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Vector

Know who's on your site, then act on it.

Data & Discovery
For AI agents
APILimited readiness
About

What is Vector

Vector identifies anonymous website visitors and maps their activity to verified contacts using device fingerprinting and a publisher network, then turns that data into ad audiences you can push directly to LinkedIn, Google, or Meta. It's built for B2B marketing teams, SDRs, and AEs at SMB and mid-market companies who need to know who is actually showing up on their site — and who is researching competitors or adjacent topics off-site. The standout capability is its off-site research tracking: Vector can surface contacts conducting market research across its publisher network, not just on your own domain, giving you intent signals before a prospect ever lands on your page. It also connects to your CRM, so identified contacts can feed directly into existing lead management workflows. That said, Vector is purpose-built for advertising activation — teams looking for deep sales sequencing, outbound automation, or enrichment beyond contact identification will need to pair it with other tools.

Data & Discovery
Capabilities

Key features

Visitor identification

de-anonymises anonymous website traffic

Data

intent signals, visitor identification, firmographic + tech-stack data

Outbound webhooks

event-driven integrations

Our verdict

Vanderbuild take

Vector sits squarely in the visitor identification and intent signal category, and for marketing teams and SDRs at growth-stage B2B companies who want to turn anonymous site traffic into targetable ad audiences, it does that job with more contact-level specificity than most tools in this space. On the agentic readiness front, an API is available, but agentic readiness is rated Limited — you can pull data out programmatically, but don't expect to build a reliable autonomous workflow on top of it without hitting friction; there's no MCP server and the API depth isn't documented publicly enough to build confidently. Pricing is not publicly listed, so budget conversations will happen before you can evaluate fit, which adds friction for smaller teams trying to move fast. The honest limitation here is scope: Vector is an advertising activation layer, not a full GTM data platform — if you need enrichment, sequencing, or outbound beyond ad targeting, you'll be stitching in other tools alongside it.

Mateusz Sekta
Founder, vanderbuild
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Our Resources

The wedge

Agentic stack profile

API
REST

Programmatic access available.

REST API — straightforward to call from any agent or workflow tool. Rate limits and auth vary by plan.

API docs →
Agentic readiness
Limited

Usable but with caveats — rate limits, brittle endpoints.

API exists but is rate-limited, brittle, undocumented, or hidden behind enterprise plans. Use with caution in production agent workflows.

Stack role
Signal source

Where this tool slots into an agentic pipeline.

Plays the role of Signal source in an agentic pipeline. Use it to surface buying intent — funding, hiring, job changes, web visits.

Compare

Vector alternatives

Tools that solve a similar problem — compared at a glance.

Vector(this tool)
Best for
SDR / BDR, Marketing
Readiness
Limited
API
REST
Leadfeeder
Pricing
Freemium
Budget
$$$
Best for
SDR / BDR, Marketing
Readiness
Capable
API
REST
RB2B
Pricing
Freemium
Budget
$
Best for
SDR / BDR, Founder
Readiness
Capable
API
REST
Answers

Frequently asked questions

Does Vector have a public API?

Yes — Vector ships a REST API. Docs: https://learn.vector.co/collections/3739054118-help_center. Note the API is rate-limited or enterprise-gated, so plan integrations accordingly.

Who is Vector best for?

Vector is built for SDR / BDR, Marketing, Account Executive. Fits SMB (1-50), Mid-market (50-500)-sized teams.

How well does Vector fit an agentic sales stack?

Tier: Limited. An API exists but it's rate-limited, brittle, or enterprise-gated. Plan integrations carefully.