diff --git a/docs/Project.toml b/docs/Project.toml
index cba08976..a97f0d6c 100644
--- a/docs/Project.toml
+++ b/docs/Project.toml
@@ -1,11 +1,13 @@
 [deps]
 Documenter = "e30172f5-a6a5-5a46-863b-614d45cd2de4"
+DocumenterMermaid = "a078cd44-4d9c-4618-b545-3ab9d77f9177"
 ITensorDocsNext = "701fd796-f527-45da-9a53-2681c1a90c45"
 Literate = "98b081ad-f1c9-55d3-8b20-4c87d4299306"
 MultiDocumenter = "87ed4bf0-c935-4a67-83c3-2a03bee4197c"
 
 [compat]
 Documenter = "1.9.0"
+DocumenterMermaid = "0.2.0"
 ITensorDocsNext = "0.1.0"
 Literate = "2.20.1"
 MultiDocumenter = "0.7.1"
diff --git a/docs/make.jl b/docs/make.jl
index a79af99a..638ca826 100644
--- a/docs/make.jl
+++ b/docs/make.jl
@@ -7,6 +7,7 @@
 # `--temp`, in which case the source repositories are cloned into a temporary
 # directory (as opposed to `docs/clones`).
 using Documenter: Documenter
+using DocumenterMermaid: DocumenterMermaid
 using ITensorDocsNext: ITensorDocsNext
 using MultiDocumenter: MultiDocumenter
 
@@ -23,7 +24,7 @@ Documenter.makedocs(;
   sitename="ITensor ecosystem docs",
   modules=[ITensorDocsNext],
   warnonly=true,
-  pages=["index.md"],
+  pages=["index.md", "ecosystem_overview.md"],
 )
 
 @info "Building aggregate ITensorDocsNext site"
diff --git a/docs/src/ecosystem_overview.md b/docs/src/ecosystem_overview.md
new file mode 100644
index 00000000..74142cf2
--- /dev/null
+++ b/docs/src/ecosystem_overview.md
@@ -0,0 +1,18 @@
+# ITensor ecosystem overview
+
+```mermaid
+graph TD
+    ITensors(ITensors.jl) --> ITensorBase(ITensorBase.jl)
+    ITensorBase --> NamedDimsArrays(NamedDimsArrays.jl)
+    NamedDimsArrays --> SparseArraysBase(SparseArraysBase.jl)
+    NamedDimsArrays --> DiagonalArrays(DiagonalArrays.jl)
+    NamedDimsArrays --> BlockSparseArrays(BlockSparseArrays.jl)
+    NamedDimsArrays --> FusionTensors(FusionTensors.jl)
+    BlockSparseArrays --> SparseArraysBase
+    BlockSparseArrays --> DiagonalArrays
+    BlockSparseArrays --> GradedUnitRanges(GradedUnitRanges.jl)
+    DiagonalArrays --> SparseArraysBase
+    FusionTensors --> BlockSparseArrays
+    FusionTensors --> GradedUnitRanges
+    GradedUnitRanges --> SymmetrySectors(SymmetrySectors.jl)
+```