The Best CAPTCHA Software in 2026
Cloudflare Turnstile should be your first pick: its free tier permits 20 widgets, unlimited challenges, and server-side token checks, giving teams a low-friction web CAPTCHA. It is also the best free option, allowing 10 hostnames per widget. The cheapest paid options are MightyCaptcha at $4 a month and Private Captcha at EUR 5 a month, both billed monthly. For teams protecting both websites and Android apps, Google reCAPTCHA is a strong fit because it combines score, checkbox, and invisible checks with up to 10,000 monthly assessments in its Essentials allowance. Friendly Captcha suits buyers wanting invisible protection across web and mobile; its background proof-of-work avoids image-labeling tasks. Small teams that prefer to run their own request-level defenses can choose Anubis, which offers configurable proof-of-work difficulty, reverse-proxy deployment, and rules that can permit, reject, or test incoming requests. Among euro-priced monthly plans, starting prices run from EUR 5 (Private Captcha) to EUR 18.90 (ALTCHA).
Our top picks
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Top ranked
Cloudflare Turnstile#1 of 329.4/10A free CAPTCHA alternative with adaptive checks, invisible modes and server-side validation.
Free plan
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Runner-up
Google reCAPTCHA#2 of 329.2/10Adaptive bot protection with web and Android options and a free monthly allowance.
Free plan
-
Top-ranked free plan
Friendly Captcha#4 of 328.9/10Background proof-of-work challenges suit teams seeking accessible, privacy-minded bot protection.
Free plan · 30-day trial
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
The full ranking 32 tools, best first
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Best forTeams wanting a free, low-friction web CAPTCHA
A free CAPTCHA alternative with adaptive checks, invisible modes and server-side validation.
- Privacy controls
- Accessibility options
9.4/10★★★★★Visit Cloudflare -
Best forTeams protecting websites and Android apps from bots
Adaptive bot protection with web and Android options and a free monthly allowance.
- Audio challenge
- Accessibility options
9.2/10★★★★★Try Google reCAPTCHA -
Best forBusinesses needing configurable, high-volume CAPTCHA
A managed CAPTCHA service with regional per-call pricing and policy controls.
9.0/10★★★★☆Visit Alibaba Cloud -
Best forTeams seeking invisible CAPTCHA across web and mobile
Background proof-of-work challenges suit teams seeking accessible, privacy-minded bot protection.
- Privacy controls
- Accessibility options
Free plan · 30-day trial Our Friendly Captcha verdict → Try Friendly CaptchaFor vendors Sponsor this spot · #4 · $69/mo →8.9/10★★★★☆Try Friendly Captcha -
Best forOrganizations seeking visual challenges and managed support
A cloud CAPTCHA service for web and H5 flows that need adaptive visual challenges.
8.7/10★★★★☆Visit Baidu Cloud -
Best forWeb and mobile teams needing varied challenge options
A cloud CAPTCHA service combining invisible checks with visual, audio, and proof-of-work defenses.
- Audio challenge
- Accessibility options
8.6/10★★★★☆Visit Tencent Cloud -
Best forMobile apps needing accessible, risk-aware challenges
Mobile CAPTCHA with adaptive difficulty, accessible challenges and configurable SDKs.
- Audio challenge
- Privacy controls
- Accessibility options
8.4/10★★★★☆Visit site -
Best forSmall teams self-hosting request-level bot challenges
A free, open-source reverse proxy for operators who want request-level bot challenges.
8.2/10★★★★☆Visit Anubis -
Best forTeams needing CAPTCHA plus account-abuse controls
A CAPTCHA and risk-control platform for teams tackling account and API abuse.
8.1/10★★★★☆Visit hCaptcha -
Best forTeams wanting adaptive challenges across web and mobile
Risk-based CAPTCHA with invisible checks, multiple challenges and web and mobile SDKs.
- Audio challenge
- Accessibility options
8.0/10★★★★☆Visit GeeTest -
Best forTeams needing adjustable web and mobile risk checks
Adjustable bot checks with a 10,000-request monthly free allowance.
- Audio challenge
- Privacy controls
- Accessibility options
7.9/10★★★★☆Visit Yandex Cloud -
Best forSmall teams prioritizing privacy and accessible CAPTCHA
Adaptive bot detection with invisible challenges, accessibility support and EU hosting.
- Audio challenge
- Privacy controls
- Accessibility options
7.8/10★★★★☆Visit CaptchaFox -
Best forDevelopers who want open-source or self-hosted CAPTCHA
An open-source CAPTCHA with flexible cloud, self-hosted, and WordPress options.
- Audio challenge
- Privacy controls
- Accessibility options
7.7/10★★★★☆Visit ALTCHA -
Best forTeams prioritizing privacy and accessible challenges
A privacy-minded CAPTCHA with accessible checks and familiar verification compatibility.
- Privacy controls
- Accessibility options
7.6/10★★★★☆Visit PrivCaptcha -
Best forTeams wanting many challenge types and self-hosting
Adaptive CAPTCHA with many challenge types, privacy controls and a self-hosted option.
- Audio challenge
- Privacy controls
- Accessibility options
7.5/10★★★★☆Visit ShieldCaptcha -
Best forEnterprises combining CAPTCHA with fraud prevention
Enterprise bot challenges and fraud decisioning span accounts, payments, and SMS/OTP.
7.4/10★★★★☆Visit Arkose Labs -
Best forDevelopers self-hosting compatible CAPTCHA endpoints
An open-source CAPTCHA with multiple bot-detection methods and compatible verification endpoints.
- Privacy controls
- Accessibility options
7.3/10★★★★☆Visit FCaptcha -
Best forTeams wanting free, self-hosted proof-of-work CAPTCHA
A free, open-source CAPTCHA built around configurable SHA-256 proof-of-work.
- Privacy controls
- Accessibility options
7.2/10★★★★☆Visit mCaptcha -
Best forTeams seeking private managed or self-hosted checks
Adaptive, invisible bot checks with managed and self-hosted deployment options.
- Privacy controls
- Accessibility options
7.1/10★★★★☆Try Private Captcha -
Best forTeams needing audio, risk scoring, and framework SDKs
A CAPTCHA service with audio challenges, risk alerts, APIs, and framework components.
- Audio challenge
- Privacy controls
- Accessibility options
7.0/10★★★★☆Visit MTCaptcha -
Best forTeams self-hosting image and audio CAPTCHA
A configurable CAPTCHA component for teams that want self-hosting and localized audio challenges.
- Audio challenge
- Privacy controls
- Accessibility options
6.9/10★★★☆☆Visit BotDetect -
Best forTeams wanting inexpensive visual puzzle challenges
Web CAPTCHA with visual and invisible challenges and usage-based pricing.
- Privacy controls
- Accessibility options
6.8/10★★★☆☆Visit Lemin CAPTCHA -
Best forSmall websites using proof-of-work checks
A focused CAPTCHA service with a free plan and paid tiers from $4 per month.
- Privacy controls
6.7/10★★★☆☆Visit MightyCaptcha -
Best forPrivacy-focused developers self-hosting a web CAPTCHA
A privacy-focused web CAPTCHA for teams prepared to host and operate it themselves.
- Privacy controls
- Accessibility options
6.6/10★★★☆☆Visit Cap -
Best forSmall sites seeking simple proof-of-work protection
A focused CAPTCHA API for sites that prefer browser proof-of-work to puzzles.
- Privacy controls
6.5/10★★★☆☆Visit captchaapi.eu -
Best forWeb teams wanting behavioral and visual checks
A web CAPTCHA combining behavioral scoring, invisible checks, and visual challenges.
- Privacy controls
- Accessibility options
6.3/10★★★☆☆Visit Stitex -
Best forSmall sites needing configurable form CAPTCHA
Flexible form protection with visual, invisible and email-code options.
- Privacy controls
- Accessibility options
6.2/10★★★☆☆Visit POWER CAPTCHA -
Best forTeams needing accessible checks with AI detection
Flexible bot checks with accessibility support, starting at $79 per month.
- Privacy controls
- Accessibility options
6.1/10★★★☆☆Visit GateKeeper -
Best forDjango developers adding a free form CAPTCHA
A focused, self-hosted CAPTCHA component for Django forms, with visual and audio options.
- Audio challenge
- Accessibility options
6.0/10★★★☆☆Visit site -
Best forSmall sites wanting a simple, privacy-minded widget
A free, privacy-minded CAPTCHA widget for small sites, with limited challenge types.
- Privacy controls
- Accessibility options
5.9/10★★★☆☆Visit Szymdows -
Best forWordPress sites needing a basic free image CAPTCHA
A free, open-source visual CAPTCHA for WordPress sites that can use Contact Form 7.
5.8/10★★★☆☆Visit site -
Best forPeople needing a free desktop video editor
Avidemux is a free video editor, not a CAPTCHA solution.
5.6/10★★★☆☆Visit Avidemux
No tools match those filters.
Compare at a glance
| # | Tool | Free plan | Paid from | Audio challenge | Accessibility options | SDK platforms | Score |
|---|---|---|---|---|---|---|---|
| 1 | Cloudflare Turnstile | Yes | No | Yes | Both | 9.4 | |
| 2 | Google reCAPTCHA | Yes | Yes | Yes | Both | 9.2 | |
| 3 | Alibaba Cloud CAPTCHA | No | $0.0007/unit usage-based | Both | 9.0 | ||
| 4 | Friendly Captcha | Yes | €9/mo | No | Yes | Both | 8.9 |
| 5 | Baidu Cloud CAPTCHA | No | Web | 8.7 | |||
| 6 | Tencent Cloud Captcha | No | Yes | Yes | Both | 8.6 | |
| 7 | NetEase Yidun CAPTCHA | Yes | Yes | Mobile | 8.4 | ||
| 8 | Anubis | Yes | Free | 8.2 | |||
| 9 | hCaptcha Bot Detection | Yes | $99/mo | 8.1 | |||
| 10 | GeeTest CAPTCHA | No | Yes | Yes | Both | 8.0 | |
| 11 | Yandex SmartCaptcha | Yes | Yes | Yes | Both | 7.9 | |
| 12 | CaptchaFox | Yes | €15/mo | Yes | Yes | Web | 7.8 |
| 13 | ALTCHA | Yes | €18.90/mo | Yes | Yes | Both | 7.7 |
| 14 | PrivCaptcha | Yes | No | Yes | Both | 7.6 | |
| 15 | ShieldCaptcha | Yes | Free | Yes | Yes | Web | 7.5 |
| 16 | Arkose Labs Fraud and Abuse Prevention | 7.4 | |||||
| 17 | FCaptcha | Yes | Free | No | Yes | Web | 7.3 |
| 18 | mCaptcha | Yes | Free | No | Yes | Web | 7.2 |
| 19 | Private Captcha | No | €5/mo | No | Yes | Web | 7.1 |
| 20 | MTCaptcha | Yes | $25/mo | Yes | Yes | Both | 7.0 |
| 21 | BotDetect CAPTCHA | Yes | $19.90/mo | Yes | Yes | Web | 6.9 |
| 22 | Lemin CAPTCHA | Yes | $0.001/unit usage-based | Yes | Web | 6.8 | |
| 23 | MightyCaptcha | Yes | $4/mo | No | Web | 6.7 | |
| 24 | Cap | Yes | Free | No | Yes | Web | 6.6 |
| 25 | captchaapi.eu | Yes | €9/mo | No | Web | 6.5 | |
| 26 | Stitex Captcha | Yes | No | Yes | Web | 6.3 | |
| 27 | POWER CAPTCHA | Yes | €49/site/yr | No | Yes | Web | 6.2 |
| 28 | gkCAPTCHA | No | $79/mo | Yes | Web | 6.1 | |
| 29 | Django Simple Captcha | Yes | Free | Yes | Yes | Web | 6.0 |
| 30 | Szymdows CAPTCHA | Free | No | Yes | Web | 5.9 | |
| 31 | Really Simple CAPTCHA | Yes | Free | No | No | Web | 5.8 |
| 32 | Avidemux | Yes | Free | 5.6 |
Head-to-head All 28 comparisons →
- Cloudflare Turnstile vs Google reCAPTCHA
- Cloudflare Turnstile vs Alibaba Cloud CAPTCHA
- Cloudflare Turnstile vs Friendly Captcha
- Cloudflare Turnstile vs Baidu Cloud CAPTCHA
- Cloudflare Turnstile vs Tencent Cloud Captcha
- Cloudflare Turnstile vs NetEase Yidun CAPTCHA
- Cloudflare Turnstile vs Anubis
- Google reCAPTCHA vs Alibaba Cloud CAPTCHA
- Google reCAPTCHA vs Friendly Captcha
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How we rank CAPTCHA software
Every tool on this page was researched by iTechGuides Editors from its official website — pricing pages, plan tables and product documentation. We rank on how well each one does this category's core job, what the free or entry plan includes, and where it falls short. Where we have enough verified facts, the score out of 10 is a rubric — job fit, value and how much we could verify — shown with its breakdown on every tool's page; a tool we have not verified enough to score yet shows its rank without a number. Scores are re-checked when a product changes its plans. Read the full editorial policy, or submit a tool we missed.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update