Crates / lettre / Alternatives
Rust crate alternatives · data Oct 27, 2026
Alternatives to lettre
Short answerThe closest alternatives to lettre on crates.io data are resend-rs (4.1K real downloads a day), postmark (133 real downloads a day), crossbeam-channel (1.6M real downloads a day). Of the 8 we list, the most used is bytes, and 8 shipped a release in the last year. lettre itself gets 89,482 a day with 494 dependents.
Every alternative we found
| Alternative | Real downloads a day | vs lettre | Dependents | Last release | Why it is listed | |
|---|---|---|---|---|---|---|
| resend-rs Pulled in | 4,094 | 0.05x | 8 | 9d | category Email, keyword "email" | compare |
| postmark Pulled in | 133 | 0.00x | 1 | 5mo | category Email, keyword "email" | compare |
| crossbeam-channel Widely used | 1,564,625 | 17.49x | 2,767 | 49d | keyword "message" | compare |
| sendgrid Pulled in | 1,719 | 0.02x | 6 | 33d | keyword "email" | compare |
| mailgun-rs Pulled in | 60 | 0.00x | 0 | 9mo | keyword "email" | compare |
| bytes Foundational | 3,424,140 | 38.27x | 17,656 | 4mo | category Network programming | compare |
| rustix Widely used | 3,390,892 | 37.89x | 1,684 | 38d | category Network programming | compare |
| hyper Widely used | 2,783,528 | 31.11x | 5,861 | 18d | category Network programming | compare |
How to choose
- Same job, not the same API. Each line is listed because it shares a crates.io category or keyword with lettre; 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 lettre: 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 lettre, 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 27, 2026. Built when we find 3 or more.
Up next
The closest alternative: Few direct dependents and losing ground. 4,094 real downloads a day.resend-rsRust crate. Resend's Official Rust SDK. Real use: 4.1K downloads a day on quiet days; 8 crates depend on it.Read it next →Also worth your time
Art: Nicholas Roerich, Nag Lake (1925). Public domain, via Wikimedia Commons.
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