Open source alternatives

List of open-source alternatives to everyday SaaS products.

Artificial intelligence chatbot/ LLM (ChatGPT alternatives):

AI code completion (Github CoPilot alternatives):

Team knowledge base (Notion alternatives):

Internal tools (Retool alternatives):

Web analytics (Google Analytics alternatives):

Note-taking/ Knowledge management (Evernote alternatives):

Company blogs/ newsletters (WordPress alternatives):

Blogging platform/ Personal website builder (Medium alternatives):

Newsletters (ConvertKit alternatives):

Static website generator:

Website builder (Wix, Strikingly, Webflow alternatives):

Icons (Noun Project alternatives):

Collaborative design tool (Figma alternatives):

Online forms (Typeform alternatives):

Session replay and analytics (Fullstory alternatives):

Content Management System/ CMS (Contentful alternatives):

Log management (Papertrail alternatives):

To-do app:

Community management:

Kanban board (Trello alternatives):

Social network/ Micro-blogging (Twitter alternatives):

Ticket management (Zendesk, Freshdesk alternatives):

Scheduling tool (Calendly alternatives):

Smart spreadsheet (Airtable alternatives):

Team communication (Slack, Discord alternatives):

Live chat (Intercom alternatives):

User authentication (Auth0 alternatives):

Digital search experience (Algolia alternatives):

Backend-as-a-Service (Firebase alternatives):

Customer data platform/ CDP (Segment alternatives):

Link shortener (Bitly alternatives):

Online store builder (Shopify alternatives):

Password manager (1Password alternatives):

Email delivery (Mailgun, SendGrid alternatives):

Usage-based billing (Stripe, Chargebee alternatives):

File uploader:

Notification infrastructure:

API development (Postman alternatives):

Programmatic videos:

Data warehouse (Snowflake alternatives):

Annotation:

Feature management/ Feature flag:

Product analytics (Mixpanel, Amptitude alternatives):

Video conferencing (Google Meet, Skype alternatives):

Personal cloud (Dropbox alternatives):

Business intelligence (Tableau, Looker, Power BI alternatives):

Platform-as-a-Service/ PaaS (Heroku, Netlify, Vercel alternatives):

Unified Communication Platform & Telephony API (Twilio alternatives):

Bug tracking/ Error tracking (Sentry alternatives):

Invoicing:

Graph database:

Vector database:

Time-series database:

Document signing (DocuSign alternatives):

Workflow automation (Zapier alternatives):

Project Management (Asana, JIRA alternatives):

Time Tracking (Toggl, Clockify alternatives)

Personal finance (Empower Personal Wealth alternatives):

CRM (Salesforce, Hubspot alternatives):

Integration Platform (Tray.io, Merge.dev alternatives)

Online Survey Platform (SurveyMonkey, Qualtrics alternatives)

Criteria

1. Product is open-source and repo is actively being maintained.
2. It is a product (not a library) and ideally has a popular closed-source alternative.
3. Repo has at least 100 stars on GitHub.

Contributing

Looking for contributors to add missing startups/ projects. Please submit a PR (the products are listed in descending order by number of GitHub stars) or feel free to DM @deeptivchopra.