diff --git a/.github/workflows/ask_sponsor.yaml b/.github/workflows/ask_sponsor.yaml
new file mode 100644
index 00000000..221357c2
--- /dev/null
+++ b/.github/workflows/ask_sponsor.yaml
@@ -0,0 +1,18 @@
+---
+name: Ask Sponsor
+on:
+  pull_request_target:
+    types:
+      - opened
+jobs:
+  ask_sponsor:
+    uses: ./.github/workflows/wc_ask_sponsor.yaml
+    permissions: {}
+    with:
+      author: ${{github.event.pull_request.user.login}}
+      pr_number: ${{github.event.pull_request.number}}
+    if: |
+      github.event.pull_request.user.type == 'User'
+    # if: |
+    #   github.event.pull_request.user.type == 'User' &&
+    #   github.event.pull_request.user.login != 'suzuki-shunsuke'
diff --git a/.github/workflows/wc_ask_sponsor.yaml b/.github/workflows/wc_ask_sponsor.yaml
new file mode 100644
index 00000000..10ca1714
--- /dev/null
+++ b/.github/workflows/wc_ask_sponsor.yaml
@@ -0,0 +1,69 @@
+---
+on:
+  workflow_dispatch:
+    inputs:
+      author:
+        required: true
+      pr_number:
+        required: true
+  workflow_call:
+    inputs:
+      author:
+        type: string
+        required: true
+      pr_number:
+        type: string
+        required: true
+jobs:
+  ask_sponsor:
+    runs-on: ubuntu-24.04
+    timeout-minutes: 10
+    permissions: {}
+    steps:
+      - env:
+          GH_TOKEN: ${{github.token}}
+          AUTHOR: ${{inputs.author}}
+          PR_NUMBER: ${{inputs.pr_number}}
+          BODY: |
+            We spend a lot of time maintaining aqua and aqua-registry every day.
+            Today, aqua-registry is used not only by aqua, but also by tools like mise and docker agent.
+            If these projects help you, please consider supporting us via GitHub Sponsors.
+            https://github.com/sponsors/aquaproj
+        run: |
+          set -eu
+
+          is_sponsor=$(gh api graphql \
+            -F "sponsorable=aquaproj" \
+            -F "author=$AUTHOR" \
+            -q '.data.user.isSponsoredBy' \
+            -f query='
+              query($sponsorable: String!, $author: String!) {
+                user(login: $sponsorable) {
+                  isSponsoredBy(accountLogin: $author)
+                }
+              }')
+          if [ "$is_sponsor" = "true" ]; then
+            echo "::notice:: @$AUTHOR is a sponsor of aquaproj"
+            exit 0
+          fi
+
+          is_sponsor=$(gh api graphql \
+            -F "sponsorable=suzuki-shunsuke" \
+            -F "author=$AUTHOR" \
+            -q '.data.user.isSponsoredBy' \
+            -f query='
+              query($sponsorable: String!, $author: String!) {
+                user(login: $sponsorable) {
+                  isSponsoredBy(accountLogin: $author)
+                }
+              }')
+          if [ "$is_sponsor" = "true" ]; then
+            echo "::notice:: @$AUTHOR is a sponsor of suzuki-shunsuke"
+            exit 0
+          fi
+
+          echo "::notice:: @$AUTHOR is NOT a (public) sponsor of aquaproj or suzuki-shunsuke"
+          gh pr comment \
+            -R "$GITHUB_REPOSITORY" \
+            --body "$BODY" \
+            "$PR_NUMBER"