10 Best Data Enrichment APIs in 2026 (Tested)

1. People Data Labs: Best for developers building on person and company data

What it does: A developer-first API and dataset for person, company and job posting data. Best for: Product and data teams that enrich sign-ups, CRM records or their own app with person and company fields.

People Data Labs (PDL) sells to engineers first: you get an API key, docs and SDKs, and the dashboard comes second. Its Person Enrichment API bills per match, so a lookup that comes back empty costs nothing. The free plan is good for testing (100 credits a month) but hides emails, phone numbers and addresses until you pay.

Key features

• Pay per match: PDL's docs say it charges "per match", and a lookup with no match returns a 404, so you pay only for records it found.
• Person, company and job data: separate person and company price lists, plus a job posting dataset in beta.
• Bulk licensing: Enterprise customers can take data license feeds and skip record-by-record calls.
• Published rate limits: 100 requests a minute on the free plan and 1,000 a minute for paying customers.

Pros and cons

• ✅ Free API key with 100 credits a month and easy sign-up
• ✅ Billing per match keeps tests cheap
• ✅ Annual plans save 20%
• ❌ Contact data (emails, phones, addresses) is hidden on the free plan
• ❌ Built for developers, with no prospecting app for a sales rep
• ❌ Few public reviews: G2 lists 17 for its main profile

What users say

G2 has only a handful of PDL reviews, and the one on its pros-and-cons page is critical. The reviewer titled it "Was nice while it worked, which wasn't long" and wrote: "I tried out their free trial, and was reasonably satisfied. I then switched to a paid plan, 100USD / month." (G2). G2's summary of that review mentions an account disabled without warning and slow support.

Pricing

• Free: $0, up to 100 credits a month, contact data obfuscated
• Pro: starting at $98 a month billed monthly, or $940 a year billed yearly (20% off), from 350 credits a month, contact data included
• Enterprise: custom pricing on annual contracts

From the People Data Labs pricing page, checked November 4, 2026.

Bottom line

Pick PDL if you write code and want person or company fields in your own product, billed only when a record matches. Skip it if your reps need a point-and-click tool: Apollo or Lusha suit them better.

2. Apollo.io: Best for enrichment inside a sales platform

What it does: A sales platform with a contact database, sequences and a dialer, plus enrichment by CSV, CRM sync and API. Best for: Small and mid-size sales teams who already prospect in Apollo and want their CRM filled from the same data.

Apollo makes the most sense if you also want the rest of a sales stack. API enrichment comes with paid plans from $49 a seat a month (billed yearly), and the People Enrichment endpoint charges only "if credit-consuming data is found". Watch the credit math, though: an email costs 1 credit and a mobile number 8.

Key features

• People and organization enrichment endpoints: 1 to 9 credits per person and 1 credit per organization, per Apollo's API pricing docs.
• Waterfall enrichment: paid plans can fall back to partner data when Apollo's own record is empty.
• CSV and CRM enrichment: the same credits enrich an upload or your CRM on a schedule.
• Pooled credits: granted to the whole team at the start of each billing cycle.

Pros and cons

• ✅ Free plan with API access and 900 credits a seat a year
• ✅ No charge when the API finds nothing billable
• ✅ Enrichment, sequences and dialer on one bill
• ❌ Mobile numbers cost 8 credits each, so phone-heavy enrichment drains credits fast
• ❌ Unused credits expire at the end of each billing cycle
• ❌ Reviewers report stale contact records (225 mentions in G2's summary)

What users say

"The biggest issue is data accuracy. Some contact details are outdated, and not every website visitor can be identified." (Srijita G., G2)

On cost, another reviewer wrote: "When you get to a list of 1500 - 2000 potential lead contact numbers and emails it gets a bit pricy." (Kevin K., G2)

Pricing

• Free: $0, 900 credits per seat per year
• Basic: $49 per seat per month billed yearly, 30,000 credits per seat per year
• Professional: $79 per seat per month billed yearly, 48,000 credits per seat per year
• Organization: $119 per seat per month billed yearly, at least 3 seats, 72,000 credits per seat per year

Yearly billing saves 24% against monthly. From the Apollo pricing page and API pricing docs, checked November 4, 2026.

Bottom line

Pick Apollo if your reps work in it every day and you want the API to fill the CRM from the same database. Skip it if you only need an API: you'd pay per seat for an app nobody opens.

3. Coresignal: Best for bulk company, employee and job records

What it does: Company, employee and job posting data collected from public web sources, through APIs or bulk datasets. Best for: Data teams, investors and product builders who need many full records with history.

Coresignal is the most open about price of the large-dataset vendors here: eight self-serve plans on one page, from $49 a month for 2,500 credits to $5,000 for 10 million. Its Company API page lists 72M+ company records with 500+ fields each. A full company or employee record costs 20 credits (10 for the core fields), so the $49 plan buys about 125 full records.

Key features

• Search, collect and enrich endpoints for companies, plus employee and jobs APIs.
• Agentic Search API: plain-English queries turned into structured searches.
• Elasticsearch DSL for precise filters.
• Bulk datasets if you'd prefer to load everything into your own warehouse.

Pros and cons

• ✅ 7-day free trial with 2,000 credits, no card required
• ✅ Public prices for every tier, monthly or yearly (10% off)
• ✅ Job postings cost 1 credit per full record
• ❌ Full records cost 20 credits each, so the small plans run out fast
• ❌ Contact enrichment costs 10 credits per email found
• ❌ Credit rollover starts only at the $1,500 Premium plan

What users say

I couldn't find recent reviews to quote. G2 says its Coresignal listing "is no longer valid", and the Hacker News mentions I found come from people selling competing tools. If you're weighing it, the free trial is the fastest way to judge the data.

Pricing

• Free trial: 7 days, 2,000 credits
• Mini: $49 a month, 2,500 credits
• Starter: $199 a month, 12,000 credits
• Pro: $499 a month, 35,000 credits
• Growth: $1,000 a month, 150,000 credits
• Premium: $1,500 a month, 1,000,000 credits (Scale and Elite go up to $5,000 a month)

Yearly billing saves 10%. From the Coresignal pricing page and Company API page, checked November 4, 2026.

Bottom line

Pick Coresignal for volume: thousands of company or employee records with fields you'll analyze. Skip it if what you mainly need is emails and phone numbers for outreach.

4. Crustdata: Best for real-time company and people signals

What it does: People, company and job search and enrichment APIs, plus "watchers" that alert you when a person or company changes. Best for: Teams building AI agents or alerting tools that react to hiring, funding and job changes.

Crustdata prices its API for agents that make thousands of calls. Searching costs 0.03 credits per result and empty searches are free, so you can scan wide and pay more only for the records you keep. Its database covers 1B+ people and 60M+ companies, refreshed every 1 to 30 days, and a real-time tier that searches the web live starts at "four figures a month".

Key features

• Cheap search, paid enrichment: 0.03 credits per search result, 1 credit for a base person profile, 2 for a company.
• Watchers: alerts when a tracked person or company changes, from 0.5 credits per new result.
• 350+ filters across people, companies and jobs.
• Free calls: autocomplete, company identify and batch status checks use no credits.

Pros and cons

• ✅ $20 in free credits for every new account
• ✅ Every response header shows the credits that call used
• ✅ Credit packs stay valid for 12 months
• ❌ Contact enrichment (emails and phones) and live search are Enterprise only
• ❌ The pricing page shows no dollar price per credit for self-serve packs
• ❌ Real-time API access starts at four figures a month

What users say

Crustdata has no reviews on G2 yet. The most specific comment I found is from a founder launching a competing tool on Hacker News, so read it with that in mind: "Builder here, I was using Crustdata and IcyPeas and kept running into two problems: the per-lookup cost adds up fast, and the data is often 6–9 months stale." (Hacker News, March 2026)

Pricing

• Free: $20 in credits for every new account
• In-DB API: self-serve credit packs (search 0.03 credits per result, person enrichment 1 to 4 credits)
• Real-time API and Enterprise: from four figures a month (sales call)

From the Crustdata pricing page, checked November 4, 2026.

Bottom line

Pick Crustdata if your product needs to know when a company hires, raises money or changes, and you'll call the API thousands of times. Skip it if you need verified emails on a self-serve budget.

5. Explorium: Best for AI agents that need business data through MCP

What it does: B2B company and prospect data with enrichments and event signals, through a REST API and an MCP server. Best for: Developers building AI sales agents in Claude, ChatGPT or their own stack.

Explorium sells one-time credit packs, starting at $29.99 for 500 credits, with no subscription. The same credits work on the REST API and the MCP server, and the MCP server has an estimate-cost tool that tells you what an operation will cost before you run it. Its developer docs list 16 business enrichments and 3 prospect enrichments, each available as a quick call or a batch job.

Key features

• MCP server next to the REST API, drawing on one credit pool.
• Cost preview: estimate-cost and show-sample before you pay for an export.
• Events: business and prospect event signals next to enrichment.
• Async jobs for large runs.

Pros and cons

• ✅ Free trial with 100 credits, valid for 90 days
• ✅ Packs don't renew automatically
• ✅ Credit cost visible before each paid operation
• ❌ Credits per operation vary by dataset and field, so budgeting takes a test run
• ❌ Paid credits expire after 12 months and packs are non-refundable
• ❌ Volume discounts and higher rate limits are Enterprise only

What users say

G2 shows Explorium at 4.6/5 from 28 reviews (G2), but the review text wasn't visible to me without an account, so I have no quote to share yet.

Pricing

From Explorium's pricing page (its Markdown version, last updated August 26, 2026), checked November 4, 2026.

Bottom line

Pick Explorium if you're wiring business data into an AI agent and want to see costs before you spend. Skip it if you'd prefer a flat monthly fee you can forecast.

6. Hunter: Best for email and domain enrichment on a budget

What it does: Email finding and verification, plus person and company enrichment endpoints, sold as a sales platform or as an API-only Data Platform. Best for: Small teams and developers whose input is a domain or an email address.

Hunter is one of the simplest ways to turn a domain into email addresses through an API, and you don't need a subscription. Its Data Platform sells API-only credits: 1,000 search credits for $50 and 1,000 verifications for $11, valid for 12 months. The enrichment endpoints return a person profile from an email, a company profile from a domain, or both from one email.

Key features

• Domain Search and Email Finder: 1 credit per email found, nothing if it finds none.
• Email Verifier: 0.5 credit per verified address.
• Person, company and combined enrichment endpoints at up to 15 requests a second.
• Company search (Discover) through the API at no credit cost.

Pros and cons

• ✅ Free plan with 50 credits a month
• ✅ API-only credit packs, with no subscription needed
• ✅ Unlimited team members on every plan
• ❌ Coverage is thinner for small and new companies, per reviewers
• ❌ Bulk use gets expensive, per reviewers
• ❌ Credits on monthly plans reset each month and don't roll over

What users say

"It can get expensive for bulk use, there are some data gaps depending on the industry, and CRM integrations are a little lacking." (Austin A., G2)

Pricing

• Free: $0, 50 credits a month
• Starter: $49 a month, or $34 a month billed yearly, 2,000 credits a month
• Growth: $149 a month, or $104 a month billed yearly, 10,000 credits a month
• Scale: $299 a month, or $209 a month billed yearly, 25,000 credits a month
• Data Platform (API only): 1,000 search credits for $50, 1,000 verification credits for $11

From the Hunter pricing page and API docs, checked November 4, 2026.

Bottom line

Pick Hunter if your input is a list of domains and you want emails plus basic person and company fields at a low price. Skip it if you need direct dials or deep company data.

7. Lusha: Best for phone and email enrichment for sales teams

What it does: A B2B contact database with verified emails and phone numbers, used through a Chrome extension, CRM integrations and an API. Best for: Sales teams who need phone numbers for named prospects, pushed into the CRM.

Lusha is built around phone numbers for reps who call. A phone number costs 5 credits and an email 1. Full API access starts on the Pro plan at $52.45 a month billed yearly; Free and Starter accounts can call the API, but with strict rate limits.

Key features

• Person enrichment and prospecting endpoints, plus signals and webhooks on Pro.
• Native connectors for HubSpot, Salesforce and n8n.
• Bulk enrichment from Starter and CSV enrichment from Pro.
• Credit rollover of monthly credits, up to twice the monthly cap, on Pro and Premium.

Pros and cons

• ✅ Free plan with 40 credits a month and no card
• ✅ Phone numbers for 5 credits each
• ✅ 2 free seats on Pro and 5 on Premium
• ❌ Full API access needs Pro or higher
• ❌ Reviewers report thinner coverage outside large companies and some regions
• ❌ G2's review summary says around 15 to 20% of contacts are wrong or missing details (42 mentions)

What users say

"I use Lusha mostly for finding customer data, especially phone numbers and email addresses, and it does a really good job at that." (Anil K., G2). The same reviewer titled the review "Rich Data for APAC, But Lags in data richness for the USA".

From the critical side: "Enhancing their database in the EMEA region and expanding global coverage would be beneficial." (Prasad K., G2)

Pricing

• Free: $0, 40 credits a month, 1 seat
• Starter: $37.45 a month billed yearly, 4,800 credits a year
• Pro: $52.45 a month billed yearly, 7,200 credits a year, API and webhooks
• Premium: $299.95 a month billed yearly, 40,800 credits a year, advanced API
• Scale: custom

Yearly billing saves 25%. Prices change with the credit slider; these are the figures at the page's default setting. From the Lusha pricing page, checked November 4, 2026.

Bottom line

Pick Lusha if your reps call prospects and you want phone numbers in the CRM. Skip it if you're enriching company records at volume.

8. ZoomInfo: Best for enterprise CRM enrichment

What it does: A large B2B contact and company database with intent signals, sold as sales, marketing and talent packages, with an Enterprise API. Best for: Enterprises with a RevOps team and a budget for an annual contract.

ZoomInfo's API has a buyer-friendly billing rule: search is free, and you spend 1 credit only when you enrich a record. That record then stays "under management" for 12 months, so re-enriching it or getting webhook updates costs nothing more. The standard API bundle allows 1,500 requests a minute.

Key features

• Free search, 1 credit per enriched record, with 12 months of free updates on that record.
• Webhooks for changes to records you already manage.
• Intent and signals on the Copilot Advanced and Enterprise plans.
• Bulk jobs with a free preview before you redeem records.

Pros and cons

• ✅ You pay only for records you enrich
• ✅ Contact data includes direct dials and mobile numbers
• ✅ A 12-month window for free re-enrichment
• ❌ No public prices: you fill out a form to get a quote
• ❌ Reviewers say contact data goes stale (148 mentions in G2's summary)
• ❌ Reviewers find it expensive for small teams (85 mentions)

What users say

"Limited credit points and sometimes outdated contact information." (Aryan T., G2)

A Hacker News commenter put it this way in November 2023, three years ago: "ZoomInfo is in the same general area on quality and the price per record is competitive, but they have historically required a high minimum annual spend and have a reputation for litigiousness." (Hacker News)

Pricing

Custom pricing (sales call). ZoomInfo's pricing page lists Professional, Copilot Advanced and Copilot Enterprise plans behind a form; the API credit rules come from its Enterprise API guide. Both checked November 4, 2026.

Bottom line

Pick ZoomInfo if you're an enterprise that wants one vendor for contacts, companies and intent, with API enrichment on top. Skip it if you want to start this week without a sales call.

9. PredictLeads: Best for hiring, news and tech signals

What it does: Company signal data (job openings, news events, technology detections and similar companies) through an API, webhooks or flat files. Best for: Teams that score accounts or trigger outreach on what a company is doing.

PredictLeads bills per request: one call can return up to 1,000 job openings or news events and still costs 1 credit. That makes it cheap for signal work. The first 100 calls each month are free, then it's $0.04 a credit with a $40 monthly minimum, falling to $0.002 above 500,000 calls.

Key features

• Job openings, news events and technology detections for each company.
• Followed companies: signals sent to your webhook, 1 to 10 credits per company a month.
• Discovery and similar-company endpoints, billed per company returned.
• Flat files with history back to 2015 on enterprise plans.

Pros and cons

• ✅ 100 free API calls a month
• ✅ Up to 1,000 records for 1 credit
• ✅ Reviewers praise fast, helpful support (11 mentions)
• ❌ No people or contact data
• ❌ A $40 monthly minimum once you pass the free tier
• ❌ Unused credits don't roll over

What users say

"Their data is as promised. High quality and well structured, covering many areas revolving around web intelligence." (Jose P., G2)

"The only downside is pricing, which can feel expensive and non-transparent." (verified reviewer, G2)

Pricing

• Free: 100 API calls a month
• 101 to 5,000 calls: $0.04 per credit, $40 minimum a month
• 5,001 to 10,000: $0.02 per credit
• 10,001 to 100,000: $0.01 per credit
• 100,001 to 500,000: $0.004 per credit
• 500,001 and up: $0.002 per credit

From the PredictLeads pricing page, checked November 4, 2026.

Bottom line

Pick PredictLeads if you want to know when a target company starts hiring or adopts a new tool. Skip it if you need people.

10. FullEnrich: Best for waterfall email and phone enrichment

What it does: Waterfall enrichment that checks 25+ data sources for a work email, mobile number or personal email, then verifies what it finds. Best for: Outbound teams and agencies who want several sources checked for each contact, by API, CSV or Clay.

FullEnrich charges only for data it finds and verifies: the pricing page headline is "Verified, Or It's Free." Work emails cost 1 credit, mobiles 10 and personal emails 3, and the Pro plan is $55 a month for 1,000 credits at the default setting. It has an API, an MCP server and integrations with HubSpot, Zapier, Make, n8n and Clay.

Key features

• Waterfall across 25+ sources for emails and phone numbers.
• Verification included, with catch-all and phone checks.
• Reverse email lookup: an email turned into a person and company profile for 1 credit.
• Credit rollover: 3 months on monthly plans, 12 on yearly.

Pros and cons

• ✅ 50 free credits to start, no card
• ✅ You pay only for found, verified data
• ✅ Unlimited users
• ❌ Mobiles cost 10 times more than emails
• ❌ Some reviewers report slow runs and empty results
• ❌ One reviewer says catch-all emails are charged with no way to turn that off

What users say

"The enrichment process can be quite slow at times, and there are many instances where it fails to find any data at all." (Afrah A., G2)

"Phone numbers are 10x more expensive than emails." (Domenic G., G2)

Pricing

• Free trial: 50 credits
• Pro: $55 a month billed monthly for 1,000 credits ($0.055 per credit) at the default slider setting; bigger packs lower the price per credit
• Enterprise: custom

From the FullEnrich pricing page, checked November 4, 2026.

Bottom line

Pick FullEnrich if you already know whom to contact and want the best odds of a working email or mobile. Skip it if you need company data or signals.

How to choose the right data enrichment API

Start with the input you have and the output you need. A list of domains, a CRM full of emails and a product sign-up form each point to different APIs, and database size comes second.

Choose People Data Labs if you: build a product and want person or company fields billed per match. Choose Apollo.io if you: run outbound in Apollo and want your CRM enriched from the same data. Choose Coresignal if you: need thousands of full company, employee or job records. Choose Crustdata if you: want alerts when tracked people or companies change. Choose Explorium if you: build AI agents and want an MCP server with cost previews. Choose Hunter if you: start from domains and need emails cheaply. Choose Lusha if you: need phone numbers for reps who call. Choose ZoomInfo if you: are an enterprise buying contacts, companies and intent from one vendor. Choose PredictLeads if you: trigger outreach on hiring, news or tech changes. Choose FullEnrich if you: want a waterfall across many sources to raise the find rate on emails and mobiles.

Where the data lands narrows it further. If the goal is filling HubSpot or Salesforce fields, look at CRM enrichment first, because a native integration can save you a custom API job. And if you sell to companies that use a specific tool, you need technographic data: PredictLeads returns technology detections, while contact-first APIs like Hunter and Lusha focus on people.

Skip an API entirely if you enrich fewer than a few hundred records a month. The web apps and CSV uploads of Apollo, Hunter or Lusha are faster for that, and you won't write any code.

Decide which companies need enrichment data before you pay per record

Every API on this list charges per record, per match or per call, so the cheapest lookup is the one you never send. Enrich a whole CRM export and you pay for companies you'll never sell to.

So decide which companies fit before you enrich, and ask only for the fields your next step needs: an email for a sequence, a phone number for a call block, a hiring signal for a trigger.

That first step is the one I built Openlead for. Describe your ideal customer in Openlead in a sentence, and it finds up to 25 companies that fit, with 1 to 3 relevant people at each and their profile links. It has no email addresses or phone numbers, so you then run only the companies that fit through the API you picked.

Final verdict

For most teams the choice comes down to two: People Data Labs if you're building on the data, Apollo.io if your sales team needs it in the CRM. Add PredictLeads or Crustdata when you want signals, and FullEnrich when the find rate on emails and mobiles is what holds you back.

Frequently asked questions