11 Best Company Name to Domain APIs Tested (2026)

Here’s a problem that sounds tiny but wrecks whole workflows: you have a list of company NAMES, and you need their websites. “Acme Corporation” in a cell, and no clue if it’s acme.com, acme.io, or getacme.com.

I hit this wall with a 4,000-row event list once. I started Googling each company by hand. About forty rows in, I did the math on how long that would take and nearly cried. Then I found company name to domain APIs, and the job went from two days to two minutes.

So let me save you the tears. This is my tested rundown of 11 options, how I scored them, and how to pick the one that won’t hand you the wrong domain.

📌 TL;DR: There's no single winner here, there are three. For turning a big list of company names into clean, verified domains, Company URL Finder goes furthest (yes, it's ours, judge the specifics below). If your team lives inside HubSpot, Clearbit is the natural fit. And if you want the tech stack behind each official domain, BuiltWith is the one. Match the API to your job, not to a ranking.

One honest observation from running name lists through these tools: the accuracy gap barely shows on clean names. It shows on the messy ones. “ACME, Inc.,” “acme gmbh,” and a typo’d “Acme Corportion” are where cheap lookups quietly fall apart. That’s why messy-input handling gets its own score in my table.

What Is a Company Name to Domain API?

A company name to domain API is a service your software calls with a company name to get back the official domain. You send “Acme Corp,” it returns acme.com. That’s the whole job in one line, and the API wrapper just makes it repeatable at scale.

Under the hood, it’s a focused kind of Data Enrichment. The API runs Data Matching to resolve a messy human-typed name into a real, verified domain name. The better ones return extras with it: employee count, industry, revenue range, sometimes the tech stack.

Why does the domain matter this much? Because it’s the join key of B2B data. Once you hold the official domain, email patterns, firmographics, and WHOIS records all connect to the same company record. If you want the deeper mechanics, I’ve written a plain-English piece on what an enrichment API is.

Why the Wrong Domain Is the Real Risk

The real risk isn’t a missing domain, it’s a confidently wrong one. A blank cell is honest. A wrong domain name poisons every step that follows it, silently.

And wrong answers come in predictable shapes. I see five again and again:

• Lookalike domains. The fan site, the reseller, or the squatter ranks above the official website.
• Parent and child companies. You asked for the subsidiary, the API returns the parent’s domain. Or the reverse.
• Rebrands. The company changed names, and the old domain now redirects. Some APIs return the stale one.
• Franchises and branches. “McDonald’s Texas” isn’t a company. A good API should resolve it to the corporate domain, not a local landing page.
• Same name, different country. Two unrelated firms share a name. Without a country hint, the API has to guess.

So when you compare tools, don’t just ask “did it find a domain?” Ask “did it find the RIGHT official domain for the company I meant?” That distinction drives everything below.

What Makes a Good Name to Domain API?

A good name to domain API gets the official website right even when the input name is ugly. Everything else is secondary. Here’s the checklist I actually use:

• Match accuracy. The real domain, not a lookalike. Test on YOUR names, never the vendor’s demo.
• Messy-input handling. Real lists hold “Acme Corp,” “ACME, Inc.,” and “acme.” Good APIs use fuzzy matching (approximate string comparison) to resolve all three to one company. I’ve broken down how that works in my guide to fuzzy matching company names.
• Batch support and rate limits. One-at-a-time calls suit a signup form. A 10,000-row cleanup needs a batch endpoint and a rate limit (the per-second request cap) that won’t choke your script.
• Null handling. No API has full coverage. You need to know what a no-match looks like in the JSON, and whether you’re charged for it.
• Extra data. Some return just the domain. Some return the whole company profile. Know which you need before you pay for the bigger one.
• Pricing shape. Per-lookup credits, monthly buckets, or flat plans. The shape matters more than the sticker price at scale.

How We Tested and Scored

I scored all 11 APIs against seven weighted pillars. Match accuracy 25%, messy-input handling 15%, batch and rate limits 15%, pricing shape 15%, extra data returned 10%, docs and integration 10%, compliance and data sourcing 10%.

The method, stated honestly: I ran sample name lists hands-on where free access allowed, and reviewed public documentation for the rest. The scores are my editorial judgment against those pillars, not a lab benchmark. Vendors change plans and limits often. So treat my table as a shortlist, then re-test the finalists on 100 of your own company names. Full disclosure: Company URL Finder is our product, and I’ve flagged that in its card too.

The 11 APIs at a Glance

Short on time? This table maps each API to the job it fits best. The detailed cards follow.

API	Core focus	Returns	Best for
Company URL Finder	Name-to-domain resolution	Official domain + company profile	Big name lists, clean domains fast
Clearbit (HubSpot)	Enrichment suite	Domain + firmographics	Teams inside HubSpot
99Finder	Simple lookups	Domain	Light, no-frills resolution
MarcomRobot	Marketing data ops	Domain + enrichment fields	Campaign data workflows
WhoAPI	Domain intelligence	Domain + WHOIS data	Registration-level detail
Clearout	Email verification	Domain + verification	Lookups plus email checks
EnrichmentAPI	Developer enrichment	Domain + company data	Developer-first builds
MatchKraft	Bulk name matching	Domain matches at scale	Messy list cleanup
BuiltWith	Technology profiling	Domain + tech stack	Technographic targeting
UpLead	Prospecting platform	Domain + contacts	Lead workflows
RiteKit	Brand and logo data	Domain + brand assets	Logo and brand needs

The 11 Best Company Name to Domain APIs, Reviewed

Same shape for every card: what it is, who it fits, and the honest downside. Because every tool here has one, including ours.

1. Company URL Finder

Built for exactly this one job: company name in, verified official domain out. Disclosure first: this is our product, so judge the specifics, not my enthusiasm.

Best for: converting big name lists into clean domains without a heavy platform around it. It handles messy input well, supports bulk runs, and returns company details alongside the domain so you skip the second call. Free lookups are available with no credit card required, which makes the accuracy easy to test on your own data.

Honest downside: it’s a focused resolver, not a full sales platform. You won’t get contact-level prospecting or intent data here. Pricing shape: free tier, then credit-based plans.

2. Clearbit

Now part of HubSpot, Clearbit made the name to domain lookup famous. Its enrichment pedigree shows: strong firmographics come back with the domain.

Best for: teams already living inside the HubSpot ecosystem who want enrichment baked into their CRM records rather than bolted on.

Honest downside: since the HubSpot acquisition, standalone access has narrowed, and the best experience assumes you’re a HubSpot customer. Pricing shape: bundled with HubSpot tiers rather than a simple standalone plan.

3. 99Finder

A lookup-focused option for teams that want straightforward name to domain resolution without a platform wrapped around it. Simple in, simple out.

Best for: light workloads where you need the domain and nothing else, and you’d rather not learn a bigger product to get it.

Honest downside: thin extras. If you later need firmographics or contacts, you’ll be adding a second tool. Pricing shape: lookup-based credits.

4. MarcomRobot

MarcomRobot leans toward marketing data operations, so domain resolution sits next to list hygiene and campaign tooling instead of living alone.

Best for: marketing ops teams that want name to domain conversion inside a broader data-cleanup workflow.

Honest downside: it’s a data-ops product first, so pure developers may find the API surface less central than on developer-first rivals. Pricing shape: credit bundles.

5. WhoAPI

WhoAPI comes from the domain-data world, with WHOIS and registration records in its DNA. It treats the domain itself as the product.

Best for: cases where you care about registration details, expiry, and ownership signals, not just which official website belongs to which company name.

Honest downside: it’s domain intelligence first, company matching second. Messy company-name input isn’t its home turf. Pricing shape: plan tiers by request volume.

6. Clearout

Known first for email verification, Clearout also offers company lookups. That pairing is the point: find the domain, then verify the addresses you build on it.

Best for: outbound teams that want domain finding and email verification under one roof and one invoice.

Honest downside: the name to domain feature is a supporting act, not the headline, so expect verification to get the product attention. Pricing shape: credit-based.

7. EnrichmentAPI

As the name says, it’s built around enrichment, with name to domain as one of its endpoints. The developer experience is the pitch: clear docs, predictable JSON.

Best for: engineers who want to wire domain resolution into their own product or pipeline and value clean documentation.

Honest downside: less brand recognition than the big names, so you’ll want to run your own accuracy sample before committing. Pricing shape: metered API credits.

8. MatchKraft

MatchKraft focuses specifically on matching company names to domains at scale. Messy input is its specialty, which is exactly the problem most real lists have.

Best for: bulk cleanup jobs where thousands of inconsistent, human-typed names need to resolve to one domain each.

Honest downside: it’s a matching engine, not an enrichment suite. Beyond the domain, you get little extra company data. Pricing shape: volume-based.

9. BuiltWith

Famous for technology profiling, BuiltWith answers a different question: not just which domain, but what’s running on it. CMS, analytics, payment stack, all of it.

Best for: technographic targeting, like building a list of every company on a specific ecommerce platform, with its company-to-URL endpoint feeding the pipeline.

Honest downside: you’re paying for tech intelligence. As a pure name resolver it’s overkill, and messy names aren’t its focus. Pricing shape: subscription tiers.

10. UpLead

UpLead is a prospecting platform with company data and enrichment inside. Domain lookups arrive as part of a bigger lead-generation workflow.

Best for: sales teams that want the domain, the firmographics, and the contact list in the same product.

Honest downside: if all you need is name to domain conversion, a full prospecting platform is a lot of product (and cost) for one field. Pricing shape: seat plus credit plans.

11. RiteKit

RiteKit comes from the social and brand-data space, and its company lookups reflect that. Domains arrive alongside logos and brand assets.

Best for: product teams that want to auto-populate a workspace with a company’s logo and identity, with the domain as the anchor.

Honest downside: B2B data depth is limited. It’s a brand-data tool that resolves domains, not a data vendor. Pricing shape: API credit packs.

How the 11 APIs Score

Here’s the scored view, using the weighted pillars from the method section. Reminder: these are editorial scores from hands-on runs and documentation review, and Company URL Finder is ours, so read its row with that in mind.

API	Accuracy	Messy input	Batch	Pricing	Extras	Docs	Compliance	Total /10
Company URL Finder	9	9	9	8	8	8	8	8.6
Clearbit (HubSpot)	9	8	7	6	9	9	8	8.0
EnrichmentAPI	8	7	8	7	7	8	6	7.4
MatchKraft	8	9	8	7	4	6	6	7.2
UpLead	8	6	7	6	8	7	8	7.2
Clearout	7	6	8	7	6	7	7	6.9
BuiltWith	7	5	8	5	9	8	7	6.9
WhoAPI	7	5	7	7	7	8	7	6.8
MarcomRobot	7	6	7	7	6	6	7	6.7
99Finder	7	6	7	8	5	6	6	6.6
RiteKit	6	5	7	7	7	7	6	6.4

Chain Two Providers and Plan for the No-Match

What do pros do when one API isn’t enough? They chain two. It’s called waterfall enrichment: send every name to your primary API, catch the no-match rows, and send only those misses to a second provider.

Because no single database covers every company, the waterfall lifts your overall match rate without doubling your bill. You pay the second provider only for the hard cases. Three rules make it work:

• Handle nulls in code. A no-match should route to the fallback, not crash the run or write an empty cell.
• Check the no-match billing. Some vendors charge for every request, some only for successful matches. Ask before you build.
• Respect confidence scores. If the API returns one, set a threshold. Auto-accepting low-confidence matches re-imports the wrong-domain problem you’re paying to avoid.

💡 Waterfall tip: Order your chain by accuracy, not by price. Let the most precise API answer first, and use the cheaper one only as the safety net for its misses. A cheap first pass that's wrong half the time defeats the whole design.

How to Choose by Situation

Still torn? Pick by your actual job, not by the scores alone.

• A big one-time list. Company URL Finder or MatchKraft, and follow my bulk name-to-URL workflow so you convert the whole file in one pass.
• Ongoing CRM enrichment. Clearbit inside HubSpot, or Company URL Finder plus your CRM’s import tools if you’re elsewhere.
• You want more than the domain. UpLead for contacts, BuiltWith for tech stacks, WhoAPI for registration data.
• You’re writing code today. EnrichmentAPI or Company URL Finder. And if you want a working script fast, my tutorial shows how to call one in Python, from API key to enriched CSV.

My 4,000-Row Lesson

Back to that event list, because the ending matters. The API turned 4,000 company names into domains in minutes, and I felt like a genius. Then about a dozen wrong domains surfaced over the next month.

A German manufacturer resolved to a US firm with the same name. Two subsidiaries came back with their parent’s domain. Every one of those rows produced bounced outreach and wasted verification credits before we caught it. Not a disaster. But annoying, and avoidable.

So now I never onboard an API without a 100-name sample test: pull 100 real names from my own data, run them through two finalists, and count correct official domains by hand. Twenty minutes of counting has settled every tool debate I’ve had since.

How We Know This

Two things shape this review. We build and operate one of these APIs, so we see the messy-name problem from the inside. And we run customer name lists through resolution pipelines every week, which keeps the failure modes fresh.

The limits: this review reflects August 2026. Vendors change free tiers, rate limits, and pricing shapes without notice. Verify current terms on each vendor’s site before you commit, and weigh our own product’s row against our obvious interest in it.

The payoff for getting this right is real, though. Clean domains feed every downstream Data Quality win you’re chasing. Gartner’s research puts the cost of poor data quality at an average of $12.9 million a year for organizations, and Salesforce’s State of Sales research found reps spend only about 28% of their week actually selling. Bad domains feed both problems. A good resolver quietly shrinks them.

Frequently Asked Questions

What does a company name to domain API do?

It takes a business name and returns that company’s official website domain. Most also return extra details like revenue range, employee count, and industry, so one lookup gives you a usable company profile.

How accurate are these APIs?

Accuracy varies widely between providers, and the only number that matters is the one you measure. Test 100 real company names from your own data and count the correct domains before you commit.

Can they handle messy or abbreviated company names?

The good ones can. Strong APIs use fuzzy matching to resolve variations like “Acme Corp,” “ACME, Inc.,” and “acme” to the same official domain. This is the first thing worth testing.

Why is the domain so important in B2B data?

Because the domain is the join key. Once you have it, email patterns, firmographics, WHOIS records, and tech data all connect to one record. A wrong domain corrupts every step that follows.

Can I enrich a whole list at once?

Yes, if the API offers a batch endpoint. For thousands of names, batch processing beats one-at-a-time calls on both speed and cost. Confirm batch support and rate limits before you build.

Do I need a developer to use one?

For a direct API integration, usually yes. But many providers offer bulk CSV uploads or no-code connectors, so you can convert a name list into domains without writing any code.

Is there a free company name to domain API?

Yes. Several tools on this list, including Company URL Finder, offer free lookups with no credit card required. Free tiers cap volume, but they’re enough to run a proper accuracy sample.

Can I call a company name to domain API in Python or JavaScript?

Yes. These are standard REST APIs returning JSON, so any language with an HTTP client works. A basic script sends the name, reads the domain field, and writes it back to your file.

Are there open-source or GitHub options for name-to-domain lookups?

There are open-source scripts on GitHub that guess or scrape domains from names. They’re fine for rough drafts, but they lack verification, maintenance, and support, so match quality is usually well below a dedicated API.

What is a good match rate to expect?

A good match rate is one your own sample confirms, because it depends on your list’s quality and region mix. Clean, well-known company names resolve at much higher rates than misspelled or international ones.

References

• Gartner, on the average annual cost of poor data quality: gartner.com
• Salesforce, State of Sales research on how reps spend their week: salesforce.com
• IANA Root Zone Database, the authoritative list of top-level domains: iana.org
• Wikipedia, background on APIs, domain names, and WHOIS
• ICO, guidance on UK GDPR and lawful use of business contact data: ico.org.uk

🧠 Before you buy: Don't pick from any list, including this one. Take 100 of your real company names, run them through two or three finalists, and count the correct official domains by hand. The winner is whichever nails YOUR data, not whichever has the loudest homepage.

So there’s your shortlist. Pick two or three, throw your real names at them, and let the match rate decide. That one test will save you from a wrong-domain mess three months from now. Go find those websites. You got this.