Choosing a CAPTCHA solving API isn't just about per-solve cost — in fact, the cheapest provider in 2025 doesn't charge per solve at all. CaptchaAI uses thread-based plans with unlimited solves per thread, while every other major provider charges per 1,000 solves. This guide compares both models head-to-head: published per-1K rates from competitors against CaptchaAI's flat-rate plans (and the effective per-1K cost they deliver at typical utilization).
Pricing Models at a Glance
| Provider | Pricing model | Starting price | What you pay for |
|---|---|---|---|
| CaptchaAI | Thread-based, unlimited solves | $15/month (BASIC, 5 threads) | A fixed monthly fee per concurrent solving thread — every CAPTCHA cleared on a running thread is free |
| 2Captcha | Per-solve | ~$2.99 / 1,000 reCAPTCHA | Each solved CAPTCHA |
| Anti-Captcha | Per-solve | ~$2.00–3.00 / 1,000 reCAPTCHA | Each solved CAPTCHA |
| CapSolver | Per-solve | ~$1.50–2.50 / 1,000 reCAPTCHA | Each solved CAPTCHA |
| CapMonster Cloud | Per-solve | ~$1.00–2.50 / 1,000 reCAPTCHA | Each solved CAPTCHA |
See CaptchaAI Pricing — Thread-Based Plan Breakdown for the full plan ladder (BASIC $15 → ENTERPRISE $300 → VIP-3 $7,500) and Thread-Based vs Per-Solve Pricing for the cost-model explainer.
Effective Per-1K Cost by CAPTCHA Type
For competitors, the number below is the published per-1K rate. For CaptchaAI, it's the effective per-1K cost (monthly plan price divided by typical monthly solve volume at sustained utilization).
reCAPTCHA v2
| Provider | Cost per 1,000 (effective) | Avg Speed | Success Rate |
|---|---|---|---|
| CaptchaAI | From ~$0.005 effective ($15/mo BASIC, 100K solves/mo) — falls further at scale | 10-20s | 95%+ |
| 2Captcha | $2.99 (per solve) | 20-60s | 90-95% |
| Anti-Captcha | $2.00-3.00 (per solve) | 15-45s | 90-95% |
| CapSolver | $1.50-2.50 (per solve) | 10-25s | 90-95% |
| CapMonster Cloud | $1.50-2.50 (per solve) | 10-25s | 90-95% |
reCAPTCHA v3
| Provider | Cost per 1,000 (effective) | Score Quality | Speed |
|---|---|---|---|
| CaptchaAI | From ~$0.005 effective at 100K solves/mo on BASIC | 0.7-0.9 (controllable) | 5-15s |
| 2Captcha | $2.99 (per solve) | 0.1-0.3 (unreliable) | 10-30s |
| Anti-Captcha | $2.50-3.50 (per solve) | 0.3-0.5 | 10-30s |
| CapSolver | $2.00-3.00 (per solve) | 0.5-0.7 | 8-20s |
Cloudflare Turnstile
| Provider | Cost per 1,000 (effective) | Success Rate | Speed |
|---|---|---|---|
| CaptchaAI | From ~$0.005 effective at 100K solves/mo on BASIC | 100% | <10s |
| 2Captcha | $2.99 (per solve) | 80-90% | 15-40s |
| Anti-Captcha | $2.00-3.00 (per solve) | 85-90% | 10-30s |
| CapSolver | $1.50-2.50 (per solve) | 85-95% | 8-20s |
Image/OCR CAPTCHA
| Provider | Cost per 1,000 (effective) | Types Supported |
|---|---|---|
| CaptchaAI | From ~$0.0006 effective at high utilization | 27,500+ |
| 2Captcha | $0.50-1.00 (per solve) | Standard only |
| Anti-Captcha | $0.70-1.50 (per solve) | Standard only |
| CapSolver | $0.50-1.50 (per solve) | Limited set |
BLS CAPTCHA
| Provider | Cost per 1,000 (effective) | Supported |
|---|---|---|
| CaptchaAI | Included in any plan — unlimited at thread cost | ✅ 100% accuracy |
| 2Captcha | — | ❌ Not supported |
| Anti-Captcha | — | ❌ Not supported |
| CapSolver | — | ❌ Not supported |
Total Cost Analysis
Per-solve pricing tells part of the story. Total cost depends on:
Factor 1: Failed Solves
Failed solves waste time and processing resources. You typically don't pay for failed solves on per-solve providers (and on CaptchaAI's thread model failed retries are always free), but your pipeline stalls either way:
Pipeline cost per page (with retries):
CaptchaAI (95% success, avg 1.05 attempts):
Solve cost: $0 marginal (thread already paid) — unlimited retries free
Pipeline time: 15s × 1.05 = 15.75s
2Captcha (90% success, avg 1.11 attempts):
Solve cost: $0.003 × 1.11 = $0.0033/page
Pipeline time: 40s × 1.11 = 44.4s
Factor 2: Speed Impact on Infrastructure
Faster solves = fewer concurrent connections = lower infrastructure costs:
| Daily Volume | Provider | Avg Wait | Concurrent Slots Needed |
|---|---|---|---|
| 100,000 | CaptchaAI (15s) | 15s | ~18 |
| 100,000 | 2Captcha (40s) | 40s | ~47 |
| 100,000 | Anti-Captcha (30s) | 30s | ~35 |
Fewer concurrent slots means fewer proxy connections, less memory, and smaller server requirements.
Factor 3: v3 Score Failures
If your target site uses reCAPTCHA v3 with a 0.5 threshold:
CaptchaAI (0.7-0.9 scores): 95%+ tokens pass threshold
2Captcha (0.1-0.3 scores): <20% tokens pass threshold
Effective cost for v3 validation:
CaptchaAI: thread plan flat fee — every retry on a running thread is free,
so a low pass rate doesn't multiply your bill
2Captcha: $0.003 / 0.20 = $0.0150 per successful validation
CaptchaAI is dramatically cheaper for v3 in practice because failed-score
retries are absorbed by the same thread — the per-solve providers re-charge
for every attempt.
Monthly Cost Projections
For CaptchaAI, the cost is the plan tier sized to peak concurrency, not the solve volume. Per-solve providers scale linearly with volume.
Small Scale (10,000 solves/month)
| Provider | reCAPTCHA v2 | Turnstile | Mixed |
|---|---|---|---|
| CaptchaAI | $15 (BASIC, 5 threads) | $15 | $15 |
| 2Captcha | $30 | $30 | $30 |
| Anti-Captcha | $20-30 | $20-30 | $25-35 |
| CapSolver | $15-25 | $15-25 | $15-25 |
Medium Scale (100,000 solves/month)
| Provider | reCAPTCHA v2 | Turnstile | Mixed |
|---|---|---|---|
| CaptchaAI | $15-30 (BASIC or STANDARD) | $15-30 | $15-30 |
| 2Captcha | $299 | $299 | $299 |
| Anti-Captcha | $200-300 | $200-300 | $200-300 |
| CapSolver | $150-250 | $150-250 | $150-250 |
Large Scale (1,000,000 solves/month)
| Provider | reCAPTCHA v2 | Turnstile | Mixed | Notes |
|---|---|---|---|---|
| CaptchaAI | $90-170 (ADVANCE or PREMIUM) | $90-170 | $90-170 | Cost set by peak threads, not volume |
| 2Captcha | $2,990 | $2,990 | $2,990 | Limited bulk pricing |
| Anti-Captcha | $2,000-3,000 | $2,000-3,000 | $2,500-3,500 | Enterprise tiers |
| CapSolver | $1,500-2,500 | $1,500-2,500 | $1,500-2,500 | Volume pricing |
Enterprise Scale (10,000,000+ solves/month)
| Provider | Monthly cost | Notes |
|---|---|---|
| CaptchaAI | $300–$7,500 | ENTERPRISE ($300, 200 threads) up to VIP-3 ($7,500, 5,000 threads) — sized to concurrent load, not volume |
| Per-solve providers | $15,000–30,000+ | Linear with solve count; volume discounts may reduce |
Hidden Costs to Consider
| Cost Factor | Description | Impact |
|---|---|---|
| Failed solve retries | Extra API calls for failed solves | 5-15% cost increase on per-solve providers; $0 on CaptchaAI threads |
| v3 score rejections | Token passes but score too low | Up to 5x cost increase on per-solve providers; absorbed by thread on CaptchaAI |
| Peak hour slowdowns | Longer solve times = more server time | Infrastructure cost increase |
| Missing CAPTCHA types | Need second provider for unsupported types | Double integration effort |
| API migration | Switching providers later | Engineering time cost |
Best Value by Use Case
| Use Case | Best Value | Why |
|---|---|---|
| reCAPTCHA v2 scraping | CaptchaAI | Thread-based plan absorbs retries for free |
| reCAPTCHA v3 validation | CaptchaAI | Only provider with reliable score control + free retries on failed scores |
| Cloudflare-protected sites | CaptchaAI | 100% Turnstile + Challenge support, unlimited solves per thread |
| Image CAPTCHA extraction | CaptchaAI | 27,500+ types, effective per-1K cost as low as ~$0.0006 at scale |
| Government portals (BLS) | CaptchaAI | Only provider with BLS support |
| Budget-constrained small projects | CaptchaAI | $15/mo BASIC plan covers most workloads, no per-solve fees |
| Enterprise with SLA needs | CaptchaAI | Consistent performance, flat-rate predictable billing |
FAQ
Which CAPTCHA solver is cheapest overall?
CaptchaAI is cheapest at any non-trivial volume because it bills the thread, not the solve. Per-solve providers (2Captcha, Anti-Captcha, CapSolver, CapMonster) scale linearly with traffic; CaptchaAI's flat $15–$300/month plans absorb unlimited solves per thread, so the effective per-1K cost falls as utilization rises and crosses below every per-solve provider at modest volume.
Do CAPTCHA solvers charge for failed attempts?
Most per-solve providers don't charge for failed solves, but you still pay for the retry that succeeds. CaptchaAI charges nothing extra for retries — the thread is already paid for, so every additional attempt on that thread is free.
Are there free CAPTCHA solving APIs?
Some providers offer free trials (CaptchaAI included). No production-grade service is fully free — solving CAPTCHAs requires computational resources.
Do prices change with volume?
Per-solve providers typically offer volume discounts. CaptchaAI doesn't need volume discounts because its pricing is already volume-independent within a plan — you size the plan to peak concurrent threads, then push unlimited volume through them. Contact CaptchaAI for VIP plans at very high concurrency (1,000+ threads).
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