Crates / memmap2 / Alternatives
Rust crate alternatives · data Oct 24, 2026
Alternatives to memmap2
Short answerThe closest alternatives to memmap2 on crates.io data are socket2 (4M real downloads a day), bytes (3.4M real downloads a day), rustix (3.4M real downloads a day). Of the 8 we list, the most used is socket2, and 7 shipped a release in the last year. memmap2 itself gets 1,039,105 a day with 2,487 dependents.
Every alternative we found
| Alternative | Real downloads a day | vs memmap2 | Dependents | Last release | Why it is listed | |
|---|---|---|---|---|---|---|
| socket2 Widely used | 4,034,112 | 3.88x | 1,539 | 3mo | keyword "io" | side by side |
| bytes Foundational | 3,424,140 | 3.30x | 17,656 | 4mo | keyword "io" | compare |
| rustix Widely used | 3,390,892 | 3.26x | 1,684 | 38d | keyword "file" | compare |
| mio Established | 3,332,252 | 3.21x | 624 | 21d | keyword "io" | compare |
| tokio Foundational | 3,098,313 | 2.98x | 78,796 | 3d | keyword "io" | compare |
| tower Widely used | 2,342,590 | 2.25x | 5,816 | 9mo | keyword "io" | compare |
| tower-http Widely used | 2,044,149 | 1.97x | 3,782 | 54d | keyword "io" | compare |
| same-file Established | 1,902,047 | 1.83x | 290 | 6.8y | keyword "file" | compare |
How to choose
- Same job, not the same API. Each line is listed because it shares a crates.io category or keyword with memmap2; read its description before you swap.
- More dependents means more answered questions and a smaller chance it disappears.
- Check the last release against how fast you need fixes. For memmap2: is it still maintained?
Rules
Alternatives = tracked crates (top 1000 by downloads) that share a specific crates.io category (2 points each) or keyword (3 points each) with memmap2, most similar first; its own parts (same name prefix) and crates it depends on or that depend on it are left out, because those are companions, not substitutes. Real downloads = quiet-day median, crates.io data Oct 24, 2026. Built when we find 3 or more.
Up next
The closest alternative: Widely used and losing ground. 4,034,112 real downloads a day.socket2Rust crate. Utilities for handling networking sockets with a maximal amount of configuration possible intended. Real use: 4M downloads a day on quiet days; 1,539 crates...Read it next →Also worth your time