Self-hosted projects built with Amazon S3 API (S3-compatible)

Immich is an open-source platform for organizing, backing up, and streaming photos and videos with web and mobile clients, searchable metadata, face clustering, and S3-compatible storage.

AGPL-3.0Actively maintained

Alternative to:

Google Photos+14

Open-source, block-oriented personal knowledge manager with Markdown WYSIWYG, block-level two-way links, encrypted sync, Docker deployment and AI integrations.

AGPL-3.0Actively maintained

Alternative to:

SiYuan+18

SeaweedFS is a fast distributed storage system providing blob, file, and S3-compatible object storage with optional filer, replication, and erasure coding.

Apache-2.0Actively maintained

Alternative to:

Amazon S3+7

Open-source observability pipeline to collect, transform, and route logs and metrics with a single, high-performance binary and programmable transforms.

MPL-2.0Actively maintained

Alternative to:

Elastic Logstash+13

Community-developed Obsidian plugin to sync vaults via CouchDB or S3-compatible storage, with optional experimental WebRTC peer-to-peer syncing and end-to-end encryption.

MITActively maintained

Alternative to:

Obsidian

Open-source cloud-native search engine for observability data on object storage with an Elasticsearch/OpenSearch-compatible API.

Apache-2.0Actively maintained

Alternative to:

Splunk+5

Go-based, modular mail server implementing SMTP/LMTP/IMAP with built-in DKIM/SPF/DMARC, storage backends (SQLite/Postgres/S3), Prometheus metrics and Docker support.

GPL-3.0Actively maintained

Alternative to:

Microsoft Exchange Online+10

GLAuth is a lightweight LDAP/LDAPS authentication server for development, CI, and homelabs, supporting file, S3, SQL, or LDAP proxy backends and optional 2FA.

MITActively maintained

Alternative to:

Microsoft Active Directory+5

Chibisafe is a fast, self-hosted file uploader and vault for files, photos, and documents with shareable links, albums, tagging, and API access.

MITActively maintained

Alternative to:

WeTransfer+16

Open-source, production-ready OCI-native container image and artifact registry with single-binary deployment, S3/local storage, web UI and CLI.

Apache-2.0Actively maintained

Alternative to:

Docker Hub+3

Palmr. is an open-source file-sharing platform for uploading, organizing, and securely sharing files with custom links, passwords, and access control.

Apache-2.0Actively maintained

Alternative to:

WeTransfer+11

Lightweight open-source feature flag system with a relay proxy, OpenFeature support, file/cloud retrievers, and exporters for usage data.

MITActively maintained

Alternative to:

Unleash+4

Self-hostable note-taking and knowledge base app with an extended Markdown editor, fast search, tagging, workspaces, sharing permissions, exports, and offline PWA support.

MITActively maintained

Alternative to:

Notion+19

Ech0 is a lightweight open-source, self-hosted federated publishing platform (ActivityPub) with a Vue-based UI, SQLite storage, Docker deployment and built-in Markdown editor.

AGPL-3.0Actively maintained

Alternative to:

Micro.blog+13

Open-source self-hosted image sharing app with multi-format uploads, nested tags, deduplication, ShareX support, and Docker deployment.

AGPL-3.0Actively maintained

Alternative to:

Imgur+13

Open-source, self-hostable file transfer service with resumable uploads, S3 or disk storage, transfer requests, and end-to-end encrypted WebRTC quick transfers.

AGPL-3.0Slowing down

Alternative to:

WeTransfer+9

Sharry is a self-hosted file sharing web app with resumable uploads (tus), configurable lifetimes and passwords, and multiple storage backends including PostgreSQL, MariaDB, H2, filesystem or S3-compatible storage.

GPL-3.0Actively maintained

Alternative to:

WeTransfer+19

Lightweight PHP file manager with ShareX support, multi-user UI, and multiple backends (local, S3, Google Cloud, Azure, Dropbox, FTP).

Apache-2.0Actively maintained

Alternative to:

Dropbox+11

Open-source PHP-based image and video hosting platform for building Imgur/Flickr-style sites with S3/external storage, Docker support, multi-user accounts and admin tools.

AGPL-3.0Actively maintained

Alternative to:

Imgur+8

Fully-replicated DNS, DHCP and TFTP server with ad‑blocking, web UI, API, Prometheus metrics and multi-site replication for small to medium networks.

GPL-3.0Actively maintained

Alternative to:

Cisco OpenDNS (Umbrella)+10

Self-hostable pastebin focused on privacy, with browser-side end-to-end encryption, paste history, expiring pastes, and file drag-and-drop.

AGPL-3.0Actively maintained

Alternative to:

Pastebin+5

Omeka is a PHP-based open-source web publishing platform for managing, preserving and presenting metadata-rich digital collections and media-rich online exhibits.

GPL-3.0Actively maintained

Alternative to:

Omeka.net+11

Self-hosted database backup manager with scheduling, S3-compatible storage, multi-database support, diff viewer and restore capabilities.

MITActively maintained

Alternative to:

Veeam Backup & Replication+9

Feedback management and public roadmap platform for collecting, prioritizing and sharing customer requests; supports Docker, Helm/Kubernetes and multiple storage backends.

Apache-2.0Actively maintained

Alternative to:

Canny+6

Digital signage CMS with web and device players to manage content, schedules, and displays; built with TypeScript, React, PostgreSQL, Redis and S3-compatible storage.

MITSlowing down

Alternative to:

ScreenCloud+9

A high-performance, URL-based image transformation service written in Go, enabling on-the-fly resizing, format changes, and CDN-friendly delivery.

MITSlowing down

Alternative to:

Mapbox+1

Self-hosted HTTP API to render web pages to PNG with configurable viewport, caching, Playwright-based parallel rendering, and S3/CouchDB/filesystem storage.

MITActively maintained

Alternative to:

Urlbox+4

Self-hosted image gallery and live editing app with virtual scrolling, non-destructive edits, instant URL-based transforms, S3/local storage support, and mobile-optimized UI.

AGPL-3.0Actively maintained

Alternative to:

Google Photos+19

Open-source PHP and MySQL CMS focused on developer control, template-driven sites, modular content types, and an intuitive admin/editor experience.

Actively maintained

Alternative to:

WordPress.com+12

Community-focused server for private photo/video backup, albums, chat and audio/video calls with mobile app support and S3-compatible storage.

MITActively maintained

Alternative to:

Google Photos+10