BUSL-1.1 (source-available)
Stella Ops Suite is source-available under BUSL-1.1. You can inspect, fork, and self-build the code. Official releases are signed and verifiable.
Licensor
The Licensed Work is licensed by Е-САЛЮШЪНС ЕООД (e-Solutions EOOD), a company registered in Bulgaria under UIC (ЕИК) 175177528, with its seat at 61 Bratya Buxton Blvd., Block B, Floor 5, Apt. 7, 1618 Sofia, Bulgaria. "Stella Ops" is that company's trading name, not a separate legal person. The same company licenses and supports the software and is the counterparty on any commercial licence you buy.
Paid checkout, where available, is provided by authorised resellers acting as merchants of record. See the applicable Buyer Terms and Privacy Notice.
What the licence permits
BUSL-1.1 is source-available, not open source. Its Additional Use Grant permits free production use — real production, not evaluation only — within these limits, for each installation:
3 environments
100 new-digest scans per rolling 24 h
All features included
Both limits apply together: exceed either one and production use needs a paid plan. An "installation" is one deployment sharing one persistent data store, however many hosts it runs on.
- Beyond those limits: production use requires a paid plan — Plus, Pro or Enterprise.
- No hosted service for third parties: the free grant never covers running Stella Ops Suite as a SaaS, managed service or service bureau for anyone outside your own organisation, at any size. That needs a commercial licence.
- Change Date: 2030-01-20, or four years after a version's first public release, whichever comes first.
(A "new-digest scan" is the first deep scan of an image digest this installation has not seen before. Re-deploying or promoting an already-scanned digest consumes nothing.)
These limits are contractual and observed on the honour system. There is no quota enforcement in the product and no token that raises them — nothing in the software checks a licence at all, which is also why an air-gapped installation needs no licence server and no outbound connection. We are telling you the boundary, not policing it.
Source Available
The Stella source code is available under BUSL-1.1. You can inspect, audit, and verify every line of code that runs in your environment.
- Audit the code yourself
- Build from source if needed
- Plugin development and sale are permitted, provided the plugin does not include, copy or modify Licensed Work source code.
Procurement FAQ
Is BUSL-1.1 acceptable for enterprise procurement?
Yes, provided it is reviewed for what it is. BUSL-1.1 is a source-available licence also used by HashiCorp, MariaDB and CockroachDB. It is not a permissive licence: the source is available for audit, modification and self-build, but free production use is permitted only inside the Additional Use Grant set out above, and offering Stella Ops Suite as a hosted service to third parties is excluded. Anything beyond the grant requires a commercial licence.
What are the internal redistribution rules?
You may freely deploy Stella Ops across your organization, subsidiaries, and contractors working on your behalf. Internal redistribution includes: multiple data centers, cloud regions, development/staging/production environments, and air-gapped networks. Each environment consumes one environment slot from your tier. There are no per-seat or per-user fees—only environment and scan limits apply.
Plain-language summary. The LICENSE file in the source repository is the operative text.