What is userstack?

userstack is a simple but powerful REST API built to accurately detect the device, browser and operating system website visitors are using by parsing and interpreting User-Agent strings. The API is used by more than 10,000 companies around the world, including Zendesk, Intuit and Apple. To learn more, you can get a free API access key, take a look at the API Documentation and make your first API request today.

Who runs the API?

userstack is a product built and maintained by apilayer, a software company based in London, United Kingdom and Vienna, Austria. apilayer is the company behind some of the most popular API and SaaS products worldwide, including currencylayer, invoicely and eversign.

Where is the API's data coming from?

User-Agent detection by userstack is based on a proprietary database mapping of User-Agent strings with a complete set of devices, browsers and operating systems currently in use and on the market.

How often is User-Agent data refreshed?

Our database of User-Agent strings is updated multiple times a week, ensuring accurate and up-to-date User-Agent detection even for the most recently released hardware and software.

How scalable is this service?

The userstack API is powered by apilayer cloud infrastructure, a system some of the world's most popular real-time API services are running on, making it highly scalable and flexible at any step of the way.

What is the difference between free and paid subscriptions?

The userstack Free Plan is a way of getting familiar with the API, offering basic API functionality and a limitation of 100 monthly API lookups. As soon as you need a higher volume or advanced API features, you can choose from one of the premium subscriptions or contact us for a custom solution.

Which subscription plan fits my needs?

The most decisive factor when it comes to your technical requirements is the number of monthly User-Agent strings need processing per month. Other factors include HTTPS encryption and access to the Bulk Lookups and Crawler Detection features.

Signing up for the Free Plan is a great way of getting to know the API and implementing it without any commitments.

Which payment methods are supported?

Payments can be made via credit card (Visa, MasterCard, Discover, Diner's Club, American Express). Enterprise and high-volume customers may request annual bank transfer payments to be enabled. You can change your payment method at any given time in the "Payment" section of your account dashboard.

Can I also pay yearly?

Yes. If you choose annual billing, the total price of your subscription plan will be up to 15% lower than the total amount you would pay with a monthly payment frequency.

How do I cancel/downgrade?

You can initiate a cancellation or downgrade by selecting a new plan and providing at least one reason for your decision. The customer service team will cancel or downgrade your plan. Downgrades are not effective immediately; your premium subscription will remain active until the end of the current billing period.

How do I change between monthly and yearly billing?

To change your subscription from monthly to yearly billing, submit a request on the Contact Us page on the website following these steps:

Step 1: Sign in to your account

Step 2: Go to Contact Us page

Step 3: Fill out the form and choose the “Sales” category for this request.

Step 4: In the text box, include your specific request for example “Change from Monthly to Yearly subscription.”

What is included in Platinum Support?

Platinum Support includes dedicated account management, priority bug fixes, and access to exclusive support resources. It ensures you receive top-tier assistance for any issues you encounter, helping you maintain and optimize your system performance.

How much does Platinum Support cost?

The cost of Platinum Support varies depending on your subscription plan: - Standard Plan: $479.88 billed annually - Professional Plan: $599.88 billed annually - Professional Plus Plan: $719.88 billed annually - Enterprise Plan: Custom pricing billed annually

How do I select Platinum Support when purchasing a plan?

When you select a pricing plan, the Platinum Support option is automatically checked. You will see a checkbox next to “Include Platinum Support” with the corresponding annual price. You can uncheck this box if you do not wish to include Platinum Support.

How does Platinum Support appear on my invoice?

When you select Platinum Support, your invoice will display “Selected: [Your Plan] + Platinum Support.” The total amount charged will include the cost of your chosen plan and the annual fee for Platinum Support. For example, if you select the Professional Plan, your invoice will read “$59.99/month + $599.88/year for Platinum Support.”

Can existing customers upgrade to include Platinum Support?

Yes, existing customers can upgrade their plans to include Platinum Support. The option will be automatically checked when viewing available plans, showing the respective annual fee for Platinum Support. You can select or unselect this option as needed.

How is the billing period for Platinum Support handled?

The billing period for Platinum Support is annual. When you purchase Platinum Support, the renewal date will be one year from the purchase date. Your invoice will show the purchase date, renewal date, and the total annual amount for Platinum Support.

Can I opt out of Platinum Support during the purchase process?

Yes, Platinum Support is an optional service, you can uncheck the Platinum Support box during the purchase process if you prefer not to include it.

Can I switch back to standard support after upgrading to Platinum Support?

Yes, you can switch back to standard support at any time. However, the change will take effect at the start of your next billing cycle. Contact our support team to adjust your plan.