Reddit AutoModerator Rules: Why Your Comment Vanished

Your comment probably did not get deleted by a person who read it and decided it was spam. If it vanished within seconds and nobody told you why, AutoModerator is the more likely cause — a rules engine each subreddit's moderators configure themselves, checking your account age, your karma, and whether your comment contains a link, all before anyone human ever sees it. Here's what it's actually checking, what Reddit's platform-wide rules add on top of that, and how to stop tripping it.

Why your comment disappeared and nobody told you

The most common version of this problem: you write something genuinely useful, it includes a link, and it's gone within seconds. No modmail, no explanation, sometimes not even a visible "removed" marker if the subreddit hides that from you. That instant timing is the tell. A human moderator reading a comment and deciding to remove it takes minutes or hours, not seconds. A removal that happens the moment you hit submit was a rule, not a person.

AutoModerator is not a moderator. It's a rulebook someone configured once

AutoModerator is a Reddit bot that any subreddit's moderator team can set up with its own rule file — and most active subreddits do. The rules it runs are entirely local to that subreddit: one can require every account to be at least 30 days old before commenting, another can allow brand-new accounts to post freely, and a third might have no AutoModerator configuration at all. Nothing about it is platform-wide except the tool itself.

This is why the same comment, posted with the same wording in two different subreddits, can survive in one and disappear instantly in the other. You're not being treated inconsistently by Reddit. You're hitting two different rule files that happen to share a name.

It also explains why searching for "the Reddit karma requirement" turns up conflicting answers. There isn't one. A subreddit that wants a clean, low-noise comment section can set its own minimum karma and account age before a link is allowed through — the specific numbers are that subreddit's choice, not a platform standard. A smaller or newer subreddit might never have configured AutoModerator at all, and let anything through until a human notices. Both are common; neither is the platform default, because there isn't one.

What actually trips it: karma, account age, and links

The specifics of any one subreddit's AutoModerator configuration are usually visible if you look — many subreddits post their minimum-karma or minimum-account-age requirement directly in the sidebar or the rules wiki, precisely because they want people to know before they hit the filter. There's no single number that applies everywhere; what's common is the shape of the rule, not the threshold. The recurring pattern across active subreddits:

• A minimum account age or karma count before your comment is allowed to include a link at all. This is the single most common trigger for a new account trying to share something.
• A flat restriction on links from accounts below a subreddit-set threshold, regardless of what the link points to or how the comment reads.
• Keyword and domain filters that catch a comment for review or remove it outright based on words or URLs it contains.

None of this is a judgment about your comment's quality. It's a checklist, and a comment fails it the same way whether it's genuinely spam or a sincere answer that happens to include a link.

The line Reddit draws: AI-assisted writing vs. autonomous posting

Separate from what any one subreddit configures, Reddit's platform-wide policy tightened substantially in 2026. On March 25, CEO Steve Huffman announced updates summarized as "Humans welcome (bots must wear name tags)": proof-of-humanness requirements for some accounts, a reported average of roughly 100,000 accounts banned per day for bot activity and spam, and an [APP] label for disclosed automation. What Reddit actually banned in 2026 breaks that policy down part by part.

The distinction that matters most for anyone using AI tools to help write replies: reporting on this policy is consistent that Reddit is not restricting a person who drafts a comment with an AI tool and posts it themselves. What the verification requirements target is an unattended script posting on its own. Reddit's own Content Policy on spam names "bots, generative AI tools" as things that can facilitate spam — but the operative word there is facilitate, tied to automated, unsolicited action, not to the act of using AI to help write a sentence you're posting yourself.

If you're building or using a tool that touches Reddit on your behalf rather than just helping you draft text, a separate and stricter document applies: Reddit's Responsible Builder Policy. It prohibits "spamming activity through automated posts, comments, or direct messages" and bars apps from attempting to "manipulate Reddit's features (e.g., voting, karma) or circumvent safety mechanisms." Violating it doesn't just get a comment removed — it can mean the app's access token gets revoked and the app itself suspended, which is a heavier consequence than anything AutoModerator does to an individual comment.

That prohibition and the [APP] label above are on the same page, a few paragraphs apart.

Source: support.reddithelp.com — Responsible Builder Policy — captured 2026-08-20

The blue outline is ours, added for this article. It is not part of Reddit's page.

Notice which document this is, because it decides a different question from everything else in this article. AutoModerator decides whether one comment survives in one subreddit; this page decides whether an app keeps its access at all. That is why the distinction in the section above is worth being precise about: a tool that drafts text for you to read and post yourself never touches this policy, while a tool that posts on your behalf is being judged by it from the first call it makes. We build on the first side of that line deliberately (disclosure: WarmList is ours) — it finds and scores the threads and hands them over, and it has no ability to post to Reddit at all.

CQS: the score you can't see

Underneath karma, Reddit is reported to run a second, non-public trust score: the Contributor Quality Score, or CQS. Reddit scheduling tool Postpone has published a detailed account of it — five tiers from Lowest to Highest, weighing account age, email verification, IP and device consistency, and the ratio of comments to posts. Postpone states plainly that "CQS is not the same as Karma." Because Reddit has not published its own documentation of CQS, treat this as third-party reporting, not confirmed platform mechanics — but if it's accurate, it means a high-karma account can still carry a low trust score, and that score is reported to affect how far your comments reach and how closely they get filtered, separately from any single subreddit's AutoModerator rules.

We measured how much more often a promotional comment gets removed

Everything above is policy and reporting. This is a measurement we ran ourselves: 5,600 comments across 12 subreddits, pulled via Arctic Shift (a free, public Reddit data API) on 2026-08-20, checking how often a self-promotional comment was removed compared to an ordinary comment in the same subreddit. The figures below exclude the newest 26 days, because Arctic Shift had not yet re-checked those comments for deletion, which would drag every rate down. Self-promotion was detected by a regular expression; reading 86 of its matches by hand, 22 were false positives, so treat every number here as carrying roughly 26% classification noise.

The direction of that last number matters more than the size of the first. Automated filters are usually described as a wall that self-promotion runs into, and in two of the five boards we could measure — r/SideProject and r/indiehackers, both around 1.8× — that is roughly what happens. In two more it is a wash (r/SaaSMarketing 1.01×, r/buildinpublic 0.99×), and in r/SaaS the filters and moderators removed ordinary conversation more often than self-promotion. A link from a low-karma account is still a common individual trigger; what our numbers say is that the subreddit's own configuration decides what that trigger costs, and you cannot guess it from the subreddit's name. Reddit's self-promotion rules has the full board-by-board figure, the 90/10 norm everyone quotes, and what Reddit's own written policy says instead.

One more result from the same pull is directly about AutoModerator's share of the work: of the 35 self-promotional comments we saw disappear, 34 were removed — the marker for a moderator, AutoModerator, or Reddit itself — and exactly one was deleted by its author. Whatever took your comment down, it was almost certainly not you.

What tends to get flagged, and what tends to get through

Putting the official rules, the AutoMod mechanics, and our own measurement together, a pattern falls out of what typically survives versus what typically doesn't:

Reddit's own crackdown keeps escalating

None of this is static. The direction has been the same for several years:

2023-04

Reddit announces paid API access, ending free large-scale third-party access to its data.

2026-03-25

Reddit announces "Humans welcome (bots must wear name tags)" — proof-of-humanness checks, a reported 100,000 daily bans for bot activity and spam, and a new [APP] label for disclosed automation.

2026-07-07

Forbes reports that AI-search manipulation — injecting content aimed at being cited by AI assistants rather than read by people — is emerging as a harder-to-catch gap in the same enforcement push.

Source: TechCrunch (2023-04), Engadget and Postpone's coverage of Reddit's 2026-03-25 announcement, Forbes (2026-07-07).

The trend across all three points in the same direction: less tolerance for anything that looks automated, and more infrastructure built specifically to detect it.

A pre-post checklist

Before you post something with a link in it, in order:

1. 1.Check the subreddit rules and sidebar for a stated karma or account-age minimumIf one is posted, treat it as a hard requirement, not a suggestion.
2. 2.Confirm you are answering something, not announcing somethingA reply to an actual question survives review far more often than an unprompted post.
3. 3.Read the comment once as if a moderator will read it in five secondsThat is roughly how long AutoModerator takes, and often how long a human skim gets too.
4. 4.Post it yourselfNothing here works if the account posting it looks automated in the first place.

None of this guarantees a comment survives. What it does is put you on the side of the pattern that tends to get through, instead of the side that tends to trip the filter before anyone's read a word of it.

If the larger goal is finding people who are already asking for what you built rather than posting and hoping, replying to existing threads is the method built around exactly that, and how to find customers on Reddit is the weekly routine version of it. For how the tools built to help with this compare, see the comparison hub.

Finding the thread is the only part we automate

Every item on that checklist happens at the moment you press post, and none of it can be handed off — step four exists precisely to keep a person in that seat. The step before it is a different kind of problem: finding the thread that is genuinely asking your question is search, not judgment, and that is the whole of what WarmList does. Paste a product URL, and one run reads the public timeline, scores 500+ posts, and returns each candidate with the post, the score, and the reason. $9, one run, no subscription. You still read it, still write it, and still press post from your own account — which is exactly the shape of behaviour the filters described above are built to let through.