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LibreTranslate vs DeepL

Self-host swap-in for DeepL. · Self-host DeepL · LibreTranslate on os-alt

LibreTranslate is one of the open-source self-host replacements for DeepL — license AGPL-3.0, 10min docker run (model downloads on first start) to stand up, and $10-30/mo vps — cpu-only works for low traffic; gpu recommended above 100 req/min. Compare against DeepL's Free 500k chars/mo; Starter $8.74/user/mo; Advanced $28.74/user/mo; Pro $57.49/user/mo below.

LibreTranslateopen-sourceDeepLpaid SaaS
CategoryMachine translation APIMachine translation API
License / pricingAGPL-3.0Free 500k chars/mo; Starter $8.74/user/mo; Advanced $28.74/user/mo; Pro $57.49/user/mo
Starting price$0 self-host$8.74/user/mo
GitHubLibreTranslate/LibreTranslate ★ 14.4k · last commit 8d agoaliveclosed source
Setup time10min docker run (model downloads on first start)SaaS — sign up + bill
Monthly cost$10-30/mo VPS — CPU-only works for low traffic; GPU recommended above 100 req/min.from $8.74/user/mo (Free 500k chars/mo; Starter $8.74/user/mo; Advanced $28.74/user/mo; Pro $57.49/user/mo)

Switching from DeepL to LibreTranslate

`docker run -ti --rm -p 5000:5000 libretranslate/libretranslate --load-only en,de,fr,es`. Models (Argos OpenNMT) download on first start; subsequent runs use the cached models. The HTTP API is DeepL-compatible-ish — most clients only need to swap the base URL: `POST /translate {q, source, target, format}`. For DeepL parity at scale, deploy the Argos packages on a GPU box with batch translation.

Good fit for
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.

Other open-source self-host alternatives to DeepL

  • Argos Translate
    MIT5min `pip install argostranslate` + download models$0 on a workstation; ~$10/mo for a small VPS for batch jobs.
  • OPUS-MT (Marian NMT)
    MIT30min — pull Marian + a model from Hugging Face$15-50/mo VPS — Marian is C++ and fast, but GPU helps for throughput.

In a terminal? npx os-alt deepl prints DeepL's self-host options — how the CLI works →

FAQ

Is LibreTranslate a free alternative to DeepL?

Yes — LibreTranslate is open source under AGPL-3.0. Self-host cost: $10-30/mo VPS — CPU-only works for low traffic; GPU recommended above 100 req/min.. DeepL starts at $8.74/user/mo (Free 500k chars/mo; Starter $8.74/user/mo; Advanced $28.74/user/mo; Pro $57.49/user/mo).

How long does LibreTranslate take to set up vs DeepL?

Self-hosting LibreTranslate: 10min docker run (model downloads on first start). DeepL is a hosted SaaS — sign up and you're in.

What is LibreTranslate good at, and what is it weak at?

Good fit for: 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..