Pricing comparison
Real pricing based on monthly character volume. All prices in USD.
| Volume | Google Translate | DeepL | Langbly | You Save |
|---|---|---|---|---|
| 500K chars/mo | $0 | Check live plan | $0 | Both included/evaluation |
| 1M chars/mo | $10 | Check live plan | $2.50 | 75% vs Google |
| 5M chars/mo | $90 | Check live plan | $22.50 | 75% vs Google |
| 25M chars/mo | $490 | Check live plan | $122.50 | 75% vs Google |
| 100M chars/mo | $1,990 | Above Growth limit | $497.50 | 75% vs Google |
Feature comparison
| Feature | Google Translate | DeepL | Langbly |
|---|---|---|---|
| Python package | google-cloud-translate | deepl | langbly |
| pip install | pip install google-cloud-translate | pip install deepl | pip install langbly |
| Auth method | Service account JSON | API key string | API key string |
| Lines of code to translate | 6–8 lines | 3 lines | 3 lines |
| Type hints | |||
| Async support | |||
| Auto-retry on errors | Manual | Manual | Built-in |
| Typed error classes | Google exceptions | DeepLException | RateLimitError, AuthError |
| Retry-After support | |||
| Google v2 compatible | |||
| Published usage rate | $20/1M after 500K | Check live Growth plan | $5/1M after 500K |
| Included/evaluation usage | 500K/mo | Developer: 1M total | 500K/mo |
| Translation quality | NMT | NMT + AI | Next-gen AI |
| Context-aware | Limited |
Python SDK comparison: code examples
The easiest way to compare translation APIs is to look at real code. Here is how you translate text with each SDK in Python:
Google Translate (google-cloud-translate):
from google.cloud import translate_v2 as translate
import os
os.environ["GOOGLE_APPLICATION_CREDENTIALS"] = "service-account.json"
client = translate.Client()
result = client.translate(
"Hello world",
target_language="nl"
)
print(result["translatedText"])DeepL (deepl):
import deepl
translator = deepl.Translator("your-api-key")
result = translator.translate_text("Hello world", target_lang="NL")
print(result.text)Langbly (langbly):
from langbly import Langbly
client = Langbly(api_key="your-api-key")
result = client.translate("Hello world", target="nl")
print(result.translated_text)Google requires a service account JSON file and environment variable setup before you can make your first call. DeepL and Langbly both use simple API key strings, making them much faster to get started with.
Which Python translation API is easiest to set up?
Setup complexity is a real factor when choosing a translation API. Google Translate requires creating a Google Cloud project, enabling the Translation API, creating a service account, downloading a JSON key file, and setting an environment variable. This typically takes 10-15 minutes even for experienced developers.
DeepL and Langbly both use straightforward API key authentication. Sign up, copy your key, pass it to the client constructor. First API call in under 2 minutes.
Langbly has an additional advantage: built-in auto-retry with exponential backoff for rate limits (429) and server errors (5xx). The SDK also respects Retry-After headers and provides typed error classes like RateLimitError and AuthenticationError, so you can handle failures gracefully without writing boilerplate retry logic.
Pricing for Python developers
For Python developers building SaaS products, internal tools, or content pipelines, translation costs add up quickly. Langbly includes the first 500K input characters each month and charges $5 per million additional characters. Google applies a monthly credit to the first 500K before its $20/M standard-text rate. DeepL's current Growth total depends on its live plan.
Frequently asked questions
What is the best translation API for Python?
For most Python developers, Langbly offers the best combination of simple setup, clean SDK, async support, auto-retry, and affordable pricing. DeepL is a solid alternative for European languages. Google Translate has the most language coverage but the most complex setup.
How to translate text in Python?
Install a translation SDK with pip (e.g., pip install langbly), initialize the client with your API key, and call the translate method. With Langbly, it takes just 3 lines of code: create the client, call translate(), and read the result.
Is Google Translate API free for Python?
Google Cloud Translation includes the first 500,000 characters each month, then charges $20 per million for standard NMT. Langbly also includes the first 500,000 input characters each month and charges $5 per million additional input characters. DeepL Developer includes one million characters in total; check the live Growth plan for recurring use.
Which Python translation library is fastest to set up?
Langbly and DeepL are the fastest to set up. Just pip install the package and pass an API key. Google Translate requires creating a GCP project, enabling APIs, generating a service account JSON file, and setting environment variables.
Can I use Langbly with Python?
Yes. Install the official SDK with pip install langbly. The package supports Python 3.8+, includes full type hints, async support, auto-retry with exponential backoff, and typed error classes. It is available on PyPI.