diff --git a/README.md b/README.md
index a8226310f2..3b17fdbb22 100644
--- a/README.md
+++ b/README.md
@@ -66,6 +66,8 @@ We build the Microsoft build of Go toolset with the following OS/Arch combinatio
 | `windows` | ✓ | ✓ | |
 | `darwin` (macOS) | ✓ | ✓ | |
 
+For detailed platform support information across different Go versions, see [eng/doc/SupportedPlatforms.md](eng/doc/SupportedPlatforms.md).
+
 Visit the [Migration Guide](eng/doc/MigrationGuide.md) for guidance about how we recommend migrating existing Go projects to use the Microsoft build of Go.
 This guide also helps resolve commonly encountered issues.
 
diff --git a/eng/doc/SupportedPlatforms.md b/eng/doc/SupportedPlatforms.md
new file mode 100644
index 0000000000..95c9a4c389
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+++ b/eng/doc/SupportedPlatforms.md
@@ -0,0 +1,36 @@
+# Supported Platforms
+
+This document describes the platforms supported by the Microsoft build of Go.
+
+"Support" means that Microsoft will accept bug reports for these platforms and
+investigate issues. Platforms outside this scope are provided support on a
+best-effort basis with no guarantees.
+
+For information about which platforms have prebuilt toolset binaries available,
+see [Downloads.md](Downloads.md).
+
+## Platform Support Matrix
+
+| OS/Arch | Minimum Versions | Crypto Backend | Notes |
+|---------|-----------------|----------------|-------|
+| linux/amd64 | Azure Linux 3.0+, Ubuntu 22.04+ | OpenSSL | |
+| linux/arm64 | Azure Linux 3.0+, Ubuntu 22.04+ | OpenSSL | |
+| linux/arm32 | Ubuntu 22.04+ | OpenSSL | |
+| windows/amd64 | Windows 10+, Windows Server 2016+ | CNG | |
+| windows/arm64 | Windows 11+, Windows Server 2025+ | CNG | |
+| darwin/amd64 | macOS 13+ | CryptoKit/CommonCrypto | Added in Go 1.24 |
+| darwin/arm64 | macOS 13+ | CryptoKit/CommonCrypto | Added in Go 1.24 |
+
+## OpenSSL Versions
+
+The following OpenSSL versions are supported on Linux platforms:
+
+- OpenSSL 1.1.0 and 1.1.1
+- OpenSSL 3.x (built-in providers, or SymCrypt provider v1.6.1+)
+
+## Getting Help
+
+If you need support for an additional platform or encounter issues with a supported platform:
+
+1. Check existing issues with the [Area-Acquisition](https://github.com/microsoft/go/labels/Area-Acquisition) label
+1. [File a new issue](https://github.com/microsoft/go/issues/new/choose) if your platform or issue isn't already covered