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 (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 (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
• ISC on the SPDX License List

Check it yourself (free, no key)

{
  "tool": "check_license",
  "arguments": {
    "license": "ISC",
    "intended_use": {
      "commercial_use": true
    }
  }
}

Computed from Rightshold's license profiles; not legal advice. Updated 2026-10-19. JSON · Markdown