync data between enterprise systems like ERPs, CRMs, and data warehouses, with support for event-driven architectures and minimal data drift.

1 investor

Nyckel provides a hosted machine learning platform that lets users train custom classification and recognition models on their own data — including image, text, and other data types — for tasks requiring consistent, high-volume predictions. It automatically tests many ML models against a customer's data, uses active learning to improve accuracy, and hosts the resulting models for inference.

1 investor

OpenSteer builds specialized AI agents that perform autonomous work by browsing the web, integrating with user tools, and executing on schedules either in the cloud or on-premises. The platform serves developers and enterprises looking to automate business processes and workflows.

1 investor

Pelm provides an API that enables businesses to retrieve household energy consumption data and account transfer information from U.S. utilities through a single integration point, rather than building connections to hundreds of individual utility providers.

1 investor

Ploid provides people data infrastructure, offering an index of over 2 billion people from professional and social sources that developers can search, enrich, and resolve through an API, CLI, and MCP to find contact details and identity information. It serves companies building sales, recruiting, customer intelligence, identity resolution, trust and safety tools, and AI agents that need up-to-date information about individuals.

1 investor

Pomerado is a developer tool that converts websites, legacy portals, and internal tools into APIs or MCP integrations that AI agents can use, handling hosting, permissioning, testing, and maintenance. It serves developers and teams building agentic workflows that need to connect agents to otherwise inaccessible systems.

1 investor

RecipeUI is an open source tool for testing and debugging APIs that lets non-backend engineers diagnose API failures independently.

1 investor

ReJot is an open-source software development platform or toolkit. The page provides limited concrete details about its specific offerings or target customers.

1 investor

Salus is a policy-aware proxy that intercepts and manages AI agent actions, allowing, clarifying, repairing, or escalating tool calls without requiring changes to the underlying agent or stack. It serves developers and teams building AI agents across LLMs and agentic frameworks.

1 investor

Sendo provides an SMS and RCS API for startups, offering lower pricing than competitors and faster deployment for text messaging features. The platform includes developer documentation, monitoring tools, and simplified 10DLC regulatory compliance.

1 investor

Skyvern automates browser-based workflows using AI and computer vision, handling tasks like logging into portals, filling forms, and extracting data without APIs or custom scripts. It serves enterprise teams and developers automating repetitive portal interactions, data extraction, and compliance processes across industries.

1 investor

Smobi is an AI-powered messaging platform that enables brands to send interactive RCS (Rich Communication Services) and SMS campaigns directly to customers' phones. The platform offers drag-and-drop campaign builders, AI-powered customer service agents, product card carousels, and event booking capabilities, designed for ecommerce, customer engagement, and customer support use cases.

1 investor

An API gateway that enables caching for existing fetch-based APIs without requiring code rewrites, reducing latency for development teams.

1 investor

Surge provides an SMS API for developers to add text messaging to applications. The platform emphasizes ease of use with intuitive APIs, clear documentation, and simplified carrier registration processes.

1 investor

Terse builds Durable Actors, an open source alternative to Cloudflare Durable Objects with higher memory limits, direct SQLite storage access, and default concurrency safety. It targets developers building background-agent and multiplayer infrastructure.

1 investor

Tesora provides AI agents that assist actuaries at property and casualty insurers, reinsurers, and managing general agents by automating data assembly, method execution, and rating deployment while keeping actuarial decision-making under human control, with deployment on the client's infrastructure and full data privacy protections.

1 investor

Ultralight is a GPU-accelerated HTML rendering toolkit for embedding modern HTML into games and native applications, available for C and C++ across platforms including Windows, macOS, Linux, Xbox, and PlayStation. It is built on a lightweight fork of WebKit and developed in collaboration with game studios.

1 investor

Valari provides APIs that allow technology companies in Latin America to integrate financial products into their platforms. The platform enables businesses to offer fintech services to their users without building financial infrastructure from scratch.

1 investor

Vespper builds a document infrastructure platform for regulated industries, with initial focus on pharmaceutical and clinical workflows. The platform serves regulated organizations handling sensitive documents in highly compliance-driven environments.

1 investor

Vessel is a developer-first platform that enables companies to integrate with customer-facing applications through a unified API, webhooks, and managed data pipelines. It handles authentication, permission management, rate limiting, and data synchronization across multiple third-party apps.

1 investor

Vizzly supplies analytics features that SaaS companies can embed for their own users, with the flexibility of custom development but without the associated engineering burden.

1 investor