diff --git a/src/components/general/workspace-avatar.tsx b/src/components/general/workspace-avatar.tsx
index 4c7bab1..4161d03 100644
--- a/src/components/general/workspace-avatar.tsx
+++ b/src/components/general/workspace-avatar.tsx
@@ -5,6 +5,7 @@ import { twMerge } from "tailwind-merge";
 import profileImageUrls from "@/src/utils/profile-image-urls";
 
 const WorkspaceAvatarSizes = {
+    xs: { box: "size-[18px] rounded-[4px]", icon: 12 },
     sm: { box: "size-8 rounded-default-sm", icon: 16 },
     lg: { box: "size-14 rounded-default", icon: 24 },
 } as const;
diff --git a/src/data/app-data.ts b/src/data/app-data.ts
index 3ff3c52..440749a 100644
--- a/src/data/app-data.ts
+++ b/src/data/app-data.ts
@@ -252,11 +252,16 @@ export const AppData = {
      * Worker bots the rail lists, most recently active first, before
      * "See all bots".
      */
-    RailRecentBots: 8,
+    RailRecentBots: 5,
     /**
-     * Stones shown beside "See all bots".
+     * Workspaces the rail lists, most recently active first, before
+     * "See all workspaces".
      */
-    RailSeeAllStones: 4,
+    RailRecentWorkspaces: 5,
+    /**
+     * Stones shown beside "See all bots" and "See all workspaces".
+     */
+    RailSeeAllStones: 3,
     /**
      * Recent sessions the rail lists under the open bot, before "All
      * sessions".
diff --git a/src/layouts/bots/(partials)/all-workspaces-modal.tsx b/src/layouts/bots/(partials)/all-workspaces-modal.tsx
new file mode 100644
index 0000000..3d4c7d1
--- /dev/null
+++ b/src/layouts/bots/(partials)/all-workspaces-modal.tsx
@@ -0,0 +1,51 @@
+import { useState } from "react";
+import Input from "@moduletrace/twui/form/Input";
+import Span from "@moduletrace/twui/layout/Span";
+import Stack from "@moduletrace/twui/layout/Stack";
+import type { WorkspaceWithActivity } from "@/src/types";
+import AddModalShell from "./add-modal-shell";
+import AllWorkspacesRow from "./all-workspaces-row";
+
+type Props = {
+    open: boolean;
+    setOpen: (open: boolean) => void;
+    workspaces: WorkspaceWithActivity[];
+};
+
+/**
+ * Every workspace, latest activity first, with a search by name or
+ * description. A workspace opens its page.
+ */
+export default function AllWorkspacesModal({ open, setOpen, workspaces }: Props) {
+    const [query, setQuery] = useState("");
+    const search = query.trim().toLowerCase();
+    const found = search
+        ? workspaces.filter((workspace) =>
+              `${workspace.name} ${workspace.description || ""}`.toLowerCase().includes(search),
+          )
+        : workspaces;
+
+    return (
+        <AddModalShell open={open} setOpen={setOpen} title="Workspaces" description={`${workspaces.length} in all.`}>
+            <Input
+                id="all-workspaces-search"
+                title="Search workspaces"
+                placeholder="Search by name or description"
+                autoComplete="off"
+                defaultValue={query}
+                onChange={(e) => setQuery(e.target.value)}
+                wrapperWrapperProps={{ className: "mt-4" }}
+            />
+            <Stack className="w-full mt-2 max-h-[60vh] overflow-y-auto gap-0! items-stretch">
+                {found.map((workspace) => (
+                    <AllWorkspacesRow key={workspace.id} workspace={workspace} />
+                ))}
+                {found.length ? null : (
+                    <Span className="px-3 py-6 text-[13px] leading-[18px] text-ink-secondary">
+                        No workspace matches "{query.trim()}".
+                    </Span>
+                )}
+            </Stack>
+        </AddModalShell>
+    );
+}
diff --git a/src/layouts/bots/(partials)/all-workspaces-row.tsx b/src/layouts/bots/(partials)/all-workspaces-row.tsx
new file mode 100644
index 0000000..d3d93f0
--- /dev/null
+++ b/src/layouts/bots/(partials)/all-workspaces-row.tsx
@@ -0,0 +1,37 @@
+import Link from "@moduletrace/twui/layout/Link";
+import Span from "@moduletrace/twui/layout/Span";
+import Stack from "@moduletrace/twui/layout/Stack";
+import WorkspaceAvatar from "@/src/components/general/workspace-avatar";
+import type { WorkspaceWithActivity } from "@/src/types";
+import relativeTime from "@/src/utils/relative-time";
+
+type Props = {
+    workspace: WorkspaceWithActivity;
+};
+
+/**
+ * One workspace in the all-workspaces modal: tile, name, description, last
+ * activity.
+ */
+export default function AllWorkspacesRow({ workspace }: Props) {
+    return (
+        <Link
+            href={`/admin/workspaces/${workspace.id}`}
+            title={workspace.name}
+            className="flex h-14 items-center gap-3 rounded-default px-3 border-0 leading-normal hover:opacity-100 hover:bg-sunken transition-colors duration-[var(--m-fast)] focus-visible:ring-2 focus-visible:ring-ink"
+        >
+            <WorkspaceAvatar image_media_id={workspace.image_media_id} />
+            <Stack className="grow min-w-0 gap-0!">
+                <Span className="text-sm font-bold leading-5 text-ink truncate w-full">{workspace.name}</Span>
+                <Span className="text-xs leading-4 text-ink-secondary truncate w-full">
+                    {workspace.unread ? "New messages" : workspace.description || ""}
+                </Span>
+            </Stack>
+            {workspace.last_activity_at ? (
+                <Span className="shrink-0 text-[11px] leading-4 text-ink-secondary">
+                    {relativeTime({ at: Number(workspace.last_activity_at) })}
+                </Span>
+            ) : null}
+        </Link>
+    );
+}
diff --git a/src/layouts/bots/(partials)/rail-bots-section.tsx b/src/layouts/bots/(partials)/rail-bots-section.tsx
index fcf8bb8..7a2f2b7 100644
--- a/src/layouts/bots/(partials)/rail-bots-section.tsx
+++ b/src/layouts/bots/(partials)/rail-bots-section.tsx
@@ -7,6 +7,7 @@ import AllBotsModal from "./all-bots-modal";
 import RailBotEntry from "./rail-bot-entry";
 import RailSectionLabel from "./rail-section-label";
 import RailSeeAllRow from "./rail-see-all-row";
+import RailSeeAllStone from "./rail-see-all-stone";
 
 type Props = {
     title: string;
@@ -55,7 +56,9 @@ export default function RailBotsSection({ title, workers, selected_id, workspace
             )}
             {hidden.length ? (
                 <RailSeeAllRow
-                    hidden={hidden}
+                    stones={hidden.slice(0, AppData.RailSeeAllStones).map((bot) => (
+                        <RailSeeAllStone key={bot.id} bot={bot} />
+                    ))}
                     label={`See all ${workers.length} bots`}
                     onOpen={() => setOpen(true)}
                 />
diff --git a/src/layouts/bots/(partials)/rail-see-all-row.tsx b/src/layouts/bots/(partials)/rail-see-all-row.tsx
index 39454cb..9dee893 100644
--- a/src/layouts/bots/(partials)/rail-see-all-row.tsx
+++ b/src/layouts/bots/(partials)/rail-see-all-row.tsx
@@ -1,26 +1,24 @@
+import type { ReactNode } from "react";
 import Button from "@moduletrace/twui/layout/Button";
 import Row from "@moduletrace/twui/layout/Row";
 import Span from "@moduletrace/twui/layout/Span";
 import { Ellipsis } from "lucide-react";
-import { AppData } from "@/src/data/app-data";
-import type { BotWithLastMessage } from "@/src/types";
-import RailSeeAllStone from "./rail-see-all-stone";
 
 type Props = {
     /**
-     * The bots the rail doesn't list.
+     * A few of the records the rail doesn't list, e.g. their stones.
      */
-    hidden: BotWithLastMessage[];
+    stones?: ReactNode;
     label: string;
     onOpen: () => void;
 };
 
 /**
- * Under the listed bots: a few stones of the ones that aren't listed and
- * "See all bots", which opens them all. An ellipsis when the rail
+ * Under the listed records: a few stones of the ones that aren't listed and
+ * "See all", which opens every one in a modal. An ellipsis when the rail
  * collapses.
  */
-export default function RailSeeAllRow({ hidden, label, onOpen }: Props) {
+export default function RailSeeAllRow({ stones, label, onOpen }: Props) {
     return (
         <Button
             title={label}
@@ -31,12 +29,10 @@ export default function RailSeeAllRow({ hidden, label, onOpen }: Props) {
             className="flex shrink-0 h-10 w-full items-center justify-center @rail:justify-start gap-3! rounded-default px-1! @rail:px-3! text-ink-secondary dark:text-ink-secondary hover:text-ink hover:dark:text-ink hover:bg-sunken hover:dark:bg-sunken transition-colors duration-[var(--m-fast)] focus-visible:ring-2 focus-visible:ring-ink"
         >
             <Ellipsis size={18} aria-hidden className="@rail:hidden" />
-            <Row className="hidden @rail:flex shrink-0 gap-1! flex-nowrap items-center">
-                {hidden.slice(0, AppData.RailSeeAllStones).map((bot) => (
-                    <RailSeeAllStone key={bot.id} bot={bot} />
-                ))}
-            </Row>
-            <Span className="hidden @rail:inline text-[13px] font-bold leading-4">{label}</Span>
+            {stones ? (
+                <Row className="hidden @rail:flex shrink-0 gap-1! flex-nowrap items-center">{stones}</Row>
+            ) : null}
+            <Span className="hidden @rail:inline text-[13px] font-bold leading-4 truncate">{label}</Span>
         </Button>
     );
 }
diff --git a/src/layouts/bots/(partials)/rail-see-all-workspace.tsx b/src/layouts/bots/(partials)/rail-see-all-workspace.tsx
new file mode 100644
index 0000000..1e27f46
--- /dev/null
+++ b/src/layouts/bots/(partials)/rail-see-all-workspace.tsx
@@ -0,0 +1,13 @@
+import WorkspaceAvatar from "@/src/components/general/workspace-avatar";
+import type { WorkspaceWithActivity } from "@/src/types";
+
+type Props = {
+    workspace: WorkspaceWithActivity;
+};
+
+/**
+ * One small workspace tile beside "See all workspaces".
+ */
+export default function RailSeeAllWorkspace({ workspace }: Props) {
+    return <WorkspaceAvatar image_media_id={workspace.image_media_id} size="xs" />;
+}
diff --git a/src/layouts/bots/(partials)/rail-workspaces-section.tsx b/src/layouts/bots/(partials)/rail-workspaces-section.tsx
index ab5a2de..df298d8 100644
--- a/src/layouts/bots/(partials)/rail-workspaces-section.tsx
+++ b/src/layouts/bots/(partials)/rail-workspaces-section.tsx
@@ -1,9 +1,13 @@
-import { useContext } from "react";
+import { useContext, useState } from "react";
 import Span from "@moduletrace/twui/layout/Span";
+import { AppData } from "@/src/data/app-data";
 import type { WorkspaceWithActivity } from "@/src/types";
 import { AddFlowContext } from "../(data)/add-flow-context";
+import AllWorkspacesModal from "./all-workspaces-modal";
 import RailSectionAddButton from "./rail-section-add-button";
 import RailSectionLabel from "./rail-section-label";
+import RailSeeAllRow from "./rail-see-all-row";
+import RailSeeAllWorkspace from "./rail-see-all-workspace";
 import WorkspaceRow from "./workspace-row";
 
 type Props = {
@@ -12,10 +16,15 @@ type Props = {
 };
 
 /**
- * The user's workspaces, with a "+" to create one.
+ * The user's workspaces, with a "+" to create one: the latest
+ * `AppData.RailRecentWorkspaces`, then "See all workspaces" for the rest,
+ * which lists them all in a modal.
  */
 export default function RailWorkspacesSection({ workspaces, selected_id }: Props) {
     const { openForm } = useContext(AddFlowContext);
+    const [open, setOpen] = useState(false);
+    const shown = workspaces.slice(0, AppData.RailRecentWorkspaces);
+    const hidden = workspaces.slice(AppData.RailRecentWorkspaces);
 
     return (
         <>
@@ -28,7 +37,7 @@ export default function RailWorkspacesSection({ workspaces, selected_id }: Props
                     />
                 }
             />
-            {workspaces.map((workspace) => (
+            {shown.map((workspace) => (
                 <WorkspaceRow key={workspace.id} workspace={workspace} selected={workspace.id == selected_id} />
             ))}
             {workspaces.length ? null : (
@@ -36,6 +45,16 @@ export default function RailWorkspacesSection({ workspaces, selected_id }: Props
                     No workspaces yet. A workspace keeps a project's context, bots and computers together.
                 </Span>
             )}
+            {hidden.length ? (
+                <RailSeeAllRow
+                    stones={hidden.slice(0, AppData.RailSeeAllStones).map((workspace) => (
+                        <RailSeeAllWorkspace key={workspace.id} workspace={workspace} />
+                    ))}
+                    label={`See all ${workspaces.length} workspaces`}
+                    onOpen={() => setOpen(true)}
+                />
+            ) : null}
+            <AllWorkspacesModal open={open} setOpen={setOpen} workspaces={workspaces} />
         </>
     );
 }