LibreTranslate vs OPUS-MT (Marian NMT)
Self-host pick — both replace DeepL (Machine translation API).
Both LibreTranslate and OPUS-MT (Marian NMT) self-host as a replacement for DeepL (Machine translation API). Pick LibreTranslate if you want the lighter footprint — 10min docker run (model downloads on first start), $10-30/mo vps — cpu-only works for low traffic; gpu recommended above 100 req/min. Pick OPUS-MT (Marian NMT) if you need research, low-resource language pairs, and teams that want to fine-tune translation models for a specific domain — 30min — pull Marian + a model from Hugging Face and $15-50/mo vps — marian is c++ and fast, but gpu helps for throughput.
| LibreTranslateopen-source | OPUS-MT (Marian NMT)open-source | |
|---|---|---|
| License | AGPL-3.0 | MIT |
| Setup time | 10min docker run (model downloads on first start) | 30min — pull Marian + a model from Hugging Face |
| Monthly cost | $10-30/mo VPS — CPU-only works for low traffic; GPU recommended above 100 req/min. | $15-50/mo VPS — Marian is C++ and fast, but GPU helps for throughput. |
| GitHub | LibreTranslate/LibreTranslate | Helsinki-NLP/Opus-MT |
| Replaces | DeepL | DeepL |
Good fit for
LibreTranslate
Web apps that want a self-hosted translation API for user content (UGC translation, support ticket I18n).
Weak at:Quality on rare pairs (EN ↔ Slavic, EN ↔ Asian) is below DeepL; for high-stakes translation this still matters.
OPUS-MT (Marian NMT)
Research, low-resource language pairs, and teams that want to fine-tune translation models for a specific domain.
Weak at:Bring your own service layer; quality varies by pair (well-resourced pairs are excellent, others vary).
In a terminal? npx -y github:SolvoHQ/os-alt-cli deepl prints DeepL's self-host options including both —
how the CLI works →
FAQ
Which is easier to self-host, LibreTranslate or OPUS-MT (Marian NMT)?
LibreTranslate: 10min docker run (model downloads on first start). OPUS-MT (Marian NMT): 30min — pull Marian + a model from Hugging Face.
What does each cost to run?
LibreTranslate: $10-30/mo VPS — CPU-only works for low traffic; GPU recommended above 100 req/min.. OPUS-MT (Marian NMT): $15-50/mo VPS — Marian is C++ and fast, but GPU helps for throughput.. Both projects are free and open source.
Do LibreTranslate and OPUS-MT (Marian NMT) replace the same SaaS?
Yes — both are open-source alternatives to DeepL.