#12 in CMS & PublishingUpdated 2026-08

LibreTranslate

by LibreTranslate · Self-hosted open source machine translation API

54.6 — BenchRank score out of 100

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Overview

LibreTranslate is an open source machine translation API that translates text and files between roughly 50 languages, with an auto-detect option for the source language. Requests POST a JSON body with source, target, format and an optional alternatives count to a /translate endpoint. It can be downloaded and run as your own server, and is powered by Argos Translate.

Best for: Developers who want a self-hosted, offline-capable machine translation API.
Pricing: No prices are shown; the page states the software is free to download and open source under AGPLv3, while the hosted API asks for an API key.
Runs on: Self-hosted

Strengths and trade-offs

Strengths

Free to download and run as your own API server
Stated as offline capable once self-hosted
Open source under AGPLv3
Around 50 languages, with auto source detection

Trade-offs

AGPLv3 copyleft may not suit closed-source products
Hosted translate box caps input at 2,000 characters
Hosted API requires an API key; no pricing shown

How this score is made up

Each dimension is scored out of 100 and combined into the headline score using fixed weights.

MCP support: 60 out of 100
API quality: 40 out of 100
Documentation: 80 out of 100
Agent friendliness: 32 out of 100
Changelog: 80 out of 100
Marketing site structure: 55 out of 100
Operational trust: 25 out of 100

Measured, but not part of the score

Useful to know, but not a mark for or against the product — so these do not affect the ranking.

Openness: 65 out of 100
Maintenance: 100 out of 100

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