Captchas.io vs. 9kw.eu
Objective architectural, pricing, and protocol comparison. Metrics reflect verified vendor specifications and third-party aggregator observations.
Captchas.io is an automated OCR and machine learning cloud platform structured around monthly thread subscriptions starting at $22/mo for 5 ...
Founded in 2011 in Germany, 9kw.eu is an atypical community-oriented platform operating on a mutual credit-exchange mechanism: developers so...
Supported Anti-Bot & CAPTCHA Types
Side-by-side support status across 14 major puzzle formats based on official API documentation.
| Challenge Mechanism | Captchas.io | 9kw.eu |
|---|---|---|
| Cloudflare Turnstile | — Not Listed | — Not Listed |
| Google reCAPTCHA v2 | ✓ Supported | ✓ Supported |
| Google reCAPTCHA v3 | ✓ Supported | ✓ Supported |
| reCAPTCHA Enterprise | — Not Listed | — Not Listed |
| Arkose Labs (FunCaptcha) | — Not Listed | — Not Listed |
| GeeTest (v3 / v4) | — Not Listed | — Not Listed |
| hCaptcha | ✓ Supported | ✓ Supported |
| Amazon AWS WAF Captcha | — Not Listed | — Not Listed |
| DataDome Interstitial | — Not Listed | — Not Listed |
| Image / Text OCR | ✓ Supported | ✓ Supported |
| Audio Recognition | — Not Listed | ✓ Supported |
| Kasada Anti-Bot | — Not Listed | — Not Listed |
| Akamai BMP / Shield | — Not Listed | — Not Listed |
| Lemin Captcha | — Not Listed | — Not Listed |
Documented Rates by Challenge Type (per 1,000 Solves)
Direct cost comparison per 1,000 successful solves. Attributed to captchathecat.com telemetry (October 2026).
| Challenge Type | Captchas.io Rate / 1k | 9kw.eu Rate / 1k |
|---|---|---|
| Image / Text OCR | Custom / Inquire | $1.35 |
| reCAPTCHA v2 (Checkbox / Invisible) | Custom / Inquire | $3.38 |
| reCAPTCHA v3 (Score-based) | Custom / Inquire | $3.38 |
| reCAPTCHA Enterprise | Custom / Inquire | Custom / Inquire |
| Cloudflare Turnstile | Custom / Inquire | Custom / Inquire |
| Arkose Labs (FunCaptcha) | Custom / Inquire | Custom / Inquire |
| GeeTest (v3 / v4) | Custom / Inquire | Custom / Inquire |
| hCaptcha | $4.00 | Custom / Inquire |
| Amazon AWS WAF Captcha | Custom / Inquire | Custom / Inquire |
| DataDome Interstitial | Custom / Inquire | Custom / Inquire |
Technical Specifications & Protocol Integrations
SDK libraries, API protocols, funding minimums, and architectural characteristics.
| Specification | Captchas.io | 9kw.eu |
|---|---|---|
| Architecture Paradigm | ai vision | hybrid |
| Commercial Model | pay as you go | pay as you go |
| Starting Price / 1k | Inquire | $0.00 |
| Minimum Account Deposit | $22.00 | $5.40 |
| Supported Protocols | Captchas.io REST API2Captcha Protocol Emulation | 9kw Custom HTTP REST APICaptchabot / 2Captcha Protocol Emulation |
| Available Client SDKs | PythonPHPC# | HTTP/REST PluginsJDownloader Plugin |
| Accepted Payment Methods | VisaMastercardPayPalBitcoinLitecoinEthereum | SEPA Bank TransferDigital Dashboard Gateways |
| Year Founded | 2019 | 2011 |
Reported Performance & Telemetry Observations
Strict segregation between vendor-stated claims and third-party aggregator measurements.
| Performance Metric | Captchas.io | 9kw.eu |
|---|---|---|
| Vendor Stated Latency | Undisclosed by vendor | Undisclosed by vendor |
| Vendor Stated Accuracy | Undisclosed by vendor | Undisclosed by vendor |
| Aggregator Observed Latency | Pending Laboratory Run | 3.24s Aggregator Telemetry |
| Aggregator Observed Accuracy | Pending Laboratory Run | Pending Laboratory Run |
| Laboratory Rating | Unrated (Laboratory Run Queued) | Unrated (Laboratory Run Queued) |
| Source Documentation Reference | https://captchathecat.com/service/captchasio ↗ | https://captchathecat.com/service/9kw ↗ |
Architectural Trade-offs & Selection Factors
Choosing between Captchas.io and 9kw.eu depends on the structural bottlenecks in your scraping or automation infrastructure.
High-speed automated scraping workflows where sub-3-second latency and minimal token cost are required.
Diverse multi-step visual challenges or legacy scraper integration where human verification fallback is essential.