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Castle VS Approximated

Compare Castle VS Approximated and see what are their differences

Castle

The easiest way to protect your users from getting hacked

Castle Landing page
Rating
0 reviews
Alternatives Is it good?
Approximated

Reliably automate custom domains at scale with SSL for SAAS, marketplaces, platform, and web apps

Approximated Landing page
Rating
0 reviews
Pricing
Paid Free trial $20 / Monthly ($20 minimum, 20 cents per custom domain, volume discounts)
Alternatives Is it good?
OutageDeck
Check the cloud and SaaS vendors your product depends on without opening every status page. Official-source timelines, observed uptime history, and alerts to email, Slack, Teams, Discord, or webhooks. Five-provider email alerts are free. sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Which is more popular?

Castle might be a bit more popular than Approximated. We know about 4 links to it since March 2021 and only 3 links to Approximated.

social mentions
4 vs 3
Security & Privacy popularity
100% vs 0%
alternatives listed
240+ vs 58

Base details

Website, pricing, platforms and company facts side by side.

Castle
Approximated
Website castle.io approximated.app
Pricing
Official pricing
Paid Free trial $20 / Monthly ($20 minimum, 20 cents per custom domain, volume discounts) Official pricing
Company — 2021
Listed in
Antivirus Security Security & Privacy Privacy +1
SSL Certificates DevOps Tools IaaS API +1

About Castle and Approximated

In their own words, as submitted to SaaSHub.

Castle
Approximated

No description of Castle yet.

Easy to setup, simple to automate Approximated treats convenience and simplicity as a first class citizen, going the extra mile to make every step as easy as possible to integrate. How it works Approximated creates a dedicated cluster just for you, with edge servers in regions all over the world....

Read more about Approximated

Features and specs

What each product offers, as listed by its team.

Castle 5 features
Approximated 7 features
  • Comprehensive Security
    Castle provides robust security features, including real-time threat detection and response, which help safeguard against a range of online threats.
  • Ease of Integration
    Castle offers straightforward API documentation and support for multiple programming languages, which makes it easy to integrate into existing systems.
  • User Behavior Tracking
    The platform's ability to monitor and analyze user behavior can help in identifying suspicious activities and enhancing overall security.
  • Customizable Rules
    Users can create custom security rules tailored to the specific needs of their applications, allowing for more precise threat prevention.
  • Scalability
    Castle's infrastructure is designed to handle varying levels of traffic, making it suitable for both small businesses and large enterprises.

Possible disadvantages

  • Cost
    The advanced features and comprehensive security solutions provided by Castle can be expensive, which may be a drawback for smaller businesses with limited budgets.
  • Complexity
    While Castle offers a range of powerful features, the platform's complexity may require a steep learning curve for new users.
  • Potential Overhead
    Implementing and maintaining Castle's security solutions may add extra overhead to development and operational processes.
  • Dependency on Third-Party Service
    Relying on an external security service means that any downtime or issues with Castle could impact the security of the integrated applications.
  • Dedicated clusters
  • Dedicated IPv4 per cluster
  • Globally distributed cluster nodes for low latency
  • Automatic SSL certificate provisioning/renewal
  • Automatic monitoring
  • Unlimited custom domains
  • Unlimited target hosts/servers/origins

Analysis

An editorial look at what each product does well and who it suits.

Castle
Approximated

Overall verdict

  • Castle is a well-regarded solution in the security space, known for its user-friendly interface and effectiveness in preventing unauthorized access and reducing fraud risk. It is considered a good choice for businesses seeking to enhance their security protocols.

Why this product is good

  • Castle provides security solutions that focus on protecting user accounts and preventing fraud. It offers features such as anomaly detection, user monitoring, and real-time alerts to help businesses secure their applications and data. The platform is particularly useful for companies that prioritize user security and privacy.

Recommended for

  • E-commerce platforms
  • Financial services
  • Online businesses
  • SaaS providers
  • Organizations focusing on user account security

No analysis of Approximated yet.

Videos

Walkthroughs and reviews on video.

Castle 3 videos + Add
Approximated 0 videos + Add

Kingdom Come, Deliverance, CASTLE review

More videos

  • Review - Castle TV Series Review
  • Review - What Really Went Wrong on Castle

No Approximated videos yet. You could help us improve this page by suggesting one.

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
Castle
Approximated
100% 100%
Security & Privacy
0% 0%
0% 0%
SSL Certificates
100% 100%
100% 100%
Security
0% 0%
0% 0%
API
100% 100%

Questions & Answers

As answered by people managing Castle and Approximated.

What makes your product unique?

Approximated's answer:

Approximated makes it extremely easy to add a custom domains feature to any web app, SAAS, marketplace, or platform.

Often, companies can be integrated and live within a few days or less. It's very cost effective, making use of economies of scale and expertise to offer a complete solution at a tiny fraction of the cost to build the same features in house.

Why should a person choose your product over its competitors?

Approximated's answer:

Approximated is both easier to integrate, and more cost effective than competitors.

It offers all of the features you care about without building in the cost of those that you don't:

  • Hours or days to integrate, instead of weeks or months
  • You can start small, at a very low price
  • You can scale up to any size without any extra steps
  • You get automatic volume discounts as you scale up, instead of being forced into various enterprise agreements
  • Talk to real developers on staff instead of sales people, if you want
  • Your cluster is dedicated only to you, instead of shared with everyone else like competitors

How would you describe the primary audience of your product?

Approximated's answer:

Startups, Scale-ups, dev teams, and devops teams who want to get a custom domains feature launched this week, with rock solid reliability and genuine developer support.

User comments

Share your experience with using Castle and Approximated. For example, how are they different and which one is better?

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Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

Castle 4 mentions
Approximated 3 mentions
  • Precursor
    This (agent detection) is now a kind of emerging space. Obviously it'll get much more important, too. Other products in the space: - Foil (https://usefoil.com/), I'm biased, a friend is building this - Kasada https://www.kasada.io/ -... - Source: Hacker News / 2 months ago
  • Ask HN: Who is hiring? (April 2025)
    Castle (https://castle.io) | Senior ML Engineer | Senior R&D Detection Engineer | REMOTE (Europe/EMEA) | Full-time Hi HN! I’m Antoine, Head of Research at Castle. We’re a YC-backed Series A startup helping companies like Canva,... - Source: Hacker News / over 1 year ago
  • If you need help with distrokid related issues inbox me i used to work for distrokid
    Tell me about the fingerprint, they using castle.io within segment.com ? Or something else? And what they watching? Source: over 3 years ago

View more

  • Ask HN: What Are You Working On? (March 2026)
    Https://approximated.app It makes connecting user domains to your app easy and reliable at any scale. Each Approximated user gets the own globally distributed, managed cluster of servers with its own dedicated IPv4 address. Includes... - Source: Hacker News / 6 months ago
  • Ask HN: What are you working on (September 2024)?
    Https://approximated.app - reliably automating custom domains and their SSL certs at scale. For SaaS, marketplaces, platforms, outbound services, etc. Who have a lot of customers that want to connect their own domains. Currently working... - Source: Hacker News / almost 2 years ago
  • How to support user custom domains with Next.js
    It's why we built Approximated - so that you don't have to. And at a price you can afford, starting at $20/month instead of thousands. - Source: dev.to / over 2 years ago

Alternatives to Castle and Approximated

When comparing Castle and Approximated, you can also consider the following products.

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