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Open-Source Alternatives to Popular SaaS

Pick the product you’re paying for and we’ll show every open-source, self-hostable project that replaces it — each scored for how hard it is to self-host, with one-click deploy paths and an honest look at what you give up. 59 SaaS products covered.

Last updated Jun 15, 2026 · also browse the full self-hosted directory

Notes & Knowledge Base

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Notion alternatives
10 open-source options
Confluence alternatives
7 open-source options
Evernote alternatives
6 open-source options
Obsidian alternatives
6 open-source options

Databases & Spreadsheets

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Airtable alternatives
8 open-source options
Google Sheets alternatives
5 open-source options
Retool alternatives
4 open-source options
Smartsheet alternatives
3 open-source options

Automation & iPaaS

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Zapier alternatives
7 open-source options
Make alternatives
5 open-source options
Workato alternatives
4 open-source options
Tray.io alternatives
1 open-source option

CRM & Sales

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Salesforce alternatives
11 open-source options
HubSpot alternatives
10 open-source options
Pipedrive alternatives
8 open-source options

Product & Web Analytics

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Google Analytics alternatives
9 open-source options
Hotjar alternatives
4 open-source options
Mixpanel alternatives
4 open-source options
Amplitude alternatives
3 open-source options

Password Managers & Secrets

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1Password alternatives
6 open-source options
Dashlane alternatives
6 open-source options
LastPass alternatives
6 open-source options
HashiCorp Vault alternatives
3 open-source options

Email & Newsletters

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SendGrid alternatives
5 open-source options
Gmail / Google Workspace alternatives
4 open-source options
Mailchimp alternatives
4 open-source options
ConvertKit (Kit) alternatives
3 open-source options

Project Management & Kanban

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Trello alternatives
7 open-source options
Asana alternatives
6 open-source options
Jira alternatives
6 open-source options
Basecamp alternatives
3 open-source options
Linear alternatives
2 open-source options
monday.com alternatives
1 open-source option

File Storage & Sync

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Dropbox alternatives
13 open-source options
Google Drive alternatives
13 open-source options
Box alternatives
7 open-source options

Team Chat & Collaboration

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Slack alternatives
9 open-source options
Microsoft Teams alternatives
7 open-source options
Discord alternatives
1 open-source option

Forms & Surveys

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Google Forms alternatives
4 open-source options
Typeform alternatives
4 open-source options
Jotform alternatives
2 open-source options
SurveyMonkey alternatives
2 open-source options

Helpdesk & Support

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Freshdesk alternatives
6 open-source options
Zendesk alternatives
6 open-source options
Intercom alternatives
2 open-source options

BI & Dashboards

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Power BI alternatives
8 open-source options
Tableau alternatives
8 open-source options
Looker alternatives
7 open-source options

Monitoring & Status Pages

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Datadog alternatives
6 open-source options
Statuspage alternatives
5 open-source options
UptimeRobot alternatives
5 open-source options
Pingdom alternatives
4 open-source options

Scheduling & Booking

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Calendly alternatives
4 open-source options
Acuity Scheduling alternatives
2 open-source options

Self-Hosting Platforms & PaaS

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Heroku alternatives
10 open-source options
Render alternatives
10 open-source options
Netlify alternatives
5 open-source options
Vercel alternatives
2 open-source options

Frequently asked questions

Are these alternatives really free?

Yes — every project listed is open source, so the software itself is free to self-host. Some also offer an optional paid managed-hosting plan if you’d rather not run a server yourself.

How do I pick the right alternative?

Open any “X alternatives” page and sort the comparison table by self-host difficulty (easiest first), GitHub stars (most popular), or last updated (most active). Each option also shows an honest feature-gap vs the original SaaS.

Can I migrate my data from the SaaS?

Most mature open-source alternatives provide importers or support standard formats (CSV, Markdown, JSON). Check the individual project page and its docs; we note migration support where it exists.