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SimilarWeb's own privacy policy admits its main terms don't cover the browser extension, the tool most free users actually install. That separate policy says it collects your browsing history and search activity, and can sell that data to other businesses. That's the real price behind SimilarWeb's free tier, and most comparison articles skip it entirely.
This guide checked SimilarWeb's current pricing and privacy pages directly, plus the top-ranking comparison articles for this exact question. Two of those pad their "alternative" lists with tools that don't even estimate site traffic.
We'll start with the options that stay free and the ones that only look that way. The harder part is getting traffic data for someone else's site, so we'll cover where those free options run out too. Let's look at what's available.
Quick answer: the best free SimilarWeb alternative depends on what you're checking
There's no single free tool that replaces SimilarWeb outright. There's a free option for the specific job you need done. Start here:
| What you actually need | Look at this category | Specific pick |
|---|---|---|
| Your own site's traffic and search performance, free forever | Free forever, first-party | Google Search Console + Google Analytics + SEO Heatmap |
| A directional read on how popular any public site or brand is | Free forever, directional | Google Trends |
| A one-off traffic estimate for a site you don't own | Free, single lookups | Ahrefs' free Website Traffic Checker or SimilarWeb's own free web lookup |
| Ongoing competitor traffic tracking on a budget | Free trial or entry paid plan | Semrush or SE Ranking |
| Mobile app traffic and usage specifically | Free tier | Sensor Tower |
This isn't a "best overall" ranking. No free tool gives you unlimited, on-demand access to another site's hard traffic numbers the way SimilarWeb's paid tiers do. The honest answer for most people is a small stack, plus a lower expectation of what "free" can cover for that one specific job.
Why people search for a free SimilarWeb alternative
SimilarWeb doesn't publish self-serve pricing anymore. Its current pricing page splits plans into "Entrepreneurs" and "Businesses & Enterprises" and points everyone toward "contact sales" or "start a free trial" for an actual number. Third-party roundups quote starting points anywhere from $125 to $199 a month, but there's no current official figure to check that against, which is itself part of why this search keeps coming up: it's hard to know what you'd be paying before you talk to someone.
SimilarWeb describes its own free data plainly: "a high-level sample of what we offer" that "shows a limited set of features without deeper drill downs."1 Several review-aggregator sites also catalog user complaints about being billed after trying to cancel a trial, and about traffic estimates that miss badly for smaller sites. Those are user complaints, and we haven't independently verified them. Still, they point to three problems people are trying to solve with this search:
- Wanting a rough traffic number for a competitor without committing to a contract.2 That's what SimilarWeb does, but the free sample gives you little to work with. To go further, you have to talk to sales.
- Hitting the free tier's lookup cap fast. A "high-level sample" runs out quickly once you're checking more than one or two sites.
- Needing your own site's data, not a competitor's. That part is fully solved for free elsewhere, covered below.
The "free" trap: three different things get lumped into one label
The site's free Ahrefs and free Semrush alternative articles already cover this framework in full. The short version:
Free forever has no expiry date, as with Google Search Console. It can mean a permanent free tier or a tool with no paid version at all.
Free trial gives you full access until the window closes. After that, the tool either locks you out or charges the card.
Freemium with a real cap means permanently free but limited, like a fixed number of lookups per day.
The fresh example this round: one major software review directory tags SimilarWeb itself as offering "free trial and free version options" in the same breath, without ever stating what either one actually includes. That's the exact conflation this framework exists to clear up, and it's coming from a source most readers would assume has already done that homework for them.
Watch out for "alternative" lists padded with tools that aren't actually alternatives
Worth naming directly, since two sources reviewed for this piece do this.
One major SEO tool's own "competitors" page lists a scam-checking site as a SimilarWeb competitor, apparently because it gets a similar volume of traffic, not because it does anything remotely similar. A well-known software review directory's "alternatives" list for SimilarWeb includes an email marketing platform, a CRM, and a social media management suite, none of which estimate site traffic at all. It looks as though one list matched traffic brackets and the other matched software categories. Neither appears to have checked the tools' actual jobs.
Does the listed tool estimate web or app traffic, track keywords or help you research competitors? Ask that before treating it as an alternative; being filed in the same software category isn't enough. If you can't answer that from the listing itself, it's not a real alternative. It's a category match.
The real price of SimilarWeb's free tier: your browsing data
This is the part no comparison site covers, and it's worth more attention than a lookup limit.
SimilarWeb's main privacy policy states plainly that it "does not govern the Similarweb mobile app or browser extension."3 That's not a footnote. The browser extension, the product most free users actually install, runs on a separate policy entirely. That extension-specific policy states it collects "browsing history, clickstream data, search history," including the URLs you visit, referrer data, and search engine results page data. The same policy grants the company the right to "sell" or "share" those categories "to business customers so that our business customers may better understand consumer behaviour."
In practice, this means SimilarWeb's free browser extension isn't actually free. It's the mechanism that produces the panel data SimilarWeb's whole free (and much of its paid) product is built on, and the company is contractually free to monetize that feed with other businesses, not just use it to improve your own results. None of the four other comparison sources reviewed for this piece mention this at all; every one of them frames the free tier's cost purely as a feature or lookup limit.
If your SimilarWeb usage stops at the web-based sample lookup and never touches the browser extension, this specific tradeoff doesn't apply to you the same way.4 It's about the extension and its panel membership specifically.
How we picked these alternatives
For every tool, we checked which of the three free-tier types applies and any stated numeric cap, then looked for actual site or app traffic estimates rather than a shared category label. We also checked current pricing and whatever the vendor reveals about handling free users' data.
We worked from the vendors' public pricing and policy pages to make this editorial comparison. We haven't run a hands-on lab test. SEO Heatmap is our own product and is held to the same criteria as everything else below.
Start here: what's actually free forever
For your own site's performance, this is fully solved for free. Google Search Console gives a verified site owner real click, impression, and query data straight from Google, no trial, no cap. Google Analytics adds visitor-level behavior on top of that.5 Neither requires talking to anyone or committing to anything.
For checking any other site's traffic, which is SimilarWeb's actual core job, no tool gives unlimited free access to hard numbers. Two genuinely free options come closest for occasional checks:
- Google Trends shows relative search interest over time for any public brand or domain, for free, with no cap. It's a directional signal (more or less interest, trending up or down), not an absolute visitor count, so don't present it as a traffic estimate.6
- Ahrefs' free Website Traffic Checker gives an actual organic and paid traffic estimate for any single site you enter, plus its top pages and top organic keywords, without a paid plan. Bulk checks of many sites at once are a paid feature; one-off lookups aren't.
Naming this gap honestly, rather than pretending a free tool fully replaces SimilarWeb's core function, is the most accurate claim available in this category.
SEO Heatmap
SEO Heatmap is a free tool that connects to a site's existing Google Search Console data and turns it into a heatmap view, so trends across pages and queries over time are visible at a glance instead of buried in Search Console's line charts.
It solves "my own GSC data is hard to read." It doesn't solve "I need a competitor's traffic number," which is a different job entirely. Pair it with Google Trends above for the closest fully-free combination this category allows.
| Feature | SEO Heatmap | SimilarWeb |
|---|---|---|
| Visualizes your own GSC data | Yes | No |
| Estimates another site's traffic | No | Yes (paid tiers) |
| Setup | Connect via Google sign-in | Account or browser extension |
| Starting price | Free | Custom, contact sales |
Freemium tools with a real (if limited) free tier for competitor traffic
With a free Semrush account, you get 10 searches a day across the tools. You can also audit up to 100 pages and track 10 keywords. It'll cover a competitor you check now and then. Daily monitoring is a different demand. Expect paid plans to start around $140/month, though you should check the current price before signing up.
You won't get the full Ahrefs competitor-research suite on a free plan. For a one-off check of someone else's site, though, there's the standalone Website Traffic Checker above and a free backlink checker showing up to 100 backlinks without an account.
SE Ranking lets you trial competitor data, but it doesn't have a permanent free tier for that work. The paid figures quoted elsewhere vary quite a bit, so get the price from its current plan page rather than a roundup. SE Ranking says access to the platform after its 14-day trial requires a subscription.7
Sensor Tower has a free tier for mobile app traffic and usage estimates. That's a separate job from web traffic, and you might miss it if you only use SimilarWeb to look at websites.
SimilarWeb's own free web lookup still exists alongside the paid product: enter any domain and get a sample-level traffic snapshot, single site at a time, no export. It's the least invasive way to get a quick number from SimilarWeb itself if you'd rather not install the browser extension covered above.
Build a free stack instead of hunting for one tool
No free tool replaces everything SimilarWeb does, and SimilarWeb itself doesn't offer a free tier that tries to. A more realistic setup looks like this:
- Google Search Console, Google Analytics, and SEO Heatmap for your own site's performance, fully free.
- Google Trends for a directional read on any other public brand or domain.
- Ahrefs' free Website Traffic Checker or SimilarWeb's own web lookup for the occasional one-off estimate on a site you don't own.
- Semrush's free account, spent deliberately on the three to five competitors that actually matter, rather than casual browsing.
For a solo marketer or small team, that's enough to do ongoing work without giving any of the tools your card details. You'll be moving between several logins rather than using a single dashboard. And if you need bulk traffic data for other sites with a high degree of confidence, you'll eventually have to pay for it.
When free stops being enough
The stack above holds up for occasional checks and a short list of competitors. It breaks down once accuracy at scale actually matters, like a channel-mix report for a board deck or a real acquisition analysis.
One third-party test compared estimates with Google Analytics on five Shopify stores, spanning 50,000 to 800,000 monthly sessions. SimilarWeb was off by 40 to 70% below 500,000 sessions, while Semrush and Ahrefs were within 15 to 25% above 100,000; keep that in mind before relying on any estimator, free or paid. Third-party traffic estimators model activity rather than measure it directly, and smaller sites are where that modeling gap shows up hardest.
That's not a reason to avoid free, directional tools. It's a reason to treat any single traffic number, free or paid, as an estimate to sanity-check, not a fact to build a decision on alone.8
Before you commit to a free stack: a quick checklist
Copy this before you build a workflow around any "free" tool in this category:
- Confirm the actual numeric free-tier limit (lookups per day, pages audited, results shown) rather than trusting a page that just says "free"
- Check what a free tier or browser extension actually does with your data, not just its lookup cap
- Decide whether you need your own site's data (solved for free) or another site's data (never fully free)
- Watch for "alternative" lists padded with tools that share a category tag but don't do the job
- Re-verify current pricing before any paid upgrade; this category's pricing shifts often and isn't always published
Which free SimilarWeb alternative should you actually use?
| What you actually need | Pick |
|---|---|
| Your own site's data, free forever | Google Search Console + Google Analytics + SEO Heatmap |
| A directional read on any public brand | Google Trends |
| A one-off traffic estimate on a site you don't own | Ahrefs' free Website Traffic Checker or SimilarWeb's own web lookup |
| Ongoing competitor tracking on a budget | Semrush's free account or SE Ranking's entry plan |
| Mobile app traffic specifically | Sensor Tower free tier |
Most readers end up with a small stack rather than one tool, and a lower expectation of what "free" delivers for checking someone else's traffic specifically. That reflects a real gap in this market, not a failure to find the right pick.
If your main reason for reading this is wanting a free, clear view of your own Search Console data without paying anything, that's exactly what SEO Heatmap does. Once you've connected the Search Console property, the heatmap view is free to use.
Frequently asked questions
Does SimilarWeb offer a free trial?
Yes, you can take a trial. That isn't a permanent free plan with a published price. You won't find a numeric price on SimilarWeb's pricing page. To get further, it sends you to a sales conversation or a trial signup. Its truly free option is a limited web lookup that shows a small sample of data, not a full report.
Is SimilarWeb's free browser extension actually free?
Not in the way most people assume. SimilarWeb's own privacy policy states its main terms do not cover the browser extension, which runs on a separate policy. That policy says it collects your browsing history and search activity and can share or sell that data to other businesses, which is how the free product gets funded.
Can Google Search Console replace SimilarWeb?
Only for your own site, not for checking other sites. Search Console gives a verified site owner real click, impression, and query data for free, with no cap. It can't estimate a competitor's traffic, which is SimilarWeb's main job, so pair it with a tool built for that instead.
How accurate are free SimilarWeb alternatives compared to SimilarWeb itself?
It depends on site size, and neither is fully accurate. In one third-party test, SimilarWeb was off by 40 to 70% on sites below 500,000 monthly sessions. On larger sites, Semrush and Ahrefs were within 15 to 25%. A traffic estimate is something to start checking from, even if you paid for it. It isn't the settled answer.
How can I tell if a SimilarWeb alternatives list is useful?
Look for tools that estimate site or app traffic. Being in the same software category, or attracting similar traffic themselves, doesn't mean they do that job. A matching traffic bracket can put a CRM or scam-checking site on those lists. That doesn't make it a tool that does SimilarWeb's work. If the entry never tells you what the tool does, there's no reason to read it as a recommendation. It's just filling a place on the list.
Is there a free way to see a competitor's traffic?
Yes, for a one-off look. Ahrefs' free Website Traffic Checker and SimilarWeb's own web-based lookup both give a single-site traffic estimate at no cost, without bulk checks or ongoing tracking. For a directional read on whether a brand's popularity is rising or falling, Google Trends works too, though it shows relative interest, not a hard visitor count.
Is Google Trends a good SimilarWeb alternative?
For a directional read, yes. There's no charge or limit for seeing how interest in a brand or domain changes over time. You can see if it's rising or falling. Visitor counts, page views and traffic sources aren't in that data. You'll still need a traffic estimator alongside it for those.
When is a paid SimilarWeb alternative worth choosing over free tools?
Pay when the free setup can't handle the scale or accuracy you need. Continuous checks across many competitors, or a report that needs more than rough estimates, are reasons to consider it. A starter Semrush or SE Ranking plan will usually do more for the money at that stage than SimilarWeb's own paid options. Confirm current pricing directly before committing, since none of these tools publish one stable number for long.
If you're stacking free tools to cover your own site's data while skipping SimilarWeb's data-hungry free tier, SEO Heatmap does exactly that. Give it a try. It's free.
Sources (8)
SEO Heatmap Knowledge relies on primary sources: Google's documentation, web standards, peer-reviewed research, and vendors' own pages for their pricing and features. Our editorial standards
- Similarweb. “Web Intelligence Plans and Pricing.”
- Similarweb. “Website traffic checker.”
- Similarweb. “Similarweb Privacy Policy.”
- Similarweb. “Privacy Policy (Similarweb Extension).”
- Google Search Central. “Using Search Console and Google Analytics data for SEO.”
- Google Trends Help. “FAQ about Google Trends data.”
- SE Ranking. “Account and project settings FAQ.”
- Khosravi and Yoganarasimhan, arXiv 2026. “Do Third-Party Web Traffic Estimates Preserve Causal Variation?”
