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OpenSourceAlternatives

Collection

Self-hosted

Projects you can run entirely on your own infrastructure.

QuestDB

QuestDBOpen

Open-source time-series database for fast SQL analytics

Stars17.4K
Commitjust now
LicenseApache-2.0

QuestDB is an open-source time-series database that ingests millions of rows per second and queries them with extended SQL over open formats.

Alternative toInfluxDB
Turso

TursoOpen

SQLite-compatible edge database platform built on libSQL

Stars17.3K
Commitjust now
LicenseMIT

Turso is a SQLite-compatible database platform built on libSQL that replicates data to the edge for fast local reads, with embedded replicas, branching, and managed cloud hosting.

Alternative toNeon Postgres
Apache APISIX

Apache APISIXOpen

Open-source API gateway for routing, security, and AI traffic

Stars17.2K
Commitjust now
LicenseApache-2.0

Apache APISIX is a self-hosted, open-source API gateway that routes traffic to upstream services with authentication, rate limiting, and observability.

Alternative toOktaAuth0
Ceph

Ceph

Unified open-source object, block, and file storage for clusters

Stars17.1K
Commitjust now
LicenseLGPL-2.1

Ceph is a distributed storage system that serves object, block, and file storage from a single cluster built on commodity hardware.

LibreTranslate

LibreTranslate

Free and open-source machine translation API you can self-host.

Stars17K
Commitjust now
LicenseAGPL-3.0-only

LibreTranslate is a free, open-source machine translation API powered by Argos Translate that runs on your own server instead of a third-party cloud.

Alternative toTolgee
Docmost

DocmostOpen

Collaborative wiki with real-time editing and diagrams

Stars15.4K
Commit2d ago
LicenseAGPL-3.0

Docmost is a documentation workspace with real-time collaborative editing, nested spaces, and diagram support built in rather than embedded from elsewhere.

Alternative toNotion
Docs

DocsOpen

Self-hostable collaborative text editor with real-time co-editing

Stars16.9K
Commitjust now
LicenseMIT

Docs is a self-hostable collaborative text editor with real-time co-editing, sub-docs, and version history for team knowledge.

Alternative toOutlineNotion
Weaviate

WeaviateAIOpen

Open-source AI-native vector database for search and RAG

Stars16.9K
Commitjust now
LicenseBSD-3-Clause

Weaviate is an open-source vector database for AI search, combining vector, keyword, and hybrid retrieval with self-hosted Docker or managed cloud deployment.

Alternative toQdrant
Coder

CoderAIOpen

Self-hosted cloud development environments and governed AI coding agents

Stars16.8K
Commitjust now
LicenseAGPL-3.0

Coder is a self-hosted platform for running cloud development environments and AI coding agents on infrastructure you control.

Alternative toCursor
Trigger.dev

Trigger.devOpen

Open-source background jobs and durable AI workflows for TypeScript

Stars16.5K
Commitjust now
LicenseApache-2.0

Trigger.dev is an open-source platform for building durable AI agents and background workflows in TypeScript, with retries, queues, and observability.

Alternative toInngest
Flarum

FlarumOpen

Free, open-source forum software with a rich extension ecosystem

Stars16.4K
Commit4d ago
LicenseMIT

Flarum is a free, MIT-licensed forum platform you install on your own PHP server and shape with community-built extensions.

Alternative toDiscourse
SurfSense

SurfSenseAI

Air-gapped open-source NotebookLM alternative for private documents

Stars16.4K
Commitjust now
LicenseApache-2.0 AND BUSL-1.1

SurfSense is a free, open-source desktop AI agent that researches, edits, and transforms documents on your own machine, with no account and no uploads.

Alternative toOpen-Notebook
OpenProject

OpenProjectOpen

Open-source project management with Gantt charts and agile boards

Stars16.4K
Commitjust now
LicenseGPL-3.0

OpenProject is a GPL-licensed, open-source project management platform for classic, agile, or hybrid teams, with Gantt scheduling, boards, issue tracking, and time reporting.

Alternative toJira
Harper

HarperOpen

Free offline grammar checker that keeps writing on your device

Stars16.3K
Commitjust now
LicenseApache-2.0

Harper is a free, open-source grammar checker that runs entirely on your device, catching spelling and grammar mistakes across editors and browsers without sending text to a server.

Alternative toLanguageTool
Scalar

ScalarAIOpen

Open-source API client and docs generated from OpenAPI

Stars16.3K
Commitjust now
LicenseMIT

Scalar is an open-source API platform with an offline-first API client and interactive documentation rendered from the same OpenAPI document.

Alternative toPostman
BillionMail

BillionMailOpen

Run your own mail server and email marketing from one dashboard

Stars15.8K
Commit3mo ago
LicenseAGPL-3.0

BillionMail combines a mail server with newsletter and campaign tooling in one self-hosted package. One Docker Compose file brings up the web console plus mail transfer, mailbox, spam-filtering, database, and cache services, so a team can send and receive mail and run bulk campaigns from infrastructure it controls.

Alternative toMailchimp
Spree Commerce

Spree CommerceOpen

Self-hosted headless commerce with a REST API and Next.js storefront

Stars15.8K
Commitjust now
LicenseBSD-3-Clause

Spree Commerce is an open-source headless ecommerce platform with a REST API, TypeScript SDK, and Next.js storefront covering B2B, marketplace, and cross-border stores.

Alternative toShopify
Apache Answer

Apache AnswerOpen

Open-source Q&A software for community forums and help centers

Stars15.7K
Commitjust now
LicenseApache-2.0

Apache Answer is a self-hosted, open-source Q&A platform for running community forums, help centers, and team knowledge bases.

Alternative toConfluence
AITable

AITableAIOpen

Visual database that turns tables into collaborative apps and automations

Stars15.6K
Commitjust now
LicenseAGPL-3.0

AITable is a self-hosted visual database that pairs a spreadsheet interface with grid, gallery, kanban, calendar, and Gantt views plus a REST API.

Alternative toAirtable
Eigent

EigentAIOpen

Open-source AI cowork desktop with single-agent and multi-agent workforce modes

Stars15.5K
Commitjust now
LicenseApache-2.0

Eigent is an open-source desktop app where AI agents work beside you on research, writing, coding, and file tasks across macOS, Windows, and Linux.

Alternative toOpenHands
Shotcut

ShotcutOpen

Free open-source cross-platform video editor

Stars15.4K
Commitjust now
LicenseGPL-3.0

Shotcut is a free, open-source video editor for Windows, Mac, and Linux with native timeline editing, broad FFmpeg format support, and 4K output.

Alternative toKdenlive
PeerTube

PeerTubeOpen

Federated self-hosted video platform for independent ad-free channels

Stars15.4K
Commitjust now
LicenseAGPL-3.0

PeerTube is a free, open-source federated video platform for running an independent ad-free video site, with instances interconnecting into one network.

Alternative toMastodon
SuperTokens

SuperTokensOpen

Open-source user authentication with self-hosting and managed cloud

Stars15.3K
Commitjust now
LicenseApache-2.0

SuperTokens is open-source user authentication with session management, passwordless and social login, and SSO, available self-hosted or as a managed service.

Alternative toAuth0
Zitadel

ZitadelOpen

Open-source identity infrastructure with login and single sign-on

Stars15.3K
Commitjust now
LicenseAGPL-3.0

Zitadel is open-source identity infrastructure that adds login, single sign-on, and multi-factor authentication to applications, with multi-tenant organization management, available self-hosted or as a managed cloud.

Alternative toKeycloak