The search engine optimisation Bots That ~140 Million Web sites Block the Most

We regarded on the complete variety of web sites blocking the bots. There are a lot of methods to dam bots with robots.txt, and this accounts for all of them together with:

• Specific blocks, the place the bot is talked about and disallowed
• Normal blocks, the place all bots could also be blocked
• Any situations the place a directive allowed the bot, after blocking all bots

Caveats: this doesn’t embrace another block varieties equivalent to firewalls or IP blocks.

As I discussed earlier, essentially the most blocked bot is MJ12bot from Majestic. I think there are a pair causes for this.

1. They’re a distributed crawler, that means you possibly can’t lookup or block them by IPs, which makes them much less trusted.
2. They’ve been crawling the net for longer.
3. They’ve a smaller consumer base than extra well-liked search engine optimisation instruments and due to this fact much less leverage to take away any blocks.

Listed here are essentially the most blocked search engine optimisation bots:

And the entire web sites blocking search engine optimisation bots:

Right here’s the information:

It will get a bit of extra difficult to research. For the above, we regarded on the major robots.txt file for an internet site, however each subdomain can have their very own set of directions. If we take a look at the ~461M robots.txt in complete, then essentially the most blocked search engine optimisation bot is SemrushBot at 5.76%. Listed here are the highest 5:

1. SemrushBot: 5.76%
2. Dotbot (Moz): 5.34%
3. MJ12bot (Majestic): 4.96%
4. BLEXBot: 4.88%
5. Ahrefsbot: 4.67%

For this measure, we’re trying solely at circumstances the place a specific bot is disallowed. It doesn’t embrace any total disallow statements or circumstances the place solely sure bots could also be allowed. In these circumstances, web site homeowners went out of their strategy to particularly block sure bots.

Majestic’s bot is essentially the most focused, adopted by Moz’s bot.

Listed here are essentially the most blocked search engine optimisation bots by express mentions:

Listed here are the variety of web sites explicitly blocking search engine optimisation bots:

Right here’s the information:

We regarded on the high 1M websites by DR, which aligns to websites with a DR >45. Semrush is essentially the most blocked adopted by Majestic and Moz.

Right here’s the way it breaks down for every particular person bot in several classes of internet sites. The highest 3 are:

1. Autos_and_Vehicles: 39%
2. Books_and_Literature: 27%
3. Real_Estate: 17%