More size reduction than the tools you know — and unlike most of them, every byte stays instantly readable with a byte-exact restore.
Higher is better — percentage of the original file size removed. Representative figures for sequencing data (FASTQ / BAM).
| Tool | Compression ratio | Size reduction | Remaining size | gene.zip is… | Instant random access | Byte-exact restore |
|---|---|---|---|---|---|---|
| gzip | 3.3× | 70% | 30% of original | 73% smaller | No | Yes |
| CRAM | 5.0× | 80% | 20% of original | 60% smaller | Region slices | Yes (lossless mode) |
| PetaGene | 6.7× | 85% | 15% of original | 47% smaller | Yes | Yes |
| SPRING | 7.7× | 87% | 13% of original | 38% smaller | No (full decompress) | Yes (lossless mode) |
| gene.zipBest | 12.5× | 92% | 8% of original | — | Yes — millisecond pulls | Yes — verified on every restore |
“gene.zip is X% smaller” compares the compressed output sizes: e.g. vs gzip, gene.zip's 8% footprint is 73% smaller than gzip's 30%. Figures are representative for sequencing data (FASTQ / BAM) and vary by dataset, depth and quality model — specialist genomic tools beat gzip by a wide margin, and gene.zip beats them while keeping data instantly queryable. We confirm your actual numbers with a free pilot that compresses a sample of your own archive and verifies a byte-exact restore before you commit.