diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6c80696..620c672 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 # Changelog
 
 ## [Unreleased]
+- Store GitHub data compressed at rest, reducing space usage by 6–8× (#750)
 - Improve weight sliders display (#736)
 - Separate bots from users in the UI (#720)
 - Add a feedback link to the prototype (#715)
diff --git a/package.json b/package.json
index e6763d6..e8ca6bb 100644
--- a/package.json
+++ b/package.json
@@ -19,6 +19,7 @@
     "lodash.sortby": "^4.7.0",
     "mkdirp": "^0.5.1",
     "object-assign": "4.1.1",
+    "pako": "^1.0.6",
     "promise": "8.0.1",
     "react": "^16.4.1",
     "react-dom": "^16.4.1",
diff --git a/sharness/test_build_static_site.t b/sharness/test_build_static_site.t
index c54c90e..1c5c19a 100755
--- a/sharness/test_build_static_site.t
+++ b/sharness/test_build_static_site.t
@@ -219,7 +219,7 @@ test_expect_success TWO_REPOS \
 test_expect_success TWO_REPOS \
     "TWO_REPOS: should have data for the two repositories" '
     for repo in sourcecred/example-git sourcecred/example-github; do
-        for file in github/view.json; do
+        for file in github/view.json.gz; do
             test -s "${data_dir}/${repo}/${file}" || return
         done
     done
@@ -253,7 +253,7 @@ test_expect_success NO_REPOS \
 test_expect_success NO_REPOS \
     "NO_REPOS: should not have repository data" '
     for repo in sourcecred/example-git sourcecred/example-github; do
-        for file in git/graph.json github/view.json; do
+        for file in git/graph.json github/view.json.gz; do
             test_must_fail test -f "${data_dir}/${repo}/${file}" || return
         done
     done
diff --git a/src/plugins/github/loadGithubData.js b/src/plugins/github/loadGithubData.js
index 752d35e..f9626a5 100644
--- a/src/plugins/github/loadGithubData.js
+++ b/src/plugins/github/loadGithubData.js
@@ -2,6 +2,7 @@
 
 import fs from "fs-extra";
 import path from "path";
+import pako from "pako";
 
 import fetchGithubRepo from "./fetchGithubRepo";
 import {RelationalView} from "./relationalView";
@@ -29,7 +30,7 @@ export async function loadGithubData(options: Options): Promise<void> {
   for (const response of responses) {
     view.addData(response);
   }
-  const blob = JSON.stringify(view);
-  const outputFilename = path.join(options.outputDirectory, "view.json");
+  const blob: Uint8Array = pako.gzip(JSON.stringify(view));
+  const outputFilename = path.join(options.outputDirectory, "view.json.gz");
   return fs.writeFile(outputFilename, blob);
 }
diff --git a/src/plugins/github/pluginAdapter.js b/src/plugins/github/pluginAdapter.js
index 1a4bd08..db05beb 100644
--- a/src/plugins/github/pluginAdapter.js
+++ b/src/plugins/github/pluginAdapter.js
@@ -1,4 +1,6 @@
 // @flow
+import pako from "pako";
+
 import type {
   StaticPluginAdapter as IStaticPluginAdapter,
   DynamicPluginAdapter as IDynamicPluginAdapater,
@@ -94,13 +96,15 @@ export class StaticPluginAdapter implements IStaticPluginAdapter {
   }
   async load(assets: Assets, repo: Repo): Promise<IDynamicPluginAdapater> {
     const url = assets.resolve(
-      `/api/v1/data/data/${repo.owner}/${repo.name}/github/view.json`
+      `/api/v1/data/data/${repo.owner}/${repo.name}/github/view.json.gz`
     );
     const response = await fetch(url);
     if (!response.ok) {
       return Promise.reject(response);
     }
-    const json = await response.json();
+    const arrayBuffer = await response.arrayBuffer();
+    const blob = new Uint8Array(arrayBuffer);
+    const json = JSON.parse(pako.ungzip(blob, {to: "string"}));
     const view = RelationalView.fromJSON(json);
     const graph = createGraph(view);
     return new DynamicPluginAdapter(view, graph);
diff --git a/yarn.lock b/yarn.lock
index 36bc56a..18868fc 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5658,7 +5658,7 @@ p-try@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/p-try/-/p-try-1.0.0.tgz#cbc79cdbaf8fd4228e13f621f2b1a237c1b207b3"
 
-pako@~1.0.5:
+pako@^1.0.6, pako@~1.0.5:
   version "1.0.6"
   resolved "https://registry.yarnpkg.com/pako/-/pako-1.0.6.tgz#0101211baa70c4bca4a0f63f2206e97b7dfaf258"