By Kushal Magar · September 27, 2026 · 11 min read
4 Best NerdyData Alternatives for B2B Enrichment in 2026
NerdyData has billed itself as "the original Search Engine for Source Code since 2013" — it indexes raw HTML, JavaScript, HTTP headers, and cookies across the web so you can find every site running a specific script, tracking pixel, or custom-built tool, even ones no predefined technology catalog has cataloged yet. That's a narrow, genuinely useful job, and it's exactly why most generic "alternatives" lists get it wrong by pointing you at contact databases like ZoomInfo or Apollo instead. Here are 4 tools that actually compete on source-code and technographic search, plus one built for what happens after you find the match.
Search "NerdyData alternatives" and most results conflate it with broad B2B contact databases — ZoomInfo, Apollo, Lusha — because "find companies by technology" sounds like a lead-gen category. It isn't quite the same job. NerdyData's own positioning is specific: it makes an entire site's source code searchable, so you can match custom HTML, JavaScript snippets, cookies, or HTTP headers even when they don't exist in anyone's fixed technology list. That's source-code search, not contact discovery — NerdyData doesn't find or verify emails, phone numbers, or firmographic data on its own.
That distinction matters for who this list is actually for. If you picked NerdyData because you needed to find sites running a specific script or niche tool a catalog-based tool would miss, you want a tool that matches that same raw-search approach — not a CRM. We compared PublicWWW, the closest functional match, alongside BuiltWith and Wappalyzer for broader technographic coverage, then added SyncGTM for the step NerdyData was never built to handle: turning a tech-stack match into a verified, enriched contact ready for outreach.
If your interest is really in technographic detection and lead scoring rather than raw code search, our BuiltWith alternatives comparison covers that catalog-based lane in more depth, and W3Techs alternatives is the better read if you're after aggregate market-share stats rather than a per-site search tool.
Quick Summary
The right NerdyData alternative depends on whether you need raw source-code search or a broader technographic dataset. PublicWWW is the closest match to what NerdyData actually does — a search engine over 478M+ indexed pages for exact HTML, JS, and CSS strings, from analytics IDs to custom scripts a fixed catalog would never list, priced from around $29/mo for self-serve access. BuiltWith trades that raw-search depth for a much larger, curated technology catalog and historical adoption data going back years, useful for market research rather than finding one obscure tag, at $295/mo for its Basic tier. Wappalyzer sits between the two: solid technology fingerprinting plus lead lists and CRM integration bolted on, free for light use and $250/mo up for teams that need volume. None of the three, including NerdyData itself, finds or verifies the actual person behind a matched site. SyncGTM is built for that next step — pairing technographic and firmographic signals with a real-time enrichment waterfall across 50+ providers, 76+ data points per lead, and outreach in the same subscription, so a tech-stack match doesn't dead-end at a domain name. If your job stops at "which sites run this code," a dedicated search tool is the right call. If it continues to "who do I contact there," that's where SyncGTM picks up.
TL;DR
- SyncGTM — Best for turning a tech-stack match into a verified, enriched contact and an outreach sequence, not just a list of domains. From $99/mo with a free tier.
- PublicWWW — Best direct match for NerdyData's own model: a raw source-code search engine across 478M+ indexed pages. From ~$29/mo.
- BuiltWith — Best for broad technographic coverage and historical tech-adoption trends across a fixed catalog. From $295/mo.
- Wappalyzer — Best for technology detection bundled with lead lists and CRM-ready exports. Free for 50 lookups/mo, paid from $250/mo.
What We Evaluated
- Search depth — whether the tool matches raw HTML/JS/CSS strings and custom code, or only fingerprints a fixed technology catalog
- Index size and freshness — how many pages are indexed and how often the crawl updates
- Technographic breadth — how many named technologies and categories are tracked for market-research use cases
- Pricing and search limits — cost per plan and whether searches, exports, or API calls are capped
- Lead and contact enrichment — whether the tool stops at the domain/technology match or connects to verified contact data
- Self-serve access — whether pricing and signup are transparent or gated behind a sales call
1. SyncGTM — B2B teams that need a technology or company match connected to verified contacts and outreach, not just a domain list
SyncGTM — B2B teams that need a technology or company match connected to verified contacts and outreach, not just a domain list
SyncGTM is a real-time B2B enrichment platform built for the step NerdyData and other source-code search tools stop short of: turning a company you've identified by technology into a verified, enrichable contact.
Company and technographic signals feed a real-time waterfall across 50+ data providers per lookup, surfacing up to 76+ data points per lead — verified work email, direct phone, firmographics, headcount growth, and job-change signals alongside the tech-stack match itself.
Because discovery, enrichment, and outreach live in the same subscription, a matched company doesn't dead-end at a domain name — it can go straight into a sequence. See the GTM agent library or a ready-made outreach workflow template for how that connects end to end, and check pricing for current plans.
Pros
- +Turns a tech-stack or firmographic match into a verified contact in the same workflow — no separate export/enrich/import loop
- +76+ data points per lead from a 50+ provider waterfall, refreshed at time of lookup
- +Enrichment and outreach in one subscription — no separate sender or contact database required
- +Flat monthly pricing with a free tier to test before committing
Cons
- −Not a raw source-code search engine — can't match arbitrary custom HTML/JS strings the way NerdyData or PublicWWW can
- −$99/mo entry point is aimed at teams that need contact enrichment, not just a technology lookup
Best for: B2B teams that need a technology or company match connected to verified contacts and outreach, not just a domain list
Pricing: Starts at $99/mo. Free tier available.
2. PublicWWW — Teams that need NerdyData's exact raw source-code search model at a lower self-serve price point
PublicWWW — Teams that need NerdyData's exact raw source-code search model at a lower self-serve price point
PublicWWW is the closest functional match to NerdyData's own model: a source-code search engine indexing 478M+ pages for exact HTML, JavaScript, and CSS strings.
It's built for finding who uses a specific analytics ID, AdSense account, ad network snippet, WordPress theme, or JavaScript library — the same custom-code use case NerdyData was originally built around, with downloadable results and API access on paid plans.
Like NerdyData, it's a search tool rather than a contact database, so a matched domain still needs a separate step to find and verify who to actually contact there.
Pros
- +Closest direct match to NerdyData's raw source-code search approach
- +478M+ indexed pages with downloadable results and API access on paid plans
- +Self-serve pricing starting well below the $200+/mo enterprise-style plans common in this category
Cons
- −Search only — no contact discovery, enrichment, or outreach features
- −Steeper learning curve for regex-style search syntax versus a simpler keyword lookup
Best for: Teams that need NerdyData's exact raw source-code search model at a lower self-serve price point
Pricing: From ~$29/mo self-serve, scaling to ~$499/mo for high-volume plans (300 searches/day, up to 1M rows).
3. BuiltWith — Market research and tech-adoption trend analysis across a broad, established technology catalog
BuiltWith — Market research and tech-adoption trend analysis across a broad, established technology catalog
BuiltWith trades NerdyData's raw source-code search for a much larger curated technology catalog — thousands of named technologies tracked with historical adoption data going back years.
That makes it strong for market research and trend analysis (how fast is a technology being adopted, who's switching away from a competitor's stack) rather than finding one obscure, uncatalogued script the way NerdyData or PublicWWW can.
Bulk exports and lead lists are available on paid tiers, but individual site lookups are free — useful for spot-checking a single domain before committing to a plan.
Pros
- +Largest curated technology catalog in this category, with historical trend data
- +Free individual site lookups for quick spot-checks
- +Strong for market research and competitive tech-adoption analysis
Cons
- −Only detects technologies already in its fixed catalog — misses custom or niche code NerdyData/PublicWWW would find
- −No free trial for bulk export or lead-list features; Basic tier caps you at 2 tracked technologies
Best for: Market research and tech-adoption trend analysis across a broad, established technology catalog
Pricing: Basic $295/mo (2 technologies), Pro $495/mo (unlimited), Team $995/mo (unlimited, multi-user).
4. Wappalyzer — Teams that want technology detection bundled with ready-to-use lead lists and CRM export
Wappalyzer — Teams that want technology detection bundled with ready-to-use lead lists and CRM export
Wappalyzer pairs technology fingerprinting with lead lists and CRM-ready exports, positioning itself as a technographic prospecting tool rather than a pure search engine.
A free plan covers up to 50 lookups and email verifications a month, five website alerts, and sample lead lists — enough to test accuracy before committing to a paid plan.
Like BuiltWith, detection relies on a fixed technology catalog, so it won't surface a fully custom or unlisted script the way NerdyData's raw code search would.
Pros
- +Free plan (50 lookups/mo) is usable enough to evaluate before paying
- +Lead lists and CRM integration bundled in, not a separate purchase
- +Website alerts flag when a tracked company's tech stack changes
Cons
- −Catalog-based detection only — can't match arbitrary custom source code the way NerdyData or PublicWWW can
- −Paid plans jump quickly to $250-450/mo for team-level usage and API credits
Best for: Teams that want technology detection bundled with ready-to-use lead lists and CRM export
Pricing: Free (50 lookups/mo). Pro $250/mo, Business $450/mo, Enterprise from $850/mo.
Comparison Table
| Tool | Best For | Free Tier | Starting Price | Standout Feature |
|---|---|---|---|---|
| SyncGTM | B2B teams that need a technology or company match connected to verified contacts and outreach, not just a domain list | Yes | $99/mo | Turns technographic and firmographic signals into verified, enriched contacts through a 50+ provider waterfall — wired directly into outreach |
| PublicWWW | Teams that need NerdyData's exact raw source-code search model at a lower self-serve price point | No free trial, but no-commitment monthly billing | ~$29/mo | The most direct like-for-like replacement for NerdyData's core source-code search engine |
| BuiltWith | Market research and tech-adoption trend analysis across a broad, established technology catalog | Free individual site lookups only | $295/mo | The deepest historical technology-adoption data of any tool on this list |
| Wappalyzer | Teams that want technology detection bundled with ready-to-use lead lists and CRM export | Yes (50 lookups/mo) | $250/mo | Technology fingerprinting bundled directly with lead lists and CRM integration, not sold as a separate step |
How to Choose
- SyncGTM if you need b2b teams that need a technology or company match connected to verified contacts and outreach, not just a domain list
- PublicWWW if you need teams that need nerdydata's exact raw source-code search model at a lower self-serve price point
- BuiltWith if you need market research and tech-adoption trend analysis across a broad, established technology catalog
- Wappalyzer if you need teams that want technology detection bundled with ready-to-use lead lists and crm export
