Offline backlink analysis powered by Common Crawl's web graph. No subscriptions, no credits, no tracking.
Licence keys are issued by hand, usually within a few hours and always within 24. You will get an email with your key and expiry date.
The app is a free download with a 30-day trial of everything, including Backlinks and Link Gap. Download the app, download the database, and run real analyses on your own sites before deciding whether it is worth $30.
After 30 days, Lookup, Compare and Batch keep working forever. Only Backlinks and Link Gap lock, and a licence unlocks them again.
No. There is no automatic billing and nothing stored to charge again. You pay once for 12 months. When it runs out, Backlinks and Link Gap lock and you decide whether to renew. The app and the database stay on your disk either way.
Because the data comes from Common Crawl, which is public and free to anyone. What you are paying for is the processing — turning billions of raw web-graph edges into something a desktop app can query instantly, and the app that does the querying. Gating the download would add friction without protecting anything.
About 21.6 GB to download and about 90.3 GB once unpacked, so you will want about 112 GB of free disk space while it installs. The app downloads and unpacks it for you, and the download resumes where it left off if it is interrupted, even after a restart. An external SSD works fine: you can set a custom data folder in Settings.
Yes. Every release published during your 12 months is included. A new release comes out about every three months, built from Common Crawl's latest web graph, and the app offers it to you as a fresh download.
Open Settings (gear icon), click License..., paste your key and click Activate. The app checks it online once, binds it to that machine, and stores the activation locally. After that it works offline — it only contacts the server again when you open the License window (to look for a renewal) or when your expiry date passes.
Each key activates on one machine. If you move to a different computer, or reinstall Windows and the machine fingerprint changes, reply to your order email and I will reset the key so it can be activated again.
Backlinks and Link Gap lock. Everything else — Lookup, Compare, Batch, your saved settings, the database you downloaded — carries on working. Renew and the same key unlocks them again; there is no new key to enter.
In the app, open Settings → License... and click Buy a licence — with a key already entered it brings you to the renewal page. Or use this page's renewal option. Your existing key is extended rather than replaced, so nothing needs re-entering.
Tom's Link Authority is a free Windows desktop app. Download it from the Link Authority product page.