10 Free Clay Alternatives 2026: Real Free + Open-Source Enrichment Tools

Clay's free plan exists. It is also misleading. You get a sandbox to play with the table interface, but the credits to run any meaningful enrichment workflow disappear inside a single test row. By the time you have wired up three waterfalls, hit the API limits, and tried to export your work, the upgrade prompt is already in your face — and the cheapest paid plan starts at $149/month.

If you came here because you want to enrich a list of 200 leads without paying anything this quarter, this guide is for you. We separate the tools that have a real, usable free tier from the ones that say "free" and mean "trial." We also cover the open-source path — the one nobody on a sponsored "alternatives" listicle will tell you about — because for some teams, an n8n workflow plus a Postgres database plus a couple of free APIs is a better answer than any SaaS.

By the end you will know which free tools to combine for which job, what the actual credit limits look like in April 2026, and where the free path breaks so you can decide what is worth paying for when it does.

If you are also evaluating paid alternatives, our companion guide on Clay alternatives covers the full commercial landscape, and Clay pricing 2026 walks through the credit math behind their plans.

Why "free Clay alternatives" is a confusing search

Three things muddy the water when people search for free enrichment tools.

First, almost every B2B data tool has a "free plan" page. Most of those plans are demo accounts: 25 credits, 10 lookups, "first 14 days free." That is a trial, not a free tier, and treating it as one will cost you a weekend when the credits run out mid-campaign.

Second, "free" sometimes means "free to read but not export." Crunchbase Free lets you browse company pages but caps exports hard. RB2B's free tier identifies up to 500 anonymous US visitors per month — but does not enrich them with company-level firmographics. You can use these tools, but only inside their boundaries.

Third, the open-source enrichment world barely advertises itself. Nobody runs Google Ads for "free n8n enrichment workflow." But the moment you accept that an enrichment platform is, fundamentally, an HTTP-orchestrator with deduplication and a database behind it, you realize you can build one. We will get to that.

The list below is ordered by how immediately useful the free tier is for a salesperson who needs leads enriched today, not how generous it is on paper.

1. Apollo Free — 50 email credits/month, the most-usable free B2B database

Apollo is the only major B2B database with a free plan that actually lets you build prospect lists. You get 50 email credits per month, 5 mobile credits, basic filters on companies and contacts, and the ability to export those leads to CSV. That is enough to run a small, targeted outbound campaign every month — three or four good ICP queries, fifty exports, done.

What makes Apollo's free tier the practical baseline for any "free Clay alternative" stack is not the credits. It is the database. You search 275M+ contacts and 73M+ companies, filter by job title, headcount, technology, location, funding stage — the same filters Clay users pay $149+/month to access via the People Search integration. If your only need is "give me a list of CRO heads at Series B SaaS companies in DACH with verified emails," Apollo Free does that for $0.

Limits worth knowing: no sequences on the free plan (you cannot send email from inside Apollo), no LinkedIn extension on free, and the daily export caps are tight. For sequences and outreach you will need to pair Apollo Free with one of the tools below or do the sending manually from Gmail/Outlook.

When the 50 credits run out, do not upgrade reflexively. Use them on the highest-value 50 leads of the month, then switch to a different enrichment source for the rest. Apollo's paid tier is reasonable, but the free tier is good enough that many one-person sales teams never need more.

2. Hunter.io Free — 25 searches/month, the email-verifier baseline

Hunter is the email-finding standard. Their free plan gives you 25 monthly searches and 50 verifications, both of which auto-renew on the first of every month, plus their Chrome extension and the ability to find emails on a domain ("everyone @company.com").

Where Hunter beats Apollo on the free tier is verification. Apollo's free plan exports addresses but does not always verify them. Hunter runs a real-time SMTP check, returns confidence scores, and flags catch-all domains explicitly. For a cold-email-sender that means lower bounce rates and better sender reputation — and on free plans where deliverability mistakes compound fast, that matters.

The 25-search limit is the binding constraint. A "search" is one domain query, but each query can return dozens of email patterns. So 25 searches a month is enough to enrich roughly 200–300 contacts if you batch them by domain. Combine Hunter Free with a list-builder (Apollo Free, BetterContact's trial, or a LinkedIn export) and you have a workable free finder + verifier pair.

For a deeper comparison of the email-finding landscape including Hunter's paid tiers, see our guide to the best email finder tools 2026.

3. Datagma Free — pay-as-you-go credits, no monthly commitment

Datagma is the closest thing to "free Clay" the data-enrichment world has. They do not market a free tier the way Apollo does — instead they give you a small starter credit balance and a pay-per-lookup model with no monthly minimum. If you spend $0 in a month, you pay $0.

In practice that means you can sign up, get the starter credits, enrich 30–50 leads, and never see another bill. Datagma's API is also one of the best on the market for waterfall enrichment: name + company → email + phone, with a confidence score and the source of each data point exposed. That is the workflow Clay charges premium credits for.

The catch: Datagma's free starter balance is one-shot, not monthly. Once you burn through it, you are paying per lookup (~$0.05–0.10 per email). For low-volume use cases — enriching a few VIP leads a month, occasional mobile-number lookup, deduplicating a CRM import — Datagma's pay-as-you-go model is cheaper than any paid Clay seat and you only pay when you use it. For higher volume, the per-lookup cost adds up and you should compare against subscription tools.

4. BetterContact Free Trial — waterfall enrichment to taste-test

BetterContact built its name on waterfall enrichment: instead of relying on one provider, it queries 20+ data sources in sequence, returning the first match. It is the same architectural pattern Clay popularized, and BetterContact's "Find Anyone" trial gives you 30 free contacts to see it work.

Treat BetterContact's free tier as a high-quality probe rather than a recurring lead source. Use the 30 credits on contacts that matter — a target account list, the speakers from a conference you attended, the new hires at a key prospect — where the multi-source waterfall is most likely to find an email or mobile that single-source tools missed. If the hit rate justifies it, upgrade. If not, the trial cost you nothing.

The other reason to try BetterContact free is to benchmark. Run the same 30 leads through Apollo Free, Hunter Free, and BetterContact, and compare hit rates. The result will tell you which paid tool to invest in first.

5. Lemlist Free Plan — sequences without the credit card

Lemlist is best known for cold-email automation, but their free plan also includes a small dose of email finding. It is meant as a hook for sequence sending, but for a free-Clay-alternative stack, the value is the sequence engine: you can connect a mailbox, build a multi-step cadence, send dynamic personalization (image variables, custom intro lines), and track replies — all on the free tier, within strict daily send limits.

Pair Lemlist Free with Apollo Free for list-building and Hunter Free for verification, and you have an end-to-end outbound stack at $0/month. The pieces are tighter than what Clay gives you in their free sandbox, because Clay does not send email — it just enriches.

For a fuller comparison of cold-email tools and their free tiers, see our Lemlist alternatives breakdown.

6. Crunchbase Free — company research, no contact data

Crunchbase Free is the underrated free source for company-level signal. You get unlimited browsing of company pages, founder profiles, funding rounds, news mentions, and acquisition history. You do not get contact data and you cannot export at scale, but for the "research the company before you reach out" step that Clay users typically wire into a Claygent agent, Crunchbase Free does it for nothing.

The workflow: Apollo Free gets you a list of target accounts. Crunchbase Free is your manual enrichment layer for the top 20 — funding stage, recent press, key executives, parent company. For the hour or two a week you spend on top-of-funnel research, this is faster and free-er than building a Clay automation that does the same thing.

The free plan does not include the Crunchbase API. If you need programmatic company data, the API starts at $49/month for individuals — still cheaper than Clay's entry tier.

7. Phantombuster Free Trial — automation without code, briefly

Phantombuster is the LinkedIn-and-social automation engine many "ungated" Clay workflows secretly depend on. Their free trial gives you 14 days of unlimited Phantoms (their term for an automation), enough to scrape LinkedIn searches, extract Sales Navigator lists, pull Twitter followers, and chain those into a Google Sheet.

For 14 days, Phantombuster's free trial is the most powerful tool on this list. You can replicate the LinkedIn-side of any Clay workflow — search → scrape profiles → enrich → export — without writing code. After day 14 you pay or stop. So the play is: identify the lead lists you need for the next quarter, batch them all into a two-week sprint of Phantom runs, export to CSV, and unsubscribe.

LinkedIn rate-limits and anti-automation measures change frequently. Phantombuster keeps up, which is why their free trial is more useful than a free LinkedIn scraper you spin up yourself. But know that you are working on a borrowed clock.

8. Leadmagic Free Tier — mobile numbers, modest free credits

Leadmagic is a relative newcomer with a free tier that includes a small monthly allotment of B2B mobile-number lookups. Mobile numbers are the most expensive enrichment data point on every paid platform — Clay charges premium credits, ZoomInfo gates them behind enterprise plans, Apollo's free tier gives you only 5 a month.

Leadmagic's free tier of mobile credits, modest as it is, is one of the few free ways to get verified B2B mobile numbers. For a salesperson making 30–50 high-conviction calls a month, Leadmagic Free covers a meaningful slice. Combine with Apollo Free's 5 mobile credits and you are at maybe 35–40 free mobile lookups per month — not a lot, but enough for the prospects worth dialing.

The data quality is not as deep as ZoomInfo's, but for the price (zero), it is the most accessible mobile-enrichment tool in the free tier.

9. RB2B Free Tier — anonymous-visitor identification for US traffic

RB2B is a different shape of tool. Instead of enriching lists you supply, it identifies the people visiting your website — by name, company, LinkedIn URL — even if they never fill out a form. Their free tier covers up to 500 identified US visitors per month with no credit card.

This is not a Clay replacement on the enrichment-pipeline axis. It is a complement: RB2B fills the top of the funnel (who is showing intent) and your enrichment stack (Apollo + Hunter) takes that list and reaches out. For a content-driven inbound funnel that gets a few thousand US visitors a month, RB2B Free is a meaningful free signal source. Outside the US, the free tier does not work — RB2B's identity graph is US-focused.

The 500-visitor cap is per month, not lifetime. As long as you stay under, you stay free indefinitely.

10. Snov.io Free Plan — a fourth email finder for the stack

Snov.io rounds out the free email-finder rotation. Their free plan offers 50 monthly credits (1 credit = 1 verified email or 1 verification), the Chrome extension, and basic CRM-style list management. The free plan is more restrictive than Hunter on per-action limits but more generous on monthly volume, so they pair well: use Hunter for batch domain searches, Snov for one-off lookups.

The reason to keep four free email finders in rotation rather than two is that no single source has full coverage. Apollo finds the contact who is in their database; Hunter finds the email pattern; BetterContact runs 20 sources in waterfall; Snov fills the gaps. Across all four free tiers, you are at roughly 130 free enrichments per month before you pay anyone — which is more than most one-person sales operations need.

The 11th option: build it yourself with n8n + Postgres + free APIs

Here is the section nobody else writes. The reason Clay can charge $149/month is not that they invented a magic data source — they did not. They built an HTTP-request orchestrator with a spreadsheet UI, a credit system, and 50+ pre-built integrations.

You can build the same thing for free.

The recipe:

1. n8n (self-hosted, free) — open-source workflow automation. Drag-and-drop nodes for HTTP requests, conditional logic, deduplication, transformation, and 400+ pre-built integrations including Apollo, Hunter, Crunchbase, Phantombuster, Slack, Notion, Airtable, and every major CRM. Self-host on a $5/month VPS or run locally; the software is free.

2. Postgres (free, self-hosted or managed free tier) — your enrichment database. Supabase free tier gives you 500MB of Postgres, enough for tens of thousands of enriched leads. Or run Postgres locally — also free. Schema: leads, companies, enrichment_log, indexes on email + domain. Done.

3. Free APIs in waterfall — n8n calls Apollo Free → if no email, Hunter Free → if no email, Datagma → if no email, scrape from web. Same waterfall pattern Clay charges for, except the credits are the free tiers you already have. n8n's deduplication and conditional logic mean you do not double-spend credits across the chain.

4. Optional: a custom Claude/GPT enrichment node — for unstructured tasks (parsing a job posting, classifying a website, summarizing a LinkedIn profile), call your favorite LLM API directly from n8n. The Claude/GPT cost per lead is fractions of a cent and you get more flexibility than Clay's Claygent.

The total cost of an n8n + Postgres + free-API enrichment stack: $0–5/month, depending on whether you self-host or use a managed free tier. The downside: you have to build it yourself, and you maintain the integrations when API contracts change. If you have any technical instincts at all, the build takes a weekend; if you do not, you pay for Clay.

For the marketing team that is happy with Clay's UI and just wants to pay for convenience, this is not the answer. For the technical founder, the RevOps engineer, or the small team with one builder among them, the open-source path is genuinely competitive — and the data ends up in your own database, not behind another vendor's paywall.

A note on Knowlee

We build Knowlee, an AI-native sales intelligence platform. We are not free in the strict sense — we have a paid plan that is custom-priced per company — but we do offer a free pilot for qualified teams that want to evaluate AI agents on real workflows before committing.

The fit is different from the tools above. The free tools on this list (Apollo, Hunter, Datagma, et al.) give you data — verified contacts, mobile numbers, company firmographics. Knowlee gives you reasoning on top of data — agents that read job postings, parse signals, score accounts against your ICP, draft personalized outreach, and learn from what worked. You can plug Knowlee on top of an Apollo Free + Hunter Free pipeline, or you can let it own the full workflow.

If your blocker is "I cannot afford Clay's $149/month," you are probably not yet at the scale where Knowlee makes sense — work the free tier stack, build proof. If your blocker is "Clay's automations are not smart enough and the data is shallow," talk to us.

How to combine these into a working free stack

Three real-world stacks, each $0/month if you stay within the limits.

The minimalist outbound stack (one-person founder). Apollo Free (lists + 50 emails) → Hunter Free (verify) → Lemlist Free (send sequence) → Gmail/Outlook (reply handling). 50 enriched, verified leads per month, full sequence automation, $0. This is enough for a founder doing 10 cold conversations a week.

The research-heavy stack (account executive, named-account play). Apollo Free (target list) → Crunchbase Free (manual research, top accounts) → BetterContact trial (30 high-stakes contacts) → Phantombuster trial (LinkedIn signal, batched into 14-day sprint) → Datagma free credits (mobile numbers for VIPs) → manual outreach. Higher quality per touch, lower volume. Ideal for enterprise sales motions where you have 50 accounts you care about.

The technical builder stack (RevOps engineer with one weekend). Self-hosted n8n + Supabase Postgres free tier + Apollo Free + Hunter Free + Datagma + Snov + RB2B. Custom workflows, full data ownership, infinite extensibility. The maintenance overhead is real, but so is the cost savings — and your data lives in your database, not Clay's.

When the free path runs out

The free path works until volume kills it. The signals to watch:

• You are running 200+ enrichments a month and burning through Apollo Free's 50 credits in two days.
• You need waterfall coverage — three or four data sources per lead — and managing it across four free tools is taking more time than it saves.
• You want to enrich every CRM contact automatically, which requires API access and triggered workflows that the free tiers gate.
• You need data residency, SOC2, or other compliance guarantees that no free tool will sign for.

When you hit those signals, the question becomes which paid tool to choose, not whether to pay. Our Clay alternatives guide compares the paid landscape head-to-head; Clay pricing 2026 breaks down the credit math; and our best free AI sales tools 2026 roundup covers the AI-augmented free tier (writers, scorers, schedulers) that pair with the enrichment stack above.

The takeaway: the gap between "free enrichment stack" and "paid Clay subscription" is wider than the marketing pages suggest. For a meaningful slice of one-person and small-team sales operations — every month, every quarter, every year — the right answer to "which paid Clay alternative should I buy?" is "none yet, here is the free stack." Build the discipline of running on free tools until you genuinely outgrow them. Then pay, knowing exactly what you are paying for.

Last updated April 2026. Free-tier limits and credit allotments change frequently — verify on each provider's pricing page before building a workflow that depends on a specific number.