We stand with Ukraine to help keep people safe. Join us

Tags Wireless Networks

What Is ISP Throttling And How to Stop It

Are you really getting the Wi-Fi speed that you’re paying for? Through a process called throttling, your ISP can reduce your internet speed without even telling you. Learn what ISP throttling is, why your ISP does it, and how you can avoid it with tools like Clario’s dedicated VPN — it hides your online activity so you can evade forms of ISP throttling.

Table of contents

What is ISP throttling?

ISP throttling is the act of reducing your internet bandwidth or speeds by your internet service provider (ISP). It's used by your ISP to regulate network traffic, limit your data usage, or even deter you from visiting certain websites. ISP throttling often results in internet speeds that are slower than what service providers advertise to their customers.  


Your ISP may have legitimate reasons for internet throttling. There are some examples of ISP throttling that could improve your internet experience. On the other hand, ISPs can use throttling to prioritize certain customers and influence your internet activity.  


Here’s why ISPs use throttling:

  1. Stop network congestion
  2. Enforce data caps
  3. Paid prioritization
  4. Censorship

Internet throttling usage varies amongst ISPs. Generally, mobile data providers are more likely to use ISP throttling. Despite pressures on ISPs, they don’t usually inform their customers when they engage in it.  


Are you wondering what is internet throttling compared to ISP throttling? The terms are interchangeable.  

How does ISP throttling work?

ISP throttling works by limiting the speed of data that’s either ingoing to your device or outgoing to a network. Throttling can also work by limiting the total number of data sent or received at a given time — this is known as a data cap. For end users, the result is an overall slower internet experience.  


ISP throttling affects speed and bandwidth. Here’s the difference:  

  • Connection Speed: This refers to the rate of ingoing network traffic to your device and outgoing traffic to the internet. Gauged in Mbps.
  • Bandwidth Volume: This refers to the overall volume of data that can be transmitted over an internet connection at a set interval of time.

Why do ISPs throttle the internet?

ISPs throttle the internet primarily to help their networks run more efficiently and limit your data usage. However, your ISP can also use it to influence your internet activity and turn a profit. There are numerous reasons why ISPs throttle your internet — knowing them will help you detect if you’ve been targeted.  


Here’s why ISPs throttle your internet:  

Network congestion

A network flooded with requests will result in reduced speeds and limited access. Your ISP may use internet throttling to regulate crowded networks. By limiting bandwidth for some users, it enables more people to connect to a given network and overall better speeds for all.  


Internet throttling is also used to limit certain high-bandwidth activities like downloading torrents and streaming. Even if you pay for a certain amount of bandwidth, your ISP may throttle your internet if they deem your activity is straining their network.  

Data caps

ISPs allot a fixed amount of mobile data to you based on your plan. If you are nearing your monthly limit, your ISP may cap your data — by throttling your internet — to conserve what’s left. This can ultimately be helpful for preserving your remaining data.  

Paid prioritization  

Third-party companies like Amazon and Netflix can have their network traffic prioritized by paying extra to your ISP — giving them fast lanes direct to the servers. Unless you're also a prioritized customer, this results in throttling when connecting to sites and services that use fast lanes.  


Net neutrality is the principle that all internet traffic should be treated equally. Many countries — like the United States, China, and France — don’t have net neutrality laws. In these countries, a company can pay an ISP to throttle internet traffic on competitor services — while encouraging traffic to their own services.  


In some countries, ISPs are state-owned or closely associated with the government. In places like China and Iran, the government closely monitors internet traffic and uses throttling to censor unwanted content and ultimately control its population.  

How to stop ISP throttling?

You can’t outright stop ISP throttling — but you can avoid it. Understanding when and why your ISP uses throttling is a start. From there, you can use tools and strategies so that you can get the most out of the internet service that you pay for.


Here’s how to stop internet throttling:  

  1. Use a VPN. A Virtual Private Network (VPN) functions like a private tunnel between your device and the internet. It’s an encrypted connection, so no one can monitor your activity — even your ISP. Though a VPN can’t stop data caps or network regulations, it will evade activity-based throttling.

2. Upgrade your data plan. Though a pricier option, by upgrading your data plan, you can bypass ISP throttling without a VPN. An unlimited or higher monthly data allotment means no more data caps, plus a premium plan could prioritize your internet traffic by putting you in your ISP’s fast lane.  


3. Monitor your data. By keeping track of your monthly data usage, your ISP won’t have to use a data cap. Try to avoid activities that eat a lot of data, like streaming videos. Use public Wi-Fi, if you can — though be wary of its dangers.  


4. Switch ISPs: If you’re unhappy with your ISP and its policies, look for a new one with better network management policies. Understand what you need from a service provider, calculate your monthly data usage, and shop around. Just know, you may incur an “exit fee,” and your new ISP may still throttle to regulate network traffic.

How to test if your internet is being throttled?

There’s no direct way to test if your internet is being throttled. ISPs are secretive about throttling — plus, other factors besides throttling can slow your speeds. But although there’s no specific throttling test, there are indirect ways to tell if your internet is being throttled.  


Here’s how to test if your internet is being throttled:  

Perform a speed test

A free speed test, like M-Lab’s Speed Test, will measure your current internet speed. You can compare the result of this test with your data plan to determine if you are getting the speeds that you pay for. Note: this isn’t definitive evidence of ISP throttling.  

Test results from M-Lab's Speed test

Your current internet speed can fluctuate throughout the day. So run multiple tests at different times and use the results to calculate an average internet speed.  

Speed test with a VPN  

After running an initial speed test, connect to a VPN and run another speed test. A VPN hides your browsing activity from your IPS, helping you evade throttling based on your online activity.  


If speed test results with a VPN are markedly different from results without a VPN, you may be experiencing ISP throttling.  

How does a VPN solve throttling issues?

A VPN solves activity-based throttling issues by hiding your online activity from your ISP. VPNs work by encrypting your IP address, which stops your ISP from monitoring your online activity. When your ISP can’t see which websites and services you use, they can’t throttle your internet based on your activity.  


With Clario’s VPN you get:  

  • Anonymity from your ISP, hackers, and other prying eyes
  • Advanced encryption and IKEv2/IPsec VPN protocols
  • Freedom from content blocks

Here’s how to use Clario’s VPN:  

  1. Download Clario and set up an account
  2. On the home screen, toggle Browsing protection
  3. You can change your location by tapping the location — right below Browsing protection — and choosing a new location.
Toggling on the VPN in the Clario app. And choosing a new location VPN server location within the Clario app.

You’re all set. The VPN connection will stop ISP throttling based on activity. Changing your location also enables you to get away from content blocks, so you can enjoy the content that’s otherwise blocked in your region.  

How to stop ISP throttling without a VPN?

You can bypass ISP throttling without a VPN by using a web proxy that encrypts your traffic. Similar to a VPN, an encrypted web proxy hides your IP address from the websites you visit and your ISP, so they can’t monitor your online activity.  


Though it may be effective, the web proxy method has downsides. It only works if your proxy supports encryption — and proxies that offer encryption are rare. A manual set-up is possible, but the process can be challenging for someone with no technical background. Alternatively, many VPN services offer encrypted proxies automatically.  

Does bandwidth throttling affect mobile data

Yes, bandwidth throttling can affect mobile data by enforcing data caps, which place limits on your data usage. In fact, you’re more likely to experience ISP throttling over a mobile network compared to a home Wi-Fi or wired broadband network.  


Mobile data providers can use a soft cap to limit high-bandwidth activities, like streaming. Soft caps work by throttling your speeds once you use a certain amount of your monthly data. This isn’t necessarily bad, since it can help conserve your remaining data for the month.  


A VPN hides your outgoing traffic from your ISP, so it can help you avoid bandwidth throttling based on your mobile activity. But be aware that VPN usage itself uses mobile data.  

Should you be concerned about ISP throttling

Yes and no. You should be concerned about ISP throttling if your speeds are significantly less than you pay for or if it’s limiting you from a free and open internet. But throttling for network regulation or helping you manage data usage is standard and can be useful.  


Your ISP is most likely a profit-driven business. Besides providing you with internet service, it can also be involved with taking money from third-party companies to influence what websites and services you engage in. Net neutrality laws fight for an open internet that’s free from the influence of big business — but these laws are not universally accepted.  


If your country doesn't have net neutrality laws, you could be experiencing throttling paid for by corporate profiteering. You can try switching to a fairer ISP. Or use a VPN service, which lets you evade ISP throttling based on paid prioritization by hiding your internet activity.  

Is ISP throttling illegal

ISP throttling is not illegal. In the past, net neutrality laws prevented third-party businesses from influencing the internet traffic of ISPs. Today, many countries, like the USA, have repealed these laws. With that said, some examples of ISP throttling — based on network regulation and soft data caps — can be beneficial to end users overall.  

How to avoid ISP throttling

Though it’s difficult to completely avoid all forms of ISP throttling, a VPN is your best bet. Clario VPN provides powerful anonymity — effectively hiding you from your ISP to avoid throttling.  


A VPN is the best way you can stop internet throttling, but it offers much more. It helps prevent personal data theft, which could result in further malicious activity by hackers. VPNs also evade content restrictions, giving you wider access to all the internet has to offer.  

Keep reading

Want to stop ISP throttling?

Get started