Dagu
Add schedules, retries and run history to existing scripts without running Airflow: YAML DAGs, a single Go binary, and no database or message broker to operate.
// SELF-HOSTED
170 entries tagged with "self-hosted"
// COMPARISONS
25 Local speech to text Transcribing meetings, dictation or audio files offline: Meetily, Murmure, Scriberr and BetterWispr compared on models, hardware and what leaves the machine. File and database backup Backing up files and databases with open source tools: restic, Plakar and Databasus compared on encryption, deduplication, scheduling and restore checks. BI and dashboards Building dashboards without Power BI: Metabase, Superset and Redash compared on licensing, what you have to run, who maintains them and what paid plans keep. E-signature Getting PDFs signed without DocuSign: three open source apps and a Node.js library compared on the certificate they apply, legal standing and paid plans. Forms and surveys Replacing Typeform or Google Forms with software you host: LimeSurvey, Formbricks and OpnForm compared on setup, where responses live, licences and paid tiers. GRC and compliance Running ISO 27001, NIS2 or SOC 2 compliance on your own server: three open source GRC tools compared on bundled frameworks, hosting needs and paid editions. Headless CMS Serving content over an API or keeping it in Git: three open source headless CMSs compared on framework, database, hosting and what the paid plans hold back. Observability Keeping logs, metrics and traces on your own servers: five open source tools compared on what they ingest, where they store it, licensing and project health. Scheduling Taking bookings without Calendly: Cal.diy, the part of Cal.com that stayed open source, Easy!Appointments and Rallly compared on stack, calendars and pricing. Social media scheduling Schedule social media posts from your own server: three open source tools compared on supported networks, developer apps, paid editions and what you run. Web application firewall (WAF) Stop attacks before they reach your web apps: OWASP rules, shared IP reputation or a trained model. Three open source WAFs compared, paid tiers included. Web scraping Scraping the web with open-source tools: eight projects compared on headless browser, proxies, language, what they leave exposed and how active the repo is. Workflow automation Replacing Zapier or building AI agents on your own server: six automation tools compared on licensing, free-edition limits, the stack and project status. Self-hosted CAPTCHA Replacing reCAPTCHA with a CAPTCHA you host: ALTCHA, Cap and mCaptcha compared on proof of work, server setup, visitor data, licensing and release health. Proxmox multi-cluster consoles Running several Proxmox clusters from one console: the vendor's own manager and two third-party tools compared on migration, access rights and licensing. Cloud storage Swapping Google Drive or Dropbox for a server you control: three tools compared on sync clients, encryption, what you need to run and the licence terms. Git forges Moving your Git repositories off GitHub: two forges you run yourself and one hosted by a non-profit, compared on CI, packages, code review and governance. Newsletters Self-hosted newsletters without Mailchimp: three open-source tools compared on SMTP relays, deliverability, what you have to run and how each is licensed. PaaS and hosting panels Running your apps on your own server, Heroku-style or cPanel-style: three tools compared on what they install, the access they take and their paid tiers. Remote desktop Taking control of remote machines without TeamViewer: three open source tools compared on what they install, the server they need, paid plans and licence. Team chat Replacing Slack with team chat you host yourself: Mattermost, Rocket.Chat and OpenHive compared on their free editions, database, calls and mobile apps. Team wikis Keeping your team's documentation on your own server: BookStack, Outline and Wiki.js compared on page structure, sign-in, licensing and release status. Single sign-on (SSO) Putting a single sign-in in front of your self-hosted apps: five open-source tools compared on protocols, user accounts, memory needs and licensing terms. Status pages and uptime monitoring Watching your services and publishing their status without a SaaS: six open-source tools compared on database, checks, status page and project health. Web analytics Replacing Google Analytics with a tool you host yourself: eight open-source options compared on licence, required database, cookies and their release pace.
// ENTRIES
145 entries
Cachety
Watermark ID copies and payslips without uploading them: PDFs and photos are processed in the browser, with real redaction, traceable copies and AES-256 PDFs.
BunkerWeb
Protect web apps behind an NGINX reverse proxy that enables ModSecurity, the OWASP Core Rule Set and automatic bans by default. AGPL core, SSO in the paid tier.
CISO Assistant
One control, many standards: a self-hosted GRC platform that assesses risk and compliance against 220+ frameworks, including ISO 27001, NIS2, SOC 2 and DORA.
Apache Guacamole
Remote desktop in a browser tab, with no client or agent: a self-hosted gateway to RDP, VNC and SSH servers, with SSO, MFA and session recording built in.
Mattermost
Slack-style team chat you host yourself, written in Go on PostgreSQL. What its two free editions keep, what the paid plans hold back, and how it is licensed.
Mixpost
Schedule posts to Facebook Pages, X and Mastodon from your own server under the MIT license. Instagram, LinkedIn, the queue and the API are paid Pro features.
Nextcloud
Sync and share files from a server you control, then add calendars, contacts and hundreds of other apps on top. Open source PHP server under the AGPL.
OpenSign
Get PDFs signed from your own server with an AGPL Node.js and MongoDB app. The bundled certificate is public and expired, and the API needs a paid cloud plan.
Proxmox Datacenter Manager
Run several Proxmox VE clusters and Backup Servers from the vendor's official web console, including live migration of VMs and containers between clusters.
Redash
Turn your SQL queries into charts and shared dashboards in the browser: a BSD-licensed open source BI tool, maintained by its own community since 2023.
restic
Encrypted, deduplicated backups to storage you don't trust: local disk, SFTP, S3, rest-server or rclone. One Go binary, with no built-in scheduler or GUI.
Wiki.js
Self-hosted team wiki whose pages sync both ways with a Git repository, written in Markdown or a visual editor. 2.x is stable; 3.0 is a PostgreSQL-only beta.
Plausible
Website stats with no cookies and no stored IP addresses: open source web analytics, as an EU-hosted cloud or self-hosted on PostgreSQL and ClickHouse.
Plakar
Back up files, databases and Kubernetes clusters to one encrypted, deduplicated store you can browse without restoring. Scheduling is left to cron or systemd.
Traefik Manager
Add Traefik routes and middlewares from a browser: a self-hosted UI merges each change into your file provider YAML, keeps comments, and backs up every write.
VoidAuth
One login in front of your self-hosted apps: OIDC and ForwardAuth from a single container, invite-only accounts. A recent project with one main maintainer.
Carbon
Planning, shop floor and quality in one Postgres database: an open source ERP, MES and QMS for complex assembly, contract work and high-mix, low-volume runs.
CheckCle
Watch sites, servers and SSL certificates from one container that needs no separate database. A young PocketBase project with no release since September 2025.
Papra
Keep invoices and contracts on your own server and find them by their text: OCR, email or watched-folder intake, one Docker container running on SQLite.
RSSMonster
Follow a busy story without rereading every syndicated copy: a self-hosted RSS reader that groups articles into events using local or remote AI models.
LimeSurvey
Run branching, multilingual surveys on your own PHP server under the GPL, or in the vendor's cloud, which is priced by the number of responses you collect.
OpnForm
Typeform-style forms on your own server with no cap on responses. The free self-hosted edition allows two accounts per instance; a paid license lifts the limit.
Rallly
Find a date the whole group can make with a poll people answer without an account. Self-hostable under AGPL: free for one account, a paid license beyond that.
Shlink
Short links on your own domain, created through a REST API or CLI and redirected by country, language or device. MIT-licensed PHP server, separate web UI.
Bracket
Run a tournament on your own server: round-robin pools that feed a knockout bracket, Swiss rounds paired from past results, drag-and-drop court scheduling.
MeshCentral
Take control of Windows, Linux and macOS machines from a browser via an agent, and of powered-off PCs via Intel AMT. Lightweight Node.js server, Apache 2.0.
netboot.xyz
One USB stick or PXE entry to install Linux, boot a live distro or repair a disk, from an iPXE menu that downloads each kernel and initrd at boot time.
Rota
Rotate your own HTTP and SOCKS proxies behind a single port: country pools, per-user fallback chains, dead-IP cleanup. The proxies themselves are not included.
TastyIgniter
Take orders and table bookings on the restaurant's own site, commission-free. Self-hosted Laravel app under MIT; needs a cron job, plus Composer for extensions.
ToolJet
Build admin panels and dashboards on your databases and APIs by drag and drop. Workflows, RBAC and GitSync sit outside the AGPL code, in the Enterprise edition.
VaultS3
Run your own S3-compatible storage from one Go binary, dashboard and IAM included. AGPL, one maintainer, clustering in beta: the README advises a single node.
OneURL
Linktree-style link page still running at oneurl.live, but its official GitHub repo now returns a 404 and the BSD-licensed code survives only in a copy.
LinkStack
A link-in-bio page on your own server instead of Linktree: copy the archive onto PHP hosting, finish setup in a browser, and host pages for several users.
Traceway
Traces, logs, exceptions and on-call paging in one OpenTelemetry-native observability platform, in Go under MIT. A young project with a breaking 2.0 release.
StudioCMS
An admin dashboard served by the Astro site itself, with content in a SQL database, accounts and plugins. It needs Astro 7 and SSR, and is still on 0.x.
Swetrix
JavaScript errors and traffic in one dashboard: cookieless, open source web analytics, hosted or self-hosted, plus what the free Community Edition leaves out.
TinaCMS
Let non-developers edit the Markdown in a GitHub repo from a visual editor: every save is a commit, handled by TinaCloud or by a self-hosted Node.js backend.
Shelf.nu
Know where every piece of equipment is and who has it: phone-scanned QR labels, bookings and kits, AGPL and self-hostable if you bring your own Supabase.
Grocy
Track what is in the pantry and when it expires, with a shopping list that fills itself: a self-hosted PHP web app, one household per instance, PHP 8.5 only.
Cachet
Tell customers about outages and planned maintenance: a self-hosted PHP status page fed by its API or by your monitoring tools. Where its license and v3 stand.
ModernWMS
Open source warehouse management system for SMEs: receiving, stock, in-house operations and shipping, built on .NET 7 and Vue 3, with QR codes and Docker.
RustMailer
Self-hosted email middleware in Rust: multi-account IMAP sync, SMTP sending, Gmail API, VRL webhooks and NATS, all exposed behind a single REST and gRPC API.
Unstract
Turn invoices, contracts and scans into JSON with an LLM, as an API or ETL pipeline. A self-hosted AGPL platform that hands OCR to a separate text extractor.
notabene
Review Markdown docs by commenting on the rendered page, then have an AI agent apply each note to the source and journal it, with git diffs to approve. No SaaS.
Rybbit
Session replays, funnels and retention without cookies: open source web analytics, on an EU-hosted cloud or self-hosted on ClickHouse behind an HTTPS domain.
Easy!Appointments
Online booking for a team that sells services, running on plain PHP and MySQL hosting. Google and CalDAV sync, but no automatic reminders and no payments.
Lychee
Keep and share photos on your own server: an MIT-licensed PHP gallery with nested albums, public links behind a password, or access limited to named accounts.
mCaptcha
Block bots without image puzzles: a self-hosted Rust CAPTCHA server whose proof of work gets harder as traffic rises. Its only release dates from March 2024.
Open Web Analytics
Click heatmaps and session recordings on your own server: open source PHP and MySQL web analytics, what it takes to run it, and how often it ships releases.
OpenSERP
Google, Bing or Yandex results as JSON with no API key: a headless Chromium on your own server reads them, and runs into the engines' CAPTCHAs and blocks.
authentik
One sign-in for every app you self-host: a Python identity provider for OIDC, SAML, LDAP and RADIUS that needs only PostgreSQL, with a paid Enterprise tier.
Gatus
Uptime monitoring declared in versioned YAML: a self-hosted status page with HTTP, DNS, TCP and ICMP checks, conditions on each response, and built-in alerts.
Jellyfin
Stream your own movies, shows and music from a home server, with no subscription or tracking. What it needs in GPU and storage, and what version 12.0 breaks.
Krayin
Lead pipelines, workflows and PDF quotes on your own server: an MIT-licensed Laravel CRM that needs MySQL or MariaDB and charges for WhatsApp and VoIP add-ons.
listmonk
Run mailing lists and campaigns from a Go binary and PostgreSQL. Mail goes via an SMTP relay you choose (SES, Postmark, your own), which owns deliverability.
Navidrome
Stream your FLAC and MP3 collection to a browser, Subsonic apps or Jellyfin clients. Go server under GPL-3.0; needs ffmpeg and a properly tagged library.
Hindsight
Long-term memory for AI agents: an LLM turns writes into facts and entities, four retrievers bring them back. MIT server on PostgreSQL, 1.0 since October 2026.
Restreamer
Push one live feed to YouTube, Twitch or any RTMP endpoint from your own server or a Raspberry Pi: self-hosted streaming in Docker, with SRT and HLS built in.
Openship
Deploy apps to your own server from GitHub: builds, domains and TLS handled, driven from a desktop app, web dashboard or CLI. A 0.x project launched in 2026.
Probo
Prepare for SOC 2 or ISO 27001 in an MIT-licensed GRC driven from a CLI or MCP. The vendor's paid offer is a compliance officer who runs the program for you.
OpenHive
Slack-style team chat that runs on your own Supabase project: channels, threads, LiveKit calls, webhooks. MIT-licensed, still at version 0.1.0 with no release.
OpenObserve
Keep logs, metrics and traces as Parquet files on S3: a self-hosted observability platform in Rust, under AGPL, with SSO and roles left to the enterprise build.
OpenAdServer
Self-hosted Python ad server with eCPM ranking and PyTorch click prediction, but an alpha 0.1.0 whose current code crashes on startup with an ImportError.
Technitium DNS Server
Network-wide ad and malware blocking plus DNS encrypted over DoT, DoH or DoQ: an open source resolver and DNSSEC zone server, written in C# to run on .NET 10.
Tunarr
Round-the-clock TV channels built from a Plex, Jellyfin or Emby library, served as an emulated HDHomeRun tuner or an M3U playlist for any IPTV player.
Homebox
Know which box each household item sits in and where its receipt is: a self-hosted inventory written in Go, with printable QR labels, on SQLite or PostgreSQL.
wg-easy
Manage WireGuard clients from a browser: QR codes, config links that expire after five minutes, per-client firewall rules and expiry dates, in one container.
Fleetbase
Dispatch deliveries and track drivers live on a self-hosted Laravel logistics platform. Free under AGPL in-house; reselling as SaaS takes a commercial license.
ISMS Builder
Keep your ISO 27001 and NIS2 management system on your own server, not in a SaaS. You import the ISO controls yourself, and one maintainer runs the project.
Open Kiosk
Checkout with no POS subscription: a touchscreen kiosk built from a LattePanda, an ESP32-driven thermal printer and a React app on Firebase. OSHWA-certified.
Superlog
Groups production errors into incidents with Claude: OpenTelemetry observability on ClickHouse and Postgres. The investigation agent itself is not in the repo.
Yopass
Get a password or file to someone without it sitting in Slack or email: the browser encrypts it with OpenPGP and the self-hosted server stores only ciphertext.
BrightBean Studio
Schedule posts to eleven social networks from your own server with a Django app and no paid edition. No X connector, and no numbered release in six months.
DocuSeal
Get PDFs filled in and signed on your own server: an AGPL Rails app with an API and a self-signed certificate by default. SSO and white-label are paid extras.
Hoodik
Keep files on your own server without the server being able to read them: encryption in the browser, a single Rust container, but a non-commercial license.
Scriberr
Transcribe audio files on your own server with Whisper, Parakeet or Canary and label each speaker. Single user only, and no release since December 2025.
Checkmate
Know when a site stops answering or a disk fills up: self-hosted monitoring backed by MongoDB, with an agent on each server and public status pages, under AGPL.
Flowsint
Link domains, IPs, emails and usernames on one investigation graph that DNS, WHOIS and API lookups keep extending. An open source OSINT tool that runs locally.
UnInbox
Answer support@ or sales@ as a team: comments inside threads, a status on each email, a screener for new senders. AGPL code; self-hosting is still undocumented.
Falcon-Perception
Pick out objects from a text prompt or OCR a whole page: the inference code for TII's Falcon vision-language models, built for NVIDIA GPUs and Apple Silicon.
SigNoz
Go from a service latency chart to its traces and their logs in one tool: OpenTelemetry observability on ClickHouse, with five services to run if you self-host.
ntfy
Phone alerts from any script that can send an HTTP POST: an open source pub-sub notification service, free on ntfy.sh without an account, or self-hosted.
Keila
Newsletters and signup forms without Mailchimp: open source Elixir software you run behind your own SMTP relay, or that its maker hosts for you in the EU.
Meetily
Meeting notes transcribed on your own machine with Whisper or Parakeet. The text only reaches a remote LLM if you choose one for the summary. MIT desktop app.
drawDB
Draw a database schema in the browser without signing up and get the SQL for six engines, or start from an existing database. AGPL-licensed and self-hostable.
Gogs
Host your Git repositories from a single Go binary and SQLite, even on a Raspberry Pi. The forge Gitea was forked from, with rare, mostly security-fix releases.
Hyperswitch
One payments API in front of Stripe, Adyen and other processors, with rule or auth-rate routing and a PCI card vault, self-hosted or run as a cloud service.
Metabase
Dashboards without writing SQL: an AGPL business intelligence tool that keeps SSO, row-level security and full app embedding for its Pro and Enterprise plans.
Puter
Run a desktop, your files and an app store in a browser tab, plus an SDK that gives web apps storage and AI with no server. Open source and self-hostable.
Rocket.Chat
Team chat you host yourself, free for up to 50 users on the Starter plan. Matrix federation and air-gapped installs need a paid plan, priced on request.
Quackback
Find out what customers want, rank it by votes and tell them when it ships: an AGPL-licensed feedback and support platform you host yourself on PostgreSQL.
Flowise
Drag-and-drop AI agents and RAG chains, each served over its own REST API. The project was archived in August 2026 and ships no releases or security fixes.
open-appsec
Block web and API attacks without maintaining signatures: a model that learns your traffic, plugged into NGINX, Kong or Envoy. Anti-bot and IPS cost extra.
2FAuth
TOTP and HOTP codes generated on your own server and read in any browser: a multi-user PHP web app that can share codes without ever revealing the secret.
PegaProx
Run several Proxmox VE clusters and XCP-ng pools from one self-hosted web console with cross-cluster migration. The docs recommend each cluster's root login.
ProxCenter
Watch several Proxmox VE clusters and Backup Servers from one vCenter-style web console. Community edition is AGPL; migration and DRS require Enterprise.
Databasus
Scheduled PostgreSQL, MySQL, MariaDB and MongoDB backups run from a web UI, sent to S3, SFTP or Google Drive. Physical backups and PITR need PostgreSQL 17+.
NocoDB
Run an Airtable-style database on your own server: linked tables, kanban and form views, a REST API. Fair-code since 2026, Postgres and Redis in production.
Apache APISIX
Change routes, upstreams and plugins on a running API gateway without a restart. Apache-2.0, built on NGINX and etcd, it also runs as a Kubernetes ingress.
Authelia
Add SSO and 2FA to any web app at the reverse proxy, without touching its code. Accounts stay in a YAML file or an LDAP directory, with no sign-up flow.
GoAccess
Website traffic stats with no script and no cookies, read from server logs: open source web log analyzer for Apache, Nginx or Caddy, in the terminal or as HTML.
Outline
Team wiki with live co-editing and nested documents. Source-available under BSL 1.1, and sign-in requires Google, Slack, Microsoft, Discord or an OIDC provider.
CrowdSec
Ban IPs caught attacking other servers before they reach yours: a log-based detection engine and WAF that trades your alert metadata for a shared blocklist.
ConvertX
Convert video, documents, images and e-books on your own server. One upload form drives FFmpeg, LibreOffice, Pandoc, Calibre and 18 other conversion tools.
msgvault
Keep your own copy of your email and chat history: Gmail, IMAP, Slack and WhatsApp archived on disk, searchable offline and over MCP. Still alpha software.
OpenPanel
Each hosting account runs in its own containers: a cPanel-style control panel, free for up to 3 accounts, with a paid license required to resell hosting.
SMS Gateway for Android
Turn an Android phone and its SIM into an SMS API: send texts with an HTTP call, get incoming ones as webhooks, stay on the LAN or use a self-hosted relay.
OpenSEO
Keyword research, rank tracking, backlinks and audits paid per DataForSEO request: an MIT-licensed SEO tool to self-host and drive from AI agents over MCP.
Formbricks
Surveys triggered inside your app or on your site by a click, page view or exit intent. Self-hostable AGPL core; segments, SSO and 2FA need a paid license.
Netdata
Per-second metrics with nothing to configure, from a GPL agent. Reading logs takes a Netdata Cloud login; seeing more than five nodes takes a paid plan.
Postiz
Schedule posts to 30+ networks from your own server, with nothing held back for the cloud. You run Temporal, Postgres and Redis, plus an app per major network.
Gitea
Repos, code review, CI and packages on your own server: an MIT-licensed Git forge in Go, governed jointly with Gitea Ltd, which keeps SAML for its paid edition.
LibreDesk
One shared inbox on your own server for support email, website chat and WhatsApp: an AGPL-licensed Go helpdesk with SLA alerts, backed by PostgreSQL and Redis.
PriceGhost
Get price-drop alerts from your own server: a self-hosted tracker whose dedicated scrapers mostly target US retailers, with no commits since February 2026.
Plane
Issues, sprints and roadmaps in an open-source tracker pitched against Jira and Linear. The AGPL self-hosted edition only gets the features of the free tier.
Zitadel
Give each B2B customer its own organization, users and login rules: an OIDC, SAML and SCIM identity server on PostgreSQL or in the cloud. AGPL since v3.
Coolify
Deploy apps, databases and services to servers you own, Heroku-style and open source. Coolify Cloud, from $5 a month, hosts only the dashboard, not your apps.
Papermark
Find out who opened a shared document and how long each page was read. Tracked links and data rooms, an AGPL core, and self-hosting that needs hosted services.
Matomo
Measure site traffic on your own server: GPL web analytics in PHP with server log import, paid heatmap plugins and a CNIL mode for consent-free tracking.
PostHog
Track what users do inside your app and test features behind flags: open source product analytics, in the cloud or self-hosted up to about 100k events a month.
Stirling PDF
Sign, redact, OCR and convert PDFs on your own machine or server instead of an online service. Open core, free up to five users, with automation capped monthly.
Meilisearch
Typo-tolerant search-as-you-type for sites and apps: a Rust engine under MIT with hybrid vector search, where replication needs the paid Enterprise Edition.
n8n
Chain APIs, databases and AI agents on a self-hosted canvas. The fair-code license allows internal use but no resale as SaaS; SSO and Git versioning are paid.
Penpot
Interface mockups that hand developers SVG, CSS and HTML: an open source Figma alternative, used in the cloud or self-hosted with PostgreSQL and Valkey.
Seafile
Sync files block by block to your own server, in libraries you can lock with a password. Community runs in Docker; full-text search and S3 storage are Pro-only.
Strapi
A REST API generated for every content type: a Node.js headless CMS on PostgreSQL, MySQL or SQLite. Review workflows, SSO and audit logs need a paid plan.
Chatwoot
One shared inbox for website chat, email, WhatsApp and social DMs, on your own server. The core is MIT-licensed; Captain AI and SAML SSO need a paid plan.
ALTCHA
Blocks form bots without image puzzles or cookies: an accessible MIT proof-of-work widget, server libraries in 11 languages. Risk-based checks cost extra.
BookStack
Team documentation filed into shelves, books, chapters and pages: an MIT-licensed PHP wiki you host yourself on MySQL or MariaDB, with no paid edition.
Shinobi
Record IP and USB cameras and watch them from a browser: a self-hosted NVR in Node.js, free for home use, paid as soon as it runs in a shop or business.
Cap
Stops bots without image grids: the browser solves a proof of work and a Docker server you run checks it, with no cookie and no profiling. Apache 2.0.
Check If Email Exists
Find out whether an email address exists before mailing it: an MIT-licensed Rust library that queries the domain's SMTP server, with a CLI and an HTTP API.
Paperclip
Track several coding agents like Claude Code or Codex on one ticket board, with budgets and review gates: a self-hosted MIT server first released in March 2026.
Activepieces
Chain your apps into visual flows on your own servers. The core is MIT-licensed, while SSO, roles, team projects and AI agents on your instance need paid plans.
Cal.com
Booking pages you host yourself: Cal.com closed its code in April 2026, and the open part lives on as Cal.diy, MIT-licensed, without teams or workflows.
changedetection.io
Know when a web page changes, from your own server: text, price, stock or screenshots compared. Chrome is optional; the hosted plan costs $8.99 a month.
Documenso
Get PDFs signed by email link from your own server, under AGPL. The instance's certificate seals each file; advanced and qualified signatures cost extra.
OneUptime
Uptime checks, on-call, status pages, logs and traces in-house: what self-hosting takes (three databases, 16 GB of RAM recommended) and what stays paid.
RustDesk
Remote control through a relay server you run yourself, free under AGPL. The web console, user accounts, 2FA and SSO stay in the paid, yearly Pro server.
Twenty
Shape a CRM around your own business, with objects and fields built in the UI or in TypeScript. Open source and free to self-host; SSO needs a paid key.
Umami
Traffic stats without cookies, on a single PostgreSQL database: MIT-licensed open source web analytics, self-hosted or on Umami Cloud, with events and funnels.
Uptime Kuma
Get alerted when a service goes down and show it on a status page: MIT-licensed self-hosted monitoring with HTTP, DNS and database checks on a single instance.
Usertour
Walk users through a web app with product tours, checklists and NPS surveys built in a visual editor: an open-core, self-hostable alternative to Appcues.
BillionMail
Send newsletters from your own mail server: Postfix, Dovecot, Rspamd and a campaign tool in one Compose stack. Needs outbound port 25 open and a PTR record.