Built on day one. Rebuilt for today.
One product. One vendor. One engineering hand. 27 years.
Other products in this market change hands — acquired, rolled into private-equity brand umbrellas, handed off to new owners, transitioned from free to paid mid-life, or left dormant for years at a stretch. Demeanor has done none of those things. It is the original .NET obfuscator, and it is still owned, maintained, and shipped by the same engineer who began writing it in 1999 against Microsoft's internal “Lightning” .NET alpha builds — and shipped its first public beta alongside .NET Beta 1 in June 2000.
- Owner: Wise Owl Software (unchanged)
- Developer: Brent Rector (original, unchanged)
- Acquisitions: None
- Brand changes: None
- Free-to-paid transitions: None
- Dormant periods: None
- Acquired by Idera, March 2021
- Rolled into Sembi brand umbrella, January 2025
- Now sits three corporate layers above the customer
- Independent studio until 2010–2011
- Acquired by Red Gate Software
- Not listed among Red Gate's strategic products in 2026
- Free personal project, 2008–2012
- Commercialized under Gapotchenko in 2012
- Free-to-paid transition mid-lifecycle
For a buyer whose procurement window extends past the next vendor acquisition cycle — i.e. someone who wants the vendor on their PO today to still exist, unchanged, when they sign a renewal in 2030 — continuity of ownership is a signal worth reading. It is the cleanest commercial-continuity record in this market and it is not one any other commercial .NET obfuscator can match.
Brent Rector
Know what breaks before you obfuscate.
27 years of .NET obfuscation experience, distilled into a tool that analyzes first and rewrites second. One NuGet package. One MSBuild property. Zero surprises at runtime.