Builtwith
See what any website is built on
What is Builtwith
BuiltWith scans millions of websites and surfaces the technology stack behind each one — covering analytics tools, ad platforms, CMS, hosting, eCommerce software, and more across 113,000+ tracked technologies. It's built for SDRs, BDRs, RevOps teams, and GTM leads at mid-market and enterprise companies who need to filter prospects by the tools they actually use. The standout capability is real-time technology change notifications — you can get alerted when a target account adds or drops a specific technology, which creates a precise trigger for outreach. BuiltWith connects natively to Salesforce, HubSpot, and Pardot, and exposes its data via API for teams that want to pipe signals into their own workflows. That said, it is primarily a data and signals layer — it does not handle sequencing, outreach, or contact-level enrichment, so you'll need separate tooling to act on what it surfaces.
Key features
detects which tools a target company uses
first-party connectors, no middleware required
Chrome extension, official SDK
Vanderbuild take
BuiltWith is the reference tool in the Technology Lookup and Prospecting Database subcategory — if your GTM motion depends on knowing what software a prospect runs before your SDRs ever dial, this is the data layer you build around. The agentic story here is genuinely strong: BuiltWith has native MCP server support, meaning AI agents can call it directly as an orchestration layer without any custom wrapping — that's a meaningful edge over most data providers in this space. At $295/month starting, budget tier 3 is accurate — this isn't a casual purchase, and you'll want someone on the RevOps or GTM engineering side to wire it into your stack properly to get real value out of the API credits. The honest limitation is scope: BuiltWith tells you what technology a site uses, not who to call or what to say — you'll still need a contact database and a sequencing tool to close the loop on any signal it generates.
Agentic stack profile
MCP serverYesLive MCP server — agents can call this tool directly.
Provides a Model Context Protocol (MCP) Stream endpoint that enables AI agents to access live technology detection data, execute structured/context-aware queries, and integrate BuiltWith endpoints as tools within LLM agent workflows (includes WHOAMI and agent payment features).
Open MCP →APIRESTProgrammatic access available.
REST API — straightforward to call from any agent or workflow tool. Rate limits and auth vary by plan.
API docs →Agentic readinessNativeBuilt for agents from the ground up.
MCP server + agent-friendly API + at least one autonomous workflow out of the box. The bar for 'Native' is high — only a handful of tools currently qualify.
Stack roleEnricher · Data sourceWhere this tool slots into an agentic pipeline.
Plays the role of Enricher + Data source in an agentic pipeline. Use it to add firmographic, technographic, and signal data to a lead row on the fly; source contacts, companies, and the raw inputs an agent needs to act.
Builtwith alternatives
Tools that solve a similar problem — compared at a glance.
- Pricing
- Freemium
- Budget
- $$$
- Best for
- SDR / BDR, RevOps
- Readiness
- Native
- MCP
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- $$$
- Best for
- SDR / BDR, Marketing
- Readiness
- Native
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- Pricing
- Freemium
- Budget
- $$$
- Best for
- SDR / BDR, RevOps
- Readiness
- Native
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Frequently asked questions
Does Builtwith have an MCP server?
Yes — Builtwith exposes a Model Context Protocol server. Provides a Model Context Protocol (MCP) Stream endpoint that enables AI agents to access live technology detection data, execute structured/context-aware queries, and integrate BuiltWith endpoints as tools within LLM agent workflows (includes WHOAMI and agent payment features). See the MCP docs at https://api.builtwith.com/mcp.
Does Builtwith have a public API?
Yes — Builtwith ships a REST API. Docs: https://api.builtwith.com/.
How much does Builtwith cost?
Builtwith: pricing is freemium, expect higher tier ($$$) spend. Full pricing page: https://builtwith.com/plans.
Who is Builtwith best for?
Builtwith is built for SDR / BDR, RevOps, GTM Lead. Fits Mid-market (50-500), Enterprise-sized teams.
How well does Builtwith fit an agentic sales stack?
Tier: Native. Has both an MCP server and an agent-friendly API — drops into an agentic stack with minimal glue code.