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A link aggregator / reddit clone for the fediverse.

Lemmy Dev instance for testing purposes only

This is a very early beta version, and a lot of features are currently broken or in active development, such as federation.

Front Page Post
main screen chat screen


  • Open source, AGPL License.
  • Self hostable, easy to deploy.
  • Live-updating Comment threads.
  • Full vote scores (+/-) like old reddit.
  • Moderation abilities.
    • Public Moderation Logs.
    • Both site admins, and community moderators, who can appoint other moderators.
    • Can lock, remove, and restore posts and comments.
    • Can ban and unban users from communities and the site.
  • Clean, mobile-friendly interface.
  • i18n / internationalization support.
  • NSFW post / community support.
  • Cross-posting support.
  • A similar post search when creating new posts.
  • Can transfer site and communities to others.
  • High performance.
    • Server is written in rust.
    • Front end is ~80kB gzipped.


Lemmy is similar to sites like Reddit,, Raddle, or Hacker News: you subscribe to forums you're interested in, post links and discussions, then vote, and comment on them. Behind the scenes, it is very different; anyone can easily run a server, and all these servers are federated (think email), and connected to the same universe, called the Fediverse.

For a link aggregator, this means a user registered on one server can subscribe to forums on any other server, and can have discussions with users registered elsewhere.

The overall goal is to create an easily self-hostable, decentralized alternative to reddit and other link aggregators, outside of their corporate control and meddling.

Each lemmy server can set its own moderation policy; appointing site-wide admins, and community moderators to keep out the trolls, and foster a healthy, non-toxic environment where all can feel comfortable contributing.

Why's it called Lemmy?

Made with Rust, Actix, Inferno, Typescript and Diesel.



Make sure you have both docker and docker-compose(>=1.24.0) installed.

mkdir lemmy/
cd lemmy/
# Edit the .env if you want custom passwords
docker-compose up -d

and goto http://localhost:8536

A sample nginx config, could be setup with:

# Replace the {{ vars }}
sudo mv nginx.conf /etc/nginx/sites-enabled/lemmy.conf


To update to the newest version, run:

docker-compose up -d


First, you need to install Ansible on your local computer, eg using sudo apt install ansible, or the equivalent for you platform.

Then run the following commands on your local computer:

git clone
cd lemmy/ansible/
cp inventory.example inventory
nano inventory # enter your server, domain, contact email
ansible-playbook lemmy.yml --become


You'll need to have an existing Kubernetes cluster and storage class. Setting this up will vary depending on your provider. To try it locally, you can use MicroK8s or Minikube.

Once you have a working cluster, edit the environment variables and volume sizes in docker/k8s/*.yml. You may also want to change the service types to use LoadBalancers depending on where you're running your cluster (add type: LoadBalancer to ports), or NodePorts. By default they will use ClusterIPs, which will allow access only within the cluster. See the docs for more on networking in Kubernetes.

Important Running a database in Kubernetes will work, but is generally not recommended. If you're deploying on any of the common cloud providers, you should consider using their managed database service instead (RDS, Cloud SQL, Azure Databse, etc.).

Now you can deploy:

# Add `-n foo` if you want to deploy into a specific namespace `foo`;
# otherwise your resources will be created in the `default` namespace.
kubectl apply -f docker/k8s/db.yml
kubectl apply -f docker/k8s/pictshare.yml
kubectl apply -f docker/k8s/lemmy.yml

If you used a LoadBalancer, you should see it in your cloud provider's console.


Docker Development

git clone
cd lemmy/docker/dev
./ # This builds and runs it, updating for your changes

and goto http://localhost:8536

Local Development


Set up Postgres DB

 psql -c "create user lemmy with password 'password' superuser;" -U postgres
 psql -c 'create database lemmy with owner lemmy;' -U postgres
 export DATABASE_URL=postgres://lemmy:password@localhost:5432/lemmy


git clone
cd lemmy
# For live coding, where both the front and back end, automagically reload on any save, do:
# cd ui && yarn start
# cd server && cargo watch -x run



Lemmy is free, open-source software, meaning no advertising, monetizing, or venture capital, ever. Your donations directly support full-time development of the project.

  • Support on Patreon.
  • Sponsor List.
  • bitcoin: 1Hefs7miXS5ff5Ck5xvmjKjXf5242KzRtK
  • ethereum: 0x400c96c96acbC6E7B3B43B1dc1BB446540a88A01
  • monero: 41taVyY6e1xApqKyMVDRVxJ76sPkfZhALLTjRvVKpaAh2pBd4wv9RgYj1tSPrx8wc6iE1uWUfjtQdTmTy2FGMeChGVKPQuV


If you'd like to add translations, take a look a look at the english translation file.

  • Languages supported: English (en), Chinese (zh), Dutch (nl), Esperanto (eo), French (fr), Spanish (es), Swedish (sv), German (de), Russian (ru).


lang done missing
de 84% cross_posts,cross_post,users,number_of_communities,preview,upload_image,formatting_help,view_source,sticky,unsticky,settings,stickied,banned,creator,number_online,subscribed,expires,recent_comments,nsfw,show_nsfw,crypto,monero,joined,by,to,transfer_community,transfer_site,are_you_sure,yes,no
eo 92% number_of_communities,preview,upload_image,formatting_help,view_source,sticky,unsticky,stickied,banned,creator,number_online,are_you_sure,yes,no
es 99% creator,number_online
fr 97% view_source,sticky,unsticky,stickied,creator,number_online
nl 95% preview,upload_image,formatting_help,view_source,sticky,unsticky,stickied,banned,creator,number_online
ru 88% cross_posts,cross_post,number_of_communities,preview,upload_image,formatting_help,view_source,sticky,unsticky,stickied,banned,creator,number_online,recent_comments,monero,by,to,transfer_community,transfer_site,are_you_sure,yes,no
sv 95% preview,upload_image,formatting_help,view_source,sticky,unsticky,stickied,banned,creator,number_online
zh 86% cross_posts,cross_post,users,number_of_communities,preview,upload_image,formatting_help,view_source,sticky,unsticky,settings,stickied,banned,creator,number_online,recent_comments,nsfw,show_nsfw,monero,by,to,transfer_community,transfer_site,are_you_sure,yes,no


Logo made by Andy Cuccaro (@andycuccaro) under the CC-BY-SA 4.0 license