Open source alternatives · Official downloads

Replace paid software with open source that does the job

Tell us what you pay for. We'll show free, open source alternatives — compared side by side, with official downloads checked by hand.

Google Analytics Zapier Slack Gmail Pocket Calendly
Official releases only SHA-256 on every file No installers, no bundled software

Fresh releases this week

46 programs released an update · 414 total

RSSHub MIT Feed Readers v2026.11.05-8591.17b1822 ★ 46,837 Solidus BSD-3-Clause E-commerce vsolidus_admin/v0.5.1 ★ 5,347 Spree Commerce BSD-3-Clause E-commerce v6.0.3 ★ 15,811 Typemill MIT Content Management Systems (CMS) v2.28.2 ★ 620 Umbraco MIT Content Management Systems (CMS) vrelease-18.3.1 ★ 5,280 Stirling-PDF logo Stirling-PDF PDF editing and automation for individuals and enterprises. Apache-2.0 Document Management v3.3.0 ★ 95,806

Popular alternatives

The tools people most often switch from — and what they switch to.

All alternatives →
Alternatives to Google Analytics Web analytics 22 alternatives Alternatives to Zapier Automation Huginn logo 20 alternatives Alternatives to Slack Team chat 10 alternatives Alternatives to Gmail Email Mail-in-a-Box logo 15 alternatives Alternatives to Pocket Read later 3 alternatives Alternatives to Calendly Scheduling 3 alternatives

Browse by category

From team chat to analytics — pick what you need to replace.

Archiving12 Automation27 Blogging10 Bookmarks17 Calendar & Contacts8 Community-Supported Agriculture (CSA)7 Conference Management5 Content Management Systems (CMS)36 Customer Relationship Management (CRM)6 Database Management17 DNS6 Document Management18 E-books14 E-commerce14 Email Lists9 Email Servers17 Feed Readers20 File Transfer & Synchronization12 Forums33 Institutional Repository and Digital Library Software5 Integrated Library Systems (ILS)3 IRC8 Mail Delivery Agents3 Mail Transfer Agents8 Messaging37 Scheduling7 SIP10 Video Conferencing9 Web Analytics29 Webmail Clients3 XMPP7

Recently updated

New versions, straight from each project's official releases.

Signature PDF logo Signature PDF Free web app for signing, organizing, editing metadata, and compressing PDFs. AGPL-3.0 Document Management v1.11.0 ★ 834 Sync-in Seafile GPL-2.0 File Transfer & Synchronization Samba GPL-3.0 File Transfer & Synchronization Pydio AGPL-3.0 File Transfer & Synchronization Puter AGPL-3.0 File Transfer & Synchronization

How LibreAlts works

  1. Search for the paid tool you use.
  2. Compare open source options: license, platforms, activity.
  3. Download the official release or follow the install guide.

Why you can trust these downloads

Official releases only Every file comes from the project's own release page.
SHA-256 on every file Publish the checksum so you can verify it yourself.
No installers, no bundles No custom installers, no bundled software, no fake buttons.
Updated from source daily Every version and date links back to its source.

How we verify →

Questions

Is open source software really free?

Free to use, share and study under its license. Some projects also sell hosting or support; we mark that.

Is it safe to download from LibreAlts?

We link to official files and show checksums. Always check the checksum for important software.

Can I use it for my business?

Most licenses allow commercial use. Each program page shows whether its license does.

How often is the catalog updated?

Versions and release dates are checked daily against each project's official releases.