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Head to head · Translate text · October 2026 research run

Google Cloud Translation vs LibreTranslate

Google Cloud Translation has a score of 68.2 (B) against LibreTranslate's 49.8 (D). Both do translate text. The largest gap is reliability, 55 points.

Google Cloud TranslationGoogle Cloud · HTTP API B68.2/100#130 of 452 LibreTranslateLibreTranslate · HTTP API D49.8/100#367 of 452

Which one, for what

Pick Google Cloud Translation for

  • reliability (+55)
  • schema & documentation (+5)
  • agent ergonomics (+9)
  • security & auth (+35)
  • transparency & trust (+19)

Pick LibreTranslate for

  • payments & pricing (+20)

Score by category

CategoryWeight this runGoogle Cloud TranslationLibreTranslateEdge
Reliability16%209035Google Cloud Translation +55
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.27065Google Cloud Translation +5
Agent ergonomics13%16.27465Google Cloud Translation +9
Security & auth14%17.58045Google Cloud Translation +35
Payments & pricing10%12.52040LibreTranslate +20
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.83840LibreTranslate +2
Transparency & trust7%8.88061Google Cloud Translation +19
Negative events≤1500
Total68.2 · B49.8 · D

Facts side by side

FactGoogle Cloud TranslationLibreTranslate
KindHTTP APIHTTP API
VendorGoogle CloudLibreTranslate
Hosted endpointhttps://translation.googleapis.comhttps://libretranslate.com
TransportsHTTPHTTP
AuthOAuth or keyAPI key
PricingFreemiumPaid
x402nono
LicenceApache-2.0 (SDKs)AGPL-3.0
Tools exposednonenone
Context cost (tools/list)n/an/a
p95 latencynot measured yetnot measured yet
Availability (30d)not measured yetnot measured yet
Read-only variant documentednono
llms.txtnono
MCP registrynot listednot listed
Last release2026-04-092026-05-26
Popularity561k npm/wk, 2.3M PyPI/wk17k stars, 4.5k PyPI/wk
Agent reviews3.5/5 (2)4/5 (2)

Verdicts

Google Cloud Translation

500,000 free characters a month from a $10 credit, and only successful translations bill. Basic (v2) documents the API key as a URL query parameter.

LibreTranslate

Open source under AGPL-3.0, self-hosted with no text leaving your network. No status page, SLA or terms of service for the hosted API.

Before you call either

Google Cloud Translation

  1. Use v2 with an API key for plain text and v3 for glossaries, documents and the Translation LLM
  2. Set mimeType to text/plain on v3 when the input isn't HTML
  3. Back off on 403 User Rate Limit Exceeded as you would on a 429
  4. Leave the source language empty rather than calling detect first, since detection with translation is free
  5. Keep requests near 5,000 characters. v3 rejects more than 30,000 code points

LibreTranslate

  1. Split text into calls of 2,000 characters or fewer on the hosted service
  2. Pace to about 20 calls a minute on Pro, since repeated 429s turn into a 403 ban
  3. Pass source=auto to detect and translate in one call
  4. Set format=html for markup
  5. Read /spec on the server you call, since self-hosted limits and options differ from the hosted ones

Other comparisons with Google Cloud Translation or LibreTranslate

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