AGPL, self-hosted drop-in replacement for Microsoft Exchange: mail, calendar, and groupware with full Outlook and mobile compatibility, under EU jurisdiction. Free tier caps at 5 users.
OpenTechHub
Own your technology stack. We find the open-source alternatives and the accredited providers who deliver them.
Latest Solutions
Browse Solutions
Turns your coding agent into a design engine that outputs prototypes, slides, and UI as local files. Bring your own model, cloud or fully local via Ollama. Early-stage.
Browser-based video editor that runs on-device: no uploads, no watermark, no account. A local-first alternative to ByteDance's CapCut. Still early-stage.
An Apache-2.0 cloud platform (IaaS): build a multi-tenant private cloud on your own hardware, across KVM, VMware, and Proxmox hypervisors. The vendor-neutral answer to VMware Cloud Director.
An offline, open-source Markdown editor for researchers, with Zettelkasten note-linking and citation management. It stores everything as plain .md files, a GPL-licensed alternative to Obsidian.
An offline-first, open-source note app with end-to-end encryption and plain-Markdown storage. A self-hosted alternative to Evernote; sync to your own WebDAV or Nextcloud, with team features paywalled.
The vendor-neutral CNCF standard for traces, metrics, and logs. Instrument once and route your telemetry to any backend, ending the agent lock-in that makes Datadog and New Relic so sticky.
A distraction-free desktop Markdown editor with live preview that works directly on local .md files, with no account, telemetry, or cloud. A fully offline, MIT-licensed alternative to Typora.
MIT-core LLM observability for tracing, evals, and prompt management. A self-hosted alternative to LangSmith, with enterprise compliance controls gated behind a paid license key.
Latest Service Providers
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Formbricks GmbH
Germany
The company behind Formbricks, an open source, self-hostable platform for surveys and customer feedback.
An Indian AI automation studio that builds custom AI agents and maintains the open source Meetily meeting assistant.
Xinity FlexCo
Austria
A Vienna provider of sovereign, self-hosted generative AI infrastructure for European enterprises.
Latest Intelligence
Browse Magazine
Article
Open Source
Digital Sovereignty
The fix is out. Is it in?
Almost four years after a free fix shipped, about one in eight Log4j downloads was still a vulnerable version. Now AI has bank regulators counting the days. Why private copies slow the fix down, what the banks' new alliance changes, and the question to ask your IT team.
Kai A. Hartung
·
2 min read
Article
Open Source
Digital Sovereignty
The bill nobody can add up.
The Dutch government has a Linux desktop on trial, no new money for its digital autonomy plans, and no total for what it pays Microsoft. Leaving shows up as line items someone must sign for. Staying hides in budgets nobody adds up.
Kai A. Hartung
·
6 min read
Article
Open Source
Digital Sovereignty
Open in name only.
Germany spent public millions on a "Sovereign Open Source" AI, then gated it and let a vendor sell it. Switzerland and the Netherlands show the difference: real openness is a mandate, not a label.
Kai A. Hartung
·
2 min read