Captchas.io vs. 9kw.eu
Objective architectural, pricing, and protocol comparison. Metrics reflect verified vendor specifications and our benchmark telemetry.
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 from our research and rate card verification (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 our benchmark 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 |
| Observed Benchmark Latency | Not in Active Benchmark Sample | Not in Active Benchmark Sample |
| Benchmark Sample Completion | Not in Active Benchmark Sample | Not in Active Benchmark Sample |
| Editorial Rating & Rank | 7.1 / 10 (Editorial Rating) | 7.7 / 10 (Editorial Rating) |
| Source Documentation Reference | https://captchas.io/ ↗ | https://www.9kw.eu/ ↗ |
- Vendor Stated Claims: Self-reported figures from official provider documentation under optimal network conditions. For automated AI services (e.g. CapSolver, CapMonster Cloud), sub-3s claims reflect token-based workflows (e.g. reCAPTCHA v2 or Turnstile). For human-assisted platforms (e.g. 2Captcha), vendor figures represent workforce queue turnaround across all challenge formats.
- SolversReview Benchmark Telemetry (Oct 2026): Sample probe measurements recorded during our benchmark tests. 2Captcha was sampled on Normal Image OCR (~4.91s), Google reCAPTCHA v2 (~14.0s, 100% sample completion), and Cloudflare Turnstile (~2.98s, 100% sample completion). Providers not included in the active probe sample rotation are marked accordingly.
Architectural Trade-offs & Selection Factors
Choosing between Captchas.io and 9kw.eu depends on the structural bottlenecks in your scraping or automation infrastructure.
High-volume bulk OCR using dedicated monthly threads.
Hobbyist and open-source automation using mutual credit exchange.