r/LangChain
Founded January 2023 · Public — anyone can post
LangChain enables every company to own their intelligence. Control, govern, and compound intelligence with an open agent engineering ecosystem. It is available for Python and Javascript at https://www.langchain.com/.
Members
106,953
107K
Online now
—
not captured in the last snapshot
Posts per day
—
no sample yet
Comments per post
—
no sample yet
Growth · 7d
—
not enough history yet
Growth · 30d
+2.1%
+2.2K members · ≈32d
Published rules
3
1 mention promotion — quoted below
Last post
—
no sample yet
Distinct posters
—
no sample yet
Tracking since Aug 9 · growth spans are the real distance between snapshots, not rounded windows. Posts/day is measured from the community’s own newest posts on Reddit, not from what Prowlo happens to crawl.
Member growth
What works in r/LangChain
Every post in a recent sample, labelled by format. Share is how much of the sample used that format; average score is how it performed.
| Format | Share of posts | Avg score |
|---|---|---|
| Question | 35% | 39 |
| Show & tell | 23% | 59 |
| Discussion | 18% | 66 |
| Lessons / story | 13% | 99 |
| News / link | 4% | 27 |
| How-to | 3% | 90 |
| Promo | 3% | 1 |
| Tool comparison | 1% | 114 |
Based on 71 posts sampled in September 2026. A sample, not the full history.
- Median score
- 18
- Top 10% score
- 124
- Text posts
- 63%
- Got no replies
- 18%
- Busiest windows
- Tue 17:00 UTC, Mon 05:00 UTC
Posting rules, in plain words
Self-promotion is judged case by case.
- Keep posts relevant: Posts should be relevant to LangChain or related topics. Spam will be removed. Habitual spam may result in the suspension or removal of your posting privileges.
Quoted from the community’s own published rules. Always re-read them before posting.
What a good comment looks like here
- — Offers specific, actionable advice or solutions.
- — Shares first-hand experience from production or real-world projects.
- — Compares different tools or approaches with pros and cons.
- — Asks clarifying questions to understand the problem better.
- — Acknowledges the original poster's pain points.
- — Provides links to relevant resources or code.
What r/LangChain's rules say about promotion
1 of 3 published rules mentions promotion, advertising or spam. Quoted from the community's own rules page, not summarised.
Keep posts relevant
rule 1 of 3
Posts should be relevant to LangChain or related topics. Spam will be removed. Habitual spam may result in the suspension or removal of your posting privileges.
Removal reason shown to posters: Posts should be relevant to LangChain or related topics
The other 2
- No NSFW/explicit content
- Be nice
Read from r/LangChain’s published rules on Sep 13. Communities change their rules without notice and enforce requirements (karma, account age, flair) that may live in the sidebar or automod rather than here — the source page is the authority.
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Shared audience
Posters in r/LangChain also post in…
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See the full lists on similar subreddits.
r/LangChain — frequently asked
How many members does r/LangChain have?
r/LangChain has 106,953 members as of our most recent crawl on Sep 10. Prowlo re-checks tracked communities on a rolling schedule, so this figure moves rather than sitting frozen at whatever it was when a scraper last ran.
Is r/LangChain growing?
Over the last ≈32 days r/LangChain changed by +2.1% — a gain of 2.2K members. We compare against the nearest snapshot we actually hold and state the real span rather than rounding it to a clean "30 days".
How active is r/LangChain?
We don't have a reliable posting-rate sample for r/LangChain yet. Subscriber count alone is a poor guide to whether a community is active, so treat this one as unverified until the next sample lands.
When was r/LangChain created?
r/LangChain was founded in January 2023 and is a public — anyone can post community. Age matters: an older community with steady growth has survived Reddit's moderation churn; a young one with a spike may not.
Can I promote my product in r/LangChain?
r/LangChain publishes 3 rules and 1 of them addresses promotion. The first, “Keep posts relevant”, says: Posts should be relevant to LangChain or related topics. Spam will be removed. Habitual spam may result in the suspension or removal of your posting privileges. Read the full rule text on this page and the community's rules page before posting — moderator enforcement is the thing that actually decides.
How do I monitor r/LangChain for mentions?
Hit Watch on this page. Prowlo starts crawling r/LangChain into your Dataset — every new post indexed and embedded, searchable semantically, queryable by your AI agent over MCP, and able to trigger keyword alerts in Slack. Prowlo is read-only; it never posts on your behalf.
Can my AI agent read r/LangChain's stats?
Yes. Everything on this page is one MCP tool call away: catalog_get_subreddit returns r/LangChain's members, growth, promo tolerance and similar communities as typed JSON — free, no credits. Connect your agent to api.prowlo.com/mcp and it can vet the community and start watching it in the same conversation.
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