Free / Open-sourceBuild GTM systems that turn data into revenue
Crustdata records 100,533 monthly visits with +1.2% month-over-month growth and Contact for Pricing pricing. LinkupAPI records 37,347 monthly visits with +7.1% growth and Paid pricing.

One outreach API to reach prospects on LinkedIn, email, WhatsApp and iMessage
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | crustdata.com | linkupapi.com |
| Pricing Model | Contact for Pricing | Paid |
| Monthly Visits | 100.53K (100,533) | 37.35K (37,347) |
| MoM Traffic Delta | +1.24K (+1.2%) | +2.46K (+7.1%) |
| Primary Market & Share | 🇺🇸 United States (38.2%) | 🇳🇱 Netherlands (25.6%) |
| Direct Visits / mo | 43.88K | 7.87K |
| User Rating | 4.5 | 4.3 |
| Supported Platforms | Website | Website |

Real-time B2B people and company data for AI agents
Every indexed web page is parsed and resolved into a single graph of people and companies that is re-verified continuously instead of archived.
Compose structured conditions over headcount, headcount growth, funding raised, locations and more, with no filter menus or fixed list limits.
Drop the entire graph into an AI agent with a one-line MCP configuration so it can search, enrich and monitor without bespoke integration code.
Track role changes, funding events and hiring activity on the accounts and people you care about, so agent workflows act on what changed rather than what was true last quarter.

One outreach API to reach prospects on LinkedIn, email, WhatsApp and iMessage
Send on LinkedIn, email, WhatsApp and iMessage with the same request format, and receive all replies on a single webhook.
Search people, pull full profiles, company details, job postings and funding rounds as JSON for your product or agent.
Verify, find and enrich professional email addresses at scale, with real-time deliverability checks.
Run searches, messages and reply reads from Claude, ChatGPT, Cursor or any MCP-compatible client.
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