The best free lead generation tool depends on how long you need "free" to last. Apollo.io's free tier gives you the biggest database (210M+ contacts) but burns through credits fast. Hunter.io's free plan caps at 25 searches a month — fine for occasional lookups, thin for active prospecting. Snov.io gives 50 free credits monthly with basic sequencing attached. Runvax is the only one built to stay free indefinitely for its core use case — finding local businesses with no website — because it isn't rationing access to a finite contact database, it's querying live business listings.
None of these are "the best" outright. Here's what each free tier actually gets you before you hit a paywall.
Quick Answer
| If you need... | Best free option | |---|---| | The largest contact database, occasional use | Apollo.io free tier | | Fast email verification, low volume | Hunter.io (25 searches/mo) | | Email finding + light sequencing on a budget | Snov.io (50 credits/mo) | | Ongoing local business discovery + no-website filtering | Runvax free plan | | A CRM to track leads, not find them | HubSpot free CRM |
Why "Free" Tiers All Have a Catch
Free tiers exist to get you hooked on a workflow, then charge you once you depend on it. That's not a criticism — it's just how credit-based SaaS pricing works. The catch is almost always volume: Apollo, Hunter, and Snov.io all give you real functionality for free, but ration it in credits or searches that a genuinely active prospecting habit burns through in days, not months.
Runvax's free plan works differently because the constraint isn't a shrinking credit pool — it's a daily search cap that resets every day rather than depleting permanently. That matters if you're prospecting consistently rather than in short bursts.
Full Comparison Table
| Tool | Free tier limit | Resets | What's locked behind paid | |---|---|---|---| | Apollo.io | Credit-limited access to 210M+ contact database | Monthly | Bulk export, advanced filters, sequencing at scale | | Hunter.io | 25 searches/month | Monthly | Higher search volume, bulk domain search, team seats | | Snov.io | 50 credits/month | Monthly | Drip campaigns at scale, higher credit volume | | Runvax | 5 searches/day, 20 results/search (~100 leads/day) | Daily | 20 searches/day, 60 results/search, unlimited AI outreach generation | | HubSpot CRM | Unlimited contacts, core CRM features | N/A (permanently free tier) | Marketing automation, advanced reporting |
Apollo.io Free Tier
Apollo's free plan is genuinely generous on paper — full access to its contact database with title, seniority, and industry filters. The limitation is credits: you get a capped number of email/phone reveals per month, and any real prospecting workflow (searching 50+ contacts a week) exhausts that fast. It's a strong free option if your search volume is low and your targets are companies with an existing web/LinkedIn presence. For a deeper look at where Apollo fits versus lighter tools, see Best Apollo.io Alternatives in 2026.
Hunter.io Free Tier
25 searches a month works out to roughly one search a day — usable if you're verifying a handful of emails a week, not building a prospecting pipeline. Hunter doesn't ration by "credits" in the confusing sense Apollo does; it's a flat search count, which makes it easier to track when you'll hit the wall. It's the simplest free tier to understand, just also the smallest.
Snov.io Free Tier
50 credits a month sits between Hunter and Apollo in generosity, and Snov bundles in basic drip campaign functionality that neither Hunter nor Apollo's free tier includes. If you want email finding and simple follow-up sequences in one free plan, Snov.io's tier is the most functionally complete of the three database tools — though the credit ceiling is still tight for daily use.
Runvax Free Plan
Runvax's free plan gives 5 searches a day at 20 results each — roughly 100 fresh local business leads daily, with the no-website flag included on every result, no card required. AI-generated outreach (email, WhatsApp message, or proposal) is available on the free plan too, not gated behind a paywall the way sequencing features are on the other tools. The tradeoff is scope: Runvax's free tier is deep for local SMB discovery and shallow for anything else — it's not trying to be a general contact database.
Free Non-Tool Methods Worth Knowing
Before any tool, the oldest free method is still real: manually browsing Google Maps or Facebook Business pages for listings with no website link, or checking industry directories that list phone numbers without a URL. It works, it's genuinely free forever, and it's slow — 2-3 minutes per business checked by hand versus seconds per result in a tool built to flag it automatically. Worth doing for your first 10-20 leads to understand the pattern; not worth doing at volume once you're prospecting seriously. The Pillar A guide on free lead generation strategies covers the non-tool tactics in more depth.
Which One to Actually Use
- Occasional enterprise contact lookups: Apollo's free tier, accepting the credit ceiling.
- Quick email verification, low volume: Hunter.io free plan.
- Email finding + basic sequencing on a budget: Snov.io.
- Daily local business prospecting with no-website filtering: Runvax — the only one of these that stays usable at daily volume without hitting a hard wall.
- You want a real CRM alongside whichever finder you pick: HubSpot's free tier, covered in more depth in Best CRM for Freelancers in 2026.
This is the sixth post in the lead gen comparison series — back to Best Apollo.io Alternatives in 2026, ahead to Upwork vs. Cold Outreach: Which Gets You Better Clients?, or start from the pillar hub: The Best Lead Generation Tools in 2026.
Try Runvax
If your free-tier problem is running out of credits before you run out of month, Runvax's free plan resets daily instead of monthly — 5 searches, 100 leads, AI-written outreach, no card required.