# Can I use ISC commercially?

**Short answer:** Commercial use: Yes. Commercial use, modified and redistributed: Yes.

ISC License (ISC): Use, copy, modify and distribute for any purpose with or without fee, as long as the copyright and permission notice appear in all copies.

## Commercial use — Yes

License: [ISC License](https://opensource.org/license/isc-license-txt) (`ISC`, curated)

- Every use you described is granted by ISC, and nothing you described is prohibited.

Duties: attribution, license_notice
## Commercial use, modified and redistributed — Yes

License: [ISC License](https://opensource.org/license/isc-license-txt) (`ISC`, curated)

- Every use you described is granted by ISC, and nothing you described is prohibited.

Duties: attribution, license_notice

## Context
- Sublicensing is not mentioned, so it is not treated as granted.

## Sources
- [ISC License: official text](https://opensource.org/license/isc-license-txt)
- [ISC on the SPDX License List](https://spdx.org/licenses/ISC.html)

## Check it yourself (free, no key)
```json
{
  "tool": "check_license",
  "arguments": {
    "license": "ISC",
    "intended_use": {
      "commercial_use": true
    }
  }
}
```
REST: POST https://www.rightshold.com/v1/licenses/check

_Computed from Rightshold's license profiles; not legal advice. Updated 2026-10-19. JSON: https://www.rightshold.com/answers/can-i-use-isc-commercially.json_