Best Text Analysis APIs in 2026

The top 15 of 20 free Text Analysis APIs, ranked by how easy they are to start with (API key, HTTPS, CORS), how reliable they are in our daily health checks, and what developers rate them. Cloudmersive Natural Language Processing API takes the top spot.

Last tested Oct 24, 2026 · Rankings update daily

1
Cloudmersive Natural Language Processing API
Online · 811 ms
Natural language processing and text analysis.
- Callable from the browser (CORS)
- HTTPS
apiKeyHTTPSCORS
2
eidosSpeech API
Online · 787 ms
Free text-to-speech API with 1,200+ neural voices in 75+ languages.
- Callable from the browser (CORS)
- HTTPS
apiKeyHTTPSCORS
3G
GeoScore API
Online · 719 ms
Score content for AI search citation readiness with a 0-100 GEO score and 8 structural metrics.
- Callable from the browser (CORS)
- HTTPS
apiKeyHTTPSCORS
4
Lecto Translation API
Online · 542 ms
Translation API with free tier and reasonable prices.
- Callable from the browser (CORS)
- HTTPS
apiKeyHTTPSCORS
5
Langbly API
Online · 1535 ms
Context-aware text translation and language detection for 100+ languages.
- Callable from the browser (CORS)
- HTTPS
apiKeyHTTPSCORS
6
LibreTranslate API
Online · 1461 ms
Translation tool with 17 available languages.
- No API key needed
- HTTPS
No authHTTPSCORS ?
7
Tisane API
Online · 705 ms
Text Analytics with focus on detection of abusive content and law enforcement applications.
- Callable from the browser (CORS)
- HTTPS
OAuthHTTPSCORS
8
Detect Language API
Online · 775 ms
Fast, reliable text language identification API.
- HTTPS
apiKeyHTTPSCORS ?
9
ToHuman API
Online · 610 ms
Rewrite AI-assisted drafts into natural, human-sounding text that reads like you wrote it.
- HTTPS
apiKeyHTTPSCORS ?
10
Google Cloud Natural API
Online · 2623 ms
Natural language understanding technology, including sentiment, entity and syntax analysis.
- HTTPS
apiKeyHTTPSCORS ?
11H
Hirak OCR API
Online · 713 ms
Image to text -text recognition- from image more than 100 language, accurate, unlimited requests.
- HTTPS
apiKeyHTTPSCORS ?
12H
Hirak Translation API
Online · 636 ms
Translate between 21 of most used languages, accurate, unlimited requests.
- HTTPS
apiKeyHTTPSCORS ?
13
ELI API
Online · 2136 ms
Natural Language Processing Tools for Thai Language.
- HTTPS
apiKeyHTTPSCORS ?
14
apilayer languagelayer API
Online · 1284 ms
Language Detection JSON API supporting 173 languages.
- HTTPS
OAuthHTTPSCORS ?
15
Semantria API
Online · 2090 ms
Text Analytics with sentiment analysis, categorization & named entity extraction.
- HTTPS
OAuthHTTPSCORS ?

Text Analysis APIs compared

Top Text Analysis APIs compared
API	API key	HTTPS	CORS	Uptime	Response	Rating
Cloudmersive Natural Language Processing	Required	Yes	Yes	Up	811 ms	Not rated
eidosSpeech	Required	Yes	Yes	Up	787 ms	Not rated
GeoScore	Required	Yes	Yes	Up	719 ms	Not rated
Lecto Translation	Required	Yes	Yes	Up	542 ms	Not rated
Langbly	Required	Yes	Yes	Up	1535 ms	Not rated
LibreTranslate	No	Yes	Unknown	Up	1461 ms	Not rated
Tisane	OAuth	Yes	Yes	Up	705 ms	Not rated
Detect Language	Required	Yes	Unknown	Up	775 ms	Not rated
ToHuman	Required	Yes	Unknown	Up	610 ms	Not rated
Google Cloud Natural	Required	Yes	Unknown	Up	2623 ms	Not rated

More Text Analysis APIs

Best Text Analysis API FAQ

What is the best free Text Analysis API in 2026?

Based on access, reliability and developer ratings, the top free Text Analysis APIs right now are Cloudmersive Natural Language Processing API, eidosSpeech API and GeoScore API. Cloudmersive Natural Language Processing API ranks first. Rankings update daily from health checks of all 20 Text Analysis APIs in the directory.

What is the best Text Analysis API without an API key?

LibreTranslate API need no API key, so you can call them without signing up. 1 of the 20 ranked Text Analysis APIs are keyless.

Which Text Analysis API works from the browser?

Cloudmersive Natural Language Processing API, eidosSpeech API and GeoScore API support CORS over HTTPS, so front-end JavaScript can call them directly without a proxy.

How are these APIs ranked?

Each API gets a score from: no API key (+), HTTPS (+), CORS support (+), 30-day uptime and response time from our daily health checks, and ratings from developers on this site. APIs that failed three checks in a row are left out until they recover.