Finde die besten Open-Source-Alternativen zu beliebter Software.

BestAlternative hilft dir, selbst gehostete, datenschutzfreundliche, kostenlose und local-first Ersatzlösungen für kostenpflichtige Software zu finden, die wichtigsten Abwägungen zu vergleichen und einen praktikablen Migrationspfad zu planen.

best-notion-alternatives-2026-affine-appflowy-anytype-comparison
Alle Alternativen anzeigen
Docuseal logo

Docuseal

DocuSeal is an open source e-signature platform that provides fast, easy document signing with developer-friendly API integration.

17,288
AGPL-3.0

Alternative zu: DocuSign

Audacity logo

Audacity

Free, open-source audio editor and recorder for all platforms. Record, edit, mix and enhance audio with professional tools. Perfect for music, podcasts, and more.

17,241
Other

Alternative zu: Adobe Audition

QuestDB logo

QuestDB

Open-source time-series database offering massive ingestion throughput, millisecond queries, and SQL extensions, designed for optimal performance at any hardware scale.

17,130
Apache-2.0

Alternative zu: MongoDB

Windmill logo

Windmill

Powerful, self-hosted platform for building and running workflows, scripts, and apps with code-first approach and collaborative features.

16,902
Other

Alternative zu: Make

Turso logo

Turso

Turso provides a simple developer experience with SQLite compatibility, allowing you to build and scale multi-tenant applications with unlimited databases.

16,897
MIT

Alternative zu: Supabase

Ceph logo

Ceph

Ceph provides unified object, block, and file storage from a single cluster built on commodity hardware.

16,739
Other

Alternative zu: Amazon S3

Postal logo

Postal

Self-hosted email delivery platform with powerful features for transactional and bulk emails, offering full control and customization.

16,619
MIT

Alternative zu: Resend

Docs logo

Docs

Transform document collaboration with real-time editing, version control, and secure sharing features that enhance team productivity and communication.

16,608
MIT

Alternative zu: Notion

Bolt.new logo

Bolt.new

bolt.new is a platform that enables developers to quickly create, modify, and deploy full-stack web applications using various popular frameworks and technologies.

16,427
MIT

Alternative zu: Lovable

Weaviate logo

Weaviate

Open-source vector database designed for building powerful, production-ready AI applications with hybrid search capabilities and flexible deployment options.

16,420
BSD-3-Clause

Alternative zu: Supabase

Flarum logo

Flarum

Lightweight, extensible forum platform with a sleek interface, powerful moderation tools, and seamless integration capabilities.

16,331
MIT

Alternative zu: Skool

OpenWork logo

OpenWork

Desktop app supporting 50+ LLMs with custom keys, team sharing, and browser automation. Build reusable AI agents with built-in guardrails for enterprise use.

16,315
MIT

Alternative zu: Claude Cowork

Maxun logo

Maxun

Train robots in 2 minutes to scrape web data automatically. No coding required. Handles pagination, CAPTCHAs, and layout changes with AI.

15,989
AGPL-3.0

Alternative zu: Octoparse

Spree Commerce logo

Spree Commerce

Headless eCommerce platform with REST API, TypeScript SDK, and Next.js storefront. Handle B2B, multi-vendor marketplaces, and cross-border commerce. Self-hosted, open source, zero fees.

15,505
BSD-3-Clause

Alternative zu: Shopify

Apache Answer logo

Apache Answer

A versatile, community-driven Q&A platform that fosters collaboration and knowledge exchange within organizations and communities.

15,486
Apache-2.0

Alternative zu: Skool

Plandex logo

Plandex

Terminal-based AI coding assistant with 2M token context window, diff review sandbox, and smart context management for building production-ready software.

15,474
MIT

Alternative zu: Claude Code

Trigger logo

Trigger

A developer-friendly platform for building, scheduling, and managing background jobs in your applications with minimal setup.

15,458
Apache-2.0

Alternative zu: Make

OpenProject logo

OpenProject

Powerful classic, agile or hybrid project management software with a focus on data privacy and security

15,395
GPL-3.0

Alternative zu: Jira

AITable logo

AITable

AITable.ai offers a visual database platform that simplifies workflow automation and connects to over 6,000 apps through integrations like Zapier and Make.

15,390
AGPL-3.0

Alternative zu: Airtable

Scalar logo

Scalar

Scalar is an open-source tool for building, customizing, and hosting interactive API documentation with OpenAPI support.

15,340
MIT

Alternative zu: Mintlify

SuperTokens logo

SuperTokens

Open-source authentication solution offering flexible, self-hosted user management with advanced features and easy integration.

15,120
Other

Alternative zu: Clerk

Cachet logo

Cachet

Open-source status page platform that helps organizations communicate system status and incidents effectively with customizable components and metrics tracking

15,105
Other

Alternative zu: UptimeRobot

Seafile logo

Seafile

Open source file sync and sharing platform with custom properties, AI automation, collaborative editing, and enterprise-grade security for teams.

14,888
Other

Alternative zu: Google Drive

Logstash logo

Logstash

Logstash is a free and open server-side data processing pipeline that ingests data from multiple sources, transforms it, and sends it to your desired destination.

14,885
Other

Alternative zu: DataDog

Botpress logo

Botpress

A comprehensive platform for creating AI agents with intuitive tools, extensive integrations, and enterprise-grade features powered by the latest language models.

14,759
MIT

Alternative zu: Voiceflow

PeerTube logo

PeerTube

Create your own video hosting platform with PeerTube - a free, open-source alternative to YouTube. Join 600,000+ videos across 1,000+ interconnected platforms without ads or tracking.

14,660
AGPL-3.0

Alternative zu: YouTube

Billion Mail logo

Billion Mail

Self-hosted email marketing platform with unlimited sending, AI-powered email creation, real-time analytics, and no monthly fees. Complete SMTP solution.

14,615
AGPL-3.0

Alternative zu: Resend

LanguageTool logo

LanguageTool

Check grammar, punctuation, and spelling errors instantly with AI-powered technology. Supports 30+ languages with browser extensions and desktop apps.

14,601
LGPL-2.1

Alternative zu: Grammarly

Midday logo

Midday

All-in-one tool for freelancers and small businesses to manage finances, track time, store files, and send invoices efficiently.

14,521
AGPL-3.0

Alternative zu: YNAB

Organic Maps logo

Organic Maps

Free, open-source offline maps app with detailed trails, turn-by-turn navigation, and zero tracking. Perfect for hikers, cyclists, and travelers seeking privacy.

14,393
Other

Alternative zu: Google Maps