diff --git a/splash/src/components/header.js b/splash/src/components/header.js
index e36ebc5c646787210ede59820f66af48f448303d..fd965caa76c3903af8050d08feac85007b24d53a 100644
--- a/splash/src/components/header.js
+++ b/splash/src/components/header.js
@@ -1,64 +1,29 @@
 import React from 'react'
 import PropTypes from 'prop-types'
-import { Link } from 'gatsby'
-import { slide as Menu } from 'react-burger-menu'
 import './header.css'
 
+/**
+ * NOTE: this version of the header corresponds to the version of the site showing
+ * only the shutdown notice posted on 2021-08-20. To see the earlier version of the nav
+ * that we used for actual content, see `components/headerLegacy.js`
+ **/
+
 class Header extends React.Component {
   constructor(props) {
     super(props)
-    this.state = {
-      menuOpen: true,
-    }
-  }
-
-  handleStateChange(state) {
-    this.setState({ menuOpen: state.isOpen })
   }
 
   render() {
     return (
       <header>
-        <nav className="nav">
-          <Link to="/">
-            <h1 className="title">{this.props.siteTitle}</h1>
-          </Link>
-          <div className="nav__desktop">
-            <NavItems />
-          </div>
-          <div className="nav__mobile">
-            <Menu
-              itemListElement="div"
-              pageWrapId={'container'}
-              isOpen={this.state.menuOpen}
-              onStateChange={state => this.handleStateChange(state)}
-            >
-              <NavItems />
-            </Menu>
-          </div>
+        <nav style={{ justifyContent: 'center' }} className="nav">
+          <h1 className="title">{this.props.siteTitle}</h1>
         </nav>
       </header>
     )
   }
 }
 
-const NavItems = () => (
-  <React.Fragment>
-    <Link to="/about" className="nav__link" activeClassName="active">
-      About
-    </Link>
-    <Link to="/how-to" className="nav__link" activeClassName="active">
-      How-to
-    </Link>
-    <Link to="/donate" className="nav__link" activeClassName="active">
-      Donate
-    </Link>
-    <Link to="/privacy" className="nav__link" activeClassName="active">
-      Privacy
-    </Link>
-  </React.Fragment>
-)
-
 Header.propTypes = {
   siteTitle: PropTypes.string,
 }
diff --git a/splash/src/components/headerLegacy.js b/splash/src/components/headerLegacy.js
new file mode 100644
index 0000000000000000000000000000000000000000..e36ebc5c646787210ede59820f66af48f448303d
--- /dev/null
+++ b/splash/src/components/headerLegacy.js
@@ -0,0 +1,70 @@
+import React from 'react'
+import PropTypes from 'prop-types'
+import { Link } from 'gatsby'
+import { slide as Menu } from 'react-burger-menu'
+import './header.css'
+
+class Header extends React.Component {
+  constructor(props) {
+    super(props)
+    this.state = {
+      menuOpen: true,
+    }
+  }
+
+  handleStateChange(state) {
+    this.setState({ menuOpen: state.isOpen })
+  }
+
+  render() {
+    return (
+      <header>
+        <nav className="nav">
+          <Link to="/">
+            <h1 className="title">{this.props.siteTitle}</h1>
+          </Link>
+          <div className="nav__desktop">
+            <NavItems />
+          </div>
+          <div className="nav__mobile">
+            <Menu
+              itemListElement="div"
+              pageWrapId={'container'}
+              isOpen={this.state.menuOpen}
+              onStateChange={state => this.handleStateChange(state)}
+            >
+              <NavItems />
+            </Menu>
+          </div>
+        </nav>
+      </header>
+    )
+  }
+}
+
+const NavItems = () => (
+  <React.Fragment>
+    <Link to="/about" className="nav__link" activeClassName="active">
+      About
+    </Link>
+    <Link to="/how-to" className="nav__link" activeClassName="active">
+      How-to
+    </Link>
+    <Link to="/donate" className="nav__link" activeClassName="active">
+      Donate
+    </Link>
+    <Link to="/privacy" className="nav__link" activeClassName="active">
+      Privacy
+    </Link>
+  </React.Fragment>
+)
+
+Header.propTypes = {
+  siteTitle: PropTypes.string,
+}
+
+Header.defaultProps = {
+  siteTitle: ``,
+}
+
+export default Header
diff --git a/splash/src/pages/index.js b/splash/src/pages/index.js
index 42ba808cae1fe6976268a883662452e7afb5bdc0..e1e0699f15a4f8a77ec839ac8bad338a581482ab 100644
--- a/splash/src/pages/index.js
+++ b/splash/src/pages/index.js
@@ -1,134 +1,53 @@
 import React from 'react'
 import Layout from '../components/layout'
 import SEO from '../components/seo'
-import { Link } from '@reach/router'
-import indexStyles from '../components/index.module.css'
-import {
-  spyIcon,
-  selfieIcon,
-  moneyIcon,
-  calyxLogo,
-  mozillaLogo,
-} from '../images/'
+
+/**
+ * NOTE: this version of the index page features the shutdown notice we published
+ * when shutting down the service on 2021-08-20. To view the index page as originally
+ * written, see `pages/indexLegacy.js`
+ **/
 
 const IndexPage = () => (
   <Layout>
     <SEO title="Signalboost: communicate with mass audiences securely and directly via message broadcasts and hotlines" />
-    {/*<p className={indexStyles.outageAlert}>*/}
-    {/*  ********************************************/}
-    {/*</p>*/}
-    {/*<h2 className={indexStyles.outageAlert}>OUTAGE ALERT</h2>*/}
-    {/*<p>*/}
-    {/*  (REASON FOR OUTAGE HERE)*/}
-    {/*</p>*/}
-    {/*<p className={indexStyles.outageAlert}>*/}
-    {/*  ********************************************/}
-    {/*</p>*/}
-
-    <div className={indexStyles.personas}>
-      <img
-        className={indexStyles.icon__left}
-        src={selfieIcon}
-        alt="Venmo QR code"
-        height="150"
-      />
-      <div className={indexStyles.text__right}>
-        <h3>Mass alerts for emergency rapid response</h3>
-        <p>
-          Our democracy is under attack. Mobilize thousands of people to protect
-          our civil rights by sending alerts directly to their phones.
-        </p>
-      </div>
-      <div className={indexStyles.text__left}>
-        <h3>
-          Anonymous<Link to="/privacy">*</Link> tiplines
-        </h3>
-        <p>
-          Empower journalists, legal observers, and human rights defenders with
-          a safe and lightweight way to receive sensitive tips and requests for
-          aid without exposing anyone's identity.
-        </p>
-      </div>
-      <img
-        className={indexStyles.icon__right}
-        src={spyIcon}
-        alt="Venmo QR code"
-        height="150"
-      />
-      <img
-        className={indexStyles.icon__left}
-        src={moneyIcon}
-        alt="Venmo QR code"
-        height="150"
-      />
-      <div className={indexStyles.text__right}>
-        <h3>Donation and resource coordination</h3>
-        <p>
-          In the time of Covid-19 and environmental disaster, give organizers on
-          the ground a tool to move resources quickly and safely.
-        </p>
-      </div>
-    </div>
+    <blockquote className="command blockquote-skinny">
+      <p>August 20, 2021</p>
+      <p>
+        We regret to inform you that Signalboost as it currently exists is
+        shutting down.
+      </p>
+      <p>
+        Since its inception, serving our users with integrity has been one of
+        Signalboost's most important core values. It's never been easy to be a
+        part of the rapidly changing ecosystem of encrypted messaging, in which
+        the craft of building software and stewarding sensitive data deserves to
+        be handled with resources and care. Despite our best efforts, we've been
+        unable to both sustain ourselves and get the technology to the level of
+        reliability and safety we believe our users deserve. Frankly, we're
+        burnt out!
+      </p>
+      <p>
+        As of today, the Signalboost service has been permanently shut down and,
+        in the interest of privacy, all user data has been permanently
+        destroyed. We remain deeply inspired by the many innovative ways that
+        thousands of dedicated activists have used this tool to push for a more
+        just world, and we apologize for having to bow out when there is so much
+        important work left to do. Toward that end, we are seeking out a
+        better-resourced, movement-aligned organization to adopt the project.
+        You can check for updates on the status of that effort on this page.
+      </p>
+      <p>Thank you so much for your support.</p>
+      <p>✨ 🖤 ✨</p>
+      <p>The Signalboost Team</p>
+    </blockquote>
 
-    <h2 className={indexStyles.why__signalboost}>Why use Signalboost?</h2>
-    <p>
-      Signalboost gives grassroots organizers the power to communicate with mass
-      audiences <span className="purple">securely</span> and{' '}
-      <span className="purple">directly</span> via message broadcasts and
-      hotlines.
+    <p style={{ textAlign: 'center' }}>
+      You can view an archived version of this site on the{' '}
+      <a href="https://web.archive.org/web/20210416110700/https://signalboost.info/">
+        Wayback Machine
+      </a>
     </p>
-    <h3>Reach thousands of people directly</h3>
-    <ul>
-      <li>
-        Organizers need quick and direct ways to disseminate information.
-        However, on social media platforms, important info is often obscured by
-        algorithms and other posts. Signalboost messages go directly to
-        subscribers' message inboxes.
-      </li>
-      <li>
-        Organizing in big group chats gets messy quickly and unnecessarily
-        exposes strangers' phone numbers to each other. Broadcasts offer a quick
-        way disseminate information directly to thousands of people.
-      </li>
-    </ul>
-    <h3>Respond to people individually and privately</h3>
-    <ul>
-      <li>
-        Subscribers to Signalboost channels can send in anonymous messages to
-        the hotline and admins can respond directly and privately to that
-        subscriber.
-      </li>
-      <li>
-        Subscribers do not see other subscribers' messages to the hotline. Only
-        admins can see them.
-      </li>
-    </ul>
-    <h3>Stay safe from surveillance</h3>
-    <ul>
-      <li>
-        Signalboost sends messages over <a href="https://signal.org">Signal</a>,
-        the most secure encrypted messaging service for phones.
-      </li>
-      <li>
-        By obscuring personal phone numbers, enforcing disappearing messages,
-        and controlling who is allowed to join their channel, Signalboost
-        empowers organizers to stay safe while speaking freely.
-      </li>
-    </ul>
-    <div className={indexStyles.getting__started}>
-      <Link className={indexStyles.getting__started__link} to="/how-to">
-        Try it out &rarr;
-      </Link>
-    </div>
-    <h3>Signalboost is supported by:</h3>
-    <div className={indexStyles.funders}>
-      <img
-        className={indexStyles.funder__logo_moz}
-        src={mozillaLogo}
-        alt="mozilla logo"
-      />
-      <img src={calyxLogo} height="130" alt="calyx logo" />
-    </div>
   </Layout>
 )
 
diff --git a/splash/src/pages/indexLegacy.js b/splash/src/pages/indexLegacy.js
new file mode 100644
index 0000000000000000000000000000000000000000..42ba808cae1fe6976268a883662452e7afb5bdc0
--- /dev/null
+++ b/splash/src/pages/indexLegacy.js
@@ -0,0 +1,135 @@
+import React from 'react'
+import Layout from '../components/layout'
+import SEO from '../components/seo'
+import { Link } from '@reach/router'
+import indexStyles from '../components/index.module.css'
+import {
+  spyIcon,
+  selfieIcon,
+  moneyIcon,
+  calyxLogo,
+  mozillaLogo,
+} from '../images/'
+
+const IndexPage = () => (
+  <Layout>
+    <SEO title="Signalboost: communicate with mass audiences securely and directly via message broadcasts and hotlines" />
+    {/*<p className={indexStyles.outageAlert}>*/}
+    {/*  ********************************************/}
+    {/*</p>*/}
+    {/*<h2 className={indexStyles.outageAlert}>OUTAGE ALERT</h2>*/}
+    {/*<p>*/}
+    {/*  (REASON FOR OUTAGE HERE)*/}
+    {/*</p>*/}
+    {/*<p className={indexStyles.outageAlert}>*/}
+    {/*  ********************************************/}
+    {/*</p>*/}
+
+    <div className={indexStyles.personas}>
+      <img
+        className={indexStyles.icon__left}
+        src={selfieIcon}
+        alt="Venmo QR code"
+        height="150"
+      />
+      <div className={indexStyles.text__right}>
+        <h3>Mass alerts for emergency rapid response</h3>
+        <p>
+          Our democracy is under attack. Mobilize thousands of people to protect
+          our civil rights by sending alerts directly to their phones.
+        </p>
+      </div>
+      <div className={indexStyles.text__left}>
+        <h3>
+          Anonymous<Link to="/privacy">*</Link> tiplines
+        </h3>
+        <p>
+          Empower journalists, legal observers, and human rights defenders with
+          a safe and lightweight way to receive sensitive tips and requests for
+          aid without exposing anyone's identity.
+        </p>
+      </div>
+      <img
+        className={indexStyles.icon__right}
+        src={spyIcon}
+        alt="Venmo QR code"
+        height="150"
+      />
+      <img
+        className={indexStyles.icon__left}
+        src={moneyIcon}
+        alt="Venmo QR code"
+        height="150"
+      />
+      <div className={indexStyles.text__right}>
+        <h3>Donation and resource coordination</h3>
+        <p>
+          In the time of Covid-19 and environmental disaster, give organizers on
+          the ground a tool to move resources quickly and safely.
+        </p>
+      </div>
+    </div>
+
+    <h2 className={indexStyles.why__signalboost}>Why use Signalboost?</h2>
+    <p>
+      Signalboost gives grassroots organizers the power to communicate with mass
+      audiences <span className="purple">securely</span> and{' '}
+      <span className="purple">directly</span> via message broadcasts and
+      hotlines.
+    </p>
+    <h3>Reach thousands of people directly</h3>
+    <ul>
+      <li>
+        Organizers need quick and direct ways to disseminate information.
+        However, on social media platforms, important info is often obscured by
+        algorithms and other posts. Signalboost messages go directly to
+        subscribers' message inboxes.
+      </li>
+      <li>
+        Organizing in big group chats gets messy quickly and unnecessarily
+        exposes strangers' phone numbers to each other. Broadcasts offer a quick
+        way disseminate information directly to thousands of people.
+      </li>
+    </ul>
+    <h3>Respond to people individually and privately</h3>
+    <ul>
+      <li>
+        Subscribers to Signalboost channels can send in anonymous messages to
+        the hotline and admins can respond directly and privately to that
+        subscriber.
+      </li>
+      <li>
+        Subscribers do not see other subscribers' messages to the hotline. Only
+        admins can see them.
+      </li>
+    </ul>
+    <h3>Stay safe from surveillance</h3>
+    <ul>
+      <li>
+        Signalboost sends messages over <a href="https://signal.org">Signal</a>,
+        the most secure encrypted messaging service for phones.
+      </li>
+      <li>
+        By obscuring personal phone numbers, enforcing disappearing messages,
+        and controlling who is allowed to join their channel, Signalboost
+        empowers organizers to stay safe while speaking freely.
+      </li>
+    </ul>
+    <div className={indexStyles.getting__started}>
+      <Link className={indexStyles.getting__started__link} to="/how-to">
+        Try it out &rarr;
+      </Link>
+    </div>
+    <h3>Signalboost is supported by:</h3>
+    <div className={indexStyles.funders}>
+      <img
+        className={indexStyles.funder__logo_moz}
+        src={mozillaLogo}
+        alt="mozilla logo"
+      />
+      <img src={calyxLogo} height="130" alt="calyx logo" />
+    </div>
+  </Layout>
+)
+
+export default IndexPage