Velero
Kubernetes-native backup and disaster recovery: snapshot cluster state and volumes to your own object storage, then restore or migrate namespaces. Apache-2.0; ownership is shifting from Broadcom to the CNCF.
Open Source Alternatives: The Sovereign Stack
A curated database of vetted open source alternatives to proprietary SaaS. Find tools that are safe, compliant, and ready for business.
Showing of 183 solutions
Rook
CNCF-graduated Kubernetes operator that runs Ceph as declarative, self-healing storage: object, block, and file from cluster disks. Fully open; the cost is the Ceph expertise it abstracts but never removes.
OpenEBS
CNCF Kubernetes storage that runs in userspace, with pluggable engines from simple local volumes to replicated NVMe-oF. Apache-2.0 core, but external KMS and the management GUI sit in DataCore's commercial tier.
Longhorn
CNCF-governed, fully open block storage for Kubernetes: highly available volumes with encryption, synchronous replication, and S3/NFS backup. No open-core paywall: the only paid tier is optional vendor support.
SeaweedFS
Apache-2.0 distributed storage exposing S3 and POSIX, tuned for billions of small files and simpler to run than Ceph. Day-2 safety nets like self-healing repair and point-in-time recovery sit behind a paid Enterprise tier.
Overleaf
AGPLv3 self-hosted collaborative LaTeX editor for academic and scientific writing. The free Community Edition omits SSO, per-user sandboxing, and Git sync, which sit behind the paid Server Pro tier.
Voicebox
Local-first AI voice studio powered by Qwen3-TTS and six more engines. Clones voices and synthesizes speech fully on your machine, with no per-character metering, though your own GPU does the work.
Vikunja
AGPLv3 self-hosted task manager: List, Kanban, Gantt, and Table views, free for unlimited users. Catch: admin panel, audit logs, and time tracking stay Pro-gated even when self-hosted.
Ceph
Unified distributed storage that serves one cluster as S3 object, block, and POSIX file. Foundation-governed, standards-based, with no per-GB cloud fees, but it demands real cluster-ops expertise.
Olares
AGPL-3.0 personal cloud OS: a sandboxed, K3s-based app platform for self-hosting files, services, and local AI on hardware you own. Trade-offs are a dedicated-hardware footprint and AGPL network copyleft.
SnapOtter
AGPLv3-or-commercial image toolkit: 50+ tools plus local AI for background removal, upscaling, and OCR in one Docker container. Images never leave your hardware. SaaS embedding needs a paid license.
OpenWhispr
MIT voice-to-text dictation that runs Whisper and Parakeet models fully on-device: hotkey, speak into any app, nothing leaves your machine. Cloud sync, agent mode, and SSO sit behind paid tiers.
Qdrant
Apache-2.0 vector database in Rust for RAG and semantic search, fully self-hostable with no copyleft strings. Multi-AZ high availability, SSO, and audit logs are gated to the managed Qdrant Cloud.
OpenHuman
Local-first AI desktop assistant that keeps your "second brain" in an Obsidian-style Markdown vault and on-device SQLite. Optional local Ollama models, no cloud account. GPL-3.0, single-founder beta.
Paperclip
MIT-licensed control plane for fleets of AI agents: org charts, per-agent budgets, immutable audit logs, and approval workflows. The governance layer proprietary platforms paywall, here free and self-hosted.
OpenViking
AGPL-licensed context database for AI agents: persistent memory, resources, and skills via a filesystem paradigm. Governed entirely by Volcengine (ByteDance); no independent foundation.
OpenSign
AGPL-licensed e-signature platform with unlimited document signing and PDF audit trails. Self-hosted via Docker on MongoDB. No formal compliance certifications disclosed.
Hermes Agent
Self-improving AI agent with persistent memory and autonomous skills. Now adds a native desktop app (macOS, Windows, Linux) on top of 23+ messaging channels. Self-hosted, MIT-licensed, BYOK.
Eclipse Tradista
Eclipse Foundation-governed capital markets platform for trade capture, P&L, and treasury operations. No licence fees or vendor lock-in. Requires Jakarta EE expertise and financial data integration.
Plausible Analytics
AGPLv3-licensed, cookie-free web analytics built in the EU. No consent banners required, sub-1KB script. SSO and automated exports gated behind the Enterprise tier.
Planka
Source-available Kanban boards with real-time collaboration and Markdown support. EU-hosted, Docker-native, but commercial hosting and cross-company use require a paid license.