Denise
Denise: A free, open-source emulator with strong accuracy and useful debugging tools. Ranked #5 of 22 in Amiga Emulators by our editors (8.2/10); pricing: Free plan; best for cycle-accurate desktop emulation and debugging.
At a glance
- Editor score8.2 / 10
- PricingFree plan
- Best forCycle-accurate desktop emulation and debugging
- Free planYes
- Paid fromFree
- Amiga modelsA1000 (OCS/ICS), A500 (full OCS), A500 (ECS Agnus with OCS Denise), A500+, A600
- Facts checked21 Sep 2026
Where it wins
- Cycle-accurate OCS and ECS Amiga emulation
- Save states, rewind, RunAhead, shaders, and hard-disk support
- Built-in debugger and disassembler for technical users
Where it doesn't
- Amiga coverage is centered on A1000, A500, A500+, and A600
- Desktop-focused platform support excludes mobile systems
- Requires compatible ROM files for documented Kickstart support
Our verdict on Denise
Denise is a free, open-source desktop emulator for Commodore 64 and Amiga systems. It is aimed at users who want cycle-accurate emulation, configurable virtual hardware, and tools for examining software behavior. Its Amiga support covers A1000, A500, A500+, and A600 configurations, using OCS and ECS chipsets. Denise runs on Windows 7+, macOS with Intel or ARM support, Linux, and BSD, and is distributed under the GNU General Public License version 3.0.
Its strongest area is the combination of emulation accuracy and playback controls. Denise supports save states, rewind, and RunAhead, while shader-based rendering works through OpenGL, D3D11, and Metal. Hard-disk emulation supports ADF, HD-ADF, HDF, IPF, DMS, and SCP disk image formats, with up to four virtual disk drives. Memory can be configured across Chip RAM, Slow RAM, and Fast RAM, giving users more control over the emulated system. AROS firmware is preinstalled, and Kickstart ROM files are supported separately.
Denise also fits technical workflows better than a basic game-focused emulator because it includes an Amiga debugger and disassembler. That makes it suitable for debugging, preservation, and investigating software execution as well as running classic applications and games. The trade-off is narrower Amiga model coverage: the listed configurations focus on the A1000, A500, A500+, and A600, all within OCS or ECS emulation. Choose Denise for accurate desktop emulation, rendering options, disk support, and debugging tools; users seeking broader Amiga hardware coverage should consider a product that supports more configurations.
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Denise pricing
Denise fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Amiga models | A1000 (OCS/ICS), A500 (full OCS), A500 (ECS Agnus with OCS Denise), A500+, A600 |
| Host platforms | Windows 7+, macOS (Intel and ARM), Linux, BSD |
| Save states | Yes |
| Netplay | Not verified |
| Disk image formats | ADF, HD-ADF, HDF, IPF, DMS, SCP |
| Kickstart included | Not verified |
| Hardware acceleration | Yes |
| Deployment | Desktop |
| Platforms | Windows, macOS, Linux |
| Support | Docs, Tickets |
| Built for | Solo, Small business (editorial estimate) |
| Pricing | Free plan |
| Website | sourceforge.net |
| Facts checked | 21 Sep 2026 |
Alternatives to Denise
- AmiberryA free, broad Amiga emulator with strong media, model, and platform support.9.4
- CopperlineA broad, free Amiga emulator with browser access, debugging, and rollback Netplay.9.2
- Amiga ForeverA broad commercial Amiga suite with licensed system files and extensive included content.8.9
Denise vs the competition
- Denise vs Amiberry
- Denise vs Copperline
- Denise vs Amiga Forever
- Denise vs FS-UAE
- Denise vs Amigo — Amiga Emulator
- Denise vs UAE4ARM
Compare Denise with any tool side by side →
Also Ranked In
Denise is ranked in 2 of our directories.
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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