diff --git a/src/components/rpc-chains-leaderboard.tsx b/src/components/rpc-chains-leaderboard.tsx
index bdb4e0f6..5568ce46 100644
--- a/src/components/rpc-chains-leaderboard.tsx
+++ b/src/components/rpc-chains-leaderboard.tsx
@@ -21,6 +21,7 @@ import type { RpcHubChain, RpcRegionKey } from "@/lib/rpc-hub-stats";
 type SortKey =
   | "name"
   | "bestP50"
+  | "bestP90"
   | "us-east"
   | "eu-west"
   | "sgp"
@@ -35,6 +36,7 @@ const REGION_COLS: { key: RpcRegionKey; label: string }[] = [
 function sortValue(r: RpcHubChain, k: SortKey): number | string | null {
   if (k === "name") return r.name.toLowerCase();
   if (k === "bestP50") return r.best?.p50Ms ?? null;
+  if (k === "bestP90") return r.bestP90Ms ?? null;
   if (k === "providerCount") return r.providerCount;
   return r.regions[k]?.p50Ms ?? null;
 }
@@ -118,6 +120,15 @@ export function RpcChainsLeaderboard({ rows }: { rows: RpcHubChain[] }) {
                   Best overall (3-region avg)
                 </span>
               </ThSort>
+              <ThSort
+                active={sortKey === "bestP90"}
+                dir={sortDir}
+                onClick={() => setSort("bestP90")}
+              >
+                <span title="p90 latency of the same overall-best provider — the slow-tail number users actually feel. Empty when the provider's histogram doesn't have enough samples yet.">
+                  Best p90
+                </span>
+              </ThSort>
               {REGION_COLS.map((c) => (
                 <ThSort
                   key={c.key}
@@ -149,20 +160,30 @@ export function RpcChainsLeaderboard({ rows }: { rows: RpcHubChain[] }) {
                   {i + 1}
                 </Td>
                 <Td>
-                  <Link
-                    href={`/benchmarks/${r.slug}`}
-                    className="flex items-center gap-2 min-w-0 group"
-                    onClick={(e) => e.stopPropagation()}
-                  >
-                    <ProviderLogo slug={r.chain} name={r.name} size={18} />
-                    <span className="font-medium text-ink truncate group-hover:underline underline-offset-2">
-                      {r.name}
-                    </span>
-                    <ChevronRight
-                      size={14}
-                      className="text-ink-faint shrink-0 opacity-0 group-hover:opacity-100 transition-opacity"
-                    />
-                  </Link>
+                  <div className="flex items-center gap-2 min-w-0">
+                    <Link
+                      href={`/benchmarks/${r.slug}`}
+                      className="flex items-center gap-2 min-w-0 group"
+                      onClick={(e) => e.stopPropagation()}
+                    >
+                      <ProviderLogo slug={r.chain} name={r.name} size={18} />
+                      <span className="font-medium text-ink truncate group-hover:underline underline-offset-2">
+                        {r.name}
+                      </span>
+                      <ChevronRight
+                        size={14}
+                        className="text-ink-faint shrink-0 opacity-0 group-hover:opacity-100 transition-opacity"
+                      />
+                    </Link>
+                    <Link
+                      href={`/chains/${r.chain}`}
+                      className="text-[10px] text-ink-faint hover:text-ink underline underline-offset-2 shrink-0"
+                      title={`Open the ${r.name} chain hub (KPI cards + full RPC leaderboard)`}
+                      onClick={(e) => e.stopPropagation()}
+                    >
+                      hub
+                    </Link>
+                  </div>
                 </Td>
                 <Td>
                   {r.best ? (
@@ -186,6 +207,15 @@ export function RpcChainsLeaderboard({ rows }: { rows: RpcHubChain[] }) {
                     <span className="text-ink-faint">...</span>
                   )}
                 </Td>
+                <Td mono>
+                  {r.bestP90Ms != null ? (
+                    <span className="tabular-nums text-ink-soft">
+                      {fmtMs(r.bestP90Ms)}
+                    </span>
+                  ) : (
+                    <span className="text-ink-faint">-</span>
+                  )}
+                </Td>
                 {REGION_COLS.map((c) => {
                   const b = r.regions[c.key];
                   return (
@@ -215,7 +245,7 @@ export function RpcChainsLeaderboard({ rows }: { rows: RpcHubChain[] }) {
                   mono
                   tip={
                     r.unresponsiveCount
-                      ? `${r.unresponsiveCount} cohort provider${r.unresponsiveCount > 1 ? "s" : ""} currently unresponsive on ${r.name} (probed, all calls failing). Not counted in best/fastest.`
+                      ? `${r.unresponsiveCount} cohort provider${r.unresponsiveCount > 1 ? "s" : ""} currently unresponsive on ${r.name} (probed, all calls failing). Not counted in best/fastest. Providers: ${(r.unresponsive ?? []).map((u) => u.name).join(", ") || "n/a"}`
                       : undefined
                   }
                 >
@@ -243,7 +273,7 @@ export function RpcChainsLeaderboard({ rows }: { rows: RpcHubChain[] }) {
             {filtered.length === 0 && (
               <tr>
                 <td
-                  colSpan={8}
+                  colSpan={9}
                   className="px-3 py-8 text-center text-[12px] text-ink-faint"
                 >
                   No chain matches &ldquo;{q}&rdquo;.
diff --git a/src/lib/rpc-hub-stats.ts b/src/lib/rpc-hub-stats.ts
index 350e67fe..dd520984 100644
--- a/src/lib/rpc-hub-stats.ts
+++ b/src/lib/rpc-hub-stats.ts
@@ -54,6 +54,7 @@ export type RpcHubProvider = {
   provider: string;
   name: string;
   p50Ms: number;
+  p90Ms?: number;
   p99Ms?: number;
   successPct?: number;
   sampleSize?: number;
@@ -88,6 +89,8 @@ export type RpcHubChain = {
    *  field: old blobs without it still parse. */
   unresponsive?: RpcHubUnresponsiveProvider[];
   best: RpcRegionBest | null;
+  /** p90 of the overall best provider (same row as `best`). Optional so old blobs stay parseable. */
+  bestP90Ms?: number;
   /** Best provider per probe region. */
   regions: Partial<Record<RpcRegionKey, RpcRegionBest>>;
   /** Full live provider field, sorted fastest first. */
@@ -265,11 +268,13 @@ async function buildChain(spec: Spec): Promise<RpcHubChain | null> {
         }
       : {}),
     best: { provider: leader.slug, providerName: leader.name, p50Ms: round1(leader.ms.p50) },
+    bestP90Ms: Number.isFinite(leader.ms.p90) && leader.ms.p90 > 0 ? round1(leader.ms.p90) : undefined,
     regions,
     providers: rows.map((r) => ({
       provider: r.slug,
       name: r.name,
       p50Ms: round1(r.ms.p50),
+      p90Ms: Number.isFinite(r.ms.p90) && r.ms.p90 > 0 ? round1(r.ms.p90) : undefined,
       p99Ms: Number.isFinite(r.ms.p99) && r.ms.p99 > 0 ? round1(r.ms.p99) : undefined,
       successPct:
         Number.isFinite(r.successRate) && r.successRate > 0