How does the Reddit algorithm decide which posts to show first?

Reddit uses a variant of the Hot algorithm that ranks posts by upvote velocity divided by an age factor. Posts that earn upvotes fast in the first hour rank higher. Comment engagement, controversial score, and dwell time also feed into ranking. Each feed (subreddit Hot, r/all, Home) uses a slightly different blend of these signals.

Does commenting matter as much as upvoting?

Comments matter more than upvotes for a post's longevity. An upvote is a one-second signal. A comment is proof that someone engaged deeply. Reddit's Hot algorithm weights comment count and comment quality, which is why posts with 200 upvotes and 100 comments often outrank posts with 500 upvotes and 10 comments.

Why do some posts get buried even with good upvotes?

Usually either negative comment signal, low dwell time, or automod flags. A post with 80 percent upvote ratio and mostly negative comments gets buried even if total upvotes look strong. Reddit also applies controversial scoring that penalizes posts with heavy downvoting alongside upvotes. Shadowbans and subreddit filters can also silently kill distribution.

How does Reddit's algorithm treat new accounts?

New accounts under 30 days old and under 100 karma are heavily filtered. Posts from new accounts often require manual mod approval. Even when approved, the algorithm weights them less in Hot ranking until the account builds history. This is why brands should warm accounts for a month before using them for anything important.

How Does the Reddit Algorithm Work in 2026?

The Reddit algorithm ranks posts using a blend of upvote velocity, comment engagement, time decay, and subreddit-specific signals. The core ranking function is Reddit's Hot algorithm, which has been public for years but has evolved significantly since 2020. In 2026, comment quality and dwell time carry more weight than they used to, and new account filters are stricter. Understanding how ranking works is the difference between posts that land and posts that die silently.

The Core Hot Algorithm

The simplified version of Hot is:

score = log10(upvotes - downvotes) + (age_factor)

The log10 means the first 10 upvotes matter as much as the next 100, and the next 100 matter as much as the next 1000. This is why early momentum is everything. A post that gets 10 upvotes in the first 10 minutes beats a post that gets 30 upvotes over an hour.

The age factor is a time decay. The older the post, the lower the rank, even if it keeps accumulating upvotes. In practice, most posts have their rank decided in the first 1 to 3 hours after posting.

What Reddit's Algorithm Actually Weights in 2026

Upvote Velocity

How many upvotes per minute the post accumulates in its first hour. This is still the single strongest signal.

Comment Velocity and Depth

Comments posted quickly drive ranking, and nested comment threads indicate real engagement. A post with 50 comments averaging 3 replies deep beats a post with 200 top-level-only comments.

Upvote Ratio

The percentage of upvotes relative to total votes. A post with 1000 upvotes and a 60 percent ratio is treated as more controversial than a post with 400 upvotes and a 95 percent ratio. Subreddit Hot tends to favor high-ratio posts. r/all sometimes surfaces controversial ones.

Dwell Time

How long users spend on the post before clicking back. Added more prominently in recent years. Short headlines that drive fast bounces underperform posts that keep attention.

Subreddit Signals

Mod approvals, flair, post type (text vs link), and community-specific upvote norms. Text posts generally do better than link posts in most subs because they signal community contribution rather than self-promotion.

Account Age and Karma

New or low-karma accounts get filtered. Old accounts with comment karma across many subs are treated as more trustworthy.

What Gets Buried

Posts from new accounts
Posts that trigger automod rules
Posts with heavy early downvotes
Posts with negative sentiment in early comments
Posts flagged as spam by users
Posts that match banned URL patterns

A post can look great in absolute numbers and still be buried because one of these filters kicked in early. This is common with promotional content even when the content is otherwise good.

Subreddit Hot vs r/all vs Home Feed

Reddit runs multiple feeds, each with slightly different ranking.

Subreddit Hot: Standard Hot algorithm, scoped to posts in that subreddit, with subreddit-specific signals layered in.

r/all: Aggregates across subs, weights larger subs more, and filters out NSFW and blocked subs.

Home Feed: Personalized based on user subscriptions, upvote history, and recent dwell time. This is why two users see different posts on Home even if subscribed to similar subs.

For marketers, Subreddit Hot is the target. r/all is mostly not worth chasing because the audience is too broad. The Home Feed matters for users who have already subscribed to your sub but is not a distribution channel for external growth.

How the Algorithm Interacts With Moderation

Mods can boost posts through flair and sticky. They can also shadow-remove posts so only the poster sees them. Automod rules run first and often kill posts before the main algorithm sees them. This is why reading the rules of each sub is not optional. Automod handles most removals.

What This Means for Posting Strategy

Post when your subreddit is active to catch the early upvote window
Write titles that invite comments, not just upvotes
Engage in the first hour by replying to early comments
Avoid link-only posts in subs that reward text discussion
Build account history before posting anything that matters

Founders running multiple Reddit accounts across different brands face an additional challenge: each account needs genuine history and behavior patterns that match Reddit's trust signals. Running this manually at scale is impractical. Platforms like Conbersa operate accounts with real device fingerprints and behavior that matches normal human use, which is what keeps accounts in good standing with the algorithm over time.

What Does Not Matter as Much as People Think

Tagging posts with flair (marginal, varies by sub)
Post length (longer posts do slightly better but not dramatically)
Images vs text (depends entirely on sub norms)
Posting on specific days (timing within the active hours of your sub matters more than day of week)

Where the Algorithm Is Heading

Reddit is investing heavily in ranking quality for AI training and AI search. The 2026 direction is toward posts that demonstrate real expertise, real stories, and real engagement. Low-effort karma-farming posts are filtered harder every quarter. Genuine contributors get more reach. This aligns with what works long-term anyway: show up with real value.