The H2 tool directory / 2026
B2B buying signal tools
Explore company funding, hiring, advertising and technology data. These tools help you find a reason to research an account; a signal alone does not prove that a company is ready to buy.
How we review tools
We look at the job a tool does, how it connects to a sales process, its costs and its limits. “Used by H2” means it is part of our work. “Researched by H2” means our notes are based on research rather than hands-on use. Each tool has a dated review with the full context.
“Best” means best for the job described. Check a small sample from your own market before committing to a larger plan. Our current focus is B2B outbound; teams running paid advertising or product-led growth will need a different mix.
H2 is a Clay Solutions Partner and a Smartlead Certified Partner. Each tool shows when its pricing and notes were reviewed. Check the linked vendor pages for current billing terms.
Buying signals6
Buying signals
Adyntel
Researching a company’s advertising activity
Credit subscriptions and pay as you go
Researched by H2Read our takeBuying signals
BuiltWith
Finding accounts by the technology on their websites
Paid plans; check current pricing
Researched by H2Read our takeBuying signals
Crunchbase
Researching private companies and funding events
Pro from $99/month on monthly billing
Researched by H2Read our takeBuying signals
PredictLeads
Tracking company events as structured data
100 free API calls/month; paid usage
Researched by H2Read our takeBuying signals
TheirStack
Finding accounts through hiring and technology data
API plans from $49/month
Researched by H2Read our takeBuying signals
Wappalyzer
Checking website technology and building targeted lists
Free lookups; paid plans available
Researched by H2Read our take
GTM implementation
Do you need someone to help you implement these tools?
H2 builds GTM systems for B2B teams. We connect your tools and data, set up the workflows and show your team how to use them.