Cookie Notice
Last Updated: November 5, 2025
This Cookie Notice describes how Ahrefs Pte Ltd ("Ahrefs") (UEN No. 201227417H) of 16 Raffles Quay #33-03 Hong Leong Building Singapore 048581 uses cookies and similar technologies to collect and store information when you visit our websites and/or use our services. It supplements our Privacy Policy.
When you use our website and/or use our services, we and selected third parties may use cookies and similar technologies in order to provide you with a better, faster and safer user experience.
1. What are cookies and similar technologies?
a) Cookies
Cookies are small text files (typically made up of letters and numbers) that are automatically created by your browser and stored on your device. Cookies allow for recognition of a specific device or browser. Other tracking technologies include web beacons, Java Scripts, entity tags, and HTML5 local storage.
- We use cookies that remain on your device only as long as your browser is active (session cookies), as well as cookies that remain on your device longer (persistent cookies).
- First-party cookies are set by the provider whose online service you are using (e.g. the operator of the website you are visiting)
- Third-party cookies are set by a provider other than the one you are using (e.g. the operator of a website other than the one you are visiting)
b) Similar technologies
Similar technologies enable tracking user behaviour:
- Web Beacons – Small, transparent images embedded in web pages and emails, sometimes called "clear gifs" or "page tags". We use them in marketing emails to track effectiveness.
- JavaScript – Code snippets that facilitate various operations including accelerating refresh speed or monitoring usage.
- Entity Tags – HTTP code mechanisms that allow portions of websites to be stored or "cached" within your browser.
- HTML5 Local Storage – Allows data from websites to be stored or "cached" within your browser to store and retrieve data in HTML5 pages when the website is revisited.
2. Details on the use of cookies and similar technologies
The tables below list the cookies and similar technologies used in relation to our website and/or services and provides further information on the source, the storage duration and the purpose for each cookie.
Necessary
Necessary cookies are required to enable the basic features of this site, such as providing secure log-in or adjusting your consent preferences. These cookies do not store any personally identifiable data.
| Cookie | Duration | Description |
|---|---|---|
| __cf_bm | 1 hour | This cookie, set by Cloudflare, is used to support Cloudflare Bot Management. |
| _cfuvid | session | Calendly sets this cookie to track users across sessions to optimize user experience. |
| __hssrc | session | This cookie is set by Hubspot whenever it changes the session cookie. |
| __hssc | 1 hour | HubSpot sets this cookie to keep track of sessions. |
| cookieyes-consent | 1 year | CookieYes sets this cookie to remember users' consent preferences. |
Functional
Functional cookies help perform certain functionalities like sharing content on social media platforms, collecting feedback, and other third-party features.
| Cookie | Duration | Description |
|---|---|---|
| li_gc | 6 months | LinkedIn set this cookie for storing visitor's consent regarding using cookies for non-essential purposes. |
| lidc | 1 day | LinkedIn sets the lidc cookie to facilitate data center selection. |
Analytics
Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics such as the number of visitors, bounce rate, traffic source, etc.
| Cookie | Duration | Description |
|---|---|---|
| _gcl_au | 3 months | Google Tag Manager sets the cookie to experiment advertisement efficiency. |
| _fbp | 3 months | Facebook sets this cookie to display advertisements. |
| __hstc | 6 months | Hubspot set this main cookie for tracking visitors. |
| hubspotutk | 6 months | HubSpot sets this cookie to keep track of visitors to the website. |
Advertisement
Advertisement cookies are used to provide visitors with customised advertisements based on the pages you visited previously and to analyse the effectiveness of the ad campaigns.
| Cookie | Duration | Description |
|---|---|---|
| muc_ads | 1 year 1 month 4 days | Twitter sets this cookie to collect user behaviour and interaction data. |
| guest_id_marketing | 1 year 1 month 4 days | Twitter sets this cookie to identify and track the website visitor. |
| personalization_id | 1 year 1 month 4 days | Twitter sets this cookie to integrate and share features for social media. |
| bcookie | 1 year | LinkedIn sets this cookie from LinkedIn share buttons and ad tags. |
| IDE | 1 year 24 days | Google DoubleClick IDE cookies store information about how the user uses the website. |
| YSC | session | Youtube sets this cookie to track the views of embedded videos. |
| VISITOR_INFO1_LIVE | 6 months | YouTube sets this cookie to measure bandwidth. |
| VISITOR_PRIVACY_METADATA | 6 months | YouTube sets this cookie to store the user's cookie consent state. |
Contact Us
If you have any questions about this Cookie Notice, please contact us at privacy@ahrefs.com