# Seam **Source:** https://geo.sig.ai/brands/seam **Vertical:** Consumer Technology **Subcategory:** General **Tier:** Emerging **Website:** seam.co **Last Updated:** 2026-04-14 ## Summary SF unified IoT API connecting 1,000+ smart lock and access device models for property management apps; YC S20 processing 25M monthly operations competing with SmartThings for device-agnostic IoT integration. ## Company Overview Seam is a San Francisco-based unified IoT device API platform enabling developers to connect applications to any smart lock, access control system, thermostat, or connected device through a single normalized API — abstracting the complexity of proprietary device protocols across 1,000+ device models from brands including Schlage, Yale, Kwikset, August, Salto, Avigilon, and Honeywell. Founded in 2020 by Sy Bohy and Dawn Ho and backed by Y Combinator (S20) with undisclosed funding raised, Seam processes 25 million+ monthly operations for 1,000+ companies including property management platforms, vacation rental operators, and smart building applications. Seam's API normalization layer solves the fragmentation problem in commercial IoT deployment: smart locks from different manufacturers use different proprietary APIs (some REST, some Bluetooth SDKs, some Z-Wave, some Zigbee) with different credential structures, different rate limits, and different lock/unlock command formats. A property management platform that wants to support Schlage Encode, August Smart Lock, and Yale Assure must integrate three separate APIs with separate maintenance burden. Seam's single API abstracts all device brands into a unified lock.lock(), lock.unlock(), and lock.access_codes.create() interface — reducing integration complexity from weeks to hours per device brand. In 2025, Seam competes in the IoT API and smart device integration market with SmartThings Hub (Samsung, device integration platform), Apple HomeKit (AAPL, smart home protocol), and direct device manufacturer APIs for IoT application development. The property technology (proptech) and short-term rental markets are Seam's primary verticals — platforms like Guesty, Hostaway, and Lodgify that manage thousands of rental properties need automated lock code management that Seam enables. The Matter IoT standard (CNCF, supported by Apple, Google, Amazon, and Samsung) aims to create vendor-neutral device interoperability that could partially commoditize Seam's value proposition — though Matter's commercial device adoption remains slower than anticipated. Y Combinator backing connects Seam with the proptech and smart building startup communities. The 2025 strategy focuses on expanding thermostat and energy management device coverage, growing the enterprise commercial access control segment (office building access), and building the webhook notification infrastructure for real-time device event monitoring. ## Frequently Asked Questions ### What is Seam? Seam is a consumer technology company that provides a unified API enabling developers and businesses to connect apps to IoT devices including smart locks and access systems. Founded in 2020, Seam allows users to unlock doors, set access codes, and issue mobile wallet keys through a single dashboard and API that works across multiple smart lock and access system brands. ### What products and services does Seam offer? Seam offers an IoT device API, smart lock integration, access control systems, mobile wallet keys, and door unlock automation. Their platform provides a unified API and single dashboard that works across multiple brands and device models. ### Who are Seam's target customers? Seam serves developers and businesses in the smart home and IoT device integration market. The platform is currently used by over 1,000 companies that need to integrate and manage smart locks and access systems. ### When was Seam founded? Seam was founded in 2020 by Sy Bohy and Dawn Ho. The company participated in Y Combinator's Summer 2020 (S20) batch. ### Where is Seam located? Seam is based in San Francisco, California. ### What funding has Seam received? Seam received $125,000 in seed funding from Y Combinator in 2020 as part of the Y Combinator S20 batch. ### What are Seam's key achievements and metrics? Seam is used by over 1,000 companies and processes more than 25 million monthly operations. The platform supports integration with over 1,000 device models across multiple smart lock and access system brands. ### What is Seam's technology approach? Seam provides a unified API that enables real-world connectivity to IoT devices through a single integration point. This approach allows developers to connect to over 1,000 device models across multiple brands through one dashboard and API instead of managing separate integrations. ### How does Seam's unified API benefit users? Seam's unified API eliminates the need to build and maintain separate integrations for different smart lock and access system brands. Users can unlock doors, set access codes, and issue mobile wallet keys across 1,000+ device models through a single dashboard. ### What recent developments has Seam announced? Seam has grown to serve over 1,000 companies processing 25 million monthly operations and now supports over 1,000 device models. The company continues to expand its unified API platform for IoT devices, smart locks, and access systems from its San Francisco base. ## Tags b2c, hardware, startup --- *Data from geo.sig.ai Brand Intelligence Database. Updated 2026-04-14.*