UPX vs Themida

UUPX8.9Visit Themida7.8Visit

Higher score U UPX #2 in Executable Packers 8.9/10 Free plan Free plan✓ 0 of 1 features Visit UPX

vs

Themida #6 in Executable Packers 7.8/10 Paid ✓ 1 of 1 features Visit Themida

• UPX fits best

  Free cross-platform compression

• Themida fits best

  Feature-rich Windows executable protection

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Side by side

Feature	UUPX 8.9/10 Visit ↗	Themida 7.8/10 Visit ↗
At a glance
Editor score	8.9	7.8
Ranking	#2 in Executable Packers	#6 in Executable Packers
Best for	Free cross-platform compression	Feature-rich Windows executable protection
Pricing model	Free	Paid
Starting price	Free plan	€79/yr
Free plan	✓ (best)	—
Free trial	—	—
Deployment	Desktop	Desktop
Platforms	Windows, macOS, Linux	Windows
Support	Docs	Email, Docs
Built for	Solo, Small business, Mid-market, Enterprise	Solo, Small business
Features UPX 0/1 · Themida 1/1
Protection features	—	✓ (best)
Specs
Supported platforms	Windows, macOS, Linux	Windows
Binary formats	PE, ELF, Mach-O, COFF, DOS/COM, DOS/EXE, DOS/SYS, Atari/TOS	EXE, DLL, OCX, BPL
Compression levels	Advanced	Not checked yet
Architecture support	Multi-architecture	32/64-bit
License model	Perpetual	Perpetual
Our review
Pros	Supports Windows, macOS, Linux, and multiple executable formats Offers compression levels 1–9, --best, and multiple methods Includes decompression, integrity checks, checksums, and size reporting	Combines encryption, virtualization, mutation, and anti-debugging defenses Protects EXE, DLL, OCX, and BPL files across 32/64-bit architectures Includes XBundler and command-line support for deployment workflows
Cons	Command-line operation may require technical familiarity Provides no verified protection features Compressed commercial distribution has special license conditions	Windows-only coverage limits platform flexibility The Developer License starts at €249 one-time Annual renewal plans are restricted to existing customers
Our verdict	UPX is a free, portable, open-source command-line packer for compressing executable programs, DLLs, libraries, and other supported binaries. It supports Windows, macOS, and Linux, with coverage for formats including PE, ELF, Mach-O, COFF,… Read the review →	Themida is a Windows software protection system for developers protecting native executables and dynamic libraries. It supports x86 and x64 EXE, DLL, OCX, and BPL files, making it suited to teams that need to raise the cost of reverse… Read the review →

Strengths and trade-offs

• UPX — where it wins

  • Supports Windows, macOS, Linux, and multiple executable formats
  • Offers compression levels 1–9, --best, and multiple methods
  • Includes decompression, integrity checks, checksums, and size reporting

  Where it doesn't

  • Command-line operation may require technical familiarity
  • Provides no verified protection features
  • Compressed commercial distribution has special license conditions

• Themida — where it wins

  • Combines encryption, virtualization, mutation, and anti-debugging defenses
  • Protects EXE, DLL, OCX, and BPL files across 32/64-bit architectures
  • Includes XBundler and command-line support for deployment workflows

  Where it doesn't

  • Windows-only coverage limits platform flexibility
  • The Developer License starts at €249 one-time
  • Annual renewal plans are restricted to existing customers

• UUPX8.9/10 · Free plan

  A free, cross-platform packer with broad format support and detailed compression controls.

  Visit UPXFull verdict →
• Themida7.8/10 · Paid

  Feature-rich Windows executable protection with strong defenses and a high entry price.

  Visit ThemidaFull verdict →