Name Author Version Competition categories Description
agiannis_image Konstantinos Agiannis Test 2, rapid Color Transform + Predictor + Bit Shuffling + FSE
agiannis_text Konstantinos Agiannis Test 1, rapid Block Sorting + RLE + FPC
archbox Andrei 1.0 Test 1, rapid
Test 2, rapid
Test 3, rapid
babylz Sergey Melnikov Test 4, rapid Simple fast LZ-type compression with my improvement
BCM Ilya Muravyov 2.00 alpha 3 Test 1, balanced
Test 2, balanced
Test 3, balanced
BWT with Context Mixing
BMF Dmitry Shkarin 2.01 Test 2, balanced
Test 2, hcr
Standard image compression scheme, prediction + error context modeling
BWIC Ziya Arnavut Test 1, hcr
Test 2, hcr
Test 3, hcr
BWIC utilizes BWT, Inversion Coder, RLE0 and a Arithmetic Coder
DURILCA Dmitry Shkarin 0.5 Test 1, hcr PPMonstr + preprocessing
DURILCA’base Dmitry Shkarin 0.5 Test 3, hcr PPMonstr + preprocessing
DURILCA’light Dmitry Shkarin 0.5 Test 1, balanced PPMd + preprocessing
EMMA Marcio Pais Test 2, hcr
guess Sergei Soldatov Test 2, rapid
HALIC-Balanced Hakan Abbas 0.4 Test 2, balanced Only one “Adaptive Estimator” and “Rice Encoder”
HALIC-Rapid Hakan Abbas 1.0b Test 2, rapid Only one “Adaptive Estimator” and “Rice Encoder”
hlx Andreas Debski Test 2, rapid
hrcm Konstantin Zaborskikh Test 4, hcr Context mixing algorithms
k5 Frederic Langlet 0.3 Test 1, rapid
Test 1, balanced
Test 1, hcr
Test 2, rapid
Test 2, balanced
Test 3, rapid
Test 3, balanced
Test 3, hcr
Test 4, rapid
Test 4, balanced
Test 4, hcr
KATY Marcio Pais Test 3, balanced
KharBlock David Kharabadze Test 4, rapid Dynamic Huffman coding
Kvick Andreas Debski Test 2, rapid Linear prediction based on a block-wise LSM(OLS)-optimized prediction model + ANS coding
lac Qian Yijia Test 1, balanced
LEA Marcio Pais Test 2, balanced
LILY Marcio Pais Test 3, hcr
LUA Marcio Pais Test 1, hcr
LUNA Marcio Pais Test 4, balanced
LZNV Sebastian.LUPANE 2.9207 Test 1, rapid
Test 1, balanced
Test 2, rapid
Test 2, balanced
Test 3, rapid
Test 3, balanced
LZFG + Advanced Static Huffman Coding
LZPM Ilya Muravyov 0.18 Test 1, hcr
Test 2, balanced
Test 3, hcr
LZ77 with Arithmetic (Range) encoding and Optimal Parsing
lzuf2 Gerald R. Tamayo Test 1, balanced
Test 2, balanced
Test 3, balanced
MCM Mathieu Chartier 0.85 Test 1, balanced
Test 1, hcr
Test 3, balanced
Test 3, hcr
LZP and CM + Dict/X86 filter + Alphabet reorder with different CM models for text vs binary data
Nakamichi ‘Dragoneye’ Georgi Marinov a.k.a. Sanmayce 2020-jul-20 Test 1, hcr LZSS with 1TB sliding window, greedy parsing, no entropy coding.
NINO Marcio Pais Test 4, hcr
Orz Zhang Li 1.6.2 Test 1, balanced
pgcm Peter Thamm 4 Test 1, balanced
Test 3, balanced
Test 4, balanced
WRT + CM
filter + CM
dictionary coder, CM
pglz Peter Thamm 3 Test 1, rapid
Test 2, rapid
Test 3, rapid
Test 4, rapid
WRT + entropy coding
linear transform + entropy coding
filter + LZ
pglz/zstd hybrid with data detection and preprocessing
PPMd Dmitry Shkarin mod. var. J, oct 16 2020 Test 1, balanced
Test 3, balanced
Test 4, balanced
PPM with Information Inheritance
PPMonstr Dmitry Shkarin mod. var. J, oct 16 2020 Test 1, hcr
Test 3, hcr
Test 4, hcr
Complicated version of PPMd, PPMd + SSE/TSE
sgcm Peter Thamm 2 Test 1, hcr
Test 3, hcr
Test 4, hcr
WRT + CM
filter + CM
dictionary coder, CM
SIMD_ZPAQ Jiabing Fu Test 3, hcr
tarcm Konstantin Zaborskikh Test 3, hcr Context mixing+Deduplication+Delta Coding
TBCM Uwe Baier Test 1, balanced
Test 2, balanced
Test 3, hcr
BWT Compression with Tunneling
ULZ Ilya Muravyov Test 4, rapid LZSS with Golomb Codes

Reference compressors

Name Version Competition categories
Zstd 1.4.5 Test 1, rapid
Test 1, balanced
Test 1, hcr
Test 3, rapid
Test 3, balanced
Test 4, rapid
Test 4, balanced
Test 4, hcr
brotli 1.0.0 Test 1, rapid
Test 3, rapid
zlib 1.2.11 Test 4, rapid
Test 4, balanced
Test 4, hcr
GLZA 0.11.3 Test 1, hcr
gzip_libdeflate 1.6 Test 1, rapid
Test 2, rapid
Test 3, rapid
nanozip 0.09 Test 1, rapid
Test 2, hcr
Test 3, rapid
MCM 0.84 Test 1, balanced
Test 1, hcr
PPMd var. J, may 10 2006 Test 1, balanced
Test 3, balanced
Bzip2 1.0.8, 13-jul-2019 Test 1, balanced
Test 3, balanced
PPMonstr var. J, feb 16 2006 Test 1, hcr
Test 3, hcr
drt | lpaq9m Feb. 20, 2009 Test 1, hcr
ZPAQ 7.15, aug 17 2016 Test 1, hcr
Test 3, hcr
Test 4, balanced
Test 4, hcr
QLIC2 ver. 2 Test 2, rapid
IZ 0.1 Test 2, rapid
zcm 0.93 Test 2, balanced
Test 2, hcr
JPEG-LS 1 Test 2, balanced
JPEG XL 0.1.0 Test 2, balanced
Test 2, hcr
PIK May 29, 2019 Test 2, balanced
lz4 1.9.3 Test 4, rapid