If you're looking for the best data enrichment API, here's the short version: for modern API-first enrichment, I would look at NinjaPear, People Data Labs, and Clearbit/Breeze Intelligence first, then go narrower based on whether you care more about contact data, company data, or identity verification. The bigger surprise is that a lot of the old list still exists, but the market has shifted hard toward fresher data, easier self-serve onboarding, and better workflow fit.
I've used some and researched some of them so here are my thoughts: People Data Labs (PDL) one of the standard names in the industry. Their APIs are pretty solid for high volume needs. I'll say they fall short in terms of freshness as they update only monthly. The search filters are pretty basic compared to other providers.
What's worse than inaccurate data? Incomplete data.
Raw data lacks the depth and context necessary to be truly useful.
This is where data enrichment comes in to help fill the gaps.
What is data enrichment?
Data enrichment involves enhancing raw data by adding valuable information from external sources.
Imagine having a list of customer names and email addresses. Data enrichment can augment this list with details like job titles, company names, social media profiles, and other relevant information.
This enriched data offers a more complete view of your prospects/customers, allowing you to do much more in many different aspects.
Understanding APIs
To efficiently perform data enrichment, businesses often use APIs.
An API, or Application Programming Interface, is like a translator that allows different software applications to communicate with each other.
One system requests data or services from another system and receive a response, in a structured way.
How data enrichment APIs work
A data enrichment API is a specialized tool that adds external information to your existing datasets programmatically.
Instead of manually searching for and inputting additional data, these APIs automate the process.
For example, if you have a customer's name and email address, a data enrichment API can automatically retrieve and add their job title, company details, and social media profiles to your database.
It saves time, reduces manual entry errors, keeps information current, and handles large volumes of data efficiently.
Benefits of data enrichment APIs
Data enrichment APIs have a wide range of applications, including:
Improved customer insights
Enriched data helps create detailed customer profiles, enabling personalized marketing and enhanced customer experiences.
It augments existing customer information with additional data points such as demographic details, social media activity, and purchasing history, so you understand the customers' needs and preferences better.
This allows for more targeted marketing campaigns, higher customer satisfaction, and increased loyalty.
Enhanced lead scoring
Add context to leads for accurate scoring and prioritization.
Data enrichment APIs can provide additional information about potential leads, such as company size, industry, job role, and beyond.
This extra data helps sales and marketing teams prioritize high-value leads, focus their outreach, and increase conversion rates.
Enhanced lead scoring ensures your most promising leads receive the attention they deserve, improving overall sales efficiency.
Fraud detection
Enriched data can help identify suspicious patterns and behaviors, enhancing fraud detection mechanisms.
By integrating data from various sources, you gain a more complete view of transactions and user activities.
This makes it easier to spot anomalies and detect fraudulent activities early on.
For example, enriched data might reveal inconsistencies in billing addresses, unusual purchasing patterns, or mismatched user information, all of which can signal potential fraud.
Market research
Market trends and competitor activities are highlighted with data enrichment.
Research at scale often means analyzing hundreds or thousands of companies, websites, and public signals. That gets painful fast without a reliable API layer.
By aggregating data from different sources, companies can analyze market dynamics, customer behavior, and competitive landscapes.
This enriched data allows you to make informed strategic decisions, identify new market opportunities, and stay ahead of industry trends.
Fill your data gaps
Enrichment helps in filling gaps and correcting inaccuracies in datasets.
Over time, databases can become cluttered with incomplete or outdated information.
Data enrichment APIs can automatically update and validate data entries, ensuring that records are accurate and up-to-date. This helps you stay on top of competition and spot opportunities earlier.
Clean, enriched data is essential for making accurate forecasts, optimizing operations, and maintaining regulatory compliance.
Personalized customer experiences
Enriched data gives you the power to personalize customer experiences by tailoring products, services, and communications to individual preferences.
For example, a retail company can use enriched customer data to recommend products based on previous purchases and browsing behavior.
Similarly, financial institutions can offer personalized financial advice and product recommendations based on a customer's financial history and goals.
Improved targeting and segmentation
By understanding more about your audience, you can create precise customer segments and deliver relevant content to each group.
This leads to more effective marketing campaigns, higher engagement rates, and better ROI.
For instance, a travel agency can use enriched data to target customers who have shown interest in specific destinations or travel experiences.
Enhanced customer support
Enriched data can improve customer support by providing support agents with more complete customer information.
When a customer contacts support, agents can quickly access their purchase history, previous interactions, and preferences, allowing for faster and more effective resolution of issues.
Personalized support leads to higher customer satisfaction and loyalty.
Business intelligence and analytics
Data enrichment plays a crucial role in business intelligence and analytics by providing a more complete and accurate dataset for analysis.
With enriched data, you can uncover deeper insights, identify trends, and make data-driven decisions.
This can lead to improved operational efficiency, better resource allocation, and stronger strategic planning.
Investing and startup funding
Enriched data can significantly impact investing and startup funding by providing deeper insights into market trends, investment opportunities, and potential risks.
As an investor, you can use enriched data to identify high-potential ventures, understand the competitive landscape, and perform more thorough due diligence.
For startups, enriched data helps in understanding investor behavior, optimizing fundraising strategies, and identifying key growth areas.
Does one of those use cases appeal to you?
Whatever your use case might be, there are no shortcomings to having better data. It enhances business processes by providing that additional context and accuracy to your existing data.
Now, let's get into the 19 best data enrichment APIs that can help your business.
The 19 best data enrichment APIs
Since this list is rather long, I'll lead with a summarized comparison at the top before the detailed comparison below.
| API | Data Quality | Pricing | Ease of Use | API | Support | Avg. Score |
|---|---|---|---|---|---|---|
| NinjaPear | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐⭐ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | 4.4/5 |
| Proxycurl (sunset) | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | 4.2/5 |
| Clearbit / Breeze Intelligence | ⭐⭐⭐⭐☆ | ⭐⭐☆☆☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | 3.6/5 |
| ZoomInfo | ⭐⭐⭐⭐☆ | ⭐☆☆☆☆ | ⭐⭐⭐☆☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | 3.4/5 |
| People Data Labs | ⭐⭐⭐⭐☆ | ⭐⭐⭐☆☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | 3.8/5 |
| FullContact | ⭐⭐⭐☆☆ | ⭐⭐⭐☆☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | 3.8/5 |
| Pipl | ⭐⭐⭐⭐☆ | ⭐⭐☆☆☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | 3.6/5 |
| Demandbase | ⭐⭐⭐⭐☆ | ⭐⭐☆☆☆ | ⭐⭐⭐☆☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | 3.4/5 |
| Enrich | ⭐⭐⭐⭐☆ | ⭐⭐⭐☆☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐☆☆ | 3.8/5 |
| Datanyze | ⭐⭐⭐☆☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐☆☆ | ⭐⭐⭐☆☆ | 3.4/5 |
| Lusha | ⭐⭐⭐☆☆ | ⭐⭐☆☆☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐☆☆ | ⭐⭐⭐⭐☆ | 3.2/5 |
| Data Axle | ⭐⭐⭐☆☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐☆☆ | ⭐⭐⭐☆☆ | ⭐⭐⭐☆☆ | 3.2/5 |
| Coresignal | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | 4.0/5 |
| Snov.io | ⭐⭐⭐☆☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐☆☆ | ⭐⭐⭐☆☆ | 3.4/5 |
| LeadGenius | ⭐⭐⭐⭐☆ | ⭐⭐☆☆☆ | ⭐⭐⭐☆☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | 3.4/5 |
| Mattermark | ⭐⭐⭐☆☆ | ⭐⭐⭐☆☆ | ⭐⭐⭐☆☆ | ⭐⭐⭐☆☆ | ⭐⭐⭐☆☆ | 3.0/5 |
| Crunchbase | ⭐⭐⭐⭐☆ | ⭐⭐☆☆☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐☆☆ | 3.6/5 |
| HG Insights | ⭐⭐⭐⭐☆ | ⭐☆☆☆☆ | ⭐⭐⭐☆☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | 3.2/5 |
| Leadspace | ⭐⭐⭐⭐☆ | ⭐⭐☆☆☆ | ⭐⭐⭐☆☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | 3.4/5 |
| Melissa | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐☆☆ | ⭐⭐⭐⭐☆ | ⭐⭐⭐⭐☆ | 3.8/5 |
| API | Key Features | Best For |
|---|---|---|
| NinjaPear | Public-web person and company enrichment, work email finder, company details, employee count, customer/competitor data | Teams that want enrichment plus competitive context |
| Proxycurl (sunset) | Legacy people and company data, social profiles | Existing legacy users evaluating migration |
| Clearbit (Now Breeze Intelligence by HubSpot) | Company demographics, employee information, social profiles | B2B marketing and sales teams |
| ZoomInfo | Detailed company and contact information | Sales teams and lead generation |
| People Data Labs | Extensive profiles, recruiting software background | Startups |
| FullContact | Contact data with social media profiles, job titles, KYC | Identity verification and fraud detection |
| Pipl | KYC | Identity verification and fraud detection |
| Demandbase | Insights into companies and executives | Market intelligence and lead scoring |
| Enrich | Detailed people and company information | General enrichment |
| Datanyze | Contact information | Sales departments |
| Lusha | Contact data with phone numbers, email addresses, company info | Sales outreach and marketing teams |
| Data Axle (Formerly InfoGroup) | Business and consumer information | Business and consumer information |
| Coresignal | Professional and company data | Professional and company data enrichment |
| Snov.io | Information on companies and contacts | Lead generation and outreach efforts |
| LeadGenius | Up-to-date business information | General enrichment |
| Mattermark | Company data, growth signals, funding data | Identifying high-potential prospects |
| Crunchbase | Information on startups and companies | Market trends and potential partners or funding/investments |
| HG Insights | Technographic data | Technographic insights |
| Leadspace | Detailed information on companies and contacts | General enrichment, CRM enrichment |
| Melissa | Business and consumer information | Data quality and verification |
1. NinjaPear

NinjaPear is the new platform I would add to this list first.
And yes, quick context because it matters: the founder behind Proxycurl is now building NinjaPear. Proxycurl API has been sunset, and NinjaPear is where that work has gone next.
NinjaPear is not just another enrichment vendor. It does person and company enrichment, but it also layers in customer data, competitor data, company monitoring, work email finding, company logos, and employee counts.
That matters because a plain enrichment API gives you a better row in your CRM. A richer platform gives you a better decision.
Callout: Proxycurl API has been sunset. If you knew Proxycurl from the old version of this article, the newer platform to look at is NinjaPear.

NinjaPear Pros
- Public-web-based enrichment, not dependent on LinkedIn scraping
- Person profile, company profile, employee count, and work email finder in one place
- Adds customer and competitor intelligence, which most enrichment APIs do not
- 3-day free trial with 10 credits and no credit card required
- Pay-as-you-go, no monthly minimums
NinjaPear Cons
- Newer platform, so some buyers will still compare it against older incumbents on pure brand recognition
- If you only need one narrow field and nothing else, the broader platform may be more than you need
NinjaPear Pricing
NinjaPear offers a 3-day free trial with 10 credits included and no credit card required. Pricing is usage-based with no monthly minimums.
Best for
Teams that want a data enrichment API plus competitive context, not just one more static record.
2. Proxycurl

Proxycurl's homepage
Proxycurl was a B2B enrichment API that specialized in people and companies.
It provided a wide range of information, including job titles, company details, social media profiles, contact information, and beyond, which is why it was on this list in the first place.
But this section needs one very important update: Proxycurl API has been sunset. I'm keeping it here because a lot of people still search for it by name, and because the product genuinely mattered for this category. The founder behind Proxycurl is now working on NinjaPear.
How to enrich people with Proxycurl
Historically, enriching people could be as easy as querying the API, specifically the Person Profile Endpoint, with a cURL command, such as:
curl \
-G \
-H "Authorization: Bearer ${YOUR_API_KEY}" \
'https://nubela.co/proxycurl/api/v2/linkedin' \
--data-urlencode 'linkedin_profile_url=https://linkedin.com/in/johnrmarty/' \
--data-urlencode 'extra=include' \
--data-urlencode 'github_profile_id=include' \
--data-urlencode 'facebook_profile_id=include' \
--data-urlencode 'twitter_profile_id=include' \
--data-urlencode 'personal_contact_number=include' \
--data-urlencode 'personal_email=include' \
--data-urlencode 'inferred_salary=include' \
--data-urlencode 'skills=include' \
--data-urlencode 'use_cache=if-recent' \
--data-urlencode 'fallback_to_cache=on-error'
Which would enrich an individual with their LinkedIn profile URL, though X or Facebook could also be used.
Additionally, a social media profile URL wasn't the only possible method to enrich a person's profile. You could also use the Search API with a name or company, or use solely an email and beyond.
For all options, it was always best to take a look at the documentation.
How to enrich companies with Proxycurl
The only thing that changed there was the endpoint, which would be the Company Profile Endpoint instead.
Here's another example using cURL:
curl \
-G \
-H "Authorization: Bearer ${YOUR_API_KEY}" \
'https://nubela.co/proxycurl/api/linkedin/company' \
--data-urlencode 'url=https://www.linkedin.com/company/google/' \
--data-urlencode 'resolve_numeric_id=true' \
--data-urlencode 'categories=include' \
--data-urlencode 'funding_data=include' \
--data-urlencode 'exit_data=include' \
--data-urlencode 'acquisitions=include' \
--data-urlencode 'extra=include' \
--data-urlencode 'use_cache=if-recent' \
--data-urlencode 'fallback_to_cache=on-error'
Of course, like pulling person B2B data, there were also alternative ways to pull company data such as the Company Search Endpoint.
Proxycurl Pros
- Comprehensive data coverage for both individuals and companies
- An extensive amount of data was available
- Provided job-based data
- Provided contact information
- Could scrape in real time
- Competitive pricing
- Easy integration with existing systems
- Detailed and well-maintained documentation
Proxycurl Cons
- It would not cover every profile depending on the privacy settings of the individual being enriched
- The API has now been sunset
Proxycurl Pricing
Historically, Proxycurl offered a free trial with 10 free credits, plus pay-as-you-go and subscription plans that started at $49/month.
Best for
Legacy users researching older options, and anyone trying to understand where this category came from. For net-new buyers, I would start with NinjaPear instead.
Don't replace your team with an LLM - set up a simple enrichment pipeline and keep humans only for low-confidence rows. Verify identity and current practice first via NPI registry and state boards, then confirm location on Google Maps and Healthgrades/Doximity, add contacts from ZoomInfo or Clearbit, and auto-verify email, phone, and address with standard validators.
3. Clearbit (Now Breeze Intelligence for HubSpot)

Clearbit's homepage
Recently acquired by HubSpot, Clearbit's API provides insights into companies and individuals, focusing on firmographic and technographic data.
It's particularly useful for B2B marketing and sales teams looking to build complete customer profiles and improve targeting.
Clearbit Pros
- Extensive firmographic data
- Easy integration
Clearbit Cons
- Common complaints about data accuracy and freshness
- You'll have to go through their sales department
- Recently purchased by HubSpot, which may or may not fit your stack strategy
Clearbit Pricing
Unfortunately, Clearbit keeps their pricing locked behind a sales team. Many sources have historically claimed the service started at $99/month, but post-acquisition pricing is not very transparent now.
Best for
B2B marketing and sales teams.
4. ZoomInfo

ZoomInfo's homepage
ZoomInfo offers detailed company and contact information, making it a valuable resource for sales and lead generation.
Its API provides access to a vast database of business profiles, helping sales teams target and connect with the right contacts.
ZoomInfo Pros
- Extensive database of business contacts
- Detailed company profiles
- Advanced filtering options
- Very good at contact information
ZoomInfo Cons
- Complex pricing structure
- You'll have to go through their sales department
ZoomInfo Pricing
ZoomInfo offers custom pricing based on usage and specific needs. Sources have long claimed pricing can start around $14,995/year.
Best for
Sales teams and lead generation efforts.
5. People Data Labs

People Data Labs' homepage
People Data Labs’ API allows you to fill in gaps in your customer data using information you already have.
They advertise over 3.1 billion people profiles that can be searched, sourced, and used to augment your existing data.
People Data Labs Pros
- Good support
- Self-serve experience
- Strong fit for high-volume use cases
People Data Labs Cons
- Can be too reliant on data pulled from LinkedIn-style profile sources
- Freshness is a recurring complaint in the market
People Data Labs Pricing
PDL is free to use for up to 100 requests per month. Their Pro plan starts at $98/month for 350 requests per month plus email support. Their Enterprise plan is custom pricing and allows access to a tailored set of features.
Best for
Startups.
6. FullContact

FullContact's homepage
FullContact provides an extensive API for enriching contact data with social media profiles, job titles, company information, ID verification, and more.
However, I think it works best for general identity verification and KYC purposes.
FullContact Pros
- Extensive contact enrichment capabilities
- Easy-to-use API
- Strong customer support
FullContact Cons
- Higher cost for extensive usage
- Data accuracy varies
FullContact Pricing
FullContact offers a free tier that allows 100 enrichments. Their Pro plan starts at $99/month, with custom pricing available for larger needs.
Best for
Identity verification and KYC.
7. Pipl

Pipl's homepage
Pipl specializes in people data, providing an API that enriches your datasets with personal and professional information from various sources.
Like FullContact, I think it's particularly useful for identity verification and fraud detection.
Pipl Pros
- Comprehensive people data
- Strong focus on identity verification
- Easy integration
Pipl Cons
- Limited business data
- Higher cost
- High minimum spend
Pipl Pricing
Pipl offers custom pricing based on specific needs and usage. Their minimum spend is $500 per month and is all routed through their sales department.
Best for
Identity verification and fraud detection.
8. Demandbase

Demandbase's homepage
Demandbase offers data enrichment APIs that provide insights into people and companies.
It helps businesses improve their lead scoring, market segmentation, and sales strategies and has millions of data points.
Demandbase Pros
- Detailed company and executive data
- Excellent for market segmentation
- Strong integration options
Demandbase Cons
- Data accuracy can vary
- Higher cost
Demandbase Pricing and usage limits
Demandbase offers custom pricing based on usage and needs. Everything is routed through their sales department.
One thing for sure is that the cost differs depending on your team size. Many sources claim the cost for a team of 200 users can range from $18,100 to $31,700 annually. For a company with a headcount of 1,000, it can range from $58,500 to $108,600.
Best for
- Market intelligence and lead scoring.
9. Enrich

Enrich's homepage
Enrich is a data enrichment API that focuses on enriching people and companies.
It's a newcomer on the block, but it works quite well.
Enrich Pros
- Accurate people and company data
- Easy integration
- Self-service user experience
Enrich Cons
- Higher pricing
Enrich Pricing
Enrich offers 25 free monthly credits and then starts at $70 per month after that.
Best for
General enrichment.
10. Datanyze

Datanyze's homepage
Datanyze offers a data enrichment API that primarily focuses on enriching sales prospects with accurate contact information.
This information is of course most valuable for sales departments.
Datanyze Pros
- Good at contact information
- Useful for sales targeting
- Easy integration
Datanyze Cons
- Higher cost for extensive usage
- Pricing and usage limits
Datanyze Pricing
Datanyze offers a free trial for 90 days with 10 credits per month and plans start out at $29 per month after that.
Best for
Sales.
11. Lusha

Lusha's homepage
Lusha provides an API that enriches contact data with phone numbers, email addresses, company information, and more.
It's particularly useful for sales and marketing teams looking to improve their outreach efforts.
Lusha Pros
- Detailed contact information
- Easy integration
- Strong customer support
Lusha Cons
- Higher cost
- Data accuracy can vary
Lusha Pricing
For API access, unfortunately, Lusha keeps things locked down behind a sales team. It isn't included in their standard plans, only enterprise.
Best for
Sales outreach and marketing teams.
12. Data Axle (Formerly InfoGroup)

Data Axle's homepage
Data Axle offers a range of data enrichment APIs that provide detailed business and consumer information.
It helps businesses improve their data quality and gain deeper insights into their customers and prospects.
Data Axle Pros
- Extensive business and consumer data
- Easy integration
- Real-time updates
Data Axle Cons
- Data accuracy can vary
Data Axle Pricing
Data Axle offers a free trial and starts at $25 per month.
Best for
Business and consumer information.
13. Coresignal

Coresignal's homepage
Coresignal offers a data enrichment API that provides information on individuals and companies.
It provides a general enrichment experience.
Coresignal Pros
- Comprehensive person and company data
- Easy integration
Coresignal Cons
- Higher cost
- Data accuracy can vary
Coresignal Pricing
Coresignal has a 14-day free trial then starts at $49 per month.
Best for
General data enrichment.
14. Snov.io

Snov.io offers a data enrichment API that provides information on companies and contacts. It's definitely sales-focused.
Snov.io Pros
- Detailed lead information
- Easy integration
- Good user experience
Snov.io Cons
- Higher cost for extensive usage
- Data accuracy can vary
Snov.io Pricing
Snov.io offers a free tier with limited requests. Paid plans start at $30 per month.
Best for
Lead generation and outreach efforts.
15. LeadGenius

LeadGenius' homepage
LeadGenius provides up-to-date business information through its data enrichment API.
LeadGenius Pros
- Extensive business data
- Easy to integrate
LeadGenius Cons
- High cost
- Data accuracy can vary
LeadGenius Pricing
LeadGenius offers custom pricing based on usage and needs. A free trial is available, but they mostly route you through their sales department. LeadGenius is one of the more expensive options on this list.
Best for
General enrichment.
16. Mattermark

Mattermark's homepage
Mattermark offers a data enrichment API that provides information on companies and contact information.
Mattermark Pros
- Detailed company and contact data
- Easy integration
Mattermark Cons
- Higher cost
- Limited data available
Mattermark Pricing
Mattermark offers a free trial then starts at $99 per month.
Best for
Enriching companies, or finding contact information.
17. Crunchbase

Crunchbase's homepage
Crunchbase provides a data enrichment API that offers information on startups and companies.
Crunchbase Pros
- Extensive information on companies and startups
- Useful for market research
- Easy integration
Crunchbase Cons
- Higher cost
Crunchbase Pricing
While the Crunchbase API works quite well, it requires an Enterprise plan, which is routed through the sales department and can vary in pricing.
Best for
Company data, funding data, and market trends.
18. HG Insights

HG Insights' homepage
HG Insights offers a data enrichment API that provides technographic data, helping businesses understand the technology landscape of their prospects and customers.
HG Insights Pros
- Extensive technographic data
- Useful for sales targeting
- Easy integration
HG Insights Cons
- Higher cost
HG Insights Pricing
HG Insights offers custom pricing based on usage and needs, and everything is routed through their sales department. However, Vendr claims the price can reach up to around $350,000 at the highest.
Best for
Technographic insights.
19. Leadspace

Leadspace's homepage
Leadspace provides a data enrichment API that offers detailed information on companies and contacts.
Leadspace Pros
- Comprehensive data on companies and contacts
- Real-time updates
- Easy integration
Leadspace Cons
- Higher cost
- Data accuracy can vary
Leadspace Pricing
Leadspace offers custom pricing based on usage and needs, and everything is routed through their sales department.
Best for
General enrichment, CRM enrichment.
20. Melissa

Melissa's homepage
Melissa provides a data enrichment API that offers business and consumer information.
It helps businesses improve their data quality and ensure data accuracy through verification processes.
Melissa Pros
- Strong focus on data quality and verification
- Comprehensive data coverage
- Easy integration
Melissa Cons
- Higher cost
- Limited contact data
Melissa Pricing
Melissa uses a credit-based system and offers 1,000 credits upon creating your account and a pay-as-you-go system thereafter depending on your needs.
Best for
Data quality and verification.
Proof of concepts are great until production hits. What looked like 60% accuracy dropped to the 40s, taking months to clean data and regain 80-90% accuracy. Data quality is revealed in production, not just in POCs. https://t.co/g5CdOmN58v
— Docsie.io (@likalo_llc) Sun May 17 10:03:10 +0000 2026
The bottom line
Data enrichment APIs are still invaluable if your business runs on outbound, research, lead scoring, fraud prevention, or CRM hygiene.
But I would not pick a data enrichment API now the same way I would have a few years ago. I care more about freshness, API ergonomics, self-serve onboarding, and whether the product helps me act on the data after enrichment.
That is why this list needed an update.
Proxycurl belonged on the old version of this article, and I'm not going to pretend it didn't. But Proxycurl has been sunset. The newer platform to look at is NinjaPear, especially if you want enrichment plus company, customer, competitor, and monitoring data in one place.
If your use case is narrow, this list should help you pick the right specialist. If your use case is broader and you are tired of stitching five vendors together, start with NinjaPear and see if it fits how your team actually works.