What is Leads10?
Leads10 is an AI-powered B2B prospecting tool that turns any company website into a ranked list of similar prospect companies with fit scores and match reasons. It answers an early-stage question — which companies should I target? — and is used alongside contact databases and outreach tools.
Short answer: there is no single "best" B2B lead generation tool, because the popular options each solve a different step of the work. Apollo, ZoomInfo, Lusha and Cognism focus on contact data. Clay focuses on data enrichment. Instantly focuses on cold email sending. Leads10 focuses on identifying which companies to target in the first place. Most teams combine two or three of these — they are not replacements for each other.
The four stages of B2B prospecting
Before comparing tools, it helps to understand the work itself. B2B prospecting usually involves four stages, and most tools specialize in one of them:
- Pick the right companies to target. Decide which businesses are a fit for what you sell.
- Find contacts at those companies. Look up names, titles, emails, phone numbers.
- Enrich and personalize. Add context — funding, tech stack, recent news.
- Send the outreach. Run the email or LinkedIn sequence and follow up.
Buying a contact database when your real problem is targeting the wrong companies will not fix the funnel. Knowing which stage you need help with is the most useful filter.
Tool-by-tool overview
The descriptions below summarize each vendor's own public positioning. We do not list pricing because plans change frequently — check each vendor's site for current numbers.
Apollo.io — Contact database and outreach
Apollo positions itself as an all-in-one sales platform centered on a large B2B contact database, with built-in email sequencing and dialer features. Teams that want contact data and outreach in one place often start here. See a side-by-side: Leads10 vs Apollo →
Clay — Data enrichment workflows
Clay describes itself as a workflow platform that connects to many third-party data sources and lets teams enrich records in a spreadsheet-style interface. Strong fit when you already have a list and want to add context to it. See a side-by-side: Leads10 vs Clay →
Instantly — Cold email sending
Instantly focuses on cold-email infrastructure: managing sending accounts, inbox warmup, and outbound campaign deliverability. Useful once you already know who you are emailing and what you want to say. See a side-by-side: Leads10 vs Instantly →
ZoomInfo — Enterprise contact and intelligence database
ZoomInfo positions itself as an enterprise-grade go-to-market platform with a large B2B contact database, firmographic data and intent signals. Typically chosen by larger sales organizations with a procurement process. See a side-by-side: Leads10 vs ZoomInfo →
Cognism — Contact data with European focus
Cognism's public positioning emphasizes phone-verified mobile numbers and compliance posture for European markets. Often considered by teams selling into the EU and UK.
Lusha — Lightweight contact finder
Lusha positions itself as a simple contact-finding tool with browser-extension and CRM integrations. Often picked by smaller teams that want something quick to adopt.
Leads10 — Company-level targeting from a domain
Leads10 is built around a different question: which companies should I be targeting? Paste any company website and the AI builds an Ideal Customer Profile and returns real prospect companies that match, each with a fit score (70–100) and a written match reason. It is intended as the first stage of the work — used before a contact tool to make sure you only pay for contacts at companies that are actually a fit. Pay-per-use credits, 5 free on signup.
How to choose
Match the tool to the stage where your funnel is actually breaking down:
- You are reaching out to the wrong companies. Start with company targeting (Leads10).
- You do not have contact information. Look at Apollo, ZoomInfo, Cognism or Lusha.
- You already have a list but it lacks context. Look at Clay.
- Your emails are not landing in inboxes. Look at Instantly.
A common stack is to use Leads10 to pick the right companies, then use a contact database to find people at those companies, then use a sending tool to run the outreach. Each tool handles the stage it is built for.
Bottom line
There is no single best tool. The biggest waste in B2B outreach is not the tool you picked — it is targeting companies that were never going to buy. Decide which stage your funnel actually breaks at, then pick the tool built for that stage.