Software advice
Best AI Translation Software in 2026
AI translation software is a class of tools that convert text, documents, app strings or whole websites from one language into another using neural machine translation or large language models, usually with glossaries and review steps around the output. Some products are free translators for individuals, some are APIs for developers, and some are localization platforms that coordinate translators and translation memory. It is not a human translation agency.
Quick answer
DeepL ranks first for text and document translation where fluency and a no-training promise on paid plans matter. Google Translate fits anyone who needs the widest free reach and a cheap API. Smartling fits enterprises that run translation as a managed program with human review.
Buyers of translation software are rarely choosing between the same things. One person wants to paste a contract paragraph into a box and get fluent German back. A developer wants an API that translates a million characters for the price of lunch. A localization manager wants strings, glossaries, reviewers and a release process. This ranking covers all three and says which is which, because a translator and a translation management platform answer different questions. We judged what each vendor publishes about plans, data handling and workflow, read from vendor pages in October 2026. We ran no accuracy benchmarks, so output quality is described as a design trade-off, never as a score.
The 8 best translation software in 2026, ranked
The order is the verdict, there is no score. No vendor paid for position. How we rank.
| # | Tool | Best for | Free plan | Entry price |
|---|---|---|---|---|
| 1 | DeepL | Individuals and teams translating documents and business text where fluent output matters most | Yes | 7.49 euros per month, billed annually |
| 2 | Google Translate | Anyone who needs the widest language coverage for free, plus developers wanting a cheap pay-as-you-go API | Yes | Free for consumers; Cloud API $20 per million characters |
| 3 | Smartling | Large companies running continuous multilingual content with machine translation first and human review where needed | Yes | Quoted |
| 4 | Phrase | Companies that want one platform for both document translation workflows and software string localization | Trial | 525 per month, billed annually (Software UI/UX plan) |
| 5 | Lokalise | Product and engineering teams localizing apps, games and web products with designers and developers in the loop | Trial | $149 per month (Explorer) |
| 6 | Crowdin | Open source projects and software teams that want a large integration library at a lower price | Yes | $50 per month (Pro) |
| 7 | Weglot | Small and mid-size businesses that want a multilingual WordPress, Shopify or Squarespace site without a localization team | Yes | $17 per month (Starter) |
| 8 | Microsoft Translator | Developers and Microsoft-based organizations adding translation to apps through Azure at a low per-character rate | Yes | $10 per million characters (Azure S1) |
- 1
DeepL
DeepL takes first place because translation is the entire product, not a feature of something larger. Paid plans add glossaries, file translation and a stated no-training policy, and the vendor lists SOC 2 Type II and ISO 27001. A free translator and a free API key exist for testing. The trade-off is a narrower language list than Google, and free-tier content may be used for training.
Strong on
- Paid plans state no data training, per the vendor's pricing page
- Glossaries, style rule lists and file translation are included on paid tiers
- Vendor lists SOC 2 Type II and ISO 27001 on its trust pages
Weak on
- Privacy policy says content in free services may be used to improve its networks
- Individual plan caps usage at 300,000 characters and 3 file translations monthly
Skip it if: Teams that need to cover dozens of rare languages or need a full localization workflow with human reviewers. Individual plan with 300,000 characters a month. Team is 24.99 euros per user, Business 49.99, Enterprise quoted.
- 2
Google Translate
Google Translate ranks second because nothing else matches its reach and price for casual use. The consumer app costs nothing, and the Cloud Translation API gives 500,000 characters a month free, then a per-million rate. Google states Cloud content is used only to provide the service. It places behind DeepL because glossary and style control sit in the paid cloud product, and the consumer tool has no admin layer.
Strong on
- Consumer web and app translation is free to use
- Cloud API gives 500,000 free characters a month, then $20 per million
- Google says Cloud Translation text is used only to provide the service
Weak on
- Consumer data terms were not checked here, so keep confidential text out of it
- No project workflow, reviewer assignment or translation memory in the basic tool
Skip it if: Teams that need approval workflows, in-context translation of app strings or a managed human review step. Cloud Translation NMT includes 500,000 free characters monthly, then $20 per million, with lower rates at volume.
- 3
Smartling
Smartling ranks third because it is the most complete managed program in this list. It combines a translation management system, an AI hub offering 20+ language models and engines, and a network of 4,000+ linguists. Its security page lists SOC 2, HIPAA, HITRUST, PCI and several ISO standards. Pricing is opaque beyond the free-to-start Core tier, and smaller teams will find it more platform than they need.
Strong on
- AI Hub lets teams choose among 20+ language models and machine engines
- Security page lists SOC 2, HIPAA, PCI, HITRUST and ISO 27001
- Connects to 50+ platforms and offers a web translation proxy
Weak on
- Enterprise pricing is quoted, so total cost is unknown before a sales call
- Training use of customer text was not found on the pages reviewed
Skip it if: Solo translators or small sites that want a fixed monthly price and a quick start without sales contact. Core tier is listed as free to start; Enterprise pricing is quoted and not published.
- 4
Phrase
Phrase lands fourth because it covers both halves of localization, with a translation management product for documents and a strings product for software. Plans are sold by capacity, with seats, managed words and AI units listed per tier. The security statement lists ISO 27001 and SOC 2 Type I. It ranks below Smartling because the entry price is high and Type II certification was only expected in 2026.
Strong on
- Single vendor for translation management and software string localization
- Plan pages list seats, managed words and machine translation units
- Every plan includes a 14-day trial and 24/7 support
Weak on
- Software plan starts at 525 per month, high for small teams
- SOC 2 Type II was listed as expected in 2026, not yet held
Skip it if: Freelancers and small projects that need a low fixed price or a permanent free tier. Team plan is 1,245 per month billed annually; Business and Enterprise are quoted. Every plan has a 14-day trial.
- 5
Lokalise
Lokalise sits fifth because it is a strong fit for software teams and a weaker fit for everyone else. It offers Figma and repository connectors, AI suggestions with context, and custom AI profiles built on your own translation memory. Its AI statement says customer content is used as context only, not for model training, and it holds ISO 27001 and SOC 2 Type II. Prices step up sharply by tier.
Strong on
- AI statement says custom AI profiles use customer memory as context, not for training
- Holds ISO 27001 and SOC 2 Type II, per its AI statement
- Free for open source projects, with a 14-day trial of Enterprise features
Weak on
- Tiers jump from $149 to $379 to $1,049 a month
- Built around software strings, so documents and websites need other tools
Skip it if: Marketing teams translating documents or a content site who have no developers or design files involved. Growth is $379 and Advanced $1,049 monthly; Enterprise is quoted. A free plan follows the 14-day trial.
- 6
Crowdin
Crowdin ranks sixth because it is the budget route into software localization, with a free plan for open source and listed paid tiers from $50. It advertises 700+ apps and integrations. Its privacy policy says Crowdin does not use client data to train models, and the vendor lists ISO 27001. It ranks below Lokalise and Phrase because the pricing page shows little plan detail beyond headline prices and no enterprise terms.
Strong on
- Free plan available, and an open source license program
- Advertises more than 700 apps and integrations for automated content sync
- Privacy policy says Crowdin does not train models on client data
Weak on
- Plan details beyond headline prices were not readable on the pricing page
- Hosted-word limits apply across all projects, so cost grows as you add target languages
Skip it if: Companies that need a sold-and-supported human translation service from one vendor as the main offer. Listed offers are Pro $50, Team $150 and Team+ $450 a month, with a free plan for open source work.
- 7
Weglot
Weglot ranks seventh because it solves one job well and nothing else. It scans a live site, translates the text with AI, lets you edit, and serves each language on its own URL. Plans are priced by words and languages, from a free 2,000-word tier to $769 a month. The vendor lists SOC 2 Type 2. It is not a general translator or a software localization tool.
Strong on
- Works on any website technology, with language-specific URLs
- Free plan and 14-day trial on paid tiers
- Vendor lists SOC 2 Type 2 and GDPR compliance
Weak on
- Word and language caps force plan upgrades as a site grows
- Not designed for documents, app strings or API-first translation
Skip it if: Teams that want to translate documents, app interfaces or chat messages rather than a public website. Free plan covers 2,000 words and one language; Business is $32, Pro $87, Advanced $329 per month.
- 8
Microsoft Translator
Microsoft Translator closes the list because it is more of a building block than a finished product for most buyers. Through Azure Translator it offers text and document translation, custom models and a free tier of 2 million characters monthly, at a lower rate than Google's. Microsoft says text is not persisted. There is no glossary-driven editor or reviewer workflow for non-developers.
Strong on
- Free F0 tier includes 2 million characters a month
- S1 rate of $10 per million characters, per Azure's retail price list
- Microsoft says text translation does not store customer data
Weak on
- Developer-oriented, with no project or reviewer workflow for non-technical staff
- Pricing page renders prices client-side, so rates came from the retail price API
Skip it if: Marketing and localization teams who need an editor, translation memory and approvals without writing code. Azure Translator's F0 tier includes 2 million free characters a month; the S1 pay-as-you-go rate is $10 per million.
How these translation software were judged
How accurate is AI translation, and who checks it?
Accuracy depends on the language pair, the subject and the review step more than on the brand. DeepL positions its product as a specialist language model and adds glossaries and style rules on paid tiers. Google Translate and Microsoft Translator cover far more languages, with the long tail weaker than the major pairs. Platforms such as Smartling and Phrase add scoring and human post-editing around machine output. Vendors do not publish neutral accuracy scores, so test your own text. Take ten real paragraphs, have a native speaker mark errors, and check whether a glossary fixes your product terms. Treat anything legal or medical as needing a human reviewer.
What does translation software cost in 2026?
Pricing comes in three shapes, as of October 2026. Per user: DeepL's Individual plan is 7.49 euros a month billed annually, and Team is 24.99 euros per user. Per character: Google Cloud charges $20 per million characters after 500,000 free each month, and Azure Translator lists 2 million free characters monthly. Per project: Weglot starts at $17 a month, Crowdin lists Pro at $50, Lokalise Explorer is $149, and Phrase's software plan is 525 a month billed annually. Smartling's Core tier is free to start while Enterprise is quoted. Check words and languages included before comparing, since limits differ.
Is my text used to train translation models?
Policies split along free and paid lines. DeepL's pricing page says no data training on paid plans, while its privacy policy says content processed in free services may be used to train its networks. Google says Cloud Translation content is used only to provide the service, and Azure Translator does not persist submitted text. Crowdin's privacy policy says it does not use client data to train models. Lokalise says custom AI profiles use customer memory as context only, not for training. Certifications vary too: Smartling lists SOC 2 Type II, Phrase lists SOC 2 Type I, Weglot lists SOC 2 Type 2. Never paste confidential files into a free consumer translator.
How hard is it to leave a translation platform?
Moving between instant translators costs almost nothing, because only habit and an API key are involved. Platforms hold more of your value. Translation memory, glossaries, style rules and per-project settings accumulate over years, and a vendor that makes export awkward makes switching expensive. Ask each vendor whether translation memory leaves as a standard TMX file, whether glossaries export, and how connectors to your code repository or CMS get replaced. Weglot adds a different kind of dependence, since a live website reads its translations from the vendor at run time. Keep an export of your content before any contract renews.
Which translation tool fits a freelancer, a developer or an enterprise?
A freelancer or small office translating documents should compare DeepL Individual with the free tier of Google Translate and judge by their own languages. A developer adding translation to an application should compare per-character API prices at DeepL, Google Cloud and Azure, then decide whether glossaries matter. A product team shipping an app in many languages should shortlist Lokalise, Crowdin and Phrase, and trial two for 14 days. A marketing team with a WordPress or Shopify site should look at Weglot. An enterprise with human reviewers and vendor management needs Smartling or Phrase and a quote.
How to choose a translation software product in three steps
- Name the content type before the tool. List what you translate: emails and documents, interface strings, a live website, or support articles. Each points to a different kind of product. Documents and chat messages suit DeepL, Google Translate or Microsoft Translator. Strings in a code repository suit Lokalise, Crowdin or Phrase. A WordPress or Shopify storefront suits Weglot. Continuous enterprise content with human review suits Smartling. Buyers who skip this step often pick a translator and then discover they also need translation memory, reviewers and a connector to their CMS, which the instant tools do not provide.
- Run the same sample through two finalists. Take one real document of about 500 words in your hardest language pair, plus ten sentences containing product names, numbers and idioms. Run both through the free tier or 14-day trial of each finalist and have a native reader mark errors and awkward phrasing. Then add a glossary for your product terms and run the sample again to see how well the tool applies it. DeepL, Phrase, Lokalise and Weglot all advertise free trials or free tiers, so this costs an afternoon rather than a purchase order.
- Check data terms and the exit before you commit. Read the privacy policy of each finalist and write down three answers: whether your text trains models on your plan, how long it is kept, and which certifications the vendor holds. Then test the exit. Export a translation memory or glossary from the trial account and confirm it opens elsewhere. For platforms sold by quote, ask for the data processing agreement and the sub-processor list in writing. A vendor that answers in one email is easier to work with than one that routes you through three sales calls.
Frequently asked questions
What is the best AI translation software in 2026?
DeepL ranks first in this comparison because it pairs fluent text and document translation with a stated no-training policy on paid plans. Google Translate ranks second for language coverage and a free consumer tool, and Smartling third for enterprise programs with human review. The right pick still depends on whether you translate text, strings or a website.
Is DeepL better than Google Translate?
Neither vendor publishes a neutral accuracy score, so the answer depends on your language pair and subject matter. DeepL sells itself on fluency and offers glossaries and style rules on paid plans. Google Translate covers far more languages and costs nothing for consumers. Run the same paragraphs through both and let a native speaker judge.
Is there free translation software with an API?
Yes. Google Cloud Translation gives the first 500,000 characters each month free, Azure Translator lists 2 million free characters per month on its F0 tier, and DeepL offers a free API key. Weglot has a free plan limited to 2,000 words and one language. Free tiers suit tests and small projects, not production volume.
What is the difference between a translator and a translation management system?
A translator such as DeepL or Google Translate converts text you submit and returns it. A translation management system such as Smartling or Phrase organizes the work around it: translation memory, glossaries, reviewer assignment, status per language and connectors to your content systems. Companies with ongoing multilingual content usually need the second kind.
Which translation tool is best for translating a website?
Weglot is built for that job. It reads the text on a live site, translates it automatically, and publishes each language on its own URL. Plans start at $17 a month and are limited by translated words and languages. Larger sites with editorial teams may prefer Smartling, which also offers a web translation proxy.
Which tool is best for translating app strings?
Lokalise, Crowdin and Phrase Strings are the usual shortlist. All three connect to code repositories, give translators screenshots or context, and push finished strings back to developers. Crowdin has a free plan, Lokalise offers a 14-day trial of its top features, and Phrase gives a 14-day trial on every plan. Test the repository connector first.
Does translation software keep my documents?
It depends on the vendor and the plan. Azure Translator says it does not persist customer text and hard-deletes documents after processing. Google says Cloud Translation content is used only to provide the service. DeepL says paid plans involve no data training. Free consumer tools generally carry weaker promises, so check the policy before uploading anything confidential.
Can machine translation replace human translators?
For internal messages, support replies and first drafts, machine output is often enough. For legal contracts, medical text, regulated filings and brand copy, a human reviewer is still the safer choice. Platforms such as Smartling and Phrase exist to combine both, using machine translation first and routing selected content to linguists for post-editing.