Best BuiltWith Alternatives in 2026

Short answer: the best free BuiltWith alternative for Shopify research is Koala Inspector, a Chrome extension that reads any store's apps, theme, top products, and estimated sales the moment you open it. BuiltWith's paid plans start at $295 per month and return a generic technology list; Koala Inspector starts free and goes straight to the store data Shopify sellers actually want. For general (non-Shopify) tech-stack lookups, WhatRuns and Wappalyzer are the free picks below.

BuiltWith does a lot of things well. You can look up any domain and see the CMS, hosting provider, analytics suite, ad pixels, payment processors, and dozens of other technologies in one place. For sales teams building prospect lists by tech stack, or agencies scoping competitive landscapes, it's a useful tool.

The friction is cost. BuiltWith's lowest paid plan starts at $295 per month, which rules it out for most small businesses and solo operators. The free tier exists but caps you at a basic tech-stack snapshot with no historical data, no export, and no bulk lookups. Add a dense interface that takes time to learn, and you can see why people go looking for alternatives.

This guide covers five tools that fill the gap. If you run or research Shopify stores, start with Koala Inspector; the rest are honest context for everything else.

Why People Leave BuiltWith

Cost. At $295 to $495 per month for the standard plans, BuiltWith is priced for enterprise sales teams with dedicated budgets. A freelance developer or a Shopify store owner checking out a competitor's setup will pay that same price whether they do 10 lookups a week or 10,000.

The free tier is thin. The free plan shows a snapshot of a site's current tech stack, but strips out historical data, trend views, and any bulk features. For most competitive research tasks, you hit the paywall almost immediately.

Interface complexity. BuiltWith's reporting interface is dense. The data is there, but pulling a clean comparison between two competitors requires navigating multiple report sections. Tools built later have cleaner UX by default.

Coverage gaps. BuiltWith tracks a wide range of technologies, but newer or more niche tools sometimes show up with a generic category label rather than a specific name. If you're researching a fast-moving niche, that kind of lag matters.

How to Pick the Right Alternative

Before picking a replacement, decide what you actually need:

Shopify competitor research specifically. If you're researching other Shopify stores - what apps they run, which products are selling, what themes they use - a general tech-stack tool like BuiltWith will give you a list of installed apps but nothing more. A Shopify-specific tool goes deeper: sales estimates, trending products, ad spend signals, store age.

Free vs. paid. WhatRuns is free with no paid tier. Wappalyzer's free extension is solid for one-off lookups but the paid API is expensive. Koala Inspector has a workable free plan. If budget is the main constraint, start there.

API access for automation. If you want to query tech stacks programmatically as part of a sales workflow or enrichment pipeline, you need a tool with an API. WhatRuns and Netcraft are browser-extension-only. Wappalyzer and BuiltWith both have APIs.

Security focus. None of the marketing-oriented tools will tell you much about a site's vulnerability profile. Netcraft is the one tool in this list that does security detection well.

Top 5 BuiltWith Alternatives

Tool	Pricing	Free Plan
Koala Inspector	$0 - $22/mo (plus token packs)	Yes
WhatRuns	Free	Yes
Netcraft	On request	Yes
Wappalyzer	$250 - $850/mo	Yes
SimilarTech	$200 - $490/mo	Limited

Prices are each vendor's published rates as of 2026 and move over time, so check the tool's own pricing page for the current figure before you commit.

1. Koala Inspector - Best for Shopify Competitor Research

Koala Inspector is a Chrome extension built specifically for Shopify, and for store owners it beats BuiltWith on the three things that matter most: it is free to start, it runs in your browser with no account setup or dashboard to learn, and it gives an instant per-store read instead of a generic technology list. Open a competitor's store, click the icon, and the data is there.

Where BuiltWith returns "this domain runs Shopify plus a handful of apps", Koala Inspector shows the apps the store has installed, the exact theme they're using, estimated monthly sales, top-selling products, recent price changes, and their social channels. It tracks Shopify competitors at the product and revenue level, so you see which products are moving and what that store's rough revenue looks like - the difference between a tech list and a research tool. For a wider look at this category, see our roundup of Shopify spy tools.

That difference is the whole point of competitor research for a Shopify business. Knowing a competitor uses Klaviyo is context. Knowing which products they're pushing hardest and how their sales are trending is something you can act on this week.

The free plan gives you 15 tokens per month, which covers a handful of detailed store lookups. The premium plan at $22 per month bumps that to 220 tokens with tracking for up to 50 shops. One-time token packs are also available (100 tokens for $11.99) if you need a bigger burst without a monthly commitment.

The obvious limitation: it only works on Shopify. If you're researching non-Shopify sites, you need something else.

Pricing:

• Free plan: $0/month, 15 tokens
• Premium: $22/month (220 tokens, track up to 50 shops, VIP support)
• Token packs (one-time, no expiry): 10 for $3.99, 25 for $6.99, 100 for $11.99

Good fit for: Shopify store owners, dropshippers, and eCommerce brands doing competitive research.

Not a fit for: Non-Shopify sites, general web technology detection, or lead generation by tech stack.

2. WhatRuns - Best Free Option for Quick Tech Stack Lookups

WhatRuns is a browser extension that identifies technologies on any site you're visiting. Install it in Chrome or Firefox, click the icon on any page, and you get a list of detected frameworks, CMS, analytics tools, CDN, ad networks, and plugins.

There's no dashboard, no reporting, no export, and no API. It's a single-site lookup tool for people who want to know what a website is built on without paying anything or signing up for an account.

Detection accuracy is generally good for mainstream technologies. For less common tools, coverage can be spotty. The extension uses crowdsourced fingerprinting data, which means detection quality is proportional to how popular a given technology is.

The big trade-off versus BuiltWith is scope. WhatRuns has no trend data, no historical tracking, no filtering by technology to find all sites using a particular tool, and no lead generation features. You check one site at a time, you get a snapshot.

For a developer who occasionally wants to see how a competitor's site is built, or a marketer doing one-off research, it's a solid free tool. For anything involving volume or analysis, you'll outgrow it quickly.

Pricing: Free, no paid tier.

Good fit for: One-off technology lookups, casual competitive research, developers checking out a site's stack.

Not a fit for: Bulk research, historical tracking, or lead generation.

3. Netcraft - Best for Security-Focused Analysis

Netcraft has been tracking internet infrastructure since 1995, making it one of the longest-standing sources of web technology data. Today it operates primarily as a cybersecurity company, but its site report tool still provides a useful technology profile of any domain.

A Netcraft lookup shows hosting history, DNS information, SSL certificate details, technology stack, and a site risk rating based on Netcraft's phishing and malware detection databases. That security layer is what separates it from every other tool in this list.

If you need to know whether a site you're about to do business with has a clean security history, has switched hosting providers suspiciously often, or is flagged in fraud databases, Netcraft covers that. Marketing-oriented tools don't.

The free lookup on the Netcraft website is solid for individual site checks. Paid plans are geared toward enterprise security teams and are quoted on request.

Pricing: Free for basic site reports; enterprise plans on request.

Good fit for: Security teams, fraud detection, due diligence on business partners, anyone who needs more than just a tech list.

Not a fit for: Bulk tech-stack research, lead generation, or eCommerce competitor analysis.

4. Wappalyzer - Closest Direct BuiltWith Alternative

Wappalyzer is the tool most people mean when they say they want a free BuiltWith alternative. The Chrome and Firefox extensions are free and provide solid technology detection across a wide range of sites. For one-off lookups, it handles most of what BuiltWith's free tier does.

The difference shows when you need bulk data. Wappalyzer's API and dataset products are priced at $250 per month (Pro), $450 per month (Business), and $850 per month (Enterprise). That's cheaper than BuiltWith but still substantial.

Detection is generally accurate for common technologies. The technology fingerprinting database is community-maintained and updated regularly, so coverage of newer tools is often faster than BuiltWith. On the other hand, some users find occasional false positives, particularly for JavaScript frameworks where fingerprinting relies on file patterns rather than direct detection.

The Wappalyzer API integrates with CRMs and sales tools, making it the most BuiltWith-like option for teams that need to enrich prospect lists with technology data.

Pricing:

• Browser extension: free
• Pro API: $250/month
• Business API: $450/month
• Enterprise API: $850/month

Good fit for: Sales and marketing teams doing tech-stack enrichment, developers who want API access to technology data, anyone replacing BuiltWith at a lower price point.

Not a fit for: Budget-constrained users who need bulk data (the paid plans are still expensive), or Shopify-specific research.

5. SimilarTech - Best for Lead Generation by Tech Stack

SimilarTech is purpose-built for one specific workflow: identifying companies that use a particular technology and building prospecting lists from that. It covers over 600 million websites and tracks technology trends over time, making it comparable to BuiltWith's lead generation features.

The practical use case is straightforward. If you sell a Shopify app, you can export a list of every Shopify store in a given country, filtered by revenue range or traffic estimates, and push that list to your CRM. If you sell a competing product to Magento stores, you can filter by Magento users in a particular industry.

The free plan allows limited searches. Paid plans start at $200 per month for the Basic tier and go up to $490 per month for the Ultimate plan, which includes API access and higher export volumes.

The focus is firmly on enterprise use cases and B2B sales teams. Individual users or small teams looking for occasional lookups will find the free plan too restricted and the paid plans expensive for casual use.

Pricing:

• Free: limited searches
• Basic: $200/month
• Ultimate: $490/month (includes API access)

Good fit for: B2B sales teams doing outbound prospecting, companies that sell to businesses based on the tools they use.

Not a fit for: Individual researchers, small budgets, or Shopify-specific eCommerce research.

Which Tool Should You Use?

The answer depends almost entirely on what you're trying to accomplish.

Shopify competitor research: Use Koala Inspector. General tech-stack tools tell you which apps a store runs. Koala Inspector tells you which products are actually selling.

Free one-off lookups: WhatRuns is the simplest option. Install the extension, look up a site, move on.

BuiltWith replacement for lead generation or API access: Wappalyzer is the most direct substitute. Coverage and API structure are similar; pricing is lower.

Security or due diligence: Netcraft is the only tool in this category that gives you a meaningful risk profile.

B2B prospecting by tech stack at scale: SimilarTech and Wappalyzer are both worth evaluating; SimilarTech is more focused on the lead-gen workflow specifically.

For Shopify stores, start with Koala Inspector's free plan before spending on any of the paid options. You get 15 tokens per month to test it against real competitors, with no credit card required. The data you get on a Shopify competitor in one Koala Inspector lookup takes several separate BuiltWith reports to approximate. Try Koala Inspector free and run it on a competitor store to see what it surfaces.

FAQ

Is there a free BuiltWith alternative?

Yes. For Shopify research, Koala Inspector has a free plan that reads any store's apps, theme, and products from your browser. WhatRuns is fully free for one-off tech-stack lookups on any site, and Wappalyzer's browser extension is free for single-site checks. BuiltWith's own free tier exists but strips out history, export, and bulk lookups.

What is the cheapest BuiltWith alternative?

WhatRuns is free with no paid tier, so it is the cheapest for plain tech detection. For deeper Shopify data, Koala Inspector starts free and its Premium plan is $22 per month, well below BuiltWith's $295 per month entry plan. Wappalyzer and SimilarTech undercut BuiltWith on API pricing but still start at $200 to $250 per month.

What is the best BuiltWith alternative for Shopify stores?

Koala Inspector. It is a Chrome extension built for Shopify, so it reads a store's installed apps, theme, top products, and estimated sales the moment you open the store, rather than returning a generic tech list. For the broader category, compare the options in our Shopify competitor analysis guide.

Does Koala Inspector work on non-Shopify sites?

No. Koala Inspector only works on Shopify stores. For non-Shopify sites, use Wappalyzer or WhatRuns for the tech stack, or Netcraft when you need security and hosting history.