Listmonk
A high-performance, self-hosted newsletter and mailing list manager that provides enterprise-grade mass-mailing capabilities without the recurring per-subscriber tax.
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
DocuSeal
A secure, open-source alternative to DocuSign that enables businesses to automate document workflows and legally binding signatures with full data sovereignty.
Papra
AGPL-3.0 document management with native AES-256-GCM encryption. France-based, no CLOUD Act exposure, zero enterprise tax on self-hosted deployments.
OpnForm
AGPLv3 open-core form builder. France-based, no CLOUD Act exposure, self-hostable via Docker, without Typeform's per-response fees or data held hostage on vendor servers.
NocoDB
Source-available no-code layer for existing SQL databases. Zero record limits, auto-generated REST APIs, without Airtable's per-record pricing or proprietary data lock-in.
Blinko
An open-source, AI-first personal knowledge management tool featuring RAG-powered recall and a sovereign second brain architecture.
Mautic
A GPLv3-licensed, self-hostable marketing automation platform. Unlimited contacts, omnichannel campaigns, and full data ownership, without HubSpot's per-contact pricing.
Wazuh
GPL-2.0 unified XDR and SIEM platform from Wazuh, Inc. All capabilities including RBAC, threat hunting, and compliance mapping modules included in the open-source binary; paid tier is managed cloud only.
Saleor
Headless commerce API for web, mobile, and POS from a single GraphQL core. All platform features in the open-source release; no paywalls.
Pimcore
POCL-licensed PIM, MDM, and DAM platform. Austria-based, EU jurisdiction. A €5M revenue threshold triggers mandatory commercial licensing with no open-source exit path.
Snipe-IT
AGPL-3.0 IT asset management system: tracks hardware, software licences, accessories, and consumables with no user or asset limits. No feature paywalls; SLA support and priority fixes require a paid plan.
Uptime Kuma
MIT-licensed, self-hosted uptime monitoring and status page tool: HTTP/S, TCP, DNS checks with 90+ notification channels; single-instance architecture with no RBAC or multi-region polling.
Authentik
MIT-core identity provider for SSO, LDAP federation, SAML, and OIDC. It unifies authentication across your entire stack. Advanced compliance features and SLA support require the Enterprise edition.
n8n
Source-available, self-hosted workflow automation platform. Unlimited executions, full data sovereignty, no per-task fees. All without Zapier's volume pricing or cloud exposure.
Apache Superset
Self-hosted BI platform with a semantic layer, 40+ chart types, and no per-seat fees, a SQL-first alternative to Tableau and PowerBI at petabyte scale.
Medusa
MIT-licensed headless commerce engine. Zero GMV tax, full database ownership, no revenue sharing, for B2B and DTC architectures that Shopify Plus cannot accommodate.
Infisical
MIT-core secret management platform: end-to-end encrypted secret syncing across your entire infrastructure. SSO, RBAC, and audit logs require the Enterprise edition.
Baserow
MIT-core no-code database platform: unlimited records, no per-row pricing, full relational backend. A self-hostable Airtable alternative; advanced roles and premium plugins require paid plans.
Hoppscotch
Enterprise API development platform. A fast, open-source alternative to Postman for REST, GraphQL, and gRPC testing with full data sovereignty.