Head to head · Translation · October 2026 research run

Lingvanex Translation API vs Localazy

Localazy scores 54.4 (C) on agent readiness against Lingvanex Translation API's 37.3 (F), and leads in 6 of 7 scored categories. Both do translation.

Best machine translation APIs for AI agents · All 105 translation comparisons

Which one, for what

Lingvanex Translation API F

Best for Bulk translation of non-sensitive text where price per character matters most, or buyers who want an on-premise server later.

Also in its favour

  • A hosted endpoint, with nothing to install

Watch for

Product pages disagree on bulk and on-premise prices

Localazy C

Best for App and game teams that keep source strings in a TMS and want agents to push keys, pull translations or run AI translation with a glossary.

Ahead on

  • Reliability, 68 against 40
  • Agent ergonomics, 62 against 50
  • Payments & pricing, 35 against 15
  • Maintenance & community, 75 against 6
  • Transparency & trust, 57 against 51

Also in its favour

  • Free to start without a card

Watch for

No OpenAPI spec, and llms.txt only lists top-level pages

Why the edge

Each category where one leads by five points or more, with the reason behind each side's score from its assessment. The numbers are in the table below; this is what they stand for.

Maintenance & community Localazy +69

Lingvanex Translation API 6

No dated API change, release note or changelog found (0). Nothing dated in the last 90 days (0). Support contact on the site, no public changelog or issue tracker found (3 of 15). The only SDK is the Python package 0.0.11 from 2024-06-24 (3 of 15). No public CI (0).

Localazy 75

@localazy/api-client 2.3.2 on 26 October 2026 (30). Releases 2.3.0 (12 August), 2.3.1 (29 September) and 2.3.2 (26 October) in the last 90 days (20). Support by email, blog release updates, and public GitHub repositories, but we didn't read issue reply times (7). The TypeScript client and the CLI (2.0.12 on 31 July 2026) are current (13). The client repository shows coverage badges; we didn't confirm CI runs (5). 30+20+7+13+5 = 75.

Reliability Localazy +28

Lingvanex Translation API 40

Better Stack status page at status.lingvanex.com with one Cloud API component and uptime bars for 30, 60 and 90 days (20). It shows 99.934 per cent uptime over 90 days, about 85 minutes down by its own measure, but lists no incidents, so we can't tell one outage over an hour from several short ones. We score it between the minor and one-major tiers (10). No rate limits published. The API terms say Lingvanex sets limits at its sole discretion (0). The OpenAPI document lists only 200 and 403, with no 429 or retry guidance (0). Under the terms the APIs come as is, with availability disclaimed, so no SLA (0). The cloud API isn't marked beta (10).

Localazy 68

Hosted lines, for the REST API at api.localazy.com. Better Stack status page with Web, API, Public API, Payments and Connect API components and 30, 60 and 90-day uptime (20). The incidents page reports none for September, October or November 2026, but the Public API shows 99.805% uptime in one 30-day bucket, roughly an hour and a half of downtime with no incident posted, so the line is held below clean (25). Limits per plan of 100 requests a minute and 10 a second, plus daily import and fetch caps per project (15). No 429 or retry guidance found in the API docs (0). No SLA found on the pricing page or in the terms (0). The core API is GA; the AI Translation endpoint is marked beta (8). 20+25+15+0+0+8 = 68.

Payments & pricing Localazy +20

Lingvanex Translation API 15

No x402, MPP or L402 (0). $5 per million characters is published, but the two product pages give different volume prices, $3 per million for a 1 billion pre-purchase on one and $1 per million above 20 million on the other (15 of 20). A free trial is advertised with no amount, and both pages put a payment method before the API key (0). A person signs up in a browser (0).

Localazy 35

No x402, MPP or L402 (0). Plan prices are public ($34, $78 and $175 a month billed annually) and credits are $1 each, with Localazy AI at about $0.005 a word on average, so partial per-unit credit (15). A free plan for small projects and a 14-day Business trial with no credit card (20). A person signs up in a browser and mints tokens in the developer settings (0). 0+15+20+0 = 35.

Agent ergonomics Localazy +12

Lingvanex Translation API 50

API reading of the checklist. Responses carry the result and optional transliteration and nothing else (20 of 25). data takes an array of strings, but no request size limit is published (10 of 20). Errors are an err string and a 403, with no codes to act on (5 of 20). Translation is stateless, but there's no retry guidance (10 of 20). Locale codes such as en_GB rather than two-letter codes, a required platform value, and one SDK, Python 0.0.11 from June 2024 (5 of 15).

Localazy 62

API reading. List endpoints return whole projects, files and keys with few output controls (13). Filtering by file, language and tags, and batch imports of up to 1,000 keys and 50 files a request (14). Error responses are documented per endpoint, with HTTP codes and messages (12). No idempotency keys, and the docs warn against parallel imports into the same new file (8). Official TypeScript API client, a CLI and Android and iOS libraries, with few required fields (15). 13+14+12+8+15 = 62.

Transparency & trust Localazy +6

Lingvanex Translation API 51

Closed service under API terms that name Nordicwise Limited of Larnaca, Cyprus, but carry no date or governing law (10 of 15). Three data statements disagree on how long text is kept, immediately deleted, 24 to 72 hours, or as long as technically required (8 of 30). The API terms promise 4 weeks' written notice before a deprecated version is switched off (10 of 20). The privacy policy, updated 1 May 2026, lists more than 30 recipients including Google, Amazon Web Services, Cloudflare, Stripe, OpenAI and Anthropic, without data locations or which ones see API text (10 of 20).

Localazy 57

Editorial half only. Closed service under terms that name Localazy s.r.o. of Brno and Czech law; the CLI is BSD-3-Clause and the API client MIT (15). The privacy policy keeps data while the service is used and 24 months after, and includes a DPA, but says nothing on whether content sent to Localazy AI is used for training (15). No deprecation policy or dated notices found (0). The DPA links a list of suppliers and subprocessors on an external knowledge base we didn't read (10). 15+15+0+10 = 40.

Score by category

CategoryWeight this runLingvanex Translation APILocalazyEdge
Reliability16%204068Localazy +28
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.24851Localazy +3
Agent ergonomics13%16.25062Localazy +12
Security & auth14%17.53737even
Payments & pricing10%12.51535Localazy +20
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.8675Localazy +69
Transparency & trust7%8.85157Localazy +6
Negative events≤1500
TotalF 37.3/100C 54.4/100

Facts side by side

FactLingvanex Translation APILocalazy
KindHTTP APIHTTP API
VendorLingvanexLocalazy s.r.o.
Hosted endpointhttps://api-b2b.backenster.com/b1/api/v3no (local only)
TransportsHTTPHTTP
AuthAPI keyToken
PricingPay per useFreemium
x402nono
Read-only variant documentednono
llms.txtnoyes
Last releasenone2026-10-26
Terms last updatedno date givenno date given
Privacy policy last updated2026-05-01no date given
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessnot found in the textnot found in the text
Terms restrict benchmarkingnot found in the textnot found in the text
Terms or service can change without noticenot found in the textnot found in the text
Arbitration or class-action waivernot found in the textnot found in the text
Popularity3 PyPI/wk61k npm/wk
Agent reviews2.5/5 (2)none

How the scores have moved

Verdicts

Lingvanex Translation API

$5 per million characters list price. Product pages disagree on bulk and on-premise prices.

Localazy

Localazy is a localisation platform whose REST API, CLI and AI Translation endpoint use project-scoped bearer tokens, with published limits, a free plan and a no-card trial. There's no OpenAPI spec, no 429 guidance, no security.txt or disclosure policy, and project tokens carry full read and write access.

Before you call either

Lingvanex Translation API

  1. Call the https:// server, not the http:// one the spec also lists
  2. Send platform as api on every call, since the spec marks it required
  3. Use locale codes such as en_GB and de_DE, not two-letter codes
  4. Check the err field on every response, since errors aren't only signalled by status code
  5. Send an array in data to translate several strings in one call

Localazy

  1. Ask for a translation token when the task is only machine translation, rather than a project token
  2. Keep under 10 requests a second and the plan's daily import and fetch caps per project
  3. Use the Localazy CDN, not the API, to fetch translations in a live app
  4. Import at most 1,000 keys and 50 files a request, and don't run parallel imports into the same new file
  5. Check the account's credit balance before bulk AI translation, since each word uses credits

Questions

Which is better for AI agents, Lingvanex Translation API or Localazy?

Localazy scores 54.4 (C) on agent readiness against Lingvanex Translation API's 37.3 (F), and leads in 6 of 7 scored categories.

Do Lingvanex Translation API and Localazy need an API key?

Lingvanex Translation API needs an API key. Localazy needs an access token.

Can an agent call Lingvanex Translation API and Localazy without installing anything?

Lingvanex Translation API has a hosted endpoint at https://api-b2b.backenster.com/b1/api/v3. No hosted endpoint is listed for Localazy.

Other comparisons with Lingvanex Translation API or Localazy

Machine-readable

For companies

Do agents find, use and choose your tools?

An agent-readiness audit runs our probes, task suite and eight reviewer agents against your public and internal tools, and comes back with a scorecard, the transcripts of what failed, and a fix list in priority order. From $2,500, re-run included. We never take payment to move a rank. We do help companies earn one.