Open Source Alternatives to Popular Software
Over 1 million users replaced their proprietary tools with open source software. Discover the best alternatives and join the movement.
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Monitors websites and APIs, pages on-call, and publishes a status page
Stars
55Last commit
8 hours agoLicense
AGPL-3.0
Hosted uptime monitoring with multi-region checks, eight monitor types, on-call rotations, escalation policies, and public status pages for SaaS teams and agencies.
Open Source Alternative to:
Build complex automations without code, deploy anywhere with full control
Stars
56Last commit
29 days agoLicense
MIT
Open-source no-code automation platform for logistics, chatbots, and AI agents. Deploy on cloud, self-host, or hybrid with complete data sovereignty and modular workflow design.
Open Source Alternative to:
Self-hostable project management for tasks, events and docs
Stars
71Last commit
3 months agoLicense
AGPL-3.0
Project management app with task lists, calendar, files, docs and full-text search. Self-host it on your own infrastructure with team roles and permissions.
Open Source Alternative to:
Record screen and face, cut pauses, export 4K free
Stars
54Last commit
7 hours agoLicense
AGPL-3.0
Mac app that records your screen and camera together, auto-detects pauses for one-click cutting, and exports in 4K with no watermark or account required.
Open Source Alternative to:
Turn short shortcuts into your everyday words
Stars
52Last commit
5 days agoLicense
AGPL-3.0
Text expander that replaces typed abbreviations with saved replies, signatures, and snippets across macOS, Windows, and Linux.
Open Source Alternative to:
Self-hosted sticky notes with better organization
Stars
46Last commit
14 days agoLicense
MIT
A self-hosted, open-source note-taking app that keeps the Google Keep sticky-note feel while adding folders, timelines, list views, and import support.
Open Source Alternative to:
Invisible bot protection that respects user privacy
Stars
37Last commit
2 days agoLicense
MPL-2.0
Privacy-compliant CAPTCHA alternative using proof-of-work technology. Protects websites from bots and spam without user interaction or data tracking.
Open Source Alternative to:
Streamline investor relations and fundraising management
Stars
61Last commit
8 months agoLicense
AGPL-3.0
Open source platform for managing investor updates, KPIs, fundraising pipeline and data rooms. Keep stakeholders informed and organized.
Open Source Alternative to:
AI-powered root cause analysis for on-call alerts, self-hosted and air-gapped
Stars
42Last commit
2 months agoLicense
Apache-2.0
Receive alerts from Grafana, Datadog, and Prometheus with AI-generated root cause analysis. Self-hosted on Kubernetes, fully air-gapped capable, Apache 2.0 licensed.
Open Source Alternative to:
Secure, encrypted forms with advanced features
Stars
49Last commit
12 days agoLicense
AGPL-3.0
Build end-to-end encrypted forms with enterprise-grade features, no coding required. Protect sensitive data and enhance user trust.
Open Source Alternative to:
Turn user feedback into features that matter
Stars
41Last commit
1 day agoLicense
SSPL-1.0
Collect feedback, prioritize with AI-powered voting, and share transparent roadmaps. Build products users love with automated triage and seamless integration.
Open Source Alternative to:
Local-first workspace that runs AI agents on your documents
Stars
40Last commit
7 hours agoLicense
MPL-2.0
Write, organize, and run AI agents in a private workspace that stores everything locally, syncs peer-to-peer, and works offline on Windows, macOS, and Linux.
Open Source Alternative to:
Privacy-focused note-taking made simple and fast
Stars
67Last commit
9 months agoLicense
GPL-2.0
Justnote is a secure note-taking app that lets you easily create and sync notes across devices while maintaining full control of your data.
Open Source Alternative to:
Event ticketing with no per-ticket platform fees
Stars
37Last commit
5 hours agoLicense
AGPL-3.0
Sell tickets for £50/year with payments, QR check-in, refunds, reporting, and a hosted booking site. Self-hostable under AGPL-3.0.
Open Source Alternative to:
Privacy-first newsletter platform without tracking
Stars
35Last commit
18 days agoLicense
AGPL-3.0
Create and send newsletters with complete privacy protection. No tracking, no data collection - just simple, clean email delivery with customizable templates and archive sites.
Open Source Alternative to:
AI-powered task management with radical focus
Stars
25Last commit
10 days agoLicense
AGPL-3.0
Open source minimalist task management tool with AI companion that filters noise, automates coordination, and guides teams through complexity with calm focus.
Open Source Alternative to:
Bridge internal workflows with public collaboration
Stars
31Last commit
21 hours agoLicense
Unknown
Source-available project management platform with dual views - internal team workspace and public portal for user feedback, voting, and progress tracking.
Open Source Alternative to:
Self-hosted DAM with fast search and asset workflows
Stars
26Last commit
14 hours agoLicense
MIT
Self-hostable digital asset management platform with Elasticsearch-powered search, AI-assisted indexing, granular permissions, and API-first architecture for teams of any size.
Open Source Alternative to:
Blogging platform with built-in SEO, themes, and APIs
Stars
25Last commit
12 hours agoLicense
AGPL-3.0
Self-hostable blogging platform with a clean editor, zero-config SEO, custom themes, real-time collaboration, and built-in comments and newsletters.
Open Source Alternative to:
Access control for AI agents your customers log in with
Stars
23Last commit
10 days agoLicense
BUSL-1.1
Detects AI agents using customer credentials, masks private fields, holds risky actions for passkey approval, and signs every decision on your own server.
Open Source Alternative to:
No-code platform to build AI agents and automate support
Stars
17Last commit
6 hours agoLicense
MIT
Build AI chatbots, automate customer support workflows, and connect live agents across web, WhatsApp, email, and voice with a no-code visual designer.
Open Source Alternative to:
LLM observability: cost, latency, and traces in one place
Stars
13Last commit
5 days agoLicense
MIT
Drop-in observability platform for OpenAI, Anthropic, and Gemini that logs every request, tracks costs, traces agent workflows, and flags anomalies and PII.
Open Source Alternative to:
Complete website health monitoring and security scanning
Stars
16Last commit
6 months agoLicense
Unknown
Monitor website uptime, detect security vulnerabilities, find broken links, and simulate user flows. Get instant alerts when issues arise. Free tier available.
Open Source Alternative to:
Ask once, get answers across every document
Stars
13Last commit
17 days agoLicense
AGPL-3.0
Upload files, ask questions, and get AI‑backed answers with citations. Compare, synthesize, and export results for teams and polished outputs.
Open Source Alternative to:
Automatically discover hidden subscriptions from your inbox
Stars
11Last commit
3 days agoLicense
AGPL-3.0
Free subscription tracker that automatically scans your email to find recurring charges. Privacy-focused discovery with complete spending overview and management tools.
Open Source Alternative to:
Trace, evaluate, and protect every LLM call in one SDK
Stars
12Last commit
4 days agoLicense
AGPL-3.0
An AI gateway that sits on the request path to handle PII redaction, prompt injection blocking, tracing, evals, and cost tracking for OpenAI, Anthropic, and Gemini.
Open Source Alternative to:
Secure AI API management for iOS apps with DeviceCheck
Stars
9Last commit
1 month agoLicense
AGPL-3.0
A secure proxy service that protects AI API keys using Apple DeviceCheck, enabling safe integration of ChatGPT, Claude, and other AI models in iOS apps
Own your hiring data with unlimited seats forever
Stars
0Last commit
3 months agoLicense
AGPL-3.0
Self-hosted open-source ATS with no per-seat pricing. Full data ownership, modern tech stack, and complete control over your recruitment process.
Open Source Alternative to:
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Sent – Messaging Infrastructure for Developers. One API for SMS, WhatsApp, and RCS across 190+ countries.
Sent
Sent
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