The best B2B contact enrichment tools for startup sales teams in 2026

You need work emails and mobile numbers without building a data stack. Every vendor will sell you a waterfall. The hard part is picking one that can survive a customer security review, and remembering that the vendor’s DPA does not make your prospecting lawful.

Direct answer: FullEnrich is the strongest overall pick for a startup team that needs work emails and mobile numbers without building a data stack. It runs a waterfall across 25 or more providers on a single credit, prices at €55 a month for 1,000 credits with unlimited users, and backs it with a compliance posture most tools in this category do not have: SOC 2 Type II, EU hosting, a public DPA and subprocessor list, and automatic deletion of enriched data after three months. The rest of this list is about fit, plus the part almost nobody in this category writes about: what using any of these tools obliges you to do under GDPR.

Key takeaways

• FullEnrich Pro is €55 a month for 1,000 credits (€0.055 per credit) with unlimited users. A work email costs 1 credit, a personal email 3, a mobile number 10. There are 50 free credits to start, no card required. See fullenrich.com.
• Clay has the widest provider network at 150 or more, with a genuinely usable free tier, but CRM sync and API access are gated to the Growth plan at $446 a month ($185 a month billed annually).
• Dropcontact holds no contact database at all. It computes and verifies with its own algorithms on EU servers, which is a materially different legal position from every waterfall tool on this list.
• BetterContact charges only for valid results, starting at $15 a month for 200 credits, which works out to roughly 7.5 cents per verified email.
• Cognism notifies the people in its database and scrubs against Do Not Call lists in a dozen countries. It does not publish pricing.
• Prospeo is the cheapest per credit for plain email finding, from $39 a month for 1,000 credits.
• Your vendor’s DPA covers their processing. It does not cover your prospecting. When you enrich a contact and email them, you are the controller, and GDPR Article 14 puts obligations on you that no tool on this list discharges for you.

Comparison table

How we chose

We looked at four things.

First, whether the tool actually runs a waterfall across multiple providers rather than reselling one source.

Second, whether pricing is published clearly enough to model cost per contact before a sales call.

Third, how the vendor handles the personal data flowing through it, since that is the entire product.

Fourth, whether a team without a data ops person can run it.

That third criterion carries more weight here than it did in any other category we have covered. A search API sees your queries. An enrichment tool processes named individuals’ work emails, mobile numbers, and job histories, mostly without those people knowing. If you are going to do that, do it with a vendor that can show you its paperwork.

One warning about your own research: almost every “best FullEnrich alternatives” article you will find is published by a competing enrichment vendor ranking itself first. We checked pricing against each vendor’s own pricing page rather than against those roundups, and where we could not, we have said so.

1. FullEnrich: the waterfall with the paperwork to match

The core idea of waterfall enrichment is simple and worth understanding before you compare prices. Instead of querying one data provider and accepting whatever it returns, the tool queries providers in sequence until one comes back with a verified result. You pay once. Hit rates go up substantially, because no single provider has good coverage across regions and seniority levels.

FullEnrich runs that waterfall across 25 or more sources. Credits are consumed by result type: 1 credit for a work email, 3 for a personal email, 10 for a mobile number, 1 for a reverse email lookup. Pro is €55 a month for 1,000 credits, which puts a verified work email at about 5.5 cents and a mobile at about 55 cents. Unused credits roll over for three months on monthly billing and twelve months on annual. Seats are unlimited, which matters more than it sounds when the alternative is per-user pricing on a five-person sales team.

The reason it tops this list for a compliance-minded reader is the part that does not appear in feature comparisons. FullEnrich is SOC 2 Type II certified with a public trust center where you can actually pull the report. Data is hosted in the European Union on DigitalOcean. Enriched data is stored on the platform for three months and then automatically deleted, which is an actual retention policy rather than an aspiration. There is a public subprocessor list, a signable DPA covering Article 28 obligations, AES encryption at rest, and a portal for handling data subject requests. The company is headquartered in San Francisco, so the EU hosting is a deliberate choice rather than an accident of geography.

Most tools in this category answer the security question with a paragraph of adjectives. This one answers it with documents.

The honest tradeoffs: the feature surface is narrower than Clay’s. There is no workflow automation, no native CRM sync beyond Zapier, and the Chrome extension has not been maintained since 2024. If you want enrichment plus orchestration plus signals in one product, this is not that product. Also note that at 10 credits per mobile number, phone-heavy prospecting gets expensive fast: 100 mobiles a month consumes your entire 1,000-credit plan.

• Best for: a small sales or growth team that wants high hit rates on emails and phones, one predictable bill, and a vendor that can survive a customer security review.
• Who should pick something else: teams whose enrichment is one step inside a larger automated workflow with CRM writeback. That is Clay’s territory, and Clay does it better.
• Pricing: free trial with 50 credits and no card, Pro at €55 a month for 1,000 credits with unlimited users, Enterprise custom with SSO and dedicated support (fullenrich.com/pricing).

2. Clay: the most powerful, and the most work

Clay is a spreadsheet that can call 150 or more data providers, run AI research agents against each row, and chain the results into custom logic. If you want to say “find the CTO, check whether they have hired engineers in the last quarter, then find a mobile number only if both are true,” Clay is the tool that does that.

That power comes with a real learning curve and a pricing structure worth reading carefully. The free tier gives 500 actions and 100 data credits a month with unlimited seats and a 200-row table limit, which is enough to evaluate it properly. Launch starts at $167 a month ($54 a month billed annually) and adds phone enrichment and job change signals. The thing most teams get caught by: CRM auto-sync and HTTP API access only appear on Growth, which starts at $446 a month ($185 a month billed annually). If your plan was to enrich in Clay and push to HubSpot, budget for Growth from the start.

• Best for: growth teams with someone who enjoys building systems, running multi-step enrichment and signal workflows.
• Who should pick something else: a two-person team that just needs emails. You will spend more time configuring Clay than the enrichment is worth.
• Pricing: free tier, Launch from $167/mo, Growth from $446/mo, Enterprise custom (clay.com).

3. Dropcontact: the one with a genuinely different legal position

Dropcontact deserves its place here for a reason that has nothing to do with hit rates. It does not hold a contact database. It says so plainly: unlike waterfall tools, which exist to aggregate as many addresses as possible, Dropcontact works exclusively through its own algorithms, running on EU-based servers, and verifies rather than retrieves.

That distinction matters if you take GDPR seriously. A waterfall tool returns data that some provider in the chain collected about a person and stored. An algorithmic tool that derives a likely address from a name and a domain and then verifies deliverability is doing something different, and it is a much easier position to defend when someone asks where the data came from. Dropcontact markets this as a “100% GDPR-compliant guarantee,” which is a stronger claim than any vendor can really make on your behalf, but the underlying architecture is real.

The tradeoffs: it is more expensive per credit than most of this list, and coverage on mobile numbers and harder-to-find contacts will not match a 25-provider waterfall. Email Finder and CRM enrichment are also separate subscriptions with non-transferable credits, which is an annoying way to sell software.

• Best for: European teams, regulated industries, or any company whose legal counsel has opinions about purchased contact data.
• Who should pick something else: teams that need mobile numbers at volume. This is not the tool for that.
• Pricing: Starter €79/mo for 500 credits (€63.20 annually), Growth €120/mo (€96 annually), Enterprise custom from 200,000 credits a month (dropcontact.com).

4. BetterContact: you only pay when it works

BetterContact runs a waterfall across 20 or more sources and bills only on valid results. No charge for catch-alls, no charge for misses. On the Starter plan at $15 a month for 200 credits, a verified email works out to about 7.5 cents and a mobile number, at 10 credits, to about 75 cents.

The pricing-only-for-hits model is genuinely better for anyone enriching messy or international lists, where a big chunk of a waterfall run comes back empty. It removes the worst part of credit-based pricing, which is watching your balance drain on lookups that returned nothing.

• Best for: cost-sensitive teams enriching lists with uncertain hit rates.
• Who should pick something else: teams that want a broader platform. BetterContact does one job.
• Pricing: Starter $15/mo for 200 credits, Pro $49/mo scaling from 1,000 to 50,000 credits, Enterprise from $799/mo (bettercontact.rocks).

5. Cognism: the enterprise option that does the notification work

Cognism is the only vendor on this list that has built its business around the compliance problem rather than treating it as a footnote. It notifies business contacts that they are in its database within GDPR timeframes, and it screens its phone data against Do Not Call and TPS registries in the UK, US, Australia, New Zealand, Germany, France, Ireland, Spain, Portugal, Croatia, Sweden, and Belgium.

That is meaningful, and it is worth understanding exactly what it does and does not solve. Cognism’s notification covers Cognism’s own collection of the data. It does not automatically discharge your Article 14 obligations when you take a contact out of Cognism and email them, though it does put you in a far better position than sourcing from a vendor that has never told anyone anything.

The catch: no published pricing, and the sales process is a real enterprise cycle. Budget for a quote, not a self-serve checkout.

• Best for: companies doing significant phone outreach into Europe where a regulator or an enterprise customer might reasonably ask how you got the number.
• Who should pick something else: any startup that cannot commit to a five-figure annual contract, which is most of the audience for this article.
• Pricing: not published, contact sales (cognism.com).

6. Prospeo: cheap, simple, does one thing

Prospeo is straightforward email finding and verification with credit pricing that scales predictably: $39 a month for 1,000 credits, $99 for 5,000, $199 for 20,000, $369 for 50,000. Emails cost 1 credit, mobiles cost 10, same as most of this list.

There is no platform to learn and no orchestration layer. If your workflow is “here is a list of names and domains, give me emails,” this is the cheapest sensible way to do it at volume.

• Best for: high-volume, simple email finding where you handle everything else yourself.
• Who should pick something else: anyone who needs multi-provider fallback on hard-to-find contacts, or who wants a compliance story to hand a customer.
• Pricing: $39 to $369 a month by volume (prospeo.io).

Names you will see elsewhere

Apollo.io comes up in every comparison of this category, but it is a different product: a contact database bundled with a sequencer, not a waterfall enrichment layer. It is a reasonable all-in-one starting point and a poor fit if you already have an outreach tool. Hunter.io, Findymail, Enrow, and LeadMagic are all credible single-provider email finders in roughly the same price band as Prospeo. Check current pricing directly, since this category changes its packaging constantly.

The part nobody in this category writes about

Here is the uncomfortable version, and it is the reason this article exists on a compliance site rather than a sales blog.

When you enrich a contact and email them, you are a data controller. Not the enrichment vendor. You. The vendor is your processor, and the DPA you signed covers their handling of the data on your instructions. It says nothing about whether your prospecting is lawful.

That means GDPR Article 14 applies to you. Article 14 governs personal data you obtained from somewhere other than the person themselves, which is precisely what enrichment is. In practice it requires four things:

• A lawful basis, which for B2B prospecting is normally legitimate interest, with a documented legitimate interest assessment behind it. Documented means written down, not assumed.
• Notice to the person within one month, or at the latest in your first communication with them. In practice this means a clear paragraph in your first email, not a link buried in a footer.
• Naming the source of the data. Article 14(2)(f) requires this, and regulators have been explicit that a generic phrase like “public sources” or “our marketing partners” is not sufficient.
• An easy way to object, honored immediately.

This is enforced, not theoretical. France’s CNIL fined the data broker CALOGA €80,000 and fined HUBSIDE.STORE €525,000 over commercial prospecting practices, and has sanctioned multiple companies for using purchased or scraped data without informing the people in it. The pattern in those decisions is consistent: having a lawful basis does not excuse failing to tell people you hold their data and where you got it.

None of this makes enrichment off-limits. B2B prospecting under legitimate interest is lawful and normal. The gap between companies that get in trouble and companies that do not is almost never the tool they used. It is whether they wrote down the assessment, said where the data came from, and processed objections when they arrived.

So the practical move is unglamorous. Write a one-page legitimate interest assessment. Put a real source disclosure line in your first-touch email template. Wire your unsubscribe and objection handling to actually suppress the contact everywhere, not just in the sending tool. Add the enrichment vendor to your subprocessor list and your vendor inventory. That is maybe half a day of work, once.

What should you ask an enrichment vendor before you sign?

• Where does your data come from, specifically enough that I can name the source to a data subject?
• Do you notify the people in your database, and on what timeline?
• How long do you retain enriched results, and is deletion automatic?
• Where is the data hosted and processed, and who are your subprocessors?
• Do you have a current SOC 2 Type II report I can read, not a badge?
• Do you have a DPA I can sign without a sales call?
• How do you handle a data subject access or erasure request that reaches you through me?
• Do you scrub against Do Not Call registries, and which ones?

A vendor that answers all eight quickly is telling you something useful about how much scrutiny they have already survived.

Frequently Asked Questions

What is waterfall enrichment, and is it worth paying for?

It queries multiple data providers in sequence until one returns a verified result, and you are charged once rather than per provider. It is worth it because coverage varies enormously by region, company size, and seniority. Single-provider tools typically find 40 to 60 percent of a mixed list. A good waterfall pushes that meaningfully higher, and on a list you have already paid to build, the marginal cost of a better hit rate is small.

Is buying B2B contact data legal in Europe?

Yes, under legitimate interest, provided you meet the conditions. The practical requirements are a documented legitimate interest assessment, notice to the person within a month or in your first email, naming the actual source of the data, and honoring objections immediately. Those obligations sit with you, not with the vendor.

Does my enrichment vendor’s GDPR compliance cover me?

No, and this is the most common misunderstanding in the category. The vendor’s compliance covers the vendor as a processor. Your obligations as a controller, particularly the Article 14 notice, are yours to discharge. A DPA is necessary and not sufficient.

How much should I budget per contact?

Model it by result type, not by plan. On FullEnrich Pro, a work email is about 5.5 cents and a mobile about 55 cents. On BetterContact Starter, roughly 7.5 cents and 75 cents. The number that will surprise you is phones: at 10 credits each across almost every vendor here, a phone-heavy campaign costs an order of magnitude more than an email-only one.

Do I need mobile numbers at all?

Usually less than you think. Phone enrichment is where the credits go, and cold calling has legal exposure that email does not, including Do Not Call registries that vary by country. If you are calling into Europe at volume, that is the case for Cognism specifically, and it is a real one.

Should the enrichment tool be in my vendor inventory?

Yes. It processes personal data on your behalf, which makes it a subprocessor. It belongs in your inventory, on your public subprocessor list if you publish one, and in your vendor review cycle. If you are working toward SOC 2 or ISO 27001, this is exactly the kind of vendor an auditor expects to see assessed.

What happens if someone asks me to delete their data?

You have to honor it, and you need to be able to do it everywhere: your CRM, your sending tool, the enrichment platform, and any export sitting in a spreadsheet. Vendors with automatic retention limits help here. FullEnrich deleting enriched data after three months means there is simply less of it to chase. Build the suppression path before you need it, because a month is not long once a request arrives. The same access-review discipline applies when someone on your side leaves and still has a live API key.

Does any of this matter for SOC 2 or ISO 27001?

Vendor management and data handling, yes. The Article 14 obligations are GDPR rather than SOC 2, but they land in the same place operationally: a documented decision, a named owner, and evidence you actually do the thing. If your risk register does not mention how you source prospect data, that is a gap worth closing before someone else finds it.

Pick on hit rate and unit economics, because that is what the tool is for. FullEnrich at €55 a month for 1,000 credits is the best default for a small team, Clay if you are building real workflows, Dropcontact if your legal position needs to be airtight, BetterContact if you would rather not pay for misses.

Then spend the half day on the paperwork. Enrichment tools are not the compliance risk in your sales stack. Undocumented prospecting is.