20 Best Self-Hosted Alternatives to Popular SaaS Apps

Zulip is the most complete truly open source Slack replacement. Its key idea is topics: every message in a channel belongs to a named thread, so you can catch up on a busy day by reading topic titles instead of scrolling. Teams that try it often find it calmer than Slack, though it takes a week to get used to.

The whole server is Apache-2.0 with no paid feature locks. Version 12.3 shipped on September 21, 2026. If you would rather not host it, Zulip Cloud has a free plan, and Standard costs $6.67 a user a month on annual billing.

Why not Mattermost? Its free builds now come with limits. The default free edition caps message history at 10,000 messages, and the fully MIT-licensed Team Edition is meant for small teams. It still works, but Zulip has fewer strings attached.

Jitsi Meet runs video calls in the browser with no account needed for guests: share a link and people join. It has screen sharing, chat, breakout rooms, lobby and passwords, and phone apps for people on the move. The official Docker setup gets a working server running in under an hour.

Video is the heaviest job on this list. The official guide suggests 8 GB of RAM and four dedicated CPU cores, with 4 GB being fine for small meetings. Recording needs a separate component (Jibri) and at least 8 GB more. Bandwidth matters as much as RAM, so host it in a data centre rather than on a home connection.

Umami gives you the analytics most people actually check: visitors, pages, referrers, countries, devices and custom events, on one clean dashboard. It is MIT-licensed with no paid features in the self-hosted version, and it is light enough to share a small server with other apps. Version 3.4.0 shipped on September 17, 2026. The hosted Hobby plan is free for one site and 100,000 events a month.

Plausible is the other strong option, with a polished dashboard, goals, funnels and Search Console integration. The self-hosted Community Edition uses the ClickHouse database, which handles large traffic well but needs 2 GB of RAM and a reasonably modern CPU. Version 3.2 is the current release line. Plausible's hosted plan starts at $9 a month for 10,000 page views, and your fees fund the open source work.

BookStack organises documentation like a library: shelves, books, chapters and pages. That simple structure is why non-technical staff actually use it. It has a friendly editor, page history, search, permissions, and login through LDAP or SSO. It is fully MIT, with no paid tier at all. Version 26.09.1 is current. There is no official Docker image, but the community images from LinuxServer.io are widely used.

Docmost is the closest open source match to Notion-style team docs: real-time editing, spaces, comments, page history, diagrams and embeds. The community edition is free. The Business edition ($6 a seat a month, 10-seat minimum) adds enterprise features such as SSO. Version 0.96.0 shipped on September 8, 2026, so it is still before 1.0.

Looking at AppFlowy or AFFiNE instead? Both are good apps, but their self-hosted servers now come with paid licences or seat caps. Our Notion alternatives guide covers the wider field.

Plane looks and feels like Linear: issues, cycles (sprints), modules, board and list views, and a fast keyboard-friendly interface. It handles real software projects well and is easier to manage than Jira. The Community Edition is free to self-host. Version 1.4.2 shipped on August 23, 2026. Plane's cloud is free for up to 12 seats, and Pro costs $6 a user a month on annual billing.

Vikunja is a to-do and project app with list, Kanban, Gantt and table views, labels, due dates, sharing and CalDAV sync. It runs as a single small program, so it is one of the easiest apps here to host for a family or a small team. Version 2.7.0 shipped on October 2, 2026. Vikunja Cloud starts at 4 euros a month for personal use.

Penpot is the only serious open source alternative to Figma. It runs in the browser, uses open web standards (SVG, CSS, HTML), and has components, design tokens, flex and grid layouts, prototyping and real-time collaboration. Developers like that its layouts map directly to CSS.

Version 2.18.3 shipped on October 6, 2026. The hosted version is free for individuals and small teams, and the Unlimited plan is $7 per editor a month, capped at $175. Self-hosting is free with no feature limits.

Listmonk is a fast newsletter and mailing list manager that handles millions of subscribers on a tiny server. It has lists, segments, templates, campaign analytics, and transactional email through an API. It does not send email itself: you connect it to an email service such as Amazon SES, Postmark or your own SMTP provider. That keeps sending costs very low compared with Mailchimp's per-contact pricing. Version 6.2.0 is current.

Ghost is a publishing platform with newsletters and paid memberships built in. Unlike Substack, it takes no cut of your subscription revenue (you pay only Stripe's fees), and your site, domain and email list are fully yours. Version 6 added ActivityPub, so readers on the fediverse can follow your site. Version 6.69.0 shipped on October 7, 2026.

Self-hosting is free; Ghost(Pro) hosting starts at $18 a month on annual billing for up to 1,000 members. Newsletters need a bulk email service (Ghost uses Mailgun).

Chatwoot puts website chat, email, WhatsApp, Instagram, Telegram and more into one shared inbox for your team. It has canned replies, labels, a help centre and reports. Most features are in the MIT core; some advanced features sit in a separate enterprise folder under a paid licence. Version 4.18.0 shipped on September 18, 2026. The hosted Hacker plan is free for two agents, and Startups costs $19 an agent a month.

Zammad is a ticket-based help desk: email, phone, chat and social messages become tickets with owners, priorities, SLAs, tags and a knowledge base. Everything is in the AGPL edition, with no paid feature lock. It is heavier than most tools here, so give it its own server. The latest stable release is 7.2. Hosted plans start at 7 euros an agent a month on annual billing.

Twenty is a modern CRM that feels like Notion or Airtable: custom objects, views, Kanban pipelines, email and calendar sync, and workflows. It is far easier to set up than the older open source CRMs. A few files are under an enterprise licence; the core CRM is AGPL. Version 2.46.0 shipped on October 9, 2026, and the hosted Pro plan is $9 a user a month on annual billing.

Grist combines a spreadsheet with a real database: typed columns, linked tables, Python formulas, custom forms and per-row access rules. It is excellent for internal tools like inventories, CRMs, and trackers. The self-managed community build (grist-core) is Apache-2.0 and free. Version 1.7.21 shipped on October 9, 2026. Grist's cloud is free to start, and Pro is $8 a user a month on annual billing.

Baserow is the closest Airtable clone: grid, gallery, form and Kanban views, an API for every table, and an app builder. The MIT core covers most needs; premium features such as some views and advanced permissions need a paid licence. Version 2.4.0 shipped on September 29, 2026.

Why not NocoDB? It was a popular Airtable alternative, but it now uses the Sustainable Use License, which is not open source.

Documenso lets you send documents for signature, track who has signed, and keep an audit trail, with templates and an API. Self-hosting keeps contracts on your own servers. Version 2.20.0 shipped on October 8, 2026. The hosted free plan covers 5 documents a month. DocuSeal (also AGPL-3.0) is a good alternative with a simpler setup.

Activepieces is a Zapier-style automation tool with a visual builder, hundreds of app connectors, AI steps and MCP support. Unlike n8n, its core is MIT, which is true open source. Version 0.92.2 shipped on October 7, 2026.

n8n is still the most powerful tool in this space, and we have a guide to self-hosting n8n. Just know that its Sustainable Use License limits commercial use, so it is source-available rather than open source.

Kimai tracks hours by customer, project and activity, then turns them into timesheets, reports and invoices. It works well for freelancers and agencies of any size, and has a mobile-friendly web interface. Version 2.69.0 shipped on October 6, 2026. Kimai Cloud costs 2.99 euros a user a month on annual billing if you want it hosted.

LibreChat gives your team one ChatGPT-style interface for many AI models: OpenAI, Anthropic, Google, OpenRouter, and local models through Ollama. It has user accounts, shared prompts, file uploads, agents and MCP tools. You pay providers per use instead of a monthly seat fee for each person. Version 0.8.8 shipped on October 1, 2026.

Open WebUI is the other popular choice, and we cover it in our home lab guide. Since 2025 it uses its own licence that restricts removing its branding, so it no longer counts as open source by the OSI definition.

Moving chat, docs, tasks and support in one month exhausts a team. Start with one tool that has a clear win, such as analytics or the wiki, and move the next one only when the first is stable.

Back up databases and uploaded files every night to a different location, and try a full restore once. A self-hosted tool without backups is worse than the SaaS app it replaced.

Internet-facing apps get security fixes often. Subscribe to each project's release notes and update at least monthly. Put the apps behind a reverse proxy with HTTPS, as shown in our home lab guide.

Many projects are open core. Check seat caps and paid features before you migrate a whole team, so you do not hit a paywall at user number 11.