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Translation & Localization

SimpleLocalize

EU-Made Report an error

Panel rating · 6 judges · How to read the stars

Category median

Sovereignty: not determined

0–5 in half steps. 5 means the rubric's top anchor is met on the evidence.

by Jakub Pomykała Software · simplelocalize.io

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SimpleLocalize: AI-assisted analysis on whats-best.ai SimpleLocalize: AI-assisted analysis on whats-best.ai (dark)

Add ?theme=dark to the image address for dark backgrounds. The badge shows the category and the month of the latest evaluation, and EU-Made where that is the product’s provenance. It never shows a score.

SimpleLocalize at a glance

Vendor
Jakub Pomykała Software
Headquarters
Not stated on the vendor’s pages as of 1 Nov 2026
Data hosting
Not stated on the vendor’s pages as of 1 Nov 2026
Free plan
Yes, per the vendor’s own page source, captured 1 Nov 2026
Panel verdict
The AI panel rates SimpleLocalize 3.5/5, the mean of 6 judges. SimpleLocalize, a translation-management service from Jakub Pomykała Software, a sole proprietorship in Wrocław, Poland, scored strongest on integrations and formats (7 to 9): a native CLI, a GitHub App that opens pull requests, over-the-air SDKs for Android, iOS and macOS, a REST API with an OpenAPI spec and thirty-plus file formats are documented. how scores are made
As of
Vendor pages captured 1 Nov 2026; evaluated by the panel 2 Nov 2026. all sources

SimpleLocalize alternatives, European ones first →

Read this page as one judge. Each weighs the same scores by what they care about.

The App Developer

Weighted verdict

Lead developer of a web app and two mobile apps at a Vienna start-up, with strings in JSON, xcstrings and Android XML. Has hand-merged translation files once and will not do it again. Wants a CLI and a GitHub sync that opens pull requests, over-the-air updates so a typo fix does not need an app store release, an API that does everything the interface does, and ideally an open-source edition they could run themselves if the vendor changes course.

Same scores as the panel view — this lens weights them the way this judge cares.

Scored by The App Developer

Panel median The App Developer This judge’s scores over the panel median. Each label opens its reasoning below.
Scores per criterion, in stars out of 5
Criterion Panel median The App Developer
Machine translation & AI quality 3 of 5 3.5 of 5
Translation memory, terminology & review workflow 3.5 of 5 3.5 of 5
Integrations, file formats & developer tools 4 of 5 4.5 of 5
Confidentiality of translated content 3 of 5 3.5 of 5
Data export, portability & self-hosting 2.5 of 5 2.5 of 5
European sovereignty 3.5 of 5 3.5 of 5
Pricing transparency 3.5 of 5 3.5 of 5

Machine translation & AI quality

How this is scored

What the machine translation does and how well it is controlled: the languages and language pairs covered, the engine (own neural or LLM model, or a choice of third-party engines such as DeepL, Google, Microsoft or an LLM), glossaries and formality applied during translation, document translation that keeps the layout (Word, PowerPoint, PDF, InDesign), custom or adaptive models trained on the customer's own translations, automatic quality estimation or scoring, and published evaluations of translation quality.

0 — No machine translation of any kind, and no way to connect an engine.

3 — Machine translation is offered or one engine can be connected; languages, glossary use and quality controls are basic or not described.

5 — Machine translation for the major European and world languages with the list published, glossaries applied during translation, a formality or tone setting, document translation that keeps formatting for common office formats, and either an own engine or a choice of several named engines.

8 — Custom or adaptive models that learn from the customer's translation memory or corrections, automatic quality estimation per segment with a threshold that routes weak segments to human review, LLM-based translation with style guides and context, engine selection per language pair stated, and a published quality evaluation with its method.

10 — Translation quality that an organisation can measure and steer: evaluations against named benchmarks or blind human review published with their method, quality estimation calibrated and explained, custom models with their training data and isolation documented, and every machine-translated segment traceable to the engine, model version and glossary that produced it.

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The App Developer

Auto-translation offers a real choice of named engines — DeepL, Google Translate, OpenAI, Anthropic, Gemini, OpenRouter and any custom OpenAI-compatible endpoint, including local models via Ollama — with the provider configurable per language, tone and project context sent along, DeepL glossaries applied, and placeholder and ICU exclusions. I found no public information on quality estimation per segment, adaptive models trained on my own corrections, or a published quality evaluation, and no document translation that keeps Word or PowerPoint layout. 3 11 12

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Translation memory, terminology & review workflow

How this is scored

How translation is managed as an ongoing process: translation memory with fuzzy matches, a termbase or glossary managed centrally, style guides, review and approval stages, automated QA checks (placeholders, tags, length, terminology, punctuation), an in-context or visual editor, screenshots and context for translators, tasks and deadlines, roles per language, and ordering or inviting human translators and agencies inside the product.

0 — No management of translations at all; text goes in and comes out with nothing stored or reviewed.

3 — Translations can be edited or a glossary kept; translation memory, review stages and QA checks are basic or not described.

5 — A translation memory reused across projects, a central glossary, at least one review or approval stage, automated QA checks for placeholders and terminology, comments and screenshots for context, and roles that limit translators to their languages.

8 — Configurable multi-step workflows with automation rules, an in-context or visual editor for apps or websites, QA checks configurable per project with blocking rules, style guides applied by the AI, translation memory and termbase shared across projects with penalties and priorities, vendor or agency management with ordering inside the product, and progress and cost reporting per language.

10 — A translation process an enterprise runs on: workflows per content type with conditional routing on quality scores, linguistic quality assessment with a named framework (MQM or similar), termbase with approval workflow and forbidden terms, full revision history per segment, and productivity and quality metrics per translator and vendor.

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The App Developer

Translation memory with 100% matches applied before any machine translation call, a glossary, four workflow stages with review and approval, QA checks for placeholders, HTML, ICU and length that can block publishing, tasks, snapshots and an in-context editor cover most of what my team would actually run on. I found no public information on ordering from translators or agencies inside the product, terminology-enforcing QA rules, or progress and cost reporting per language. 13 14 11

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Integrations, file formats & developer tools

How this is scored

How content gets in and out: the file formats supported (XLIFF, PO, JSON, YAML, Android XML, iOS strings and xcstrings, Office documents, InDesign), a REST API and CLI, SDKs and over-the-air updates for apps, Git repository sync (GitHub, GitLab, Bitbucket) and CI pipelines, connectors for CMS, shop and design tools (WordPress, Contentful, Shopify, Figma), browser and office add-ins, webhooks, and a JavaScript snippet or proxy for website translation.

0 — No documented way to get content in or out except typing or pasting by hand.

3 — File upload and download or a basic API; formats, repository sync and connectors are basic or not described.

5 — A documented REST API, a list of supported file formats covering the common software and document formats, sync with at least one Git host or CI, and connectors or plugins for several named CMS, shop or design tools.

8 — A CLI and SDKs for named platforms, over-the-air updates for mobile or web apps, Git sync with branching, webhooks, connectors for the main CMS, shop, design and support tools, office or browser add-ins, a public status page, and API limits documented.

10 — Integration that scales across an organisation: an API covering every function of the product with versioning and SDKs, an app or connector framework third parties build on, continuous localization in CI with pull requests opened automatically, and every connector documented with its limits and the fields it syncs.

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The App Developer

As a developer this is the best fit I have seen: a native CLI for upload, auto-translate, download and publish, a GitHub App that opens pull requests with translation updates, over-the-air SDKs so a typo fix ships to iOS, Android and macOS without a store release, a versioned REST API with an OpenAPI spec, webhooks, and the exact formats I use — xcstrings, Xcode catalogs, Android XML, PO, XLIFF, Excel — plus Figma, Shopify, Webflow, VS Code, IntelliJ and a status page. I found no public information on documented API rate limits or per-connector limits and synced fields. 2 16 15

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Confidentiality of translated content

How this is scored

What happens to the text a customer translates: whether source and target texts are stored and for how long, deletion after translation, whether customer content is used to train the vendor's or a third party's models, which machine translation and LLM providers a TMS sends text to and whether that can be restricted or switched off, encryption in transit and at rest, single sign-on, roles and audit logs, and certifications (ISO 27001, SOC 2) with their scope. Where the text is processed is scored under sovereignty.

0 — Customer texts are stored indefinitely and used for the vendor's own purposes, or no statement on data handling exists at all.

3 — The product is described as secure or GDPR-compliant and a privacy policy exists; retention of translated texts, model training and third-party engines are basic or not described.

5 — A documented statement that customer texts are not used to train models, retention or deletion of translated texts stated, the third-party engines or LLM providers named, encryption in transit and at rest, single sign-on on a business tier, and a data processing agreement offered.

8 — Texts deleted immediately after translation or after a retention period the customer sets, third-party AI processing switchable per project or account, zero-retention terms with the named LLM providers, audit logs, granular roles, ISO 27001 or SOC 2 certification stated with its scope, and a private or dedicated deployment option.

10 — Confidentiality that can be verified: an on-premise or customer-controlled deployment, customer-managed encryption keys, every subprocessor that sees content listed with its role, independent audit reports available, and every data flow of a translation request documented end to end.

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The App Developer

The subprocessor list names every engine the service can call and marks them optional and enabled only by the customer, a public data processing agreement is auto-accepted, data sits in AWS EU regions, deletion happens within 30 days of a request with export beforehand, and the hosting infrastructure is stated as compliant with ISO 27001 and SOC 2 Type II with SSO and role-based access on higher tiers. I found no public information on whether translated texts are used to train models, on zero-retention terms with the AI providers, or on encryption at rest beyond encrypted backups, and the company's own SOC 2 is described as readiness. 8 9 10 17

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Data export, portability & self-hosting

How this is scored

Whether translation assets stay the customer's and can leave with them: export of translation memory and termbase in open formats (TMX, TBX, XLIFF, CSV), export of all projects and files, import from another TMS, an API that can read every asset, the return or deletion of data on termination, open-source code and a self-hosted or on-premise edition.

0 — Translations cannot be exported; they exist only in the vendor's interface or engine.

3 — Translated files can be downloaded; export of translation memory and glossary, import and termination terms are basic or not described.

5 — Translation memory exportable as TMX and glossary as TBX or CSV, all project files downloadable, import of translation memory and glossaries from another tool, and an API that reads translations and keys.

8 — Complete export of every asset (memory, termbase, files, comments, history) in open formats, a documented migration path from named competitors, the data returned or deleted on termination under stated terms, and a self-hosted or on-premise edition with its own documentation.

10 — The customer owns the assets end to end: open-source code under a named licence that runs fully self-hosted with feature parity stated, a complete export another tool can import without loss, and the deletion of every copy on termination documented.

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The App Developer

Export works from the editor, the CLI and the API into many formats including Excel and JSON, translation memory can be imported from TMX with language mapping, and data is exportable before deletion with removal within 30 days. But I found no public information on exporting the translation memory or glossary themselves in open formats like TMX or TBX, which is exactly what I would need to switch tools without hand-merging files again. 18 19 14 9

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European sovereignty

How this is scored

Who the contracting entity and the parent company are, where texts are translated, stored and processed, and who the subprocessors are (hosting, machine translation engines, LLM providers, CDN for over-the-air delivery, support and payment tools). Independently sourced by the sovereignty pipeline; translated texts often hold personal data and trade secrets, so the whole chain counts, including the engines a TMS calls. A self-hosted edition the customer runs on its own European servers counts as the customer's chain, whatever the vendor's seat.

0 — Non-EU vendor and contracting entity, hosting unstated, subprocessors unnamed, and no data processing agreement offered.

3 — A privacy policy and a data processing agreement exist, but hosting location is unstated or non-EU and the subprocessors are not listed.

5 — EU hosting available and an EU contracting entity or EU representative, but parts of the chain (machine translation or LLM providers, CDN, support, payment) run through non-EU providers without a stated safeguard.

8 — EU hosting on named infrastructure, EU contracting entity, subprocessors listed with their locations including the engines and LLM providers, a data processing agreement published, and security certifications (ISO 27001, SOC 2) stated — or a self-hosted edition documented that keeps every text on the customer's own servers.

10 — Sovereign end to end and evidenced: European ownership, entity, hosting, engine and every subprocessor, or a self-hosted open-source edition with no call home, data export and deletion documented, and certifications published with their scope rather than implied.

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The App Developer

The contracting entity is a Polish sole proprietorship in Wrocław, hosting is exclusively AWS EU regions with encrypted backups in geographically redundant EU locations, the data processing agreement is published, and a subprocessor list names the hosting, payment, support and translation providers including the AI engines. It stops short of full transparency: most subprocessors are listed without their locations, the CDN edge serving translations is described only as global, and the machine translation providers are non-EU when enabled — though local models via Ollama are offered so texts stay on your own infrastructure. 7 8 9

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Pricing transparency

How this is scored

Whether a buyer can compute the real annual cost from public pages alone: price per tier by characters, words, keys, hosted words or seats, what happens when the volume exceeds the tier, the number of users, projects and languages included, which features (machine translation volume, AI credits, SSO, integrations, API access) cost extra, the free tier and its limits, the self-hosted edition and its support, minimum term and setup.

0 — No public prices at all; every customer is a sales call.

3 — A starting price or a free tier exists, but how cost scales with volume, seats or features is unclear.

5 — Tiers are public with their price per volume band and main inclusions, but at least one commonly needed piece (overage, extra seats, machine translation or AI volume, SSO, connectors) is unpriced or "on request".

8 — Every tier priced publicly with its scaling rule (characters, words, keys, seats), overage handling stated, add-ons and AI credits priced, the self-hosted edition's cost or licence stated, minimum term and VAT treatment stated.

10 — Complete price computability: annual cost derivable for a given volume, seat count and feature set, with every add-on, setup, support and overage fee and the cancellation and data-return terms published.

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The App Developer

Tiers are public with exact prices — Community at €0 for ever, Developer at €12 / month billed yearly, Team at €35 / month billed yearly, Business at €99 / month billed yearly — auto-translation allowances per tier with monthly increases, priced add-ons (+500 translation keys €5.00, +250k characters €12.00, +25 team members €25.00), VAT deduction at checkout and no per-user upcharge. What I still could not compute is how many translation keys each tier includes and what happens when the Fair Use Policy kicks in at my volume. 6 13 11

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European sovereignty — proven facts

0 of 6 dimensions proven

Built only from facts shown on the vendor's own pages. A dimension we could not prove is left open, not scored as zero.

Hosting location Not determined ⚠ unverified — uncited Report an error
Hosting options Not determined — uncited Report an error
Open source Not determined — uncited Report an error
Data processing agreement Not determined ⚠ unverified — uncited Report an error
Transfer impact assessment Not determined — uncited Report an error

Questions about SimpleLocalize

Is SimpleLocalize European?

Yes. whats-best.ai classifies SimpleLocalize as EU-Made.

Where does SimpleLocalize store data?

Not stated on the vendor’s pages as of 1 Nov 2026.

Does SimpleLocalize have a free plan?

Yes. SimpleLocalize has a free plan, per the vendor’s page captured 1 Nov 2026.

What are the best alternatives to SimpleLocalize?

As of 2 Nov 2026, the panel rates LILT (3.5/5), Phrase Localization Platform (3.5/5) and Tolgee (3.5/5) highest among the other 12 Translation & Localization products evaluated. Ratings that look equal are rounded to half stars; the order uses the unrounded rating, then the name. The highest-rated European alternative is Phrase Localization Platform (EU-Made). Ratings are the AI panel’s opinion, formed from public evidence: how scores are made. The full list, with European products first: SimpleLocalize alternatives.

Where this could be wrong

What we left out

A claim that does not survive our checks costs us the claim, not the page. This is what was taken off this one.

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Sources (20)

The pages every claim on this page was read from — each one checked, dated, and kept verifiable.

  1. 1 Vendor homepage simplelocalize.io Checked 1 Nov 2026 Details →
  2. 2 Features page (for developers) simplelocalize.io Checked 1 Nov 2026 Details →
  3. 3 Documentation (auto-translation) simplelocalize.io Checked 1 Nov 2026 Details →
  4. 4 Integrations page simplelocalize.io Checked 1 Nov 2026 Details →
  5. 5 API documentation simplelocalize.io Checked 1 Nov 2026 Details →
  6. 6 Pricing page simplelocalize.io Checked 1 Nov 2026 Details →
  7. 7 Legal notice simplelocalize.io Checked 1 Nov 2026 Details →
  8. 8 Privacy policy simplelocalize.io Checked 1 Nov 2026 Details →
  9. 9 Data processing agreement (dpa) simplelocalize.io Checked 1 Nov 2026 Details →
  10. 10 Security / trust page simplelocalize.io Checked 1 Nov 2026 Details →
  11. 11 Machine translation & AI quality — found from sitemap simplelocalize.io Checked 1 Nov 2026 Details →
  12. 12 Machine translation & AI quality — found from sitemap simplelocalize.io Checked 1 Nov 2026 Details →
  13. 13 Translation memory, terminology & review workflow — found from sitemap simplelocalize.io Checked 1 Nov 2026 Details →
  14. 14 Translation memory, terminology & review workflow — found from sitemap simplelocalize.io Checked 1 Nov 2026 Details →
  15. 15 Integrations, file formats & developer tools — found from sitemap simplelocalize.io Checked 1 Nov 2026 Details →
  16. 16 Integrations, file formats & developer tools — found from sitemap simplelocalize.io Checked 1 Nov 2026 Details →
  17. 17 Confidentiality of translated content — found from sitemap simplelocalize.io Checked 1 Nov 2026 Details →
  18. 18 Data export, portability & self-hosting — found from sitemap simplelocalize.io Checked 1 Nov 2026 Details →
  19. 19 Data export, portability & self-hosting — found from sitemap simplelocalize.io Checked 1 Nov 2026 Details →
  20. 20 Code repository (open-source licence) — found from the homepage github.com Checked 1 Nov 2026 Details →