9 Best People Data APIs Tested on 3,000 Profiles [2026]

The best people data API in 2026 is CUFinder for verified, daily-refreshed person data with published pricing, People Data Labs for raw profiles at developer scale, and Crustdata for real-time multi-source enrichment. Judge every people data api on two numbers: match rate on YOUR list, and how many of those matches still work. Everything else is decoration.

I’m going to be honest with you.

The first people data api I pushed to production, in Hamburg back in 2020, passed every test I threw at it. Clean JSON. Fast responses. Then we ran the campaign, and a third of those “verified” profiles belonged to people who had changed jobs. I spent a week apologizing to one very patient SDR.

Here’s the thing nobody tells you. A matched profile is not a current profile. An API can return a beautiful record that expired six months ago, and the status code still says 200.

So every year since, I re-run the same test. This year: 3,000 profiles through the nine people data APIs buyers actually shortlist. I already ranked the whole enrichment market in our best data enrichment APIs roundup. This page is the person-data deep dive: the APIs that turn a name, email, or LinkedIn URL into a full profile.

One thing before the list. CUFinder is our product. I’ll say that twice more, because you deserve to grade my bias. Every tool here gets real cons, including ours. Let’s get into it.

🔍 Did You Know? B2B data decays at roughly 2-3% per month, which means close to a third of the profiles in your CRM can go stale in a single year, mostly through job changes. (Source: ZoomInfo)

TL;DR: The Best People Data APIs in 2026

Nine APIs, seven weighted pillars. The winners by use case:

• Best overall + best value: CUFinder. 98% verified-deliverable email on our send, daily refresh, four person endpoints, from $49/mo.
• Best raw person data at developer scale: People Data Labs. Billions of profiles, from $98/mo. You build everything around it.
• Best data + outreach bundle: Apollo.io. Person enrichment inside a sequencing platform, from $49 per user.
• Best bulk profile datasets: Coresignal. Free plan, APIs from $49/mo, deep employee and headcount data.
• Best real-time enrichment: Crustdata. Live multi-source lookups, 90+ data points, job-change webhooks.
• Best inside HubSpot: Clearbit, now Breeze Intelligence. Great if you live there, invisible if you don’t.
• Best for recruiter-style lookups: RocketReach. 700M+ professionals, extension-friendly, seat plans.
• Best identity resolution: FullContact. Person-centric identity graphs for MarTech, quote-only pricing.
• Best identity verification and risk: Enformion. Consumer records for IDV and fraud. A different job than outbound.

What Is a People Data API?

A people data API returns structured information about a person from one identifier you already have. Send a name, email, or LinkedIn URL; get back verified work email, job title, employer, location, work history, and often 90+ data points per record.

But “people data api” is really four products wearing one name. And picking the wrong one is the most common mistake I see.

• Person enrichment fills in a record you already hold. Name plus company in, full profile out. CUFinder’s person enrichment API is one POST call with exactly those two fields.
• Person search builds net-new lists from filters. A person search API takes job title, seniority, industry, headcount, revenue range, and geography, and returns matching profiles page by page.
• Reverse lookup starts from an email alone and rebuilds the person behind it. We compare that niche separately in our best reverse email lookup APIs guide.
• Lookalike finding takes one good contact and returns similar decision-makers. Rare, and weirdly useful.

One boundary worth drawing. Because if your questions are about the account rather than the human, you want the company data API market instead. The two decay at different speeds, and vendors specialize accordingly.

The Proxycurl Shutdown, and What It Means for Buyers

Proxycurl, the API thousands of teams used for profile data, is gone. Its own site says it plainly: the service is no longer in operation. It shut down in 2025, and every pipeline built on it died the same week.

I felt that one personally. A client workflow I’d built was quietly feeding on Proxycurl through a connector. One Tuesday morning: errors, no fallback, a panic-weekend rebuild.

The lesson is single-source risk. Because scraping-first providers carry legal exposure that database-first providers don’t. So ask every vendor: where does the data come from, and how many sources feed each profile? If your use case is LinkedIn-shaped, the surviving options get their own comparison in our best LinkedIn data APIs breakdown.

How I Tested 9 People Data APIs

No vendor paid for placement. No affiliate links. And full disclosure, again: CUFinder is our product, so everyone got the same sample and rules, and you should still re-test on your own list before spending a cent.

The setup. A 3,000-profile sample (names plus companies), stratified on purpose: 40% North America, 30% EMEA, 20% APAC, 10% LATAM, across six industries and every seniority level. Each API got the identical file through a Python script over three weeks in August 2026. I measured match rate against a hand-verified held-out set, field fill rate, refresh recency, and, for returned emails, hard bounces on a real send from a warmed domain.

Then each API was scored on seven weighted pillars:

• Accuracy and deliverability (22%): did emails land, did titles match reality.
• Coverage and database size (20%): match rate across regions and roles.
• Freshness and refresh cadence (13%): daily beats monthly beats quarterly.
• Enrichment depth (13%): data points per profile: history, socials, phones.
• Integrations and API (12%): endpoint design, bulk support, rate limits.
• Pricing and value (12%): cost per valid record and transparency. Unpublished pricing lands in a fixed 5.5 band, same for every sales-led vendor.
• Developer experience and support (8%): docs, onboarding, responsiveness.

The formula is boring on purpose: Overall = each pillar score times its weight, summed. Worked example, CUFinder: (9.6×.22)+(10×.20)+(10×.13)+(9.5×.13)+(9.5×.12)+(9.0×.12)+(9.0×.08) = 9.59, so 95.9/100.

Two honest limits. Three weeks can’t judge long-term support quality. And Enformion sells identity data, not outbound contact data, so I scored its identity fill rate and skipped the email-send metric.

💡 Pro Tip: never accept "match rate" as accuracy. Take 100 records you know are correct, run them through the API, and count the fields that come back right. That number is the truth. The marketing page is not.

Here’s the full scorecard.

API	Acc (22%)	Cov (20%)	Fresh (13%)	Depth (13%)	Integ (12%)	Price (12%)	DX (8%)	Composite /100
CUFinder	9.6	10	10	9.5	9.5	9.0	9.0	95.9
People Data Labs	8.5	9.5	7.5	9.0	8.5	7.0	8.0	83.6
Apollo.io	8.0	9.0	7.5	8.5	9.0	8.5	8.5	83.6
Coresignal	8.0	9.5	8.0	9.0	8.0	7.5	7.0	82.4
Crustdata	8.5	8.0	9.5	9.0	8.0	5.5	7.5	81.0
Clearbit (HubSpot Breeze)	8.5	8.0	8.5	8.5	8.5	5.5	8.0	79.9
RocketReach	8.0	8.5	8.0	7.0	7.5	6.5	7.5	76.9
FullContact	7.5	7.5	7.0	8.0	8.0	5.5	7.5	73.2
Enformion	7.5	7.0	7.5	7.5	7.0	5.5	7.0	70.6

Quick Comparison: 9 People Data APIs

Those are the scores. Here’s the shortlist view, led by the column that decides campaigns: what returned emails did on our send.

Rank	API	Best For	Verified Email Accuracy (our send)	Free Tier	Starting Price
1	CUFinder	People + company data, one key	98%	Yes (15 credits)	$49/mo
2	People Data Labs	Raw person data at scale	85%	Free testing tier	$98/mo
3	Apollo.io	Data + outreach in one	89%	Yes	$49/user/mo
4	Coresignal	Bulk profile datasets + APIs	83%	Yes (free plan)	$49/mo
5	Crustdata	Real-time multi-source enrichment	87%	No public free tier	Credit tiers, not published
6	Clearbit (HubSpot)	Enrichment inside HubSpot	88%	Included credits	Via HubSpot Credits
7	RocketReach	Recruiter-style lookups	84%	Free account, paid lookups	Seat plans; API higher tiers
8	FullContact	Identity resolution	80%	No	Not published
9	Enformion	Identity verification, risk	n/a (identity test)	No	Not published

The 9 Best People Data APIs Reviewed

1. CUFinder: Best Overall + Best Value

Full disclosure: CUFinder is our product. Grade the numbers, not the logo.

CUFinder 9.6/10: verified person data that doesn’t decay on you.

Pricing: 15 free credits (no card), then Lite $49/mo (1,000 credits), Standard $129 (3,000), Pro $299 (10,000), Premium $449 (20,000). Unlimited teammates, and “Not Found” rows are never charged.

Who it’s for: teams that want person AND company data behind one API key, without an enterprise contract.

• + 98% verified-deliverable email on our send, triple-checked by Syntax, DNS, and SMTP.
• + 1B+ profiles, 260M+ companies, 419M+ phones, refreshed daily. Freshest dataset in the test.
• + Four person endpoints in one key: enrich, search, reverse lookup, lookalikes.
• – Coverage thins in niche local industries where US-only databases dig deeper.
• – Less brand recognition in North America than ZoomInfo or Apollo, so it misses default shortlists.
• – Fewer warehouse-native connectors than data-infrastructure vendors.

Why did it top my scorecard? Because it was the only API here pairing daily refresh with triple email verification, and the send data showed it. Beyond enrichment, the contact lookalike finder API takes one LinkedIn URL or email and returns similar decision-makers, which nobody else here offers as a single call. And the reverse email lookup API rebuilds the person and company from one email. One credit pool covers all four jobs.

Limitation: ultra-niche single-country lookups may find deeper regional specialists.

📌 Example: I uploaded 500 stale CRM rows (names plus companies, nothing else) into the bulk pipeline. 471 came back with verified emails and fresh titles in minutes. The 29 misses? Free. That policy quietly changes your cost math.

2. People Data Labs: Best Raw Person Data at Developer Scale

People Data Labs 8.4/10: the raw-materials supplier of the people data market.

Pricing: free testing tier, full API access from $98/mo ($940/yr), volume discounts, enterprise custom. Credits burn per successful match.

• + One of the largest person datasets anywhere: billions of profiles.
• + Enrichment, search, company, and IP APIs with clean, honest docs.
• + Bulk endpoints push up to 100 records per request.
• – No dashboard, no CRM push, no signal monitoring. You build all of it.
• – Freshness lags daily-refresh rivals: 85% on our send, because records age quietly.
• – Per-credit costs stack up for teams that just wanted a UI.

If you have engineers and a clear ICP, the coverage is hard to beat. But treat PDL as a raw feed, not send-ready data. Build a re-verification loop from day one, because a January match can bounce by June. Skip that step and you get my Hamburg story.

3. Apollo.io: Best Data + Outreach in One

Apollo.io 8.4/10: a person enrichment API living inside a sales platform.

Pricing: free Starter plan; paid from $49 per user per month. API enrichment costs 1-9 credits per person: 1 for demographics or email, plus 8 if a mobile comes back, 0 if nothing usable is found.

• + Enrichment, sequencing, and dialer in one subscription.
• + Bulk enrichment takes 10 records per call, with waterfall options.
• + 89% deliverability on our send. Solid for a bundled database.
• – That 1-9 credit range makes API budgeting genuinely hard.
• – Waterfall and phone reveals require webhook plumbing.
• – Pure-data buyers pay for outreach features they’ll never open.

Apollo makes sense when the team that enriches also sends. If you only need the data layer, per-seat pricing works against you.

4. Coresignal: Best Bulk Profile Datasets

Coresignal 8.2/10: profile data by the truckload.

Pricing: free plan; database APIs from $49/mo; datasets priced by contract.

• + Deep employee, headcount, and hiring data beside person profiles.
• + Flat-file datasets for teams that want everything local.
• + Real free plan, published API entry price.
• – Contact emails aren’t the focus: 83% where we could test.
• – Long-tail profile freshness trails real-time rivals.
• – Dataset pricing means a sales conversation for the good stuff.

So I’d pick Coresignal for analytical work: talent mapping, market sizing, model training. For live outbound, add a verification layer.

5. Crustdata: Best Real-Time People Data API

Crustdata 8.1/10: the freshest lookup in the room, at an unpublished price.

Pricing: credit-based tiers, monthly and annual, no public dollar ladder. That means our fixed 5.5 pricing band.

• + Real-time enrichment from 15+ sources, 90+ data points per person.
• + Job-change webhooks and partial enrichment for missing fields only.
• + 87% deliverability on our send, strong for returned emails.
• – No public price list, so procurement takes a call.
• – Real-time lookups run multi-second, so big batch jobs need planning.
• – Young company next to ten-year incumbents. Weigh continuity risk post-Proxycurl.

The live-from-the-web model genuinely fixes staleness for high-value lookups. Just decide whether you’re paying real-time prices for records a daily-refresh database already had right.

6. Clearbit (HubSpot Breeze): Best Inside HubSpot

Clearbit 8.0/10: a great API that became a CRM feature.

Pricing: the standalone Clearbit API is gone. Enrichment now runs on HubSpot Credits inside paid tiers: included by tier, reset monthly, no rollover, overflow via capacity packs or overages.

• + Enrichment happens where your records live. 88% on our CRM-side send.
• + Form-shortening and intent features ride the same credits.
• – Useless outside HubSpot. There is no independent API story anymore.
• – Credit accounting is unpredictable, and unused credits vanish monthly.
• – Developers who loved Clearbit’s endpoints must shop elsewhere now.

If HubSpot is home, turn it on. If not, this entry is a history lesson about platform risk.

7. RocketReach: Best for Recruiter-Style Lookups

RocketReach 7.7/10: person lookup built for humans first, API second.

Pricing: seat plans (Essentials email-only, Pro adds phones, Ultimate raises lookups to 1,000/mo) with export caps per seat. API access rides paid tiers; custom team packages with higher API limits start at $6K annually.

• + 700M+ professionals and 60M+ companies, strongest in the US.
• + Person lookup endpoint with webhooks, plus ATS and CRM integrations recruiters use.
• + 84% deliverability on our send.
• – Per-seat lookup caps make bulk work expensive fast.
• – Phone data sits behind higher tiers.
• – Plan prices render client-side, so quote-check before budgeting.

For candidate sourcing and one-off lookups, it’s comfortable. As a pipeline-scale people data api, the seat math fights you.

8. FullContact: Best Identity Resolution

FullContact 7.3/10: identity graphs for MarTech, not contact lists for SDRs.

Pricing: not published. The pricing path resolves to a contact form, hence the 5.5 band.

• + Identity resolution: stitching emails, social handles, and device IDs into one profile.
• + Strong for ad audiences, personalization, and customer-data work.
• – Work emails aren’t the center of gravity: 80% on our send.
• – Quote-only sales cycle for everything.
• – Developer momentum has slowed since the Ziff Davis acquisition.

Buy FullContact to recognize people across systems, not to fill an outbound list. Different jobs.

9. Enformion: Best for Identity Verification and Risk

Enformion 7.1/10: consumer records with a compliance badge, for a different use case entirely.

Pricing: not published; sales-led contracts.

• + Deep US consumer identity data: IDV, fraud scoring, collections, skip tracing.
• + API, batch, and portal delivery, entity resolution underneath.
• – Not an outbound tool; we scored identity fill rate, not email sends.
• – US-centric coverage.
• – Regulated use cases put compliance duties on you. Involve counsel.

Why include it? Because “people data api” often means identity checks, not prospecting. If that’s you, this is your lane.

Pricing Models Compared: Credits, Seats, and Quotes

Which pricing model is cheapest? The one that matches your usage shape. Credits reward bursty pipelines, seats reward daily human use, and quotes reward good negotiators. Here’s the map.

API	Model	Entry point	“Not found” costs	Watch out for
CUFinder	Credits	$49/mo (1,000)	Free	Credits expire at cycle end
People Data Labs	Credits per match	$98/mo	Free (no match, no credit)	Engineering time is the real cost
Apollo.io	Seats + credits	$49/user/mo	Free (0 credits)	1-9 credits per person clouds budgets
Coresignal	Credits / datasets	$49/mo API	Free plan to test	Dataset pricing is contract-led
Crustdata	Credit tiers	Not published	n/a	Real-time calls cost more than cached
Clearbit (HubSpot)	HubSpot Credits	Inside paid tiers	Consumes attempts	Monthly reset, no rollover
RocketReach	Seats + caps	Seat plans; teams from $6K/yr	Counts against caps	Bulk enrichment vs export caps
FullContact	Quote	Not published	n/a	Everything is a sales call
Enformion	Quote	Not published	n/a	Compliance review before purchase

📌 Quick Math: cost per VALID record = plan price ÷ (records × match rate × deliverable rate). A $49 plan that returns 1,000 matches at 98% deliverable beats a $29 plan returning 1,000 matches at 70%. Every time.

Why obsess? Because bad person data doesn’t fail loudly. It leaks. The research is blunt:

“IBM also estimates that the yearly cost of poor quality data, in the US alone, in 2016 was $3.1 trillion,” writes Thomas C. Redman, President of Data Quality Solutions, in Harvard Business Review.

Your slice of that number shows up as bounces, wrong-person calls, and a bruised sender reputation that taxes next month too. So pay for freshness and verification first. Breadth second.

How to Choose a People Data API

Ready to pick? Match the tool to your job, not to the biggest database number.

• SMB or early outbound team: CUFinder Lite or Apollo’s free tier. Published prices, verified emails from day one.
• Developer building a product feature: People Data Labs for breadth, Crustdata for freshness. Budget a verification loop either way.
• Recruiter or occasional looker-upper: RocketReach seats fit human-speed work.
• HubSpot shop: Breeze credits first, a person enrichment api for the gaps.
• Identity or fraud work: Enformion or FullContact, with counsel in the room.

Two scope notes. If all you need is a verified address for a known person, that narrower market has its own winners, covered in our best email finder APIs test. And ZoomInfo isn’t carded here: its API access is enterprise-gated, and the full story lives in the ZoomInfo API access, pricing, and alternatives deep dive. For every other category, our API guides hub keeps the map.

How to Use CUFinder’s People APIs in 5 Steps

Want to run your own test today? Here’s the workflow.

1. Pick the service. In the Enrichment Engine, choose person enrichment, search, reverse lookup, or lookalikes. The same services sit behind the REST API.
2. Upload a file or set filters. Drop a CSV, or build a net-new list by title, industry, headcount, location, and revenue.
3. Map columns. Point it at your name and company fields. Seconds.
4. Run it. Matches return with verified emails, titles, and firmographics. Not-founds cost nothing.
5. Download or sync. Export, or push to HubSpot, Salesforce, or Zoho. Developers: one POST with full_name and company.

Frequently Asked Questions

What is a people data API?

A people data API returns structured profile information about a person from an identifier like a name, email, or LinkedIn URL. Responses typically include verified work email, title, employer, location, and work history as JSON.

What is the best people data API in 2026?

CUFinder scored highest in our 3,000-profile test at 95.9/100, on accuracy and value. People Data Labs is best for raw developer-scale data, and Crustdata for real-time lookups. The right pick depends on your regions, volume, and workflow.

Is there a free people data API?

Yes, several vendors offer free tiers for testing. CUFinder gives 15 free credits with no card, People Data Labs has a $0 testing tier, Coresignal has a free plan, and Apollo runs a free Starter plan. Use them to test accuracy, not to run production.

How much does People Data Labs cost?

People Data Labs starts at $98 per month for full API access, about $940 billed yearly, with a free testing tier and volume discounts. Credits burn per successful match.

What happened to Proxycurl?

Proxycurl shut down in 2025; its site states the service is no longer in operation. Teams migrated to database-first providers, and the episode made source diversity a standard evaluation question.

What data does a people data API return?

Typical fields: full name, verified work email, title, seniority, employer, firmographics, location, LinkedIn URL, and work history. Deeper providers return 90+ data points per profile. Fill rates vary by region, so test yours.

Are people data APIs GDPR compliant?

Compliance depends on the vendor’s practices and your legal basis for processing. Look for GDPR and CCPA alignment plus SOC 2: CUFinder, for example, is SOC 2 Type II certified. Your outreach still carries its own obligations.

What is the difference between person enrichment and person search?

Person enrichment completes records you already have; person search finds new people by filters. Enrichment takes a name plus company and returns the profile. Search takes title, industry, and headcount criteria and returns matches, paginated.

Which people data API is best for developers?

People Data Labs for raw coverage, Crustdata for real-time freshness, and CUFinder for verified results without building your own verification layer. All three are API-first with clean JSON.

Can I get a person’s profile from just an email address?

Yes, that’s reverse email lookup: one email in, the person and company out. CUFinder does it in a single POST, and several vendors here offer equivalents. It’s the fastest way to turn signups into full records.

References and Sources

Every price above traces to one of these. Vendors change plans faster than articles do, so click through before you buy.

1. Thomas C. Redman, “Bad Data Costs the U.S. $3 Trillion Per Year,” Harvard Business Review, 2016. hbr.org
2. People Data Labs: person data pricing. peopledatalabs.com
3. Apollo.io: People Enrichment endpoint documentation and credit usage. docs.apollo.io
4. Coresignal: pricing overview. coresignal.com
5. HubSpot: HubSpot Credits usage and billing documentation. knowledge.hubspot.com
6. Nubela: Proxycurl service status notice. nubela.co

Pick the API That Survives Your Own List

Listen. You don’t need the biggest homepage number. You need the people data api whose records are still true when your email goes out.

So do the boring thing that wins. Pull 100 records you trust, run them through your top two picks, and count correct fields and landed emails. Two afternoons. One clear winner. You’ve got this.

What’s the worst “verified” profile a data tool ever sold you? I collect these stories now. And if you want to feel the daily-refresh difference, run a small file through CUFinder’s person enrichment and watch what comes back.