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 ## Documentation
 
+* [Platform Support](doc/platform-support.md)
 * [Building](doc/build.md)
 * [OpenCV Hardware Adapter Layer](doc/opencv.md)
 * [Overview of KleidiCV functionality](doc/functionality.md)
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+<!--
+SPDX-FileCopyrightText: 2023 - 2024 Arm Limited and/or its affiliates <open-source-office@arm.com>
+
+SPDX-License-Identifier: Apache-2.0
+-->
+
+# Platform Support
+
+Support for different platforms is organised in 3 tiers[^1].
+
+## Tier 1
+
+A released version of KleidiCV shall be tested for correctness and performance on a Tier 1 platform.
+
+At present the only Tier 1 platform is Android on Samsung Galaxy S22 or Google Pixel 8 with an up-to-date operating system.
+Applications must be built with Android NDK r26d or later.
+
+## Tier 2
+
+KleidiCV is tested for correctness on a Tier 2 platform, however performance is not checked.
+
+At present the only Tier 2 platform is AArch64 Ubuntu, as defined by `docker/Dockerfile` in the KleidiCV source tree.
+
+## Tier 3
+
+KleidiCV aims to support Tier 3 platforms but since no routine
+testing is done on these platforms it may or may not work in practise.
+
+At present the only Tier 3 platform is Mac computers with Apple silicon.
+
+
+[^1] Inspired by [Rust's platform support](https://doc.rust-lang.org/nightly/rustc/platform-support.html).