Self Hosted

Kimai

4,968844

Kimai is an open-source, multi-user time-tracking application, and a self-hosted alternative to Toggl and Harvest. Time is logged against a customer → project → activity hierarchy, with hourly or fixed rates, rounding rules, and budgets. It exports to CSV, PDF, and spreadsheet formats, generates invoices from templates, and has a plugin marketplace plus a REST API.

Zulip

25,87810,210

Zulip is an open-source team chat application, and a self-hosted alternative to Slack. Its distinguishing feature is topic-based threading: every message in a channel belongs to a named topic, so conversations stay separable and catch-up reading is fast even in busy channels. It offers full-text search, hundreds of integrations, interactive bots, and native mobile and desktop apps.

Vikunja

5,347678

Vikunja is an open-source task and project manager, and a self-hosted alternative to Todoist and Asana. The same tasks can be viewed as a list, table, kanban board, or Gantt chart, with subtasks, labels, reminders, recurring due dates, and saved filters. It runs as a single Go binary, exposes a REST API, syncs via CalDAV, and imports from Todoist, Trello, Asana, and Microsoft To Do.

BookStack

19,0362,422

BookStack is an open-source wiki and documentation platform, and a self-hosted alternative to Confluence. Content is organized into a deliberate three-level hierarchy — shelves hold books, books hold chapters and pages — which keeps large knowledge bases navigable. It ships WYSIWYG and Markdown editors, a diagrams.net integration, full-text search, page revisions, and SSO via SAML2, OIDC, and LDAP.

Baserow

5,846717

Baserow is an open-source no-code database, and a self-hosted alternative to Airtable. It presents tables as a familiar spreadsheet grid with grid, gallery, kanban, calendar, and form views, while exposing every table through an auto-generated REST API. The core is MIT-licensed and ships as a single Docker image; premium and enterprise tiers add SSO, audit logs, and row-level permissions.

Budibase

28,2702,207

Budibase is an open-source low-code platform for internal tools, and a self-hosted alternative to Retool. You connect an existing SQL database, REST API, or spreadsheet — or use its built-in database — then assemble screens, forms, and automations from prebuilt components. Apps are deployed from the same tool, either to Budibase's own runtime or via Docker and Kubernetes.

Jitsi Meet

29,8938,020

Jitsi Meet is an open-source video conferencing platform, and a self-hosted alternative to Zoom, Google Meet, and Microsoft Teams. Meetings run in the browser over WebRTC with no account or install for participants, and scale from peer-to-peer calls to large moderated rooms via the Jitsi Videobridge. The whole stack is self-hostable, so meeting media and metadata stay on your servers.

Paperless-ngx

44,9363,095

Paperless-ngx is an open-source document management system that turns scanned paper and PDFs into a searchable digital archive. It performs OCR on every document, extracts dates and correspondents, and applies tags and document types with trainable matching rules, so filing becomes automatic. It is the actively maintained, community-supported continuation of Paperless-ng.

Authentik

25,4061,994

Authentik is an open-source identity provider and single sign-on platform, and a self-hosted alternative to Okta, Auth0, and Microsoft Entra ID. It centralizes login for web apps, VPNs, and infrastructure through SAML, OAuth2/OpenID Connect, LDAP, RADIUS, and SCIM, with a flow engine that lets you compose enrollment, MFA, and recovery journeys visually. Run it for a homelab or scale it to a production cluster.

Gitea

57,8667,113

A painless, self-hosted all-in-one software-development service and a lightweight alternative to GitHub and GitLab. Gitea provides Git hosting, code review, issues and pull requests, a package registry, and built-in Actions-compatible CI/CD from a single Go binary that comfortably runs in under 512 MB of RAM.

Home Assistant

90,31038,534

An open-source home-automation platform that puts local control and privacy first, and a self-hostable alternative to SmartThings, Google Home, and Alexa routines. Home Assistant connects 3,000+ integrations, runs automations entirely on your own hardware, and offers customizable dashboards, a voice assistant, and energy monitoring.

Immich

113,6026,829

A high-performance, open-source photo and video management solution, and a self-hostable alternative to Google Photos and iCloud Photos. Immich offers automatic mobile backup, fast browsing of huge libraries, facial recognition, object and location search, albums, shared and external libraries, and multi-user support — all on your own server.

Vaultwarden

66,9813,192

A lightweight, open-source password-manager server written in Rust that is compatible with the official Bitwarden clients, and a self-hostable alternative to 1Password and LastPass. Vaultwarden runs the full feature set — vaults, organizations, Sends, attachments, TOTP, and passkeys — from a single container using around 10 MB of RAM.

listmonk

23,3002,587

An open-source, self-hosted newsletter and mailing-list manager, and an alternative to Mailchimp and Sendinblue. listmonk ships as a single Go binary with a modern dashboard, scales to millions of subscribers, and supports SQL-based segmentation, templating, multi-list campaigns, and delivery through any SMTP provider.

Nextcloud

36,7475,157

An open-source content-collaboration platform and a self-hostable alternative to Google Drive, Dropbox, and Microsoft 365. Nextcloud combines file sync and share with calendar, contacts, mail, video calls, and collaborative document editing, keeping every file on infrastructure you control.

AnythingLLM

29,9903,003

A comprehensive AI application that allows users to chat with documents, use AI agents, and create customizable multi-user environments with easy setup and configuration.

Open WebUI

55,3976,841

An extensible, self-hosted AI platform that supports offline operation, multiple LLM runners, and provides a user-friendly interface for AI interactions.

LibreChat

20,3363,415

An open-source AI chat platform that integrates multiple AI models, offering enhanced features and customization beyond traditional chatbots.

Lobe Chat

51,28711,081

An open-source, modern ChatGPT/LLMs UI framework that enables one-click deployment of private AI chat applications with multi-modal and extensible features.