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Mapping 20 SaaS giants to 30 open-source alternatives

Discover Open Source Replacements for Proprietary 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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Trusted by 12K+ people

Supported by these incredible partners

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Popular Open Source Projects

High-quality, community-driven, and self-hostable replacements.

A

AppFlowy

Workspace & Notes

The ultimate open-source alternative to Notion. You are in charge of your data and customizations.

Key Features

100% data control, Offline mode, Built with Flutter & Rust

Alternative to
Notion
Pricing
Free / Open Source
O

Outline

Workspace & Notes

A fast, collaborative, knowledge base for your team built on React and Node.js.

Key Features

Markdown support, Team collaboration, API access

Alternative to
Notion
Pricing
Self-hosted Free / Cloud Paid
L

Listmonk

Email Marketing

High performance, self-hosted newsletter and mailing list manager with a modern dashboard.

Key Features

Fast multi-threaded sender, Rich analytics, Templating engine

Alternative to
Mailchimp
Pricing
Free / Open Source
E

ErpNext

CRM

100% Open Source ERP. Everything you need to manage your business.

Key Features

Accounting, HR & Payroll, Manufacturing

Alternative to
Salesforce
Pricing
Free / Open Source
M

Mattermost

Team Communication

Open-source, self-hostable Slack alternative designed for privacy-conscious enterprises.

Key Features

Enterprise-grade security, Custom integrations, File sharing

Alternative to
Slack
Pricing
Free / Enterprise Paid
Z

Zulip

Team Communication

An open-source team chat app with an organized threading model.

Key Features

Topic-based threading, Markdown support, Read receipts

Alternative to
Slack
Pricing
Free / Cloud Paid
N

NocoDB

Databases & Spreadsheets

The Open Source Airtable alternative. Turns any MySQL, PostgreSQL, SQL Server, SQLite & MariaDB into a smart spreadsheet.

Key Features

Connects to existing databases, Grid/Gallery/Kanban views, Webhooks & APIs

Alternative to
Airtable
Pricing
Free / Open Source
B

Baserow

Databases & Spreadsheets

Open source no-code database tool and Airtable alternative.

Key Features

Real-time collaboration, Custom plugins, REST API

Alternative to
Airtable
Pricing
Free / Premium Paid
C

Cal.com

Scheduling

The open-source Calendly alternative. You are in control of your events and data.

Key Features

Webhooks & API, Custom domain, Routing forms

Alternative to
Calendly
Pricing
Free / Cloud Paid
n

n8n

Automation

Free and open node-based workflow automation tool.

Key Features

Visual node editor, Custom HTTP requests, Hundreds of integrations

Alternative to
Zapier
Pricing
Fair-code / Cloud Paid
M

Medusa

E-Commerce

The open-source Shopify alternative. An API-first commerce engine.

Key Features

Headless architecture, Multi-region support, Custom promotions

Alternative to
Shopify
Pricing
Free / Open Source
W

WooCommerce

E-Commerce

The most customizable eCommerce platform for building your online business.

Key Features

WordPress integration, Thousands of plugins, Digital & physical goods

Alternative to
Shopify
Pricing
Free / Open Source
P

Plausible

Analytics

Simple and privacy-friendly Google Analytics alternative. No cookie banners required.

Key Features

< 1KB script, 100% data ownership, GDPR/CCPA compliant

Alternative to
Google Analytics
Pricing
Self-hosted Free / Cloud Paid
U

Umami

Analytics

A simple, fast, privacy-focused alternative to Google Analytics.

Key Features

Unlimited websites, Event tracking, Real-time data

Alternative to
Google Analytics
Pricing
Free / Open Source
C

Coolify

Hosting & DevOps

An open-source, self-hostable Heroku / Netlify / Vercel alternative.

Key Features

Deploy any app (Node, Python, PHP, etc), Database provisioning, Automatic SSL

Alternative to
Vercel
Pricing
Free / Open Source
P

Plane

Project Management

The open-source software development tool to manage issues, sprints, and product roadmaps with peace of mind.

Key Features

Issue tracking, Cycles (Sprints), Modules

Alternative to
Linear
Pricing
Free / Open Source
D

Documenso

E-Signatures

The Open Source DocuSign Alternative. We want to earn your trust by letting you self-host.

Key Features

Unlimited documents, Custom branding, API access

Alternative to
DocuSign
Pricing
Free / Open Source
F

Formbricks

Forms & Surveys

Open-source Qualtrics & Typeform alternative. Build in-product micro-surveys for free.

Key Features

In-app surveys, Link surveys, Templates

Alternative to
Typeform
Pricing
Free / Open Source
O

OhMyForm

Forms & Surveys

Free open source alternative to TypeForm, TellForm, or Google Forms.

Key Features

Form builder, Data export, Customizable themes

Alternative to
Typeform
Pricing
Free / Open Source
M

Meilisearch

Search

Lightning-fast, open-source search engine that fits effortlessly into your apps, websites, and workflow.

Key Features

Typo-tolerance, Faceted search, Synonyms

Alternative to
Algolia
Pricing
Free / Open Source
T

Typesense

Search

Fast, typo-tolerant, open-source search engine optimized for instant sub-50ms searches.

Key Features

In-memory performance, Geosearch, Vector search

Alternative to
Algolia
Pricing
Free / Open Source
S

Supabase

Backend-as-a-Service

The open source Firebase alternative. Build in a weekend. Scale to millions.

Key Features

Postgres database, Authentication, Edge Functions

Alternative to
Firebase
Pricing
Free / Cloud Paid
A

Appwrite

Backend-as-a-Service

Secure Open-Source Backend Server for Web, Mobile & Flutter Developers.

Key Features

Databases, Auth, Storage

Alternative to
Firebase
Pricing
Free / Cloud Paid
H

Hoppscotch

API Development

Open source API development ecosystem. A fast, beautiful Postman alternative.

Key Features

REST & GraphQL, WebSockets, Environments

Alternative to
Postman
Pricing
Free / Open Source
B

Bruno

API Development

Fast and git-friendly opensource API client, aimed at revolutionizing the status quo represented by Postman.

Key Features

Stores collections as plain text in Git, No cloud sync forced, Scripting support

Alternative to
Postman
Pricing
Free / Open Source
J

Jitsi Meet

Video Conferencing

More secure, more flexible, and completely free video conferencing.

Key Features

No account needed, Screen sharing, End-to-end encryption

Alternative to
Zoom
Pricing
Free / Open Source
A

Apache Spark

Data Engineering

Unified engine for large-scale data analytics.

Key Features

Batch processing, Streaming, Machine Learning

Alternative to
Databricks
Pricing
Free / Open Source
G

GlitchTip

Error Tracking

An open-source error tracking tool. Compatible with Sentry SDKs.

Key Features

Error tracking, Uptime monitoring, Sentry SDK compatibility

Alternative to
Sentry
Pricing
Free / Open Source
S

SuperTokens

Authentication

Open source alternative to Auth0 / Firebase Auth / AWS Cognito.

Key Features

Session management, Social login, Passwordless

Alternative to
Auth0
Pricing
Free / Cloud Paid
K

Keycloak

Authentication

Open Source Identity and Access Management.

Key Features

Single-Sign On, Identity Brokering, User Federation

Alternative to
Auth0
Pricing
Free / Open Source

People are looking for alternatives to...

Discover open-source replacements for proprietary SaaS and commercial tools.

N

Notion

Workspace & Notes

Replace proprietary and expensive Notion with free, open-source alternatives.

SaaS Alternatives

Replaced by AppFlowy, Outline.

Available alternatives
2 tools
Privacy focus
Self-host
M

Mailchimp

Email Marketing

Replace proprietary and expensive Mailchimp with free, open-source alternatives.

SaaS Alternatives

Replaced by Listmonk.

Available alternatives
1 tools
Privacy focus
Self-host
S

Salesforce

CRM

Replace proprietary and expensive Salesforce with free, open-source alternatives.

SaaS Alternatives

Replaced by ErpNext.

Available alternatives
1 tools
Privacy focus
Self-host
S

Slack

Team Communication

Replace proprietary and expensive Slack with free, open-source alternatives.

SaaS Alternatives

Replaced by Mattermost, Zulip.

Available alternatives
2 tools
Privacy focus
Self-host
A

Airtable

Databases & Spreadsheets

Replace proprietary and expensive Airtable with free, open-source alternatives.

SaaS Alternatives

Replaced by NocoDB, Baserow.

Available alternatives
2 tools
Privacy focus
Self-host
C

Calendly

Scheduling

Replace proprietary and expensive Calendly with free, open-source alternatives.

SaaS Alternatives

Replaced by Cal.com.

Available alternatives
1 tools
Privacy focus
Self-host
Z

Zapier

Automation

Replace proprietary and expensive Zapier with free, open-source alternatives.

SaaS Alternatives

Replaced by n8n.

Available alternatives
1 tools
Privacy focus
Self-host
S

Shopify

E-Commerce

Replace proprietary and expensive Shopify with free, open-source alternatives.

SaaS Alternatives

Replaced by Medusa, WooCommerce.

Available alternatives
2 tools
Privacy focus
Self-host
G

Google Analytics

Analytics

Replace proprietary and expensive Google Analytics with free, open-source alternatives.

SaaS Alternatives

Replaced by Plausible, Umami.

Available alternatives
2 tools
Privacy focus
Self-host
V

Vercel

Hosting & DevOps

Replace proprietary and expensive Vercel with free, open-source alternatives.

SaaS Alternatives

Replaced by Coolify.

Available alternatives
1 tools
Privacy focus
Self-host
L

Linear

Project Management

Replace proprietary and expensive Linear with free, open-source alternatives.

SaaS Alternatives

Replaced by Plane.

Available alternatives
1 tools
Privacy focus
Self-host
D

DocuSign

E-Signatures

Replace proprietary and expensive DocuSign with free, open-source alternatives.

SaaS Alternatives

Replaced by Documenso.

Available alternatives
1 tools
Privacy focus
Self-host
T

Typeform

Forms & Surveys

Replace proprietary and expensive Typeform with free, open-source alternatives.

SaaS Alternatives

Replaced by Formbricks, OhMyForm.

Available alternatives
2 tools
Privacy focus
Self-host
A

Algolia

Search

Replace proprietary and expensive Algolia with free, open-source alternatives.

SaaS Alternatives

Replaced by Meilisearch, Typesense.

Available alternatives
2 tools
Privacy focus
Self-host
F

Firebase

Backend-as-a-Service

Replace proprietary and expensive Firebase with free, open-source alternatives.

SaaS Alternatives

Replaced by Supabase, Appwrite.

Available alternatives
2 tools
Privacy focus
Self-host
P

Postman

API Development

Replace proprietary and expensive Postman with free, open-source alternatives.

SaaS Alternatives

Replaced by Hoppscotch, Bruno.

Available alternatives
2 tools
Privacy focus
Self-host
Z

Zoom

Video Conferencing

Replace proprietary and expensive Zoom with free, open-source alternatives.

SaaS Alternatives

Replaced by Jitsi Meet.

Available alternatives
1 tools
Privacy focus
Self-host
D

Databricks

Data Engineering

Replace proprietary and expensive Databricks with free, open-source alternatives.

SaaS Alternatives

Replaced by Apache Spark.

Available alternatives
1 tools
Privacy focus
Self-host
S

Sentry

Error Tracking

Replace proprietary and expensive Sentry with free, open-source alternatives.

SaaS Alternatives

Replaced by GlitchTip.

Available alternatives
1 tools
Privacy focus
Self-host
A

Auth0

Authentication

Replace proprietary and expensive Auth0 with free, open-source alternatives.

SaaS Alternatives

Replaced by SuperTokens, Keycloak.

Available alternatives
2 tools
Privacy focus
Self-host