5 Best AI Translator Tools and How to Choose the Right One

AI translation tools are the perfect solution to getting good-quality translations completed quickly and affordably. But with so many options mushrooming, the quest to pick the best AI translator tool for your business can be overwhelming. 

This article will give you answers to the following questions: 

• What exactly is AI translation, and what are some real-world examples of its uses? 
• Which are the best AI translator tools currently on the market? 
• What should you look out for when selecting an AI translation tool? 
• How can you seamlessly integrate AI translation tools into your workflow? 

 

What is AI translation?

AI translation is also often referred to as machine translation. It is an on-demand, automatic translation method that uses neural machine learning, natural language processing, and algorithms to determine the meaning of words within their context. The results: translations that have correct sentence structures, are grammatically correct, and read fluently and naturally.  

Recent developments in generative AI (GenAI) springboarded the potential of AI translations. Using sequence-to-sequence learning, it learns from sequences of sentences to deliver translations that match the original text’s context, tone, and meaning. Furthermore, GenAI can also edit outputs for fluency and writing style.  

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Methodology: How we evaluated the AI translation tools

We built this list through in-depth desk research, analyzing a wide range of publicly available information to identify the most relevant and capable AI translation tools for professional use. Here’s how we approached it:

1. Market Visibility & Adoption

We prioritized tools that are widely used and recognized across the localization and AI translation landscape. Our evaluation considered:

• Integration into translation management systems and localization workflows
• Inclusion in independent industry roundups and analyst reports
• Adoption by enterprise teams in industries like SaaS, manufacturing, and e-commerce

2. Published Features & Capabilities

Since we didn’t run hands-on tests for every tool, we leaned heavily on official sources: product pages, feature lists, and API documentation. We looked for things like:

• Neural machine translation (NMT) or other AI-driven tech
• Customization options like glossaries, termbases, or tone settings
• Integrations with CAT tools, TMS platforms, and team-friendly features

Basically, if the tool says it’s “AI-powered,” we wanted to understand what that actually means in practice.

3. User Feedback & Online Reputation

To gauge real-world performance, we reviewed verified user feedback on trusted software review platforms like G2 and Capterra. We looked for:

• Common concerns related to quality, UX, or language coverage
• Recurring strengths highlighted by professional users

4. Transparency & Innovation

Lastly, we gave extra weight to platforms that demonstrate transparency in how their AI systems work. This included:

• Evidence of continuous updates or R&D investment
• Clear documentation about machine learning models and data handling
• Ethical AI policies or explainability features aimed at professional users

Best AI translation tools 

There are a variety of AI Translation Tools available for enterprise use. Let’s have a look at some of the best AI translator tools available, and what they are best suited for.  

Tool	Best For	Languages	File Types	Strengths	Limitations
Google Translate	Fast, no-frills translation in 240+ languages	240+	Text, images, websites, Office & PDF docs	Widest language support, offline mode, real-time speech & image translation	Not privacy-secure, no integrations, weaker with complex/rare languages
ChatGPT	AI-assisted rewriting & multilingual content drafting	50+	Text, documents	Flexible tone control, generative AI rewriting, context understanding	Not a dedicated translation tool, slower, character/text limits
DeepL	High-quality, natural-sounding translations	33	Text, .docx, .pdf, .pptx	Glossary support, formatting preserved, idiomatic accuracy	Limited language coverage, translation volume limits
Microsoft Translator	Real-time translation in MS ecosystems	135	Text, speech, images, MS files	Custom terminology, Microsoft integration, strong voice support	Accuracy varies, MS dependency, no dialect-specific options
Google Gemini	Multilingual content generation & translation prep	130+	Text, images	Style polishing, translation QA, multimodal inputs	Not a dedicated translator, limited integrations, privacy caveats

Google Translate  

Best for fast, no-frills translation across 200+ languages

Google Translate needs no introduction. A pioneer in modern-day machine translation, it was launched in 2006 and offers translations between 130+ language pairs for free. It has the widest language offering, however the quality of less frequently used or more complex languages can vary. 

In addition to real-time text and image translations, Google Translate also offers speech translation and text-to-speech capabilities. Furthermore, web browser extensions and a handy app (that can even work in offline mode) allow users to easily integrate it into daily routines and make it a great option for travel.  

It was recently announced that Google Translate will benefit from improved accuracy and fluency of translations thanks to Google Gemini.   

Key Features

Languages supported: 240+ 

Machine Translation Technology: Neural machine translation with machine learning. The app continuously refines its translation outputs based on user feedback. 

File Format Compatibility: Text, images, documents (.docx, .pdf, .pptx, .xlsx), websites 

Data security: Does not guarantee the privacy or security of translated data 

Cost: Free. Google also offers Cloud Translation API, a pay-as-you-go API that allows companies to integrate  Google’s machine translation technology into apps or software.

Good for: Simple, straightforward texts that are low-visibility and non-critical. Quick translations for personal and informal use.  

ChatGPT

Best for AI-assisted rewriting and multilingual content drafting

OpenAI’s large language model chatbot, ChatGPT, wowed the internet in 2023 with its phenomenal ability to converse with users in a human-like manner.  

Based on powerful natural language processing algorithms (NLP) and generative AI models, ChatGPT has a superior understanding of the context and nuances of texts, thus producing better translations. What’s more is that users can prompt the app to translate text, and then polish the output based on a desired tone and style.  

One thing to note is that while ChatGPT is capable of translations, this is not the main objective of the tool. This means translations may not be as accurate as other dedicated translation tools.  

 

Key Features

Languages supported: 50+ 

Machine Translation Technology: Generative AI translation 

File Format Compatibility: Text and documents 

Data security: Does not guarantee the privacy or security of translated data 

Cost: GPT Free handles simple tasks well at no extra costs, but GPT Plus offers more accurate translations, better tone control, and stronger long-form writing capabilities for USD 20/month.

Good for: Translations which you want in a particular style and tone 

 

DeepL 

Best for high-quality, natural-sounding translations

DeepL is a popular AI translation tool known for fluent and natural-sounding translations. While it doesn’t offer as many language options as its counterparts, it makes up for it with highly accurate translations. The reason for this is due to DeepL being trained with Linguee. Access to this large database of human-translated text, including idioms, enables it to capture nuances in language and the context better. 

Another key advantage of DeepL is the potential to upload glossaries (even in the free version) to ensure key terminology is correctly translated. Furthermore, it also maintains document formatting after translation. DeepL also recently introduced an AI writing companion to further improve writing and perfect the style and tone of texts.  

 

Key Features 

• Languages supported: 33
• Machine Translation Technology: Neural machine translation 
• File Format Compatibility: Text and documents (.pdf, .docx, .pptx) 
• Data security: Privacy and security of translated data assured for paid plans 
• Cost: Free, with limitations. Paid plans start from USD 8.74/month 
• Good for: Translation of European languages 

  

Microsoft Translator 

Best for real-time collaboration and integration with Microsoft 365

Microsoft Translator is a user-facing machine translation portal that provides free text, website, and speech translations. Built on neural machine translation, a basic text translator is available on web browser. Users looking for a feature-rich version can download the Microsoft Translator app for free. The app includes functionalities such as voice translation and image translation. 

Microsoft also offers ‘Custom Translator’, a powerful paid feature which allows users to develop customized translation systems that integrate company and industry terminology. These customized systems can then be integrated into existing workflows, providing great value in professional and educational settings. 

 

Key Features 

Languages supported: 135 

Machine Translation Technology: Neural machine translation 

File Format Compatibility: Text, speech, images, MS Files  

Data security: Data shared with Translator for Business is not stored. Voice clips and text translations in free Microsoft Translator products are used for quality improvement.  

Cost: Mostly free for personal use. Tiered pricing model from USD2K/month for API users 

Good for: Companies using Microsoft products. Professional and educational settings, where accurate terminology is required. 

  

Google Gemini  

Best for AI-powered content transformation and multilingual content generation

Google Gemini is a large language model (LLM) and generative AI chatbot. Previously known as Bard, it stands out from other LLMs because it is not trained solely on text and is designed to be multimodal, meaning it can process multiple types of data simultaneously (e.g. text, images, audio, video, and even software code).  

Gemini relies on Google Translate. Its added value is that it can make your text more suitable for translations, and then polish the translation output based on your desired style and tonality. Furthermore, it can also assess the accuracy and natural flow of a translation.  

Initial tests have found that Gemini outperformed GPT-4 and GPT-3.5 Turbo in several areas when translating supported languages. 

Key Features 

Languages supported: 130+ 

Machine Translation Technology: Generative AI translation 

File Format Compatibility: Text, images 

Data security: Data input into Gemini Apps are anonymized then read, annotated, and processed by human reviewers for quality and product improvement purposes. However, users can manage data from being stored and used. 

Cost: Free. Gemini Advanced is accessible via a free trial, then costs USD 19.99/month 

Good for: Preparing and fine-tuning machine translations 

Which is the best AI translation tool for me?

Accuracy, speed, and ease of use are important factors when selecting the best AI translator tool. But other factors must also be considered to ensure a tool will deliver the expected value and ROI. 

Here are some things to consider when selecting the best AI translator for your company’s use:

Your requirements

• Define the type of content you need to translate. For example, technical documentation translation is more efficient and accurate when you can use tools such as translation memory, termbases and glossaries. 
• What is the volume of content you need to translate? Will you need to scale this volume or include more language pairs in the future? Some foresight into future needs can ensure you pick a tool that can scale with your company’s growth.  
• Must your translation just match factually, or must terminology and brand style also be incorporated?  
• Identify the language pairs you require to ensure you pick the tool that offers the best support for your language needs. 
• Check your company’s security and privacy requirements to ensure the tool you select fulfils them.  

Features offered

• Does the AI translator integrate with or offer computer-aided translation (CAT) tools and features such as style guides, translation memory, glossaries and termbases? These are handy to fine-tune translations for your company and industry.  
• Check for integrations and APIs with: 
  • Your existing content or software publishing systems to streamline and automate processes. 
  • Your translation management system (TMS), if you already have one or are intending to use one. 

Your budget

• Many AI translator tools and translation projects operate on a tiered pricing model based on use. Thus your budget can be impacted by your translation volumes. 
• Opting for the cheapest tool might result in more manual work for your team, while the most expensive tool might leave you paying for features you don’t need. Assign a weighted score to important factors and features, including price, to help make an objective decision.  

Reviews

• Check peer-to-peer corporate review sites, such as G2Crowd, for insights from existing customers.  
• Seek recommendations from peers in your industry where possible. 
• Ask potential vendors for client references.  

Related Reading: Learn how Milengo integrates your chosen tools and technology into seamless workflows

Get expert help with choosing the right AI translation setup

Whether you’re just starting with AI translations or you’re looking to upgrade your localization processes, AI translation tools are the future for fast, accurate, and cost-effective global communications.  

One thing to remember is that AI translation tools don’t need to be used alone. You can (and should) add a layer of human reviewing to ensure important content is translated well. At the same time, integrating AI translators with translation management systems can automate processes and reduce the amount of back and forth, saving you more time and money along the way.  

As a technology-agnostic language service provider with more than 30 years of industry experience, Milengo has knowledge and expertise on the best technology tools available. Our in-depth understanding of industry offerings results in a service that provides more than just AI translations. Milengo takes the guesswork out of your localization setup and develops the best solution for your needs. 

Since you’re here, why not schedule a call with Milengo for personalized advice on the best AI translator and localization setup for your business needs?