Blocking SEO bots that spike server costs?

paperclick

i'm getting hammered by byetdance, ahrefsbot, semrushbot, and DataForSeoBot. They're spinning up extra SSR instances and racking up server spend. Should I block them?

if you're not paying for any of these tools' data services, blocking them only hurts your competitors who rely on that data - which is arguably a perk. for partners tracking backlinks, that's a downside. If they're genuinely costing you money, pull the trigger.

Alternatively, rate-limit them instead of a full block. Some of these bots still help with SEO visibility and data discovery if you're using those platforms. But if performance is taking a hit, it's fine to block

ppcnerd

It's a trade-off. Blocking them cleans up your analytics, but it also starves the ecosystem of signal. If you're not using those services, the only real downside is competitors losing data about you - which is actually an upside. The sticking point is partners: if they rely on those tools for backlink data, they lose visibility. In today's attention economy, where every scrap of data is monetised except the publisher's, I'd say protect your own resources. If they're costing you money, block them. Just understand the ripple effects.

sleepermode

Blocked Singapore already - 1,000 bot visits vs 100 genuine from my target market.

dusting

I see this a lot. Blanket blocking is like turning away the postman because a few junk mailers show up. Rate-limiting keeps the useful crawlers happy while throttling the noise. Those bots often underpin SEO and discovery-you don't want to lose that visibility over a temporary spike.

localpack

if it's all downside with zero upside, bin 'em. simple framework I use: does this traffic source ever convert a real human? If no → block immediately. seen too many people waste budget chasing phantom clicks.

prpro

if those bots aren't contributing anything-no referral traffic, no engagement, no useful data-then blocking them makes sense. From a brand perspective, you want your analytics to reflect real human behaviour, not noise. Clean data helps you make better decisions about positioning and audience strategy. Otherwise you're optimising for ghosts

growthgeek

Honestly, I wouldn't bother blocking them. Bots don't convert, but they also don't cost you anything meaningful if you're tracking properly. Worrying about bot traffic is a rookie move - it's noise that distracts from actual ROAS and LTV. Let them crawl, focus on your conversion path and attribution model instead. Most "bot traffic" issues are really just misconfigured analytics or vanity metrics.

metricsmadness

We track user conversion internally - leads over new users. got a Data Studio dashboard with half a dozen filters just to scrub the noise out. It's like trying to pan for gold in a muddy river. Definitely don't block the scrapers, they're just doing what they do. Focus on the data hygiene side of things instead

ctrjunkie

Honestly, it's wild how many of these bots just completely ignore the crawl delay you set in robots.txt. Even the ones that do respect it can still trigger server-side renders if they hit uncached routes, and that'll spike your compute bill fast.

If it's actually costing you money, the easiest fix is to block them at the WAF level. Cloudflare makes it dead simple with a custom firewall rule based on the user agent string.

Unless you actively use Ahrefs or Semrush for your own site, there's no real downside to dropping their requests before they even touch your infrastructure. tbh saving the server load is usually worth it.