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Fastbase

Know who's visiting your site

Data & Discovery
For AI agents
None readiness
About

What is Fastbase

Fastbase WebLeads sits on top of your existing web traffic and resolves anonymous visitors into named companies, surfacing the company name, website, employee contacts, pages visited, search keywords used, and traffic source — all in near real-time. It's built for SDRs, BDRs, and marketing teams at SMBs and mid-market companies who want to act on inbound interest without waiting for a form fill. The standout capability is its ability to identify the specific search keywords a visitor used before landing on your site, giving reps context before they ever make contact. Leads export directly to HubSpot, Salesforce, Pipedrive, or Excel, and Zapier handles anything outside that list. The honest limitation: match rates on smaller or less-trafficked sites can be thin, and the tool only identifies company-level visitors — it won't resolve individual anonymous users to a named person.

Data & Discovery
Capabilities

Key features

Visitor identification

de-anonymises anonymous website traffic

Native CRM integration

first-party connectors, no middleware required

Data

real-time enrichment, visitor identification, firmographic + tech-stack data

No-code automation support

works with major iPaaS platforms

Our verdict

Vanderbuild take

For SDRs and marketing teams who want to act on inbound intent without relying on form fills, Fastbase WebLeads is a straightforward visitor identification layer that does what it says — it tells you which companies visited, what they looked at, and what they searched for before arriving. On the agentic readiness front, there's no API and no MCP server, so you can't drive this from an agent or plug it into an orchestration layer without scraping the UI — that's a real ceiling if you're building any kind of automated outbound workflow. Pricing starts free and paid tiers begin around $39–$49/month, which is accessible for small teams, though you'll likely need to upgrade as lead volume and feature needs grow. The core limitation to keep in mind: match rates depend heavily on your traffic volume and visitor mix, so lower-traffic sites may find the identified lead count underwhelming relative to expectations.

Mateusz Sekta
Founder, vanderbuild
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Our Resources

The wedge

Agentic stack profile

API
Not public

No public programmatic access.

No public API. Not usable from an agent without scraping.

Agentic readiness
None

Not usable from an agent without scraping.

No public API. UI-only. Not usable from an agent without scraping, which we don't recommend.

Stack role
Signal source · Enricher

Where this tool slots into an agentic pipeline.

Plays the role of Signal source + Enricher in an agentic pipeline. Use it to surface buying intent — funding, hiring, job changes, web visits; add firmographic, technographic, and signal data to a lead row on the fly.

Compare

Fastbase alternatives

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

Fastbase(this tool)
Pricing
Freemium
Budget
$$
Best for
SDR / BDR, Marketing
Readiness
None
API
No
Leadfeeder
Pricing
Freemium
Budget
$$$
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 Fastbase have a public API?

No — there's no publicly documented API as of today. Fastbase is operated through its UI.

How much does Fastbase cost?

Fastbase: pricing is freemium, expect mid tier ($$) spend. Full pricing page: https://www.fastbase.com/pricing.

Who is Fastbase best for?

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