DomainRadar · availability & intelligence

Domain availability & intelligence, at any scale

Check a million domains in a single request, pull parsed WHOIS data, and monitor the internet for registrations against your brand.

Bulk up to 1M 500K free checks/month WHOIS data & history Brand monitor AI name generator Private by default
job · bulk-availability
#a3f8e2
Resolving 500,000 domains 142,850 / 500,000
Bloom
102,852
DNS
27,141
RDAP
9,999
WHOIS
2,857
acme.com WHOIS taken
acme-labs.com RDAP taken
acmelabs.io DNS taken
acme-cloud.net Bloom free
acme-pay.com WHOIS taken
What it does

One pipeline, five capabilities

Who it's for

Built for teams that take domains seriously

Banks · Enterprises · Government

Brand protection

Detect phishing domains within seconds of certificate issuance. AI-powered content analysis confirms real threats and eliminates false alarms — before the attack page goes live.

Founders · Brand teams · Agencies

Startup naming

Describe your product, generate tens of thousands of name candidates with AI, check availability across TLDs, and register — all in one workflow.

Law enforcement · Legal teams · Investigators

Domain intelligence

Look up domain registration data, check WHOIS records, and access historical snapshots to trace ownership and build evidence trails.

Registrars · Hosting providers · SaaS platforms

Registrar integration

Embed bulk availability checks directly into your product via REST API. Up to 1,000,000 domains per request with streaming results.

SOC analysts · Threat intel · Incident response

Cybersecurity teams

Enrich alerts with domain registration data. Cross-reference WHOIS history to identify infrastructure patterns and track threat actor campaigns.

Investors · Brokers · Portfolio managers

Domain portfolio management

Monitor expiry dates, track WHOIS changes across your portfolio, and discover available domains at scale with the bulk availability pipeline.

our promise

Your lookups are yours alone

When you search for a domain, that query stays between you and us. We never share, sell, or act on your lookup data. If you find a name that's available, nobody will know — not from us.

principle 01

Zero data sharing

Your queries are never sold to registrars, brokers, or anyone else. We don't monetize your search behavior. Period.

principle 02

No front-running

We don't register domains you've searched for. We don't tip off anyone who might. Your discoveries stay yours.

principle 03

Encrypted end to end

All API traffic is encrypted in transit. Data at rest is encrypted using AWS-managed keys.

ai name generator

Find the .com that nobody else found.

In an era where every good .com feels taken, the AI generates tens of thousands of name candidates and multiplies them across your selected TLDs. Describe your product, pick your extensions, and let the pipeline find what's actually available.

  • Tens of thousands of name candidates from a single prompt
  • Multiply across .com, .io, .dev, .app and many more TLDs
  • Instant bulk availability check through the pipeline
Try the generator
ai name generator awaiting prompt
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cloudvault
swiftdrive
nebulasync
vaporbox
skykeep
.com.io.dev.app.co.ai
via bloom → dns
Pricing

AWS-style pricing. Pay only for what resolves

Every query flows through Bloom → DNS → RDAP → WHOIS and stops at the first definitive answer. You're billed for the method that actually resolved it — never the steps that came before. Volume discounts kick in automatically.

Free tier: 500,000 queries / month — allocated per method (see below)

Each query enters the pipeline and stops at the first method that gives a definitive answer. You pay only for the resolving method — intermediate inconclusive steps are never charged. The free tier is split per-method so a cascade into the expensive end can never accidentally burn the whole budget.

Bloom — Accepted without verification. Zero network, nanosecond response. ~0.000001% false positive rate. Eligible TLDs only.
First 400K / month Free
400,001 – 500K / month $0.03 / 1K
500,001 – 5M / month $0.02 / 1K
Over 5M / month $0.01 / 1K
DNS — Bloom was inconclusive or unavailable — DNS lookup confirmed availability or registration.
First 70K / month Free
70,001 – 500K / month $0.07 / 1K
500,001 – 5M / month $0.04 / 1K
Over 5M / month $0.025 / 1K
RDAP — DNS was inconclusive — RDAP gave the definitive answer with structured data.
First 25K / month Free
25,001 – 50K / month $0.20 / 1K
50,001 – 500K / month $0.14 / 1K
500,001 – 5M / month $0.08 / 1K
Over 5M / month $0.05 / 1K
WHOIS — RDAP unavailable — raw WHOIS lookup via TCP:43 gave the definitive answer.
First 5K / month Free
5,001 – 50K / month $0.40 / 1K
50,001 – 500K / month $0.28 / 1K
500,001 – 5M / month $0.16 / 1K
Over 5M / month $0.10 / 1K
Cost estimator
Bloom: 92,000 $3.26
DNS: 7,000 $0.70
RDAP: 900 $0.18
WHOIS: 100 $0.04
Estimated monthly cost $4.18
Common questions

Questions, answered

Quick answers to what teams ask us most about DomainRadar. Need something else? Email [email protected].

How does the pipeline pricing actually work?
Every check runs through a chain — cache → DNS → RDAP → WHOIS — and stops at the first stage that can give a definitive answer. You are billed only at the rate of the stage that answered, never for the steps that came before. So most queries resolve cheap and fast; only the genuinely ambiguous ones reach the expensive end of the pipe.
How big can a single bulk request be?
Designed for very large batches — you can send up to 1,000,000 domains in one request and stream the results back as the pipeline resolves them. No polling, no pagination, no orchestration code on your side. Lower default caps apply on the free tier; reach out if you need the limit raised.
How does the AI name generator work?
Describe your product, brand, audience, and tone. The generator (powered by OpenAI) returns thousands of name candidates, multiplies them across the TLDs you select, and pipes the whole list straight through the availability pipeline — so what you get back is already filtered to names that are actually free to register.
How does Brand Monitor catch lookalike domains?
It watches every SSL certificate published to the public Certificate Transparency logs (using the official Google CT log list) and alerts you the moment a certificate is issued for a domain that looks like yours — homoglyphs, typosquats, subdomain abuse, lookalike TLDs. Optional AI content analysis visits flagged domains, scores the risk, and filters out coincidental matches before they reach your inbox.
Are my lookups private?
Yes. Your queries are never sold to registrars, brokers, or anyone else. We do not register or tip off third parties about domains you search for. Results are encrypted in transit and at rest, processed in EU infrastructure under GDPR.
Are there rate limits?
Yes, sensible defaults so abuse cannot affect everyone. On single-domain checks: 600 per hour per organisation, 200 per user. On bulk jobs: 60 per hour per organisation, 20 per user. Each bulk job itself can still cover up to 1,000,000 domains, so this rarely constrains real workloads. Limits can be raised on paid tiers.
Quickstart

Check your first batch of domains in under five minutes

Get an API key, send a bulk request, watch the pipeline stream answers back. Brand monitor and name generator are one-click extensions of the same account.

About 5 min
  1. Generate an API key

    Open the API keys panel in the dashboard and create one. Keys are scoped to your organization and revocable at any time.

  2. Send a bulk check request

    POST your list of domains (up to 1,000,000 per request) to the bulk endpoint with your API key in the Authorization header. The pipeline runs cache → DNS → RDAP → WHOIS for each domain and stops at the first stage that can give a definitive answer — you pay only at that stage.

  3. Stream the results

    Responses stream as each domain resolves. No polling, no pagination, no orchestration code on your side. Use them inline, or save the batch in your account for later analysis.

  4. Enable Brand Monitor (optional)

    Add a watched word (your brand, a product name) in the dashboard. DomainRadar watches every SSL certificate published to public CT logs and emails you within seconds when a matching certificate is issued — optional AI content analysis scores the risk and filters out coincidences before they reach your inbox.

  5. Generate available names (optional)

    Use the AI name generator to brainstorm at scale — describe your product and tone, get thousands of name candidates, pipe them straight through the availability pipeline, register what is free.

Ready when you are

Check your first million domains today

Free tier includes 1,000,000 availability checks per month. No credit card required.

Pay as you go No annual lock-ins
No credit card Start building now
Setup in 60 seconds Create account and start querying
1M free checks/month No expiry, no tricks
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