Last checked on 17 October 2026, from BuiltWith's own website. If something here is out of date, tell us and we will correct it.
The short answer
BuiltWith is a technology lookup and lead-list tool. It detects the technologies websites use, records when each one was first and last seen, and exports lists of companies to your CRM.
Coolie is an AI GTM agent for outbound. It finds companies at a moment of change, such as dropping a competitor or nearing a likely renewal, keeps those that fit your ICP, finds the decision makers, and writes and sends personalized email and LinkedIn sequences from your own accounts.
If you need technology data at scale, BuiltWith is built for it. If you want those changes turned into conversations, Coolie is.
Coolie vs BuiltWith at a glance
| Coolie | BuiltWith | |
|---|---|---|
| What it is | An AI agent that runs outbound, from the signal to the sent message | A database of the technologies websites use, with lists, exports and an API |
| How tools are detected | Coolie watches for changes in the software companies use and dates each change | From what a website shows publicly: its pages, scripts, headers, DNS and TLS records |
| Companies that stopped using a tool | Competitor Churn: companies that cancelled, downgraded or stopped using a competitor's product in the last 90 days | "Used to use" filters, competitor comparison reports and usage alerts |
| Likely renewals | Competitor Renewal: companies that adopted a competitor 9 to 12 months ago and still use it | First-detected dates, which BuiltWith's help center suggests using to estimate renewal windows |
| Other signals | Hiring, funding, acquisitions, job changes, LinkedIn engagement and intent topics | Filters for funding and acquisition news, and for careers or pricing pages, read from websites |
| People to contact | Decision makers who match your ICP's job titles, with work emails and phone numbers charged only when found | Names, titles, emails and phone numbers a company publishes on its own website |
| Research and writing | A research brief and a personalized sequence for the leads you pick | Not offered |
| Sending | Email and LinkedIn from your own accounts, within the daily limits you set | Not offered: lists sync to CRMs such as Salesforce and HubSpot |
| Price | 7-day free trial, then Starter at $123/month | Free single-site lookups; plans with lists from $295/month (Basic), $495 (Pro) and $995 (Team) |
What BuiltWith does well
- Breadth and history. BuiltWith says it tracks more than 127,000 technologies, and it keeps the dates each one was first and last detected on a site.
- Lists at scale. You can list the companies that use, used to use or never used a technology, and download as many as you need.
- Alerts and APIs. Usage alerts flag when sites start or stop using a technology, and its APIs bring the same data into your own tools.
- CRM sync. Lists sync to Salesforce, HubSpot, Zoho, Dynamics 365 and Pipedrive, among others.
Where Coolie is different
BuiltWith answers "who uses this technology?". Coolie is built to answer "who should we talk to this week, and what do we say?".
- It starts from a change. Competitor Churn finds companies that cancelled, downgraded or stopped using a competitor's product in the last 90 days. Competitor Renewal finds companies that adopted a competitor 9 to 12 months ago and still use it, so a yearly contract is likely to renew in the next 3 months. Tech Used finds the companies that use a given tool today. You can name up to five competitors per signal.
- It keeps the companies that fit your ICP, by industry, company size and location.
- It finds the decision makers whose job titles match your ICP, and scores each lead.
- It researches the leads you pick and writes a brief and a personalized email and LinkedIn sequence for each.
- It sends from your own mailbox and LinkedIn account, spread over your working hours and within the daily limits you set. Replies land in one inbox.
Every lead shows the signal it was found on, so your team always knows why it is reaching out.
Who should choose BuiltWith
- You sell to companies defined by the technology on their website, such as the users of an e-commerce platform.
- You need large lists, technology history or market-share research.
- Your team already has the tools and the people to turn lists into outreach.
Who should choose Coolie
- You want the companies that are changing tools now, not everyone who uses one.
- You want the decision makers found and the outreach written and sent for you, from your own email and LinkedIn.
- You would rather not connect a data tool, a contact database and a sequencer yourself.
Can you use both?
Yes. A team can size a market with BuiltWith and use Coolie to work the companies showing a signal now. Coolie exports to CSV and pushes leads to HubSpot, Pipedrive, Instantly, Smartlead, HeyReach and Salesforge.
FAQ
Can BuiltWith find companies that stopped using a competitor?
Yes, for technologies it can detect on websites: its reports can filter the companies that used to use a technology, and its alerts flag sites that stop using one. Coolie's Competitor Churn signal finds companies that stopped using a competitor's product in the last 90 days, then finds their decision makers and writes to them.
Can either tool tell when a competitor's contract renews?
Neither sees the contract itself. BuiltWith suggests estimating renewal windows from the date a technology was first detected. Coolie's Competitor Renewal signal works from the adoption date too: a company that adopted a competitor 9 to 12 months ago and still uses it is likely to renew within 3 months.
Is Coolie a BuiltWith alternative?
For outbound, yes: Coolie goes from the signal to the decision makers and the messages. For technology research at scale, BuiltWith's database is the deeper tool.
How much do they cost?
BuiltWith offers free single-site lookups; its plans with lists cost $295 a month (Basic), $495 (Pro) and $995 (Team). Coolie starts with a 7-day free trial, then the Starter plan is $123 a month: see pricing.
Product names belong to their owners. BuiltWith's features and prices come from builtwith.com/plans and builtwith.com/all-features, checked on 17 October 2026.