Install Cap on VPS & Cloud Server | Cap VPS Hosting

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VyomCloud VPS plans with vCPU cores, RAM, storage and monthly price in Indian rupees
Plan	vCPU Cores	RAM (GB)	Traffic (TB)	Bandwidth (Mbps)	Storage (GB)	Monthly Price (₹)	Get Now
GPC.NANO02	1	2	0.50	100	20	₹360/mo Renews at the same price	Get Now
GPC.MICRO01	2	2	1.00	100	40	₹560/mo Renews at the same price	Get Now
GPC.MICRO02	2	4	2.00	250	40	₹1,040/mo Renews at the same price	Get Now
GPC.SMALL	4	8	5.00	250	80	₹1,600/mo Renews at the same price	Get Now
GPC.MEDIUM	4	16	10.00	500	160	₹2,640/mo Renews at the same price	Get Now
GPC.LARGE	8	16	10.00	500	160	₹3,200/mo Renews at the same price	Get Now
GPC.XLARGE01	8	32	30.00	500	320	₹6,800/mo Renews at the same price	Get Now
GPC.XLARGE02	16	64	60.00	1000	1024	₹10,000/mo Renews at the same price	Get Now
CPUO-MICRO	4	4	2.00	250	40	₹1,200/mo Renews at the same price	Get Now
CPUO-SMALL	8	8	5.00	500	80	₹1,760/mo Renews at the same price	Get Now
CPUO-MEDIUM	16	32	10.00	500	160	₹7,360/mo Renews at the same price	Get Now

All plans include full root access, 1 IPv4 + IPv6, DDoS protection and a 99.5% uptime SLA. Need something larger? Talk to sales.

What Is CAPTCHA Hosting?

Cap is an open-source, self-hosted CAPTCHA alternative designed to protect websites and applications from automated bots. Instead of relying on traditional image-based puzzles, Cap uses proof-of-work and instrumentation challenges to help distinguish legitimate users from automated requests.

Cap is open-source and self-hosted under the Apache 2.0 license, giving developers the ability to inspect, customize, and run the software on their own infrastructure.

A smooth-running Cap setup needs more than just installing Docker. You need a stable Linux environment with reliable access, proper HTTPS, and full root control over the server. That's exactly what VyomCloud provides.

Real-World Use Cases of Cap VPS Hosting

Self-hosted Cap can be used wherever your application needs protection against automated submissions and abusive requests.

Protect Website Forms

Add CAPTCHA verification to contact forms, registration forms, comment sections, and other public-facing forms to reduce automated submissions without forcing visitors through image puzzles.

Forms

Secure Login & Registration

Use Cap as part of your authentication flow to add an additional protection layer against automated login and registration attempts.

Authentication

Protect APIs

Add challenge verification to public APIs and endpoints where automated requests could create unnecessary load or abuse — using Cap's REST-based standalone mode.

APIs

Reduce Spam

Protect forms and user-generated areas of your website from automated spam without forcing visitors through complicated image-based puzzles.

Anti-Spam

Protect Free-Tier Resources

If your application provides free accounts, trials, downloads, or other limited resources, Cap can help reduce automated abuse of those resources.

Abuse Prevention

Privacy-Focused Applications

For applications where keeping user data away from third-party services is important, self-hosted Cap provides an alternative approach to externally hosted CAPTCHA systems.

Privacy

Replace Third-Party CAPTCHA

Move away from external CAPTCHA providers and keep verification entirely within infrastructure you own and control — no per-request fees or third-party dependencies.

Migration

Developer & API Integrations

Integrate server-side challenge verification with different application architectures using Cap's REST API and standalone mode.

Integration

Key Features of Cap VPS Hosting on VyomCloud

VyomCloud's VPS hosting gives you a complete Linux environment for running Cap — from Docker deployment to widget customization, REST API integration, and privacy-first verification.

01 · Deployment

Easy Cap Deployment

Install Cap on your VPS using its standalone Docker deployment. Docker provides a straightforward way to run the Cap server without building a complete application environment from scratch.

Official standalone Docker container
Deploy in minutes, not hours

02 · Privacy

Privacy-Focused Bot Protection

Cap is designed around privacy. Its self-hosted architecture keeps verification within infrastructure you control rather than sending visitor data to an external CAPTCHA provider.

No telemetry to external servers
Your server, your visitor data

03 · Challenges

Proof-of-Work Challenges

Cap uses proof-of-work challenges to make automated abuse more expensive while avoiding traditional visual CAPTCHA puzzles. Challenge computation can run in the browser, helping provide a less intrusive experience for genuine visitors.

No image puzzles for visitors
Browser-side challenge computation

04 · Widget

Lightweight CAPTCHA Widget

Cap is built to keep the client-side footprint small. Its official project describes the widget as approximately 20 KB, helping reduce the amount of JavaScript added to your website.

~20 KB widget footprint
Minimal impact on page performance

05 · Infrastructure

Self-Hosted Infrastructure

Run CAPTCHA directly on your VPS instead of relying entirely on a third-party CAPTCHA platform. You control the server, deployment, configuration, and integration with your applications.

No external CAPTCHA platform
Full control over server & data

06 · Customization

Customizable Deployment

Because Cap is open-source and self-hosted, developers can adapt the deployment and customize the experience according to their application's requirements — including visual properties such as colors, size, position, and icons.

Open-source under Apache 2.0
Customize widget appearance & behavior

07 · Integration

API-Friendly Integration

Cap provides server-side verification and a REST-based standalone mode, making it possible to integrate CAPTCHA verification with different application architectures.

REST API for challenges
Server-side verification support

08 · Scaling

Scalable VPS Resources

Start with the VPS resources your application needs and scale CPU, RAM, and storage as your website, API, or user base grows.

Upgrade CPU / RAM / storage anytime
No reinstall required when scaling up

Third-Party CAPTCHA Service vs. Self-Hosted Cap on VyomCloud

The verification goal is the same either way — the control and privacy isn't.

Factor	Third-Party CAPTCHA Service	RecommendedSelf-Hosted Cap on VyomCloud
Hosting model	Managed by provider	Hosted on your VPS
Data control	Depends on provider	Your server, your control
CAPTCHA type	Varies by provider	Proof-of-work & instrumentation
Third-party dependency	Required	Reduced
Customization	Provider-dependent	High — open source
Server access	Not applicable	Full root access
Infrastructure	Provider's platform	VyomCloud VPS
Scaling	Based on service limits	Upgrade VPS resources as needed
Deployment	Service setup	Self-host Cap on your server

Why Choose VyomCloud for Cap Hosting

Compare the best Cap VPS hosting plans in India — affordable pricing, enterprise-grade uptime, and a Linux environment built to run self-hosted CAPTCHA reliably.

Full Root Access

Get complete administrative access to your VPS so you can configure Docker, Cap, domains, SSL, firewall rules, and other server components according to your requirements.

Fast NVMe Storage

NVMe SSD storage provides responsive disk performance for your server and the applications running alongside Cap.

Reliable VPS Infrastructure

Run your CAPTCHA service on dedicated virtual resources instead of sharing application resources with traditional shared hosting environments.

Flexible Resource Scaling

As traffic and verification requests increase, you can upgrade your VPS resources to support your growing workload.

Docker-Ready Environment

Deploy Cap using Docker and keep the application environment isolated and easier to manage.

Server-Level Security

Configure firewall rules, access controls, SSL, and other server-level security measures directly on your VPS.

24/7 Technical Support

Get assistance when you need help with your VPS environment, deployment, networking, or server configuration.

India-Based Hosting Options

Choose a suitable VyomCloud data center location when keeping your application infrastructure closer to your users is important.

Ready to Install Cap on Your VPS?

Deploy Cap on a VyomCloud VPS and take control of your application's CAPTCHA infrastructure. Choose your VPS plan, deploy your server, and start building a privacy-focused bot protection setup for your website or API.

Choose Your VPS Plan

Trusted by Teams Running Self-Hosted CAPTCHA

Full-Stack Developer

We wanted to move off third-party CAPTCHA for privacy reasons. Cap on our VPS was up in under an hour, and the widget is so much lighter than what we had before.

SaaS Founder

Our free-tier signups were getting hammered by bots. Adding Cap to the registration flow cut the junk accounts dramatically, and our users never complain about the challenge.

Backend Engineer

The REST API made it easy to plug challenge verification into our Node services. Docker deployment was straightforward, and having root on the VPS meant we could tune everything ourselves.

Privacy Consultant

For clients who don't want visitor data leaving their infrastructure, self-hosted Cap is now our default recommendation. No telemetry, no third-party calls, full control.

Indie Hacker

I run Cap on the same VPS as my app and API. The overhead is tiny, the widget is fast, and I don't have to worry about per-request pricing on a third-party CAPTCHA.

Frequently Asked Questions

What is Cap?

Cap is a free, open-source, self-hosted CAPTCHA alternative that uses proof-of-work and instrumentation challenges instead of traditional visual CAPTCHA puzzles. It is designed to provide bot protection while keeping the deployment under your control.

Can I install Cap on a VPS?

Yes. Cap provides a standalone Docker deployment, making it possible to run the CAPTCHA server on a VPS or other infrastructure that supports Docker.

Why install Cap on a VPS instead of using a third-party CAPTCHA?

Self-hosting gives you greater control over the infrastructure where Cap runs. You can manage the server, configuration, integration, and deployment yourself rather than relying entirely on an external CAPTCHA provider.

Is Cap free to use?

Cap is open-source and available under the Apache 2.0 license. While the software itself is open-source, you still need infrastructure such as a VPS to run a self-hosted deployment.

Does Cap use traditional image CAPTCHAs?

No. Cap is designed to replace traditional visual CAPTCHA puzzles with proof-of-work and instrumentation challenges that can run in the browser.

Does Cap track visitors?

Cap's official documentation describes it as privacy-focused and states that its self-hosted deployment does not send telemetry to its servers.

Can Cap protect APIs?

Yes. Cap can be integrated with applications and APIs through server-side challenge verification. Its standalone mode also provides a REST API for creating and validating challenges.

Does Cap work with Docker?

Yes. The official Cap project recommends its standalone Docker container as a straightforward way to run Cap, particularly when using a language or framework outside its native JavaScript ecosystem.

Is Cap suitable for production websites?

Cap is designed as a self-hosted CAPTCHA and is used for protecting websites, forms, APIs, and other applications. Your VPS resources and server configuration should be selected according to your expected traffic and workload.

Can I customize Cap?

Yes. Cap is open-source and its official project supports customization of the widget, including visual properties such as colors, size, position, and icons.

Can I use a custom domain with my Cap instance?

Yes. You can point a domain or subdomain to your VPS and configure HTTPS so the Cap server and its widget run on your preferred URL.

Can I run Cap alongside other applications on the same VPS?

Yes. Cap is lightweight and can run alongside websites, APIs, databases, and other services on the same VPS, as long as your plan has enough CPU, RAM, and storage.

How much JavaScript does the Cap widget add to my page?

Cap's official project describes the widget as approximately 20 KB, which is designed to keep the client-side footprint small and reduce impact on page performance.

Can I upgrade my VPS plan later without reinstalling Cap?

Yes. If your traffic or verification workload grows, you can upgrade CPU, RAM, or storage on your VPS without reinstalling Cap or losing your configuration.

Does VyomCloud provide DDoS protection and a firewall for Cap VPS hosting?

Yes. Every VyomCloud VPS plan includes DDoS protection and a managed firewall. You also get full root access to configure additional firewall rules and security measures on the server itself.

Is Cap a good alternative to reCAPTCHA or hCaptcha?

Cap is an open-source, self-hosted alternative aimed at teams who want privacy-focused bot protection without relying on a third-party CAPTCHA platform. Whether it's the right fit depends on your application, traffic, and compliance requirements.

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