About StackPeep — Free Company Tech Stack Lookup

What is StackPeep?

StackPeep is a free company tech stack lookup for developers, founders and researchers. Enter a company name or public domain to explore technology signals from its website and software providers recorded from public disclosures. You can run a lookup without creating an account. Results are a starting point for research into a company's public technology footprint.

Run a free company lookup · Browse reviewed company examples

What is StackPeep useful for?

• Checking a website's visible technologies. Look for clues about frameworks, analytics, hosting and other tools exposed by a public site.
• Discovering software vendors. Explore tool names, short descriptions and vendor links before investigating a product yourself.
• Preparing company research. Use public signals and disclosed providers to decide which questions to ask a company about its software.
• Learning from examples. Start with the Linear, Vercel, Notion, Cursor, Supabase or Stripe buttons on the company lookup page. Their presence does not imply endorsement.

Why use StackPeep?

The lookup is free and requires no account. One company name or domain opens a visual view of its recorded tools, with links to vendors. The result's Sources and scan date panel distinguishes website signals and disclosed providers, with individual citations where available. Reviewed company pages preserve dated, source-backed snapshots. Older entries without individual evidence are marked. The interface and explanatory pages are available in English and Simplified Chinese.

These features make StackPeep useful for a quick first look. The public evidence also gives you places to continue your research. Read the data methodology before treating any match as a fact about a company's internal systems.

How do I find a company's tech stack?

1. Open the company lookup and enter a company name or public domain, such as linear.app.
2. Run the lookup. A recent cached record may be returned; otherwise, the scanner checks the public website.
3. Select a tool to open its vendor website. Open Sources and scan date to review the record's evidence labels, date and public source links.
4. Check important findings against the company's current website, documentation or disclosures. New scans and reviewed company pages include an individual source, observation date and matching evidence for each finding. Older entries without item-level evidence are marked. Company-level links alone do not prove every item.

When should I verify elsewhere?

StackPeep cannot provide a complete internal software inventory. Website mentions, examples and third-party scripts can produce false positives. A disclosed subprocessor may serve only one product or purpose. A missing tool does not prove that a company does not use it. For procurement, security reviews or architecture decisions, request current information directly from the company.

Frequently asked questions

Is company lookup free?

Yes. Public company lookups do not require payment or an account. Paid sponsor placements are a separate advertising offer.

Can StackPeep scan any website?

You can submit a public company domain. A site may block requests, expose too few recognizable signals or be temporarily unavailable. In those cases, the lookup can fail or find no tools. Private network addresses and non-web URLs are rejected.

Are results always live?

No. Cached company records may be reused for up to seven days. The displayed scan date belongs to the record and does not mean that every listed tool was independently verified on that date.

Does paying for sponsorship change the results?

No. Sponsor cards are paid placements. Sponsorship does not change a company's tool list, evidence labels or detection results.

About the service and corrections

StackPeep operates the company lookup, its public visit statistics and sponsor placements. Tool and company names belong to their respective owners. Listing a company or a vendor does not imply a partnership or endorsement.

To report a wrong result, open a support ticket; sign-in is required. Include the company domain, the tool name and a current public source explaining the correction. See the Privacy Policy and Terms of Service for how the service handles data and use.