Best Bulk WHOIS API Alternatives in 2026
The top Bulk WHOIS API alternatives are WhoisDataCenter, WhoisXML API WHOIS API and Whoxy: 15 WHOIS lookup tools our editors would look at instead of Bulk WHOIS API, in our ranking order.
Bulk WHOIS API: A focused API for structured WHOIS lookups, bulk processing, and asynchronous retrieval. Where it falls short: paid subscriptions start at $9.99 per month.
Switching from Bulk WHOIS API? For most whois lookup tools buyers the best Bulk WHOIS API alternative is WhoisDataCenter, built for investigators needing current and historical WHOIS. On a budget, RDAP API starts at $9/mo, against $9.99/mo for Bulk WHOIS API. WhoisFreaks WHOIS API offers the most monthly lookup limit (50000 /mo).
Why People Look for a Bulk WHOIS API Alternative
- Paid subscriptions start at $9.99 per month
- The 14-day trial is limited to 500 WHOIS requests
- Each monthly plan has a defined request allowance
- No free plan — 10 of the alternatives below have it
- Paid from $9.99/mo — RDAP API is $9/mo
Quick Picks by What You Need
- Best overallWhoisDataCenter9.4
Investigators needing current and historical WHOIS
Visit WhoisDataCenter - Lowest priceRDAP API8.2
Paid plans from $9/mo
Visit RDAP API - Best free optionWhoisDataCenter9.4
Has a free plan (Bulk WHOIS API has none)
Visit WhoisDataCenter - Most monthly lookup limitWhoisFreaks WHOIS API8.6
50000 /mo
Visit WhoisFreaks WHOIS API
All 15 Bulk WHOIS API Alternatives, Ranked
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
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Best forInvestigators needing current and historical WHOIS
- Better than Bulk WHOIS API:
- Free plan
- Editor score 9.4 vs 7.1
A broad WHOIS research service with useful free allowances and paid data products.
- Historical WHOIS
9.4/10★★★★★Try WhoisDataCenter -
Best forAPI users needing broad lookup and integrations
- Better than Bulk WHOIS API:
- Free plan
- Editor score 9.2 vs 7.1
A broad lookup API with RDAP, parsed data, integrations, and a free tier.
- Bulk lookup
- RDAP support
9.2/10★★★★★Visit WhoisXML API -
Best forLarge-scale WHOIS API and dataset buyers
- Better than Bulk WHOIS API:
- Editor score 9.0 vs 7.1
A pay-as-you-go WHOIS platform for high-volume lookups, history, reverse search, and datasets.
- Historical WHOIS
- Bulk lookup
- RDAP support
9.0/10★★★★☆Visit Whoxy -
Best forAPI users needing WHOIS plus domain intelligence
- Better than Bulk WHOIS API:
- Free plan
- Editor score 8.8 vs 7.1
A focused domain-intelligence API with a free tier and plans from $10/month.
8.8/10★★★★☆Visit WhoisJSON -
Best forHigh-volume WHOIS intelligence teams
- Better than Bulk WHOIS API:
- Monthly lookup limit: 50000 /mo vs 3000 /mo
- Editor score 8.6 vs 7.1
A broad WHOIS API for security, research, and domain intelligence at scale.
- Historical WHOIS
- Bulk lookup
- RDAP support
8.6/10★★★★☆Visit WhoisFreaks -
Best forTechnical users wanting open-source RDAP
- Better than Bulk WHOIS API:
- Free plan
- Editor score 8.4 vs 7.1
A flexible, open-source RDAP client for technical users who want control over queries and output.
- RDAP support
8.4/10★★★★☆Visit OpenRDAP -
Best forDevelopers needing a polished RDAP API
- Better than Bulk WHOIS API:
- Paid from: $9/mo vs $9.99/mo
- Monthly lookup limit: 30000 /mo vs 3000 /mo
- Editor score 8.2 vs 7.1
A developer-focused lookup API with normalized JSON, bulk requests, and broad lookup coverage.
- Bulk lookup
- RDAP support
8.2/10★★★★☆Visit RDAP API -
Best forTeams wanting web lookup plus an API
- Better than Bulk WHOIS API:
- Free plan
- Editor score 8.0 vs 7.1
A practical WHOIS and RDAP lookup service with web access, parsed results, exports, and APIs.
- RDAP support
8.0/10★★★★☆Visit ViewDNS -
Best forWHOIS users wanting reverse and DNS tools
- Better than Bulk WHOIS API:
- Free plan
- Editor score 7.9 vs 7.1
A broad WHOIS, DNS, reverse lookup, and API toolkit with free web access.
- RDAP support
7.9/10★★★★☆Visit ViewDNS.info -
Best forBroad-TLD WHOIS API integrations
- Better than Bulk WHOIS API:
- Free plan
- Monthly lookup limit: 5000 /mo vs 3000 /mo
- Editor score 7.8 vs 7.1
A broad-TLD WHOIS API with a free tier and paid automation options.
7.8/10★★★★☆Visit IP2WHOIS -
Best forFree Windows desktop WHOIS research
- Better than Bulk WHOIS API:
- Free plan
- Editor score 7.7 vs 7.1
A free Windows WHOIS tool for multi-domain research and export.
- Bulk lookup
7.7/10★★★★☆Visit NirSoft -
Best forFree authoritative domain and network lookups
- Better than Bulk WHOIS API:
- Free plan
- Editor score 7.6 vs 7.1
A focused, free lookup tool for current domain, IP network, and ASN registration data.
- RDAP support
7.6/10★★★★☆Visit ICANN Lookup -
Best forDevelopers wanting an open RDAP endpoint
- Better than Bulk WHOIS API:
- Editor score 7.4 vs 7.1
An open-source RDAP client with web access and a documented HTTP endpoint.
- RDAP support
7.4/10★★★★☆Visit RDAP.org -
Best forProfessional parsed WHOIS API coverage
- Better than Bulk WHOIS API:
- Monthly lookup limit: 40000 /mo vs 3000 /mo
- Editor score 7.2 vs 7.1
A parsed WHOIS API with broad TLD coverage and live access on higher tiers.
7.2/10★★★★☆Visit WhoAPI -
Best forAPI users focused on historical WHOIS retrieval
- Better than Bulk WHOIS API:
- Free plan
A focused API for retrieving historical WHOIS records with flexible query and output options.
- Historical WHOIS
7.0/10★★★★☆Visit WhoisXML API
Bulk WHOIS API Alternatives: Common Questions
What is the best alternative to Bulk WHOIS API?
WhoisDataCenter: #1 in our WHOIS Lookup Tools ranking, with an editor score of 9.4 out of 10. A broad WHOIS research service with useful free allowances and paid data products.
Is there a free alternative to Bulk WHOIS API?
Yes. WhoisDataCenter, WhoisXML API WHOIS API, WhoisJSON API, OpenRDAP and ViewDNS WHOIS Lookup have a free plan or a free tier (11 of the 15 alternatives on this page).
What is the cheapest paid alternative to Bulk WHOIS API?
Of the alternatives here that publish a price, RDAP API starts lowest, at $9/mo.
Why do people look for Bulk WHOIS API alternatives?
Paid subscriptions start at $9.99 per month; The 14-day trial is limited to 500 WHOIS requests; Each monthly plan has a defined request allowance.
Which Bulk WHOIS API alternative has the most monthly lookup limit?
WhoisFreaks WHOIS API, with 50000 /mo.
How do I switch from Bulk WHOIS API?
Export your data from Bulk WHOIS API (most tools have an export in their settings). Sign up for the alternative; start on its free plan or trial if it has one. Import your export and set up the integrations your team relies on. Run both side by side for a short while, then cancel Bulk WHOIS API.
How to Switch from Bulk WHOIS API
- Export your data from Bulk WHOIS API (most tools have an export in their settings).
- Sign up for the alternative; start on its free plan or trial if it has one.
- Import your export and set up the integrations your team relies on.
- Run both side by side for a short while, then cancel Bulk WHOIS API.
Bulk WHOIS API vs Each Alternative
| # | Tool | Free plan | Paid from | API access | Bulk lookup | RDAP support | Score |
|---|---|---|---|---|---|---|---|
| 15 | Bulk WHOIS API | No | $9.99/mo | Full | Yes | 7.1 | |
| 1 | WhoisDataCenter | Yes | Full | 9.4 | |||
| 2 | WhoisXML API WHOIS API | Yes | Full | Yes | Yes | 9.2 | |
| 3 | Whoxy | No | $10/unit one-time | Full | Yes | Yes | 9.0 |
| 4 | WhoisJSON API | Yes | $10/mo | 8.8 | |||
| 5 | WhoisFreaks WHOIS API | No | $63/mo | Full | Yes | Yes | 8.6 |
| 6 | OpenRDAP | Yes | Free | Full | Yes | 8.4 | |
| 7 | RDAP API | No | $9/mo | Full | Yes | Yes | 8.2 |
| 8 | ViewDNS WHOIS Lookup | Yes | Full | Yes | 8.0 | ||
| 9 | ViewDNS.info | Yes | Full | Yes | 7.9 | ||
| 10 | IP2Location.io IP2WHOIS | Yes | $49/mo | Full | No | 7.8 | |
| 11 | WhoisThisDomain | Yes | Free | None | Yes | 7.7 | |
| 12 | ICANN Lookup | Yes | Free | None | No | Yes | 7.6 |
| 13 | RDAP.org Lookup | Free | Full | Yes | 7.4 | ||
| 14 | WhoAPI | No | $52/mo | Full | No | 7.2 | |
| 15 | WhoisXML API WHOIS History API | Yes | Full | 7.0 |
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update