What is SMTBot?
SMTBot is a web crawler operated by Similarweb that scans websites to detect and catalog the technologies and software tools being used. The collected data powers SimilarTech, helping sales teams identify what web technologies competitors use for competitive analysis and lead generation. Agent Analytics can track when it visits your website.
Overview
| Operated By | Similarweb |
| Source | Official Website |
| Expected To Follow Robots.txt | Yes |
| Insights Last Updated | July 15, 2026 |
Category
Expected Behavior
SMTBot visits with a shopping list. Expect focused, repeated requests to the pages its clients monitor, like pricing, product listings, and announcements, on schedules ranging from hourly to weekly. Sites outside a client's watchlist may never see it at all.
SMTBot's User Agent
| User Agent | Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.81 Safari/537.36 (compatible; SMTBot/1.0; +http://www.similartech.com/smtbot) |
How To Block SMTBot With Robots.txt
Add this rule to your robots.txt file to block SMTBot from accessing your entire website, or use Automatic Robots.txt to block all intelligence gatherers at once. You can customize which pages are blocked by swapping out / for a different path.
User-agent: SMTBot # https://knownagents.com/agents/smtbot
Disallow: /Global Insights for SMTBot
As of July 15, 2026, this data reflects agent visits measured across thousands of websites using Agent Analytics, combined with daily scans of the world's top 1000 websites and their robots.txt files.
Robots.txt Blocked Percentage
Country of Origin
Robots.txt Blocking Trend
0% of top websites block SMTBot in their robots.txt files.
Overall Intelligence Gatherer Traffic
4.4% of all web traffic came from intelligence gatherers.
Top Visited Website Categories
The types of websites most frequently visited by SMTBot.
Frequently Asked Questions
Should I Block SMTBot?
Decide who benefits. SMTBot collects pricing, product, and brand data for its operator's clients, and those clients can include your competitors. Allow it if visibility in market research matters to you. Block it if you would rather not hand competitors structured data about your business. Almost none of the top websites we track have robots.txt rules for SMTBot right now.
Does SMTBot Follow Robots.txt Rules?
Yes. SMTBot is expected to follow robots.txt rules, so a disallow rule is the right first move. Automatic Robots.txt adds and maintains that rule for you, and Agent Analytics confirms SMTBot actually follows it.
Does SMTBot Access Private Content?
Public business information is the target. Pricing pages, product listings, and announcements are what its clients pay for. SMTBot has no special access, but assume everything you publish openly gets collected.
Why Is SMTBot Visiting My Website?
A client of Similarweb is monitoring your market, your brand, or you specifically. Expect SMTBot's visits to concentrate on pages with business value, like pricing and product pages.
How Can I Tell if SMTBot Is Visiting My Website?
Agent Analytics tracks SMTBot visits in real time alongside every other known AI agent, crawler, and scraper. You can also check your server logs for requests whose user agent string contains "SMTBot". Look for repeated visits to pricing, product, and news pages. Keep in mind that SMTBot doesn't publish a verification method, so any client can claim its user agent string and a log match is a hint rather than proof.