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Head to head · Translate text · October 2026 research run

Crowdin vs Phrase

Crowdin scores 69.6 (B) on agent readiness against Phrase's 64.2 (B), and leads in 3 of 7 scored categories. Phrase leads on schema & documentation. Both do translate text.

CrowdinCrowdin OÜ · HTTP API B69.6/100#153 of 722 PhrasePhrase a.s. · HTTP API B64.2/100#285 of 722

Which one, for what

Crowdin B

Good for Teams that keep product strings and files in Crowdin and want an agent to upload sources, check progress, apply pre-translation, manage glossaries and pull builds.

Ahead on

  • Reliability, 78 against 55
  • Security & auth, 68 against 58
  • Transparency & trust, 79 against 74

Watch for

The terms forbid accessing the service to monitor availability, performance or functionality, or for benchmarking, without Crowdin's prior written consent

Phrase B

Good for Teams that keep translation projects, term bases and translation memories in Phrase and want an agent to run them, or to translate through engines chosen per language pair.

Ahead on

  • Schema & documentation, 87 against 80

Also in its favour

  • Free to start without a card

Watch for

status.phrase.com lists 14 incidents between 10 July and 8 October 2026, two marked critical and ten major, most confined to one component

Score by category

CategoryWeight this runCrowdinPhraseEdge
Reliability16%207855Crowdin +23
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28087Phrase +7
Agent ergonomics13%16.26970Phrase +1
Security & auth14%17.56858Crowdin +10
Payments & pricing10%12.53030even
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.88283Phrase +1
Transparency & trust7%8.87974Crowdin +5
Negative events≤1500
Total69.6 · B64.2 · B

Facts side by side

FactCrowdinPhrase
KindHTTP APIHTTP API
VendorCrowdin OÜPhrase a.s.
Hosted endpointhttps://api.crowdin.com/api/v2https://mcp.eu.phrase.com
TransportsHTTP, Streamable HTTPHTTP, Streamable HTTP
AuthOAuth or keyOAuth or key
PricingFreemiumPaid
x402nono
LicenceProprietary service under Crowdin's terms. The CLI and the official API clients are MITProprietary service under the Phrase Terms of Service. The CLI, the Strings API clients and the deprecated local MCP server on GitHub are MIT
Read-only variant documentedyesno
llms.txtyesyes
MCP registrynot listedio.github.phrase/mcp
Last release2026-09-302026-10-06
Terms last updated2026-09-24no date given
Privacy policy last updated2026-09-242026-10-06
Customer content may train modelsnot found in the textyes
Terms restrict automated accessyesnot found in the text
Terms restrict benchmarkingyesyes
Terms or service can change without noticeyesnot found in the text
Arbitration or class-action waiveryesnot found in the text
Popularity320 stars, 264k npm/wk, 14k PyPI/wk49 stars, 40k npm/wk, 14k PyPI/wk

Verdicts

Crowdin

The REST API has a public OpenAPI document with 374 operations, and tokens can be limited by scope, access level and project. Translation runs inside Crowdin projects and connected engines, so it is not a stateless per-character translation API. No Retry-After guidance, idempotency keys or SLA were found in the reviewed documentation.

Phrase

Nine APIs with public OpenAPI specs, Markdown docs and a hosted MCP server that signs in with OAuth and separates view, create and delete consents. The status page lists 14 incidents in 90 days, 12 marked major or critical. Capacity top-up prices aren't public, and the terms permit training some models on customer content and prohibit benchmarking.

Before you call either

Crowdin

  1. Send Authorization: Bearer <token> to https://api.crowdin.com/api/v2. Crowdin Enterprise uses https://<organization_domain>.api.crowdin.com/api/v2
  2. Use the MCP V2 endpoint https://mcp.crowdin.com/v2/mcp and set crowdin-tool-sets, because the server loads all 33 tool sets by default
  3. Set crowdin-read-only: true on the MCP connection for exploration. It exposes only list and get tools
  4. Keep to 20 concurrent requests an account across all tokens, and add your own backoff on 429
  5. Upload a file to /storages first, then pass the storageId to the add-file call. Builds, exports and reports are asynchronous and need a status poll
  6. /mts/{mtId}/translations takes at most 100 strings a call and needs the mt scope and a configured engine

Phrase

  1. Exchange a Phrase Platform API token at https://eu.phrase.com/idm/oauth/token (or us.phrase.com) for a Bearer JWT, which lasts about four hours, and refresh it before it expires
  2. Send a User-Agent header naming your application on every Strings and TMS call. The Strings API answers 400 without one
  3. Keep Strings calls under 1,000 in five minutes and four in parallel, and read X-Rate-Limit-Reset and X-Rate-Limit-Reason on a 429
  4. Send at most six texts of 2,000 characters to /v2/textTranslations, with consumerId and targetLang. Term bases and translation memories work only with an AI translation agent profile
  5. Use the MCP URL for the account's region, https://mcp.eu.phrase.com or https://mcp.us.phrase.com, and ask the user for the view consent alone unless the task writes

Questions

Which is better for AI agents, Crowdin or Phrase?

Crowdin scores 69.6 (B) on agent readiness against Phrase's 64.2 (B), and leads in 3 of 7 scored categories. Phrase leads on schema & documentation.

Do Crowdin and Phrase need an API key?

Both take an API key or an OAuth sign-in.

Can an agent call Crowdin and Phrase without installing anything?

Yes. Crowdin has a hosted endpoint at https://api.crowdin.com/api/v2 and Phrase at https://mcp.eu.phrase.com.

Other comparisons with Crowdin or Phrase

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