Comment Actions

Automatically reply, moderate, or delete comments using rules you define.

Comment Actions let you define rules that watch your incoming comments 24/7 and take an action automatically: send a reply, hide the comment, delete it, or just email you. Each rule has two parts, a trigger that decides which comments to act on and an action that says what to do when one matches.

How rules are evaluated

When a new comment arrives, CommentShark checks it against your active rules. The first rule that matches wins, and the rest are skipped for that comment, so a comment never triggers two rules.

The order is worked out for you rather than set by hand. Text rules are checked before AI rules, because they are instant and free. Within your text rules, the most specific pattern goes first: an exact match beats a starts-with, which beats a keyword match, which beats a catch-all. Rules of equal specificity are checked most-recently-edited first.

  • Rules are forward-looking. A rule only sees comments that arrive after you create it, never your back catalogue.
  • Use Replay rules (three-dot menu on the Rules tab, paid plans) to run your current rules against one video or a past date range.
  • Rules never fire on your own channel's comments, or on a thread you have already replied to, which is what stops reply loops.
  • If two rules could both catch the same comment, use Test all rules to see which one actually wins before you find out in production.

CommentShark syncs new comments from YouTube every 30 minutes. This means the average time between a comment being posted and a rule acting on it is around 15 minutes, with a maximum of about 30 minutes.

If you create a new rule and want it to cover older comments too, use Replay rules from the Rules tab. You can replay one video or re-run rules across your channel from a past date without sending action emails.

How the rule editor works

Every rule reads as one sentence: "If [match] on [videos], [action]. Do this [when], [how soon] and [notify me or not]." Each bracketed part is a chip you click to pick or type a value. There are no forms and no wizard steps, and nothing is hidden in a settings panel: what the sentence says is what runs.

Match: how a comment qualifies

The first chip picks the test, and the chip next to it holds the value you are testing for. Five of the options are text-based and one is AI:

  • Keyword match: fires when the comment contains any of the words or phrases you list. Separate alternatives with a comma.
  • Starts with: fires only when the comment opens with your text.
  • Exact match: fires only when the whole comment is exactly your text and nothing else.
  • Regex match: your own regular expression, for when the pattern is more than a word list.
  • Any comment: matches everything on the videos you scope it to. Powerful and easy to overuse, since every match spends a comment action.
  • AI detects: you describe the kind of comment in plain English ("asking whether the course suits their situation", "frustrated about the price") and the AI decides. Use this for intent and nuance that no word list can pin down.

Rule of thumb: if you can write down the words you are looking for, use a text match, because it is instant and never guesses. If you are describing an idea rather than a phrase, use AI detects. Either way, an action that fires counts the same against your monthly comment actions, so the choice is about accuracy, not cost.

Videos: where the rule watches

By default a rule applies to every video on your channel, including uploads that don't exist yet. You can narrow it to specific videos, which is what you want for a launch or a giveaway, and optionally restrict it by comment date (for example only comments from the first 7 days after a video goes live).

Action: what happens on a match

  • Reply with a template: the same message every time, with placeholders like the commenter's name filled in.
  • Reply with AI: a fresh reply per comment, written from the instructions you give the rule plus your Channel Context, so it lands in your voice instead of a generic one.
  • Hold for review: hides the comment from your video and holds it in your YouTube Studio review queue, so you can still get it back.
  • Delete the comment: permanent and not reversible. Requires write permission. For most cases hold for review is the safer version of the same idea.
  • Notify me by email: takes no action on the comment at all, it just tells you it happened. This is the one to use for leads.

Run: automatically or after your approval

The Run chip decides whether CommentShark acts for you or waits for your OK. Automatically suits high-confidence rules, like templated replies and obvious spam. After approval suits anything AI-written or hard to undo: the action queues up, you see the comment and the drafted reply side by side, and you can edit the wording before approving.

Next to it, a timing chip decides how soon the action runs. ASAP is the default. Paid plans can set a delay of anything from five minutes to a day, for when an instant reply would read as robotic. The delay applies to rules that run automatically: under approval, your review is the wait.

Notify: whether this rule emails you

The last chip decides whether you get an email each time this rule fires. Turn it on while you are still tuning a rule, or for rules that fire rarely and matter a lot. Turn it off once it is settled: everything is still in your activity feed either way.

Test before you enable

The editor has a built-in tester. Hit Test, paste a sample comment or pick one of your own recent ones, and you get the verdict, the reason behind it, and the exact reply that would have been sent, without anything reaching YouTube. Test one comment you want the rule to catch and one you want it to ignore: the second is the test that finds mistakes.

Test all rules, in the three-dot menu on the Rules tab, runs the same check against every active rule at once. That is how you see which rule wins when two of them could catch the same comment.

Three rules for great rules

Most rules that quietly do nothing fail for one of three reasons. Sidestep them and your rules pull their weight from day one.

  1. Match unique words, not common ones

    Common words fire on everything, so you get false positives, or the real matches get buried in noise. Match the distinctive word instead.

    • link
    • help
    • price
    • Your product or opt-in name: “ToneForge”, “RESET”, your course title
    • For “where’s the link?” comments, match the product name, not the word “link”

    Listing options in a Keyword match? Separate them with commas: “camera, lens, tripod” matches a comment containing any one of them, where “camera lens tripod” only matches that exact phrase.

  2. For AI rules, describe intent precisely, including what to exclude

    Vague descriptions match everything or nothing. Name the topic, then give the boundary.

    • “questions”
    • “negative comments”
    • “Comments asking which specific camera, lens, or mic I use to film, not general software or how-to questions”

  3. Start cautious: test it, then run it on approval first

    You don’t have to trust a new rule blind. Prove it, then ease into automation.

    • Test with a few real comments before enabling: you see the match and the exact reply, and nothing posts to YouTube
    • Set new rules to “After I approve” for the first week; approve, skip, and tweak from your inbox, then switch to “Automatically” once you trust it

Follow-up rules: multi-step conversations

A follow-up rule continues a conversation after your first automated reply. When the original commenter replies to it, the follow-up rule evaluates what they said and can send another message, which is how you build a multi-step sequence.

How the thread works:

  • A viewer comments on your video
  • Your root rule matches and your bot replies
  • The same viewer replies to your bot's comment
  • Your follow-up rule evaluates their reply and acts on it
  • This can continue for as many steps as you define
  • Only the original commenter's replies are evaluated. Other viewers who join the thread are ignored.
  • Threads are monitored for up to 10 days after the root comment.
  • Each follow-up step counts toward your plan's rule limit, and each one that fires spends one comment action, the same as any other rule.
  • Follow-up rules use the same matches and actions as root rules, so you can use AI detection at any step.

A common use case: a viewer asks about your course, your bot replies with a short answer and asks "Want the full details?", and your follow-up rule catches "yes"/"sure"/"tell me more" and sends a link.

Monitoring with the Activity tab

The Activity tab is the receipt for everything. Each row carries the comment, the rule that matched it, the action taken, and the status: posted, queued, skipped, cancelled, or failed. When a rule behaves in a way you did not expect, start here.

Comments that matched nothing are recorded too, which is how you spot a rule that is narrower than you thought. Failed actions carry the reason, usually a missing permission or a comment that was deleted on YouTube before we reached it.

Frequently asked questions

How does it work?+
CommentShark connects to your YouTube channel via the official API. You set up "Rules" that match specific text, use AI classification, or text matching patterns. When a new comment matches a rule, CommentShark can automatically reply, moderate (hold for review or reject), or delete the comment—running 24/7 in the background. You choose whether actions happen automatically or require your approval.
How do I automatically reply to YouTube comments?+
Sign in with your YouTube account, create auto reply rules with text match or AI triggers, choose a response template or AI-generated reply, and activate the rule so CommentShark can post for you 24/7.
What are YouTube auto reply rules and how do they work?+
Auto reply rules combine a match condition, a response, and a posting mode. CommentShark monitors incoming comments, checks them against your rule logic, and either posts immediately or queues the reply for approval based on your settings.
How long does it take for automations to reply to comments?+
Comment actions execute after comments are synced from YouTube. Paid channels sync every 30 minutes, so the average response time is around 15 minutes. Free tier channels sync every 2 hours, so actions can take up to a couple of hours. This sync schedule ensures reliable delivery while managing API quota efficiently. You can see which comments were read and which ones matched your rules in the Activity tab.
Can I review replies before they are sent?+
Yes! You can choose between Autonomous mode (replies are posted immediately) or Approval Required mode. In Approval Required mode, all AI-generated replies go to a queue where you can edit, approve, or reject them before they go live.
Do automation rules apply to existing comments?+
Not on their own. Automation rules are forward-looking by default, so they only apply to new comments that arrive after you enable the rule. This prevents accidentally spamming replies on old videos or comments you've already handled manually. When you do want to cover the backlog, paid plans can deliberately replay a rule on older comments from a single video or from a past date you choose.
How can I see which comments CommentShark has read?+
The Activity tab shows all comments that CommentShark has read, including which ones matched your rules and which were skipped. You can see exactly why a comment matched (or didn't match), which rule triggered, and what action was taken. This is helpful for debugging rules and understanding your automation's behavior.
Can I test comment rules before making them live?+
Yes! Use the "Test all rules" button on the auto-reply rules page. Simply paste sample comment text to instantly see which rules match, why they matched, and what response would be generated, without posting anything to YouTube. This is the fastest way to verify your rule logic without waiting for actual comments.
Can CommentShark automatically moderate or delete comments?+
Yes! Beyond automatic replies, you can create rules that hold comments for review, reject them outright, or delete your own replies/comments. For comments left by other viewers, YouTube's API removes them via moderation actions rather than direct deletion. This is perfect for filtering spam, hate speech, or policy-violating content before it appears on your videos. Learn more about our YouTube comment moderation capabilities.
What are follow-up rules?+
Follow-up rules let you build multi-step conversation funnels. When your bot replies to a comment and the original commenter replies back, CommentShark can automatically continue the conversation with the next step you've defined. This is great for lead capture, onboarding sequences, or guiding viewers through a series of questions.
How many follow-up steps can I have?+
There is no hard limit on the number of follow-up steps. You can add as many steps as you need to build your conversation funnel. Each follow-up step counts toward your plan's rule limit.
Do follow-up rules count toward my rule limit?+
Yes. Follow-up steps count toward your plan's rule limit just like regular rules. Each follow-up reply that gets posted also counts as one comment action toward your monthly comment-action quota (the same quota that covers auto-rule executions and manual replies).
Will CommentShark reply to my own comments?+
No. CommentShark automatically ignores comments made by the channel owner and comments you've already replied to. This prevents infinite reply loops and duplicate responses. Rules also only apply to new comments received after the rule is enabled (they are forward-looking).
Will my comments be classified as spam?+
No. Comments on YouTube are classified as spam by Youtube if they violate policy guidelines. You can read more about YouTube's spam policies and community guidelines.

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