Switch from Anti-Captcha to CaptchaAI for a simpler API and a free trial to test first.
Same submit-then-poll pattern — but a plain REST API instead of JSON task objects, thread-based pricing with unlimited solves per thread, and full Cloudflare Challenge, BLS & grid coverage Anti-Captcha doesn't offer. Try it on a free trial before you move a line of production traffic.
# Anti-Captcha: build a JSON task object - requests.post("https://api.anti-captcha.com/createTask", json={ - "clientKey": KEY, - "task": {"type": "RecaptchaV2TaskProxyless", - "websiteURL": url, "websiteKey": sitekey}}) # CaptchaAI: plain REST query params + requests.get("https://ocr.captchaai.com/in.php", params={ + "key": KEY, "method": "userrecaptcha", + "googlekey": sitekey, "pageurl": url})
A small field mapping — the submit-then-poll flow stays the same.
Solves the full modern CAPTCHA stack
Two things developers reconsider
Anti-Captcha is fast. At volume, two things start to matter.
Anti-Captcha returns quick best-case solve times and covers the standard types well. But its per-solve billing means 10× the traffic is 10× the bill, its JSON task API adds request plumbing, and there's no free trial to validate on your own targets first. Here's what changes on CaptchaAI.
Why teams move
Five reasons developers switch from Anti-Captcha
1. Thread-based, not per-solve
Pay per concurrent thread with unlimited solves per thread each month. At steady volume the effective cost per solve keeps dropping instead of scaling linearly with traffic.
2. Plain REST API
Submit with GET/POST query parameters — no JSON task objects to
construct. You can test a call straight from a browser or curl.
3. Full Cloudflare Challenge
Cloudflare Turnstile and the full-page Challenge with a
returned cf_clearance cookie — Anti-Captcha covers Turnstile only.
4. BLS & grid image
BLS multi-image CAPTCHA for visa-appointment portals and custom grid-select challenges — types Anti-Captcha has no equivalent for.
5. Free trial to test first
Validate CaptchaAI on your own targets with a 3-day free trial before committing. Anti-Captcha has no free trial — you fund an account to evaluate.
Same workflow + free retries
Submit a task, poll for the result — identical control flow. Failed solves are retried automatically at no extra charge.
Migration
Map the fields, keep the workflow
CaptchaAI doesn't emulate Anti-Captcha's JSON format — but the submit-then-poll flow is the same. Convert the task object to query parameters and switch your response parsing from JSON to CaptchaAI's REST response.
createTask→in.php,getTaskResult→res.php?action=get"type":"RecaptchaV2TaskProxyless"→method=userrecaptchawebsiteKey→googlekey,websiteURL→pageurl- Parse the REST response instead of
solution.gRecaptchaResponse
import requests, time API_KEY = "YOUR_CAPTCHAAI_KEY" API_URL = "https://ocr.captchaai.com" def solve_recaptcha(sitekey, pageurl): # Submit (was Anti-Captcha createTask) r = requests.get(f"{API_URL}/in.php", params={ "key": API_KEY, "method": "userrecaptcha", "googlekey": sitekey, "pageurl": pageurl, "json": 1, }) task_id = r.json()["request"] # Poll (was Anti-Captcha getTaskResult) for _ in range(60): time.sleep(5) res = requests.get(f"{API_URL}/res.php", params={ "key": API_KEY, "action": "get", "id": task_id, "json": 1, }).json() if res["request"] != "CAPCHA_NOT_READY": return res["request"] raise TimeoutError("Solve timeout") # Start a free trial at captchaai.com/trial to get your API key
Side by side
CaptchaAI vs Anti-Captcha
Capability coverage. Solve metrics are benchmarked — see the evidence note.
| Feature | CaptchaAI | Anti-Captcha |
|---|---|---|
| reCAPTCHA v2 / v3 / Enterprise | ||
| Cloudflare Turnstile | ||
| Cloudflare Challenge (full page) | ||
| GeeTest | v3 | v3 / v4 |
| Image / OCR types | 27,500+ | Yes |
| BLS CAPTCHA | ||
| Grid image CAPTCHA | ||
| Best-case reCAPTCHA v2 solve time | under 60s | 15–25s |
| Free retries on failed solves | — | |
| API style | REST (query params) | JSON POST tasks |
| Billing model | Per thread (unlimited solves) | Per solve |
| Free trial |
Where Anti-Captcha is strong: faster best-case solve times on standard reCAPTCHA and GeeTest v4 support. If raw latency on standard types is your priority, it's a solid choice. For Cloudflare Challenge, BLS, grid work, predictable cost at volume, and a free trial to test first, CaptchaAI is the stronger match.
Illustrative pipeline
What changes day to day
Representative example for a high-volume reCAPTCHA pipeline. Your numbers depend on target sites and proxy quality.
Before — Anti-Captcha (per-solve, JSON)
After — CaptchaAI (REST, thread-based)
Pricing
Pay per thread. Unlimited solves.
A thread is one in-flight CAPTCHA. It frees up the moment it finishes — so you size by concurrency, not by solve count. No per-CAPTCHA fees, no type surcharges.
Larger plans — CORPORATE ($240/mo, 150 threads), ENTERPRISE ($300/mo, 200 threads), and VIP tiers up to 5,000 threads. See full pricing →
Where the gap widens at scale
| Monthly reCAPTCHA v2 volume | Anti-Captcha (per-solve) | CaptchaAI plan | CaptchaAI cost | You save |
|---|---|---|---|---|
| 10,000 solves | ~$18 | BASIC (5 threads) | $15 | ~17% |
| 100,000 solves | ~$180 | BASIC (5 threads) | $15 | ~92% |
| 1,000,000 solves | ~$1,800 | ADVANCE (50 threads) | $90 | ~95% |
| 10,000,000 solves | ~$18,000 | ENTERPRISE (200 threads) | $300 | ~98% |
Illustrative. Anti-Captcha column uses its published reCAPTCHA v2 rate (~$1.80 / 1,000 solves, accessed May 2026); CaptchaAI plans are sized to peak concurrency, not total volume. Once threads are paid for, additional volume runs through them at zero marginal cost. Confirm live numbers on captchaai.com/#pricing-plans.
FAQ
Frequently Asked Questions
No — CaptchaAI uses REST query parameters (in.php / res.php) rather than Anti-Captcha's JSON createTask API. But the workflow is identical (submit a task, poll for the result), so migration is updating endpoints, mapping a few field names, and switching response parsing.
For a single integration point it's usually quick — convert the JSON task object to query parameters (type → method, websiteKey → googlekey, websiteURL → pageurl) and switch your response parsing. The submit-then-poll control flow stays the same.
Yes. Many developers run CaptchaAI as the primary solver and keep Anti-Captcha as a fallback. The integration patterns are similar enough that a simple try/catch wrapper handles failover.
Yes — and this is a difference from Anti-Captcha, which has no free trial. Every new CaptchaAI account gets a 3-day free trial with 5 threads — claim it here. Run both solvers in parallel on the same workload, compare on your real targets, then cut over when you're satisfied.
On standard reCAPTCHA, Anti-Captcha often returns faster best-case times (around 15–25s for reCAPTCHA v2). CaptchaAI prioritizes consistent solvatically at no extra charge. If raw best-case latency on standard types is your top priority, weigh that in your test.
CaptchaAI covers the full-page Cloudflare Challenge (returning a cf_clearance cookie), BLS multi-image CAPTCHA, and custom grid-select challenges. Anti-Captcha supports Turnstile only and has no BLS or grid equivalent. Anti-Captcha in turn adds GeeTest v4 support.
Need more help? Check CaptchaAI Help Center
Ready to switch? Test it free, then map the fields.
Claim a 3-day free trial, point your solver at ocr.captchaai.com,
and run a real solve. Keep Anti-Captcha alongside until you're confident.
Evidence & sources
Capability coverage and solve-time ranges are from CaptchaAI's published supported CAPTCHA types (api-docs) and the comparison at blog.captchaai.com/captchaai-vs-anti-captcha. Anti-Captcha's lack of full Cloudflare Challenge / BLS / grid support and its faster best-case reCAPTCHA v2 times (15–25s) are stated there.
Cost examples use published CaptchaAI plans (captchaai.com/#pricing-plans) and Anti-Captcha's published reCAPTCHA v2 rate (~$1.80 / 1,000), both accessed May 2026. Pricing and supported types change over time — confirm current numbers before relying on them. Solve times are representative, not guaranteed; results vary by target site and proxy quality.
