Kai A. Hartung
A BSL-licensed platform unifying transactional and marketing email in one Postgres deployment, with a visual builder and built-in analytics. SSO, RBAC and audit logs sit behind a paid key.
An open-core localization platform, Apache-2.0 at the core, built around in-context editing and a developer SDK. SSO, granular RBAC and use beyond 10 seats need a paid Enterprise licence.
An AGPL-3.0, self-hosted translation-management platform: API-first, with broad localization-format support. A lighter, project-based alternative to Git-centric localization tools.
An MIT-licensed, in-process analytical SQL database: the SQLite for analytics. Embedded and zero-dependency, it queries Parquet, CSV and JSON in place, with no server to run.
The community fork that revived Maybe Finance under AGPLv3 after the startup shut down. All-in-one personal finance: budgeting, accounts, net worth. Fully open and self-hosted, no paid tier.
GPL-3.0 continuous-localization platform that syncs translations with your Git repos. SSO and RBAC are in the open build, so there is no feature paywall. EU-based, self-hosted.
The Linux Foundation fork of Redis after its 2024 relicense: a BSD-licensed in-memory datastore for caching and real-time workloads. Fully open source, but no official managed cloud.
A new fee finally asks companies to pay for the open source they profit from, then hands them a legal way not to. Why it runs on goodwill, bills hardest the ones least able to dodge it, and what a working funding model still has to solve.
BSL 1.1 in-memory datastore: a multi-threaded, drop-in Redis and Memcached replacement for vertical scaling. Source-available, not open source; reselling it as a hosted service is barred.
When you leave a proprietary vendor, you inherit the jobs it used to do: governance, legal, security, and giving back. Use our new free tool, the OSPO Roadmap, to map those jobs, track where you stand, and name who owns each. No login. Live now.
An office suite just set an all-time download record for what it left out. LibreOffice 26.8 hit 1,031,162 installs in a week with no AI, and a million people were escaping the feature Microsoft keeps adding to yours. In rented software, the next change is never yours to make.
Open source rarely fails on the code. It fails when something breaks and no one is accountable to call. Today I'm opening OpenTechHub's Service Provider layer: a directory of verified companies that build, host, and support open source, so anyone leaving vendor lock-in has somewhere to turn.
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.
A Vienna provider of sovereign, self-hosted generative AI infrastructure for European enterprises.
A Swiss IT consultancy focused on advisory, security, and compliance for small and mid-sized organizations.
Encrypted collaboration and storage, assembled from open source and hosted in Germany with client-side encryption.
Most companies quietly maintain their own private copies of open source software, and the upkeep costs far more than anyone puts on the books. The Linux Foundation measured the bill. Contributing your changes back is the cheaper path, and this is why forking almost always loses.
MIT-licensed platform that builds, versions and hosts docs-as-code from Git, with pull-request previews and search. Self-hosting sidesteps the paid hosted tiers but runs a heavy multi-service stack.
Real-time distributed OLAP datastore for user-facing analytics at high concurrency. Apache-governed. A heavy multi-node cluster; managed ops and anomaly detection are the commercial StarTree.
Real-time analytics database for sub-second queries on streaming and batch data, Apache-governed. A heavy distributed cluster to operate; managed ops and the Pivot BI console are the commercial Imply.
Real-time MPP OLAP database that queries open lakehouse tables directly. Apache-licensed, Linux Foundation-governed. A distributed cluster to run; masking and managed ops are the commercial cloud.