# Wappalyzer

> Wappalyzer is a technographic intelligence platform that identifies which of more than 8,000 web technologies across 106 categories a website is running by reading public fingerprints in its HTML, scripts, headers, and cookies, then turns those detections into prospect lists filtered by technology stack, alerts when a monitored site adds or removes a tool, contact data with email verification, and CRM enrichment; it runs from a free tier of 50 monthly lookups and 5 website alerts to Pro at $250 a month, Business at $450, and Enterprise from $850.

- Category: Buying Signals & Intent (https://saastracker.org/categories/intent-signals)
- Website: https://www.wappalyzer.com
- Starting price: $0 (Free), then $250 per month (Pro)
- Free plan: Free includes 50 lookups and email verifications per month, 5 website alerts, and free sample lead lists.
- Free trial: No time-limited trial; the free tier serves as the evaluation path
- Founded: 2008, HQ: Not publicly disclosed; the company operates as a small distributed team, Ownership: Privately held with no publicly disclosed venture funding
- Profile last reviewed: 2026-08-22
- Canonical profile: https://saastracker.org/products/wappalyzer

## Overview

Wappalyzer started in 2008 as a browser extension by Elbert Alias that told you what a website was built with, and for years that was the whole product: a small icon that revealed a site's stack. It became the reference implementation for technology detection on the web, installed by developers, marketers, and competitive analysts alike, and the name became shorthand for the question itself. The commercial business grew out of that dataset, and the extension is still free and still the reason most people have heard of it.

The signal it owns is the technology install, and that signal is unusually clean. It is not inferred from research behaviour or purchased from a data broker; it is read directly from public fingerprints in a site's HTML, scripts, headers, and cookies. Either the tag is there or it is not. That makes technographics one of the few signal types with almost no interpretive ambiguity, which is why it survives as a category while fuzzier intent products come and go.

The commercial product has four parts. Technology Lookup turns any domain into account intelligence including its stack, company details, and contacts. Lead Lists build prospect lists filtered by technology, keyword, market, traffic, and geography with exportable contact data. Website Alerts monitor named sites for stack changes, migrations, and new installs, which is where the timing signal lives. Email Verification cleans the addresses before you send. All four are exposed through browser extensions, a Google Workspace add-on, Salesforce, HubSpot, and Pipedrive connectors, Zapier and Pabbly automation, and an API.

Pricing is self-serve and published. Free gives 50 lookups and email verifications a month, 5 website alerts, and sample lead lists. Pro at $250 a month covers one user, two technology targets, and 5,000 lookups and API credits. Business at $450 covers five users, unlimited technology targets, and 20,000 lookups and credits. Enterprise starts at $850 with 25 or more users and 200,000 or more lookups. Every plan can be cancelled at any time. The pinch point for small businesses is the technology target limit rather than the credits, because Pro restricts you to two technologies you can build lists around.

## How it works

1. Detection reads public signals. When a page is fetched, Wappalyzer matches its HTML, scripts, HTTP headers, cookies, and other fingerprints against a rule set covering more than 8,000 technologies in 106 categories, from analytics and payment providers to CRMs, ecommerce platforms, and infrastructure.

2. Those detections become searchable data. Lead Lists let you invert the question and ask which companies run a given technology, filtered by keyword, market, traffic, and geography, and export the resulting companies with contact data attached.

3. For timing rather than targeting, you nominate specific sites to watch. Website Alerts monitor competitor, prospect, and customer domains for stack changes, so a competitor's script disappearing from a customer's site or a prerequisite technology appearing on a prospect's site becomes an event rather than something you would only notice by chance.

4. The output travels to where you work. Browser extensions on Chrome, Firefox, Edge, and Safari show the stack live while you browse, a Gmail add-on surfaces company technology data alongside contacts, Salesforce, HubSpot, and Pipedrive connectors enrich records, and Zapier, Pabbly, and the API carry detections into anything else. Email Verification runs on the addresses before they enter a sequence.

## Best for

Companies whose product displaces or complements a specific, detectable technology, agencies and consultancies prospecting by platform, and competitive analysts who need to know which stacks their market runs on and when those stacks change.

## Not the right fit for

- Businesses whose buying trigger has nothing to do with software installs. If your product is not adjacent to a detectable technology, technographics tells you nothing about who is in market.
- Teams that need person-level signals. Wappalyzer detects what a domain runs, never who is evaluating you, and contact data is supplied from company records rather than from visitor behaviour.
- Anyone expecting cheap breadth on the Pro plan. Two technology targets at $250 a month is a hard limit, and a team that wants to prospect across several stacks needs Business at $450.
- Buyers who want signals routed and scored automatically. Alerts fire and integrations enrich, but there is no scoring model, no signal stacking, and no play that fires an outbound sequence.
- Teams relying on it for first-party intent. Nothing here is about your own website or your own funnel; every detection is about somebody else's site.

## Features

### Technology detection

The dataset the company was built on, and the signal it genuinely owns.

- **More than 8,000 technologies**: Coverage spans 8,122 web technologies across 106 categories at the time of review, from analytics and tag managers to ecommerce platforms, payment providers, and infrastructure.
- **Public fingerprint matching**: Detection reads HTML, scripts, HTTP headers, cookies, and other public fingerprints rather than inferring from behaviour, which is why the signal is close to binary rather than probabilistic.
- **Technology Lookup**: Turn any domain into account intelligence, returning its stack alongside company details and contact information, which is the single-account version of the product.
- **Browser extensions**: Chrome, Firefox, Edge, and Safari extensions show the stack of any site while you browse, which is how most people first encounter the product and still a genuinely useful research tool.

### Lead Lists

Inverting detection into a target list.

- **Filter companies by technology**: Build lists of companies running a given technology, which is the core prospecting motion for anyone selling a replacement for or complement to a detectable tool.
- **Keyword, market, traffic, and geography filters**: Additional filters narrow a technology cohort down to companies of the right size, sector, and region rather than every site on the internet running a tag.
- **Contact data included**: Company and contact information is attached to list output, so the list is usable without a second enrichment vendor.
- **Technology targets as the plan limit**: Pro allows two technology targets and Business allows unlimited, which is the most consequential difference between the two tiers and the reason many buyers skip Pro.
- **Export**: Lists export for use in a CRM or sequencer, with free sample lists available on the no-cost tier so you can judge quality before paying.

### Website Alerts

The timing signal, and the part most relevant to this category.

- **Stack change monitoring**: Nominate competitor, prospect, and customer domains and get told when their technology stack changes, which converts a static dataset into an event feed.
- **Migration detection**: A tool disappearing is often a stronger buying signal than one appearing, because a company mid-migration is actively choosing a replacement.
- **New install detection**: A prerequisite or complementary technology appearing on a prospect's site indicates the account has just become addressable for your product.
- **Five alerts on the free tier**: Enough to monitor your most important accounts or your closest competitors at no cost, which is a rare thing to get for nothing in this category.

### Data hygiene and enrichment

The supporting layer that makes the lists usable.

- **Email verification**: Addresses are validated to reduce bounces and protect sender reputation, metered from the same allowance as lookups.
- **CRM enrichment**: Salesforce, HubSpot, and Pipedrive connectors append technographic data to existing leads, accounts, and deals so the stack context sits with the record.
- **Gmail add-on**: A Google Workspace add-on shows company technology data alongside contacts in the inbox, which puts the signal where a rep is already working.
- **Bulk data products**: Beyond per-lookup access, the dataset is available in bulk for teams doing market analysis rather than account-by-account research.

### Access and automation

Four ways in, none of which requires living in the app.

- **API with credit metering**: API credits are allocated per plan, 5,000 on Pro and 20,000 on Business, so programmatic access is included rather than sold separately.
- **Zapier and Pabbly**: No-code automation routes detections into thousands of other applications without an engineer.
- **Seat allocations**: One user on Pro, five on Business, and 25 or more on Enterprise, which unusually makes seats a real constraint at the entry tier.
- **Cancel at any time**: All paid plans are cancellable, with no annual commitment required to access the published pricing.

## Use cases

- **Founder selling a replacement for a specific SaaS tool**: The ideal customer is any company currently running a named competitor, and there is no way to find them at scale without guessing from case studies. Outcome: A Lead List filtered on that competitor's tag, narrowed by market and traffic, produces a target list of companies verifiably running it, with contacts attached and emails verified before the first send.
- **Agency prospecting by platform**: The agency only works with sites on one ecommerce platform, and lists bought from a data vendor are full of companies that migrated away two years ago. Outcome: Detection reads the live site rather than a stale database, so the list reflects what those companies are running now, and Website Alerts flag when an existing client's stack changes.
- **Competitive analyst tracking displacement**: Leadership wants to know whether customers are quietly migrating away from a competitor and there is no data behind the anecdotes. Outcome: Monitored domains report stack changes as they happen, so migrations become a countable event, and the free tier's five alerts cover the most important accounts before any budget is committed.
- **Sales rep researching an account before a call**: Ten minutes before a discovery call and no idea what the prospect already runs, which makes half the qualification questions redundant. Outcome: The browser extension or the Gmail add-on shows the stack instantly, so the call starts from what the company actually uses rather than from a question they have answered five times this month.

## Pricing

Self-serve tiered subscription metered by lookups, email verifications, and API credits, with seat counts and technology targets as additional per-tier limits.

- **Free**: $0 per month. 50 lookups and email verifications per month; 5 website alerts; Free sample lead lists; Browser extensions. Five monitored domains for nothing is the most useful part of this tier, and enough to watch your top accounts.
- **Pro**: $250 per month. 1 user; 2 technology targets; 5,000 lookups and verifications; 5,000 API credits; Cancel at any time. The two technology targets and single seat are the real constraints, not the credits.
- **Business**: $450 per month. 5 users; Unlimited technology targets; 20,000 lookups and verifications; 20,000 API credits. Unlimited technology targets for $200 more than Pro is the step most teams should take directly.
- **Enterprise**: $850 or more per month. 25 or more users; Unlimited technology targets; 200,000 or more lookups and verifications; 200,000 or more API credits.

Billing notes:

- Technology targets, not credits, are the binding limit on Pro: two targets means two technologies you can build lists around, which is restrictive for anyone selling into several stacks.
- Seats are genuinely metered here, with one user on Pro and five on Business, which contrasts with the unlimited-seat model several competitors use.
- Lookups and email verifications draw from the same allowance, so a heavy verification run reduces the research capacity available that month.
- All paid plans can be cancelled at any time, with no annual contract needed to access published pricing.
- The free tier is permanent rather than a trial, which makes it a reasonable long-term home for a team that only needs five monitored domains.

Value assessment: Wappalyzer is priced as a data product rather than a cheap tool, and whether that is good value depends almost entirely on whether technology installs are your buying trigger. If they are, the signal is close to unambiguous and worth paying for, and Business at $450 with unlimited technology targets and five seats is the tier that actually fits a small sales team. If technographics are merely interesting to you, $250 a month for one seat and two technology targets is poor value next to broader signal tools at half the price. The free tier is the honest test: five website alerts and fifty lookups a month cost nothing, and a fortnight of using them will tell you whether stack changes correlate with your deals.

## Strengths

- The cleanest signal type in this category, read directly from public fingerprints rather than inferred, so a detection is close to a fact rather than a probability.
- Coverage of more than 8,000 technologies across 106 categories, which is the reference dataset for this question and has been for well over a decade.
- A permanently free tier with five website alerts and fifty lookups a month, enough to monitor key accounts and validate the thesis at no cost.
- Website Alerts turn a static dataset into a timing signal, and migrations detected early are among the strongest buying triggers that exist.
- Integrations that meet people where they work: browser extensions, a Gmail add-on, Salesforce, HubSpot, and Pipedrive connectors, plus Zapier, Pabbly, and an API.
- Contact data and email verification included, so the list you build is usable without buying a second enrichment product.
- A long-lived, independent company operating since 2008 with no venture funding pressure, in a category where younger competitors keep being acquired and shut down.

## Limitations

- One signal type only. If your buyer's readiness is not expressed through a technology install, Wappalyzer has nothing to say about them.
- Pro's limit of two technology targets and one seat makes the entry tier awkward, pushing most real teams to $450 whether they need the volume or not.
- Detection sees what is publicly loadable, so server-side implementations, tag manager indirection, and privately hosted tools can be missed entirely.
- A technology being present says nothing about satisfaction, contract timing, or budget, so the false positive here is subtler than a wrong detection: it is a correct detection with no buying intent behind it.
- No scoring, no signal stacking, and no automated play; alerts and enrichment are the extent of the activation layer.
- Company details such as headquarters, team size, and refresh cadence for the dataset are not publicly disclosed, which is thin transparency for a data vendor.

## Comparisons

- **Wappalyzer vs PredictLeads**: PredictLeads also tracks technology detections, across more than 54,000 technologies, and bundles them with job openings, news, funding, and firmographics through a pay as you go API from $40 a month. Wappalyzer goes narrower and deeper on the technology question, with a browser extension, lead lists, alerts, and CRM connectors that a non-engineer can actually use. Take PredictLeads if you are building your own engine and want several datasets from one API; take Wappalyzer if technographics are the whole motion and you want a product rather than an endpoint.
- **Wappalyzer vs WhiteWhale**: WhiteWhale answers plain-English questions daily against news, filings, earnings calls, and job postings for $200 a month, which covers a much wider range of triggers but reads published words rather than site code. Wappalyzer detects the install itself, which is the only reliable way to know a tool is genuinely running. If your trigger is a technology appearing or disappearing, Wappalyzer sees it and WhiteWhale will not; for every other kind of trigger, the reverse is true.
- **Wappalyzer vs Clay**: Clay can call technographic providers as one enrichment among many and combine them with everything else in a table, which is the better architecture if technology is one input among several. Wappalyzer is the better choice when technology is the input, because the lead list builder, alerts, and browser extension are purpose-built for that question rather than assembled from generic parts. Many teams end up using Wappalyzer for research and alerts while running bulk enrichment through Clay.
- **Wappalyzer vs LeadMagic**: LeadMagic includes technographics inside its company enrichment endpoint, but its real strengths are verified work emails, direct mobiles, and a job change detector, from $49.99 a month with credits charged only on successful results. Wappalyzer goes far deeper on the technology question and does nothing comparable on contact data quality. Use Wappalyzer to decide which accounts to target by stack, and LeadMagic to find and verify the people at them.

## Implementation

- Setup time: Minutes. Install the browser extension, sign up for the free tier, and set five website alerts on the accounts you care about. Building a filtered lead list and connecting a CRM takes an afternoon.
- Learning curve: Very low. The core question, what is this site running, is self-explanatory, and the lead list filters behave like any list builder. The judgement work is deciding which technology signals genuinely correlate with your deals rather than which ones are interesting.
- Onboarding: Entirely self-serve at every published tier including Enterprise pricing, with a permanent free tier instead of a countdown trial and cancellation available at any time.
- Migration: There is nothing to migrate in, since detections are generated on demand against live sites rather than accumulated in your account over time. That also means no historical archive is lost on exit: exported lists and CRM enrichment already live in your systems. Website alert configurations do not transfer to another vendor, but rebuilding a handful of monitored domains is a ten-minute job.

## Platform, API & security

- Platforms: Web application, Chrome, Firefox, Edge, and Safari extensions, Google Workspace add-on for Gmail, API, Bulk data delivery
- API: A credit-metered API included on paid plans, with 5,000 credits on Pro and 20,000 on Business, plus Zapier and Pabbly for no-code automation and bulk data products for large-scale analysis.
- Compliance: Detection reads publicly available website fingerprints rather than personal data, Contact data handling is subject to standard GDPR obligations
- Data residency: Not publicly disclosed.
- SSO: Not advertised on the published tiers.
- Security notes: Technology detection itself carries a low privacy profile, since it reads public page fingerprints rather than tracking individuals. The regulated surface is the contact data attached to lead lists, which is personal data and places the usual outbound obligations on you rather than the vendor.

## Support

- Channels: Email support, Support scaling with plan tier
- Documentation: Documentation covering the API, integrations, technology categories, and lead list building, alongside a public directory of the technologies and categories tracked.
- Community: The open-source browser extension heritage means a large informal user base among developers and analysts, though there is no large official forum.

## Company

- Founded: 2008
- Founders: Elbert Alias
- Headquarters: Not publicly disclosed; the company operates as a small distributed team
- Ownership: Privately held with no publicly disclosed venture funding
- Employees: Not disclosed
- Funding: No publicly disclosed venture rounds. The business grew out of the free browser extension and is funded by its own revenue.

Timeline:

- 2008: Founded by Elbert Alias, initially as a browser extension that revealed which technologies a website was built with.
- 2015: The extension becomes the default reference tool for technology detection among developers, marketers, and competitive analysts.
- 2020: Commercialises the dataset with lead lists, bulk data, and an API, turning a research utility into a technographic data business.
- 2024: Adds website alerts for stack changes plus email verification and CRM connectors, moving the product from static targeting toward timing signals.
- 2026: Tracks 8,122 technologies across 106 categories with published self-serve pricing from a free tier through Pro at $250, Business at $450, and Enterprise from $850 a month.

## Integrations

Chrome, Firefox, Edge, and Safari extensions, Salesforce, HubSpot, Pipedrive, Gmail via Google Workspace add-on, Zapier, Pabbly, API, Bulk data export

## FAQ

### What is Wappalyzer?

Wappalyzer is a technographic intelligence platform that identifies which of more than 8,000 web technologies a website is running by reading public fingerprints in its HTML, scripts, headers, and cookies. It turns those detections into prospect lists filtered by technology, alerts when a monitored site changes its stack, contact data with email verification, and CRM enrichment. It began in 2008 as a free browser extension that still exists.

### How much does Wappalyzer cost?

Free gives 50 lookups and email verifications a month, 5 website alerts, and sample lead lists. Pro is $250 a month with 1 user, 2 technology targets, and 5,000 lookups and API credits. Business is $450 a month with 5 users, unlimited technology targets, and 20,000 lookups and credits. Enterprise starts at $850 with 25 or more users and 200,000 or more lookups. All paid plans can be cancelled at any time.

### What is a technology target and why does it matter?

It is a technology you are allowed to build lead lists around, and on the Pro plan you get only two. That is the single most important limit in the pricing, because a team selling against three competitors, or into several complementary stacks, cannot do it on Pro at any credit volume. Unlimited technology targets begin on Business at $450, which is why many buyers skip the middle tier entirely.

### Where does the signal come from and how fresh is it?

Detection reads public fingerprints on the site itself: HTML markup, script tags, HTTP headers, cookies, and similar artefacts, matched against a rule set covering 8,122 technologies in 106 categories. Because it reads the live site rather than a purchased database, a lookup reflects what the site is running now. The company does not publish a refresh cadence for its stored dataset, so for time-critical questions the Website Alerts product is the mechanism to rely on rather than list data.

### How reliable is technology detection?

More reliable than most signal types, and not perfect. A detection is a fact about what the page loaded, not an inference, so false positives in the strict sense are rare. The real failure mode is invisibility: server-side implementations, tools loaded through a tag manager in ways that do not fingerprint cleanly, and privately hosted software may not appear at all. Absence of a detection is therefore weak evidence, while presence is strong evidence.

### What is the false-positive problem with technographic prospecting?

It is subtler than bad data. The detection can be entirely correct and the account still be a terrible prospect, because running a technology says nothing about whether they are happy with it, when their contract renews, or whether anyone is looking to change. That is why Website Alerts matter more than static lists: a tool being removed or a new one appearing is a change in state, and change is what indicates a decision is being made.

### Does Wappalyzer route or score signals?

Not really. Website Alerts fire when a monitored site changes, and Salesforce, HubSpot, Pipedrive, Gmail, Zapier, Pabbly, and the API carry data into your workflow. There is no scoring model, no signal stacking, and nothing that enrols an account into a sequence. Wappalyzer supplies the detection and the alert; deciding what it means and acting on it is entirely your process.

### What does it cost to act on a signal?

Lookups and email verifications draw from a shared monthly allowance, 5,000 on Pro and 20,000 on Business, so researching an account and verifying its contacts both consume the same budget. Seats are also metered, with one user on Pro and five on Business, which is unusual in this category and means giving the whole team access is a real cost rather than a free upgrade.

### Is the free tier actually useful?

Yes, more than most. Fifty lookups a month covers ad hoc account research, and the five website alerts let you monitor your five most important accounts or competitors indefinitely at no cost. It is a permanent tier rather than a trial, so a very small team with a narrow watchlist can sit on it for a long time and still get the timing signal that matters most.

### Who is behind Wappalyzer?

It was founded in 2008 by Elbert Alias and grew out of the free browser extension that made technology detection a mainstream question. The company is privately held with no publicly disclosed venture funding and operates as a small distributed team, which means no investor-driven push upmarket but also limited public disclosure about headquarters, headcount, and dataset refresh practices.

## Editorial verdict

Wappalyzer owns the cleanest signal in this category. A technology detection is read from the site itself rather than inferred from behaviour, so it is close to a fact, and after eighteen years the dataset covering 8,122 technologies is the reference for that question. Whether you should pay for it comes down to one thing: does a technology appearing or disappearing on a prospect's site actually predict a deal for you. Start with the free tier, put website alerts on your five most important accounts, and find out at no cost. If the answer is yes, go straight to Business at $450, because Pro's two technology targets and single seat will frustrate any real team. If the answer is no, buy a broader signal tool instead, because Wappalyzer will not tell you anything about accounts whose readiness is expressed in any other way, and it will not score, route, or act on the signal once it has found it.

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Source: SaaSTracker (https://saastracker.org), an independent editorial project. This profile is compiled from public information, carries no peer reviews or paid placement, and was last reviewed 2026-08-22. Awards are judged on published criteria: https://saastracker.org/methodology