diff --git a/src/slack/monitor/provider.ts b/src/slack/monitor/provider.ts
index ee440d56555..4db17c533d3 100644
--- a/src/slack/monitor/provider.ts
+++ b/src/slack/monitor/provider.ts
@@ -112,7 +112,7 @@ export async function monitorSlackProvider(opts: MonitorSlackOpts = {}) {
   const useAccessGroups = cfg.commands?.useAccessGroups !== false;
   const reactionMode = slackCfg.reactionNotifications ?? "own";
   const reactionAllowlist = slackCfg.reactionAllowlist ?? [];
-  const replyToMode = slackCfg.replyToMode ?? "off";
+  const replyToMode = slackCfg.replyToMode ?? "all";
   const threadHistoryScope = slackCfg.thread?.historyScope ?? "thread";
   const threadInheritParent = slackCfg.thread?.inheritParent ?? false;
   const slashCommand = resolveSlackSlashCommandConfig(opts.slashCommand ?? slackCfg.slashCommand);