How much does it cost to make an app like Reddit?

The published 2026 figures are consistent. A community MVP runs $35,000 to $70,000 over 14 to 20 weeks, a full-featured platform $120,000 to $180,000, and enterprise-grade builds reach $500,000, with moderation infrastructure a separate $20,000 to $40,000 and AI moderation another $30,000 to $55,000¹². Here are the tiers, framed for a founder:

1. Community MVP ($35k to $70k)

   The core: community creation, post submission, threaded comments, voting with karma, basic sorting and ranking, user profiles, and basic moderation tools, cross-platform, in 14 to 20 weeks. This is the tier that launches, and it's built around communities and voting, not a feed, which is what makes it feel like Reddit.

2. Full platform ($120k to $180k)

   The MVP plus full-text search, notifications, rich media handling, analytics, a refined ranking algorithm, and stronger moderation tooling, often with AI-assisted moderation. The band where a community platform becomes robust enough to grow, built once early communities have proven they attract activity.

3. Scaled platform ($180k to $500k+)

   Infrastructure for many large, active communities, advanced trust and safety, recommendation and discovery, and the tooling to run governance at scale. Rarely needed to launch, and where content storage and moderation costs climb steeply with activity.

The usual caveat, these are vendors pricing their own work, applies. But Reddit rewards a structural question more than a price one: what makes a community platform different from a social network, and why does that difference decide where the money goes? That's the rest of this guide.

The vocabulary of a community-platform build, in plain English:

Community (subreddit)

A self-contained topic-based space with its own members, rules, and moderators, Reddit calls them subreddits. Thousands of them, each a small world, are the core structure of the platform. Building a Reddit-style app means building community creation and management, not a single global feed.

Pseudonymity

Users act under chosen handles rather than real names, so the platform is organized around interests and ideas, not real-world identity. It's the opposite of a professional or friend network, and it changes the trust and moderation problem entirely, freer expression, but more abuse to police.

Voting and karma

Upvotes and downvotes let the community rank content, and accumulated votes become a user's karma. Voting is the mechanic that surfaces the good and buries the bad without editors, and it's central to how a Reddit-style platform decides what everyone sees.

Ranking algorithm

The logic (hot, top, rising, and similar) that turns votes and time into the order posts appear in. It's more than sorting by score; it balances freshness and popularity, and getting it right is what makes a community feel alive rather than stale or gamed.

Volunteer moderation

Communities are run by unpaid volunteer moderators who set and enforce their own rules. It's Reddit's defining choice: it scales moderation cheaply across thousands of communities, but it means the platform doesn't fully control its own spaces, a real governance and risk trade-off.

Threaded discussion

Nested comment threads where replies attach to replies, so conversations branch rather than run flat. It's the backbone of the discussion experience and a specific engineering and design effort, distinct from a simple comment list, that a community platform has to get right.

Why this reframes the budget: a Reddit-style app doesn't need a friend graph or a personalized feed, the expensive cores of a Facebook-style build. It needs community creation and management, a voting and ranking system, and threaded discussion. And because it's pseudonymous and interest-based, it reaches critical mass differently: one active community at a time, not a spreading web of personal connections. The whole build points at communities and the mechanics that make them self-organizing, which is a different, and often more affordable, project than a personal social network.

The two sides are worth stating plainly. On cost: volunteer moderators handle the day-to-day enforcement across thousands of communities for free, which is dramatically cheaper than the professional moderation staff a consumer social platform must employ. On risk: communities can go rogue, moderators can strike or abuse their position, and the company inherits reputational and governance problems it didn't directly create. And it's not free of engineering, you still build the tools moderators use plus platform-level trust and safety, which is why moderation infrastructure adds $20,000 to $40,000 even with volunteers doing the enforcement¹.

Done well, voting and ranking make a community feel alive and fair: fresh content gets a chance, popular content rises, and no single loud voice dominates. Done poorly, the platform feels stale, gamed, or captured by a vocal minority. The ranking algorithm has to balance freshness against popularity and resist manipulation and vote brigading, which is why it's more than sorting by score and deserves proper attention in the build². For your budget, treat voting and ranking as a core system, not a checkbox, because it's one of the two or three things that determine whether your platform feels like a living community or a dead forum.

1. Communities and threaded discussion

   Community creation and management plus nested comment threads are the structural heart of the platform, and more engineering than a single feed with flat comments. Building spaces that each have their own members, rules, and moderators is the defining, non-trivial work.

2. Voting and the ranking algorithm

   The upvote-downvote system, karma, and the hot-and-top ranking logic that surfaces content without editors. It's core to the experience and genuinely tricky, balancing freshness and popularity while resisting manipulation, so it deserves real budget rather than a naive sort-by-score.

3. Moderation infrastructure

   Even with volunteer moderators running communities, you need the tools they use plus platform-level trust and safety: reporting, anti-spam, and handling illegal content. It's not optional, adds $20k to $40k, and AI moderation adds more. The volunteer model saves payroll, not the tooling.

4. Content storage and scale

   User-generated posts, images, and increasingly video accumulate forever and drive monthly operating costs of $3k to $12k for a growing platform. A community app's running cost scales with how much its users post, which is the success you're building for, so budget for it.

The pattern to notice: a community platform's costs scale with how much its users post, which is exactly the success you're building for. More activity means more storage, more moderation, and more infrastructure, so budget for growth rather than treating running costs as fixed. This is the modeling most clone-cost articles skip, and it's the first thing we price when we scope a community build.

The 2026 translation isn't to fake users; it's to recognize that a community platform's hardest problem is the cold start, and it's solved with seeding and curation, not features⁴⁵. Build the lean community MVP, the tier this guide starts with, then do the unscalable work of making your first communities active: seed content, recruit early members, set the culture. Reddit didn't out-engineer its rivals; it manufactured the feeling of a crowd until a real one showed up. The app is buildable; making it feel alive on day one is the real work, and it's worth more than any feature.

Community platforms share their cold-start and moderation challenges with the other social products here, so our breakdowns of an app like Facebook and an app like X (Twitter) are close companions. For the numbers underneath, see our mobile app development cost guide and how to scope an MVP.

And if you'd rather have a number than a range, our free 48-hour build plan turns your community into a written scope, a milestone breakdown, and a fixed quote. No sales call, no obligation. Ready to move? Start a build.