vanderbuild
Get in touch
← All tools

Findmassleads

Find leads by tech stack

Data & Discovery
For AI agents
APILimited readiness
About

What is Findmassleads

FindMassLeads lets you search a database of over 60 million websites by the technologies they run, then pull contact details — email, phone, and social — for the companies behind them. It's built for SDRs, founders, and agency teams at SMBs and mid-market companies who want to target prospects based on what tools they already use. The standout capability is finding similar domains by tech stack, which lets you clone a known good-fit customer into a list of lookalike targets without manual research. A free email finder and verifier are included, which helps keep bounce rates down before you load contacts into a sequence. Where it falls short: there are no native CRM integrations, so every workflow runs through CSV exports, and the data freshness cap of three months on the subscription tier means you may encounter stale contacts in fast-moving markets.

Data & Discovery
Capabilities

Key features

Prospecting database

searchable B2B contact + company directory

Data

verified emails, mobile phones, real-time enrichment, firmographic + tech-stack data

Our verdict

Vanderbuild take

FindMassLeads is a focused technographic prospecting tool — if your ICP is defined by what software a company runs, this gives SDRs, founders, and agency teams a direct way to build lists around that signal without paying enterprise database prices. On the agentic readiness front, an API exists, but with readiness rated as limited, you'll likely hit friction before you can build anything reliable on top of it — it's not a clean orchestration layer for AI agents today. At $47/month per user or a one-time $297 for the full database, it's affordable for small teams to test, though the CSV-only export workflow will slow you down if you're running high-volume sequences through a CRM. The absence of native integrations is the real ceiling here — every handoff to your outreach stack is manual, which adds friction at scale.

Mateusz Sekta
Founder, vanderbuild
Learn more

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
Data source · Enricher

Where this tool slots into an agentic pipeline.

Plays the role of Data source + Enricher in an agentic pipeline. Use it to source contacts, companies, and the raw inputs an agent needs to act; add firmographic, technographic, and signal data to a lead row on the fly.

Compare

Findmassleads alternatives

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

Findmassleads(this tool)
Pricing
Workspace-based
Budget
$$
Best for
SDR / BDR, Founder
Readiness
Limited
API
REST
Apollo
Pricing
Freemium
Budget
$$
Best for
SDR / BDR, Account Executive
Readiness
Native
MCP
Yes
API
REST
Lusha
Pricing
Freemium
Budget
$$
Best for
SDR / BDR, RevOps
Readiness
Native
MCP
Yes
API
REST
Answers

Frequently asked questions

Does Findmassleads have a public API?

Yes — Findmassleads ships a REST API. Docs: https://www.findmassleads.com/api/documentation. Note the API is rate-limited or enterprise-gated, so plan integrations accordingly.

How much does Findmassleads cost?

Findmassleads: pricing is workspace-based, expect mid tier ($$) spend. Full pricing page: https://www.findmassleads.com/pricing.

Who is Findmassleads best for?

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

How well does Findmassleads fit an agentic sales stack?

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