Work in progress. We haven't benchmarked most of these providers yet, so most plans have no Overall score.

Datacircle

Best GTM APIs

Datacircle lists all the GTM APIs

Datacircle

Cached phone validation API plans

Name: Cached phone validation API plans
Creator: Datacircle
License: https://creativecommons.org/licenses/by/4.0/

Fields explainedCSV JSON zip

	A	B	C	D	E	F	G	H	I	J	K	L	M	N	O	P	Q	R	S	T	U	V	W	X	Y	Z	AA	AB	AC	AD	AE	AF	AG	AH	AI	AJ	AK	AL	AM	AN	AO	AP	AQ	AR	AS	AT	AU	AV	AW
1	API	Score						Price			Not found	Numbers judged					Time per number						The phone validation call		Aggregators	Charges				Overage	In their words	Data			Plan				Rate limit				Speed	The call			About the plan		Sources
2	API plan	Overall score	Price score	Data score	Cost to get started score	Bundle score	Performance score	$ per 1,000	Billing	$ a month	$ per 1,000	Called	Real, said valid	Fictional, said invalid	Wrong	Unsure	Median	10th percentile	90th percentile	Fastest	Slowest	Baseline	Call	Charged per number	Aggregators	Repeat free	Per	Extra fields	Also pays for	$ per 1,000	Their pitch	Freshness	Keep data	Use data	Pay	You get	Enough for	Expires	Per day	Per second	Concurrent	Batch	Median	You send	Method	Path	Plan	Who can get it	Read from
	Cached phone validation · 13 plans
3	Abstract API, $19 monthly, Starter, 5,000 requests / month	55.7	21	86	85	0	100	$3.80	monthly	$19	$3.80	20 of 20	13 of 13	5 of 7	2 of 20	0 of 20	0.05 s	0.04 s	0.10 s	0.00 s	0.20 s	0.29 s	GET phoneintelligence.abstractapi.com/v1/	$0.0038	Orthogonal: paid $5.00	never	call		nothing else		Check any phone number in real time. The Phone Validation API tells you if a number is real, which carrier and line type it uses, and where it's registered.	1 day	no limit, but no collection, database or directory compiled from it without Abstract's written permission	You may not access or use the Site for any purpose other than that for which we make the Site available. Without limiting the foregoing, you agree not to: [...] 3. Use the Site or the Content to advertise or offer to sell goods and services or to identify any household, street address, or individual. 4. License, sell, resell, lease, distribute, or otherwise commercially exploit as a standalone product, or make available to any third party, the Site, or any Content not owned by you (unless the Content is expressly licensed to you for such purpose). [...] 13. Use the Site or the Content to spam, phish, pharm, pretext, spider, crawl, or scrape. [...] 17. Use the Site or the Content for any illegal or unauthorized purpose. 18. Use the Site or the Content: for any form of debt collection, as the sole source of data for hard background check purposes, to determine eligibility for a government license or benefit, for any purpose prohibited by applicable data privacy and security laws, for the benefit of any one political candidate, political party, political campaign, or political advocacy group affiliated exclusively with or formed to benefit any one of the foregoing, [...] in connection with any purpose covered by the Fair Credit Reporting Act (15 U.S.C. Sec. 1681 et seq (“FCRA”)) [...], for the preparation of a Consumer Report or in such a manner that may cause such data to be characterized as a Consumer Report, in connection with establishing a consumer’s eligibility for credit or insurance to be used primarily for personal, family, or household purposes [...], for the purpose of evaluating a consumer for employment, promotion, reassignment, or retention as an employee, for any tenancy verification or in connection with any application to rent real property, [...] for any other purpose under the FCRA.	$19	5,000 requests a month	5,000 calls a month			3		1	0.05 s	phone. Optional: country	GET	/v1/	Starter, 5,000 requests / month	anyone 18 or older
4	Botoi, $9 monthly	0.0	81	0	90	50	N/A	$0.03	monthly	$9		20 of 20	11 of 13	0 of 7	9 of 20	0 of 20	Nothing to time	Nothing to time	Nothing to time	Nothing to time	Nothing to time	Nothing to time	POST api.botoi.com/v1/phone	$0.00003	none		call		from the same budget: All 150+ endpoints		Parses and validates a phone number. Returns formatted versions (E.164, national), country code, and country name.	stored	no limit	By obtaining and using an API key, You agree to: Keep Your API key confidential and not share it with unauthorized parties, Not exceed the rate limits associated with Your plan tier, Not use the API for any unlawful purpose or to transmit harmful content, Not attempt to circumvent authentication, rate limiting, or other security measures, Not resell or redistribute API access without prior written consent from the Company	$9	10,000 requests a day	10,000 calls a day	resets daily at midnight UTC	10,000	0.5		1		phone. Optional: country	POST	/v1/phone	Starter	anyone 18 or older
5	Neutrino API, pay as you go	0.0	78	0	100	0	N/A	$0.08	pay as you go			20 of 20	13 of 13	1 of 7	6 of 20	0 of 20	Nothing to time	Nothing to time	Nothing to time	Nothing to time	Nothing to time	Nothing to time	GET neutrinoapi.net/phone-validate	$0.00008	none		call		nothing else		Parse, validate and get location information about a phone number.	stored	no limit	The user may create derivative products using our APIs including the data returned from our APIs with the exception of 4.2 below. [...] The user may not distribute, resell or transfer bulk API data to anyone other than the Licensee. Bulk API data is any data returned from any API which includes more than one single data record. [...] as well as any bulk data obtained by storing API response data on your own systems. [...] The user may not embed our APIs into client-side (e.g. JavaScript), desktop or mobile software without the protection of a server-side process or strong encryption. [...] The user may not allow anyone other than Licensee, Licensee’s employees, Licensee’s contractors or Licensee’s vendors to access our APIs or data without the suppliers express written permission.	monthly					500	250	1		number. Optional: country-code, ip	GET	/phone-validate	On-Demand	anyone paying by Visa, Mastercard or SWIFT
6	Strale, top-up from €10	0.0	8	0	92	50	N/A	$22.506	pay first			9 of 20	8 of 8	0 of 1	1 of 9	0 of 9	Nothing to time	Nothing to time	Nothing to time	Nothing to time	Nothing to time	Nothing to time	POST api.strale.io/v1/do, capability phone-validate	$0.0225	none		call		from the same budget: every capability and solution		Validate a phone number and classify its type. Returns E.164 format, country, carrier name, and whether it is mobile, landline, or VOIP. Covers 200+ countries.	stored	no limit	You agree not to use the Service to: break the law, evade sanctions, or facilitate fraud, process personal data of EU/UK data subjects without an appropriate lawful basis, circumvent rate limits, quotas, or the Service’s authentication, resell the Service as your own or build a competing product whose primary purpose is to mirror Strale’s capability catalog, scrape or systematically extract Strale’s own metadata (capability descriptions, test results, pricing) outside of the documented public endpoints, use AI-assisted capability outputs as the sole basis for decisions with legal or significant effects on a person without human review [...] You retain all rights to the data you send to the Service and to the structured responses you receive.	€10					10		1		capability_slug, inputs.phone_number. Optional: country_code, max_price_cents, require_fresh, dry_run	POST	/v1/do	Prepaid wallet	anyone

7	APILayer, $129.99 monthly	N/A	65	N/A	71	50	N/A	$0.52	monthly	$129.99	$0.52														none	never	call		from the same budget: /countries	$2.08	Capture only good leads, keep your user database clean and fight fraud by validating phone numbers at the point of entry into your system	stored	You shall not: [...] use, store, or access any numverify API Data & Services, or the numverify API after the termination of this Agreement, You do not permit Your end users to store [...] numverify API Data & Services for any other purposes	You are hereby permitted to receive, process, and display numverify API Data & Services to individual end-users of your application(s), provided such end users use numverify API Data & Services strictly for their own personal use, You do not permit Your end users to store, distribute, or otherwise exploit numverify API Data & Services for any other purposes. [...] You are permitted solely to use numverify API Data & Services for reference by Your end users. Except as expressly provided herein, under no circumstances whatsoever may You transfer or permit the transfer of numverify API Data & Services outside of your application(s). [...] You shall not: reproduce, copy, modify, distribute, market, display, transfer, sublicense, assign, prepare derivative work(s) or adaptation(s) based on, sell, exchange, barter or transfer, rent, lease, loan, time-share, resell, or in any other manner exploit numverify API Data & Services or the numverify API, make access to numverify API Data & Services or the numverify API available to unauthorized parties, or otherwise post or distribute numverify API Data & Services in any public forum including, but not limited to, print, newsletters, radio, television, or internet, [...] use or permit others to use, market, distribute, or export numverify API Data & Services, or the numverify API, or, use numverify API Data & Services or the numverify API in any manner or for any purpose that violates any law, regulation or right of any person. [...] You also agree not to: [...] redistribute any Information And Content in any manner whatsoever [...] to any person, organization, corporation or other entity, including within your own organization or externally, except for the limited Permitted Uses, [...] present, archive, cache, frame, scrape, or mirror any Information And Content from any part of the Services within another web site, except with express written permission [...], [...] embed or import any data provided in, on or through the Services into any information services (whether or not web-based), data files, or application software, including without limitation accounting and payroll systems, except as specifically permitted in writing by apilayer.	$129.99	250,000 requests a month	250,000 calls a month	not carried over from one monthly period to the next				1		number. Optional: country_code	GET	/validate	Enterprise Plan	anyone
8	APIVerve, $299.99 monthly	N/A	74	N/A	65	67	N/A	$0.75	monthly	$299.99	$0.00														none		call		from the same budget: Email Validator · every other APIVerve API		Validate phone numbers, see line type and carrier, and flag disposable lines.	stored	You must not use the API [...] to cache, store, or redistribute Output beyond what the Documentation permits	Free plan: "Attribution required", "Non-commercial use", paid plans: "Commercial license", "No attribution required" (pricing page). Terms: "You must not use the API to build a product that materially replicates or competes with the Product itself, to exceed or evade quotas, or to cache, store, or redistribute Output beyond what the Documentation permits." [...] "you agree not to use the Products to violate any law, infringe any right, harm any person, transmit malicious code, harvest data unlawfully, circumvent security or usage limits, disrupt or overload our infrastructure, or resell or redistribute raw Product access in a manner the Product is not sold for."	$299.99	4,000,000 credits a month	400,000 calls a month	credits reset each billing cycle, no rollover			50	1	0.35 s	number. Optional: country	GET	/v1/phonenumbervalidator	Mega	anyone 13 or over (under 18 only with the permission of a parent or legal guardian)
9	BigDataCloud, $9.95 monthly, Bronze, GET /data/phone-number-validate	N/A	53	N/A	90	67	N/A	$0.995	monthly	$9.95															none		call		from the same budget: Phone Number Validation by IP Address API · Email Address Verification API	$0.995	Phone numbers are entered in countless formats — local, international, with or without country codes, with spaces, dashes, or brackets. This API normalises and validates them against the E.164 international standard, so you always know what you're working with.	stored	no limit	Whenever you use our Services in any capacity you agree that you will not use them: in any manner prohibited by these terms and conditions or any other policy or set of restrictions published on our Website, for any unlawful purpose, at a frequency or in a way that is likely to make the system inaccessible to third parties, or for the purpose of creating, developing, refining or otherwise supporting a product or service that competes with our business, without our prior written permission [...] You may not at any time download, scrape or reverse engineer our services, API or Website.	$9.95	10,000 requests a month	10,000 calls a month				no limit	1		nothing required. Optional: number, countryCode, localityLanguage	GET	/data/phone-number-validate	Bronze	anyone with an account, giving true and complete information about themselves, their business and their contact details
10	Melissa, $40 pack, 10,000 Credits, GET /V4/WEB/GlobalPhone/doGlobalPhone	N/A	3	N/A	83	92	N/A	$40.00	pay first																none		call		from the same budget: Personator · Property Data · BusinessCoder · Global Address Check · Global Name Check · Basic Email Check · Mailbox Email Check · Global IP Locator · Melissa Lookups · Listware · Mailers Online		With only a phone number and/or a country entered, Melissa Global Phone can determine whether the phone number is accurate and callable for the region and identify the country of origin from the international access code.	stored	as the separate written agreement or license for its APIs sets, which isn't public	as the separate written agreement or license for its APIs sets, which isn't public. Its site terms (“These Terms govern the Site only.”) list what you agree not to do: “You agree not to, and not to permit or enable any third party to: [...] use the Site, any Site content, or any output of a Site demonstration, lookup, sample, or trial to develop, train, fine-tune, benchmark, or improve any machine learning model or artificial intelligence system, or any product or service that competes with Melissa, use any Site lookup, demonstration, sample, free trial, or API key for any purpose other than evaluating Melissa products for your own use, or exceed any usage limit that Melissa publishes or communicates to you, ”	$40	10,000 credits	1,000 calls	the whole balance resets to 0 after a year with no use or purchase		5		1		phone. Optional: ctry, ctryOrg, opt (CallerID, DefaultCallingCode, PreferDialingCode, TimeToWait, VerifyPhone), t	GET	/V4/WEB/GlobalPhone/doGlobalPhone	10,000 Credits	anyone
11	NumLookupAPI, $179.99 monthly, scale 500k, POST /v1/validate	N/A	75	N/A	69	50	N/A	$0.36	monthly	$179.99	$0.36														none		result		from the same budget: Validate Phone Number		Send a phone number in any format and get back whether it is valid, its E.164, national and international formats, its country, carrier and line type.	stored	no limit	The Application and its services must be used lawfully and for their intended purposes [...] Users may not use content for purposes outside normal service usage. This includes prohibiting copying, sharing, editing, sublicensing, or selling content, unless explicitly allowed [...] Users may not reproduce or resell the service unless given prior written approval by the Owner.	$179.99	500,000 requests a month	500,000 results a month	at the end of each month			no limit	100		numbers. Optional: country_code	POST	/v1/validate	scale 500k	anyone
12	RealValidito, $500 pack	N/A	45	N/A	65	50	N/A	$1.00	pay first		$1.00														none		result		from the same budget: Phone + DNC Lookup (POST /lookups/validate, 1 phone credit and 1 DNC credit a number)		Instantly check if a US or Canada phone number is valid and active — with carrier, line type, and location details included.	1 day	no limit	We grant you a limited, non-exclusive, non-transferable, revocable license to access and use our services for your own internal business purposes only. You may not: Resell, sublicense, or redistribute our data or services to third parties, except as expressly permitted in writing by REALVALIDITO, Use our data to build a competing service or product, Reverse engineer, decompile, or attempt to extract our source code or data sources, Use automated scraping, harvesting, or bulk extraction beyond your authorized API access, Re-purpose or redistribute validated data in any form. [...] You agree to use the Services only for lawful purposes and in compliance with all applicable laws, including the Telephone Consumer Protection Act, the FTC’s Telemarketing Sales Rule, state telemarketing and Do Not Call laws, and privacy laws.	$500	500,000 credits	500,000 results	never				1,000		numbers	POST	/phonelookup/validate	500,000 phone lookup credits	anyone
13	Trestle, top-up from $10	N/A	11	N/A	83	83	N/A	$15.00	pay first		$15.00														Clay: your key no Data Credits, 1 Action per call (Actions start at less than $0.01 each), paid, no fixed price · Databar: your key 0 credits a call on the Build or Scale plan, paid $49.50 · Deepline: paid $21.00 per 1,000 results · treg: your key free, paid $15.00	never	call	litigator risk: +$5.00	from the same budget: Real Contact API · Address Validation API · Reverse Phone API · Reverse Address API · Caller Identification API		Validate phone numbers worldwide, determine carrier name, line type, and prepaid status, and identify disconnected phone numbers with a phone activity score. Our international coverage ensures accurate and reliable phone data across global markets.	stored	for the duration of this Agreement	Customer is authorized to use the Trestle Data for identity verification, lead verification, identity management, caller identification, routing, prioritization use cases, to scrub lists for outbound dialing, and/or for any additional use case(s) expressly set forth on the applicable Order. Customer will not, and shall ensure its Affiliates and Users do not: (a) use the Trestle Data for marketing purposes except to respond to an inbound request, (b) use the Trestle Data in violation of any applicable laws, rules, or regulations or in violation of any third-party right, (c) store or otherwise use the Trestle Data for purposes other than the internal business purposes of the Customer, as contemplated in the applicable Order or Customer Agreement, (d) use the Trestle Data in conjunction with activities prohibited by law, (e) store or cache the Trestle to avoid making additional Queries to the Services, (f) merge stored Trestle Data with other data unless it is coded or tagged to indicate Trestle as its source, or (g) use the Trestle Data for file download in a fixed page format (i.e., create a printable, downloadable directory of personal information). [...] Customer will not: (a) make any Services or Trestle Data available to anyone other than Customer, its Affiliates, and their respective Users, (b) use the Services or Trestle Data for the benefit of anyone other than Customer or its Affiliates, (c) resell, distribute, or otherwise disclose or make available the Services or Trestle Data [...] without the prior written consent of Trestle [...] (h) use the Services or Trestle Data to build a competitive product or service [...] Customer may not use the Services or Trestle Data in connection with any FCRA purpose	$10	$10	about 666 calls	after one year if not used		10		1		phone. Optional: phone.country_hint, add_ons, source_id	GET	/3.0/phone_intel	Self-Serve, pay as you go	companies, with a business email address
14	Veriphone, $249 monthly	N/A	89	N/A	67	50	N/A	$0.249	monthly	$249	$0.00														none		call	original carrier, original line type, current carrier, current line type, current MCC-MNC, original MCC-MNC, ported, carrier data source: +$2.241	from the same budget: Bulk Phone Number Validation		Validate any phone number and identify its carrier, line type, and country — in bulk via CSV or instant API.	stored	no limit	any	$249	1,000,000 credits a month	1,000,000 calls a month	at the monthly reset, no rollover				1		phone. Optional: mode, default_country, record	GET	/v3/verify	Enterprise	anyone
15	World Text, £11.25 pack	N/A	0	N/A	90	75	N/A		pay first																none				from the same budget: HLR Lookup · MNP Lookup · Send SMS		Validate numbers and lookup networks via HTTP.	stored	no limit: its terms set none and say “You retain all rights and ownership of Data. We do not claim any ownership rights in Data.” (“Data”: “Account Information, Content, Personal Data and any other information made available to us in connection with the use of the Services”)	“a limited, non-exclusive, non-transferable, non-sublicenseable right to (i) use the applicable Services, (ii) integrate the Services in your Application in order to access the Service, if applicable, and (iii) offer and make available to Service Users the Services solely, or, as integrated into your Application, all in accordance with the Agreement”, “You will not (and will not allow Service Users) to: (i) reverse engineer, decompile, copy or disassemble the Services, (ii) market, sell (subject to Section 1 (c)), sublicense, rent, lease, or otherwise distribute the Services, in whole or in part, [...]”, “You agree that you will not, and will not encourage or permit any party (including but not limited to Service Users) to, access or use the Services: (a) other than as expressly prescribed by the Agreement, (b) in violation of: (i) Compliance Rules or Relevant Laws or (ii) applicable third party licenses, (c) to send spam or unsolicited messages or other communications, [...] (h) to gather, store, upload or otherwise transmit any Data for which you do not have a right to do so, [...]”	£11.25	2,000 credits						1		msisdn	GET	/hlr/info	2,000 credits	anyone who creates an account (“Create Account” on its pricing page), the account “must be enabled for HLR lookups”
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63	Abstract API, free
64	APILayer, free
65	APIVerve, free
66	BigDataCloud, free, Base, GET /data/phone-number-validate
67	BigDataCloud, free, Base, GET /data/phone-number-validate-by-ip
68	Botoi, free
69	Melissa, free, Monthly Top-off, GET /V4/WEB/GlobalPhone/doGlobalPhone
70	Melissa, free, Monthly Top-off, POST /V4/WEB/GlobalPhone/doGlobalPhone
71	Neutrino API, free
72	NumLookupAPI, free, Free, POST /v1/validate
73	NumLookupAPI, free, Free, GET /v1/validate/{number}
74	RealValidito, free
75	Strale, free
76	Trestle, free
77	Veriphone, free

Datacircle lists all the GTM APIs

Best GTM APIs

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We add each plan's price, data, cost to get started, bundle and performance scores at their weights and scale the total to 100. Data and performance come from our benchmark, so until we benchmark the provider they are N/A, and so is the plan's overall score. A plan whose data score is 0 has an overall score of 0, whatever its other scores. Point at any score to see how we scored it. Move a weight to rank the plans by the new scores.

Price40

Price › $ per 1,000
Not found › $ per 1,000

Data40

Numbers judged

Our benchmark of the provider's call. N/A on a call we haven't benchmarked. Each API's sheet shows what we measured on each benchmarked plan, in the columns after its price.

Cost to get started10

About the plan › Who can get it
Price › Billing
Plan › Pay
Price › $ per 1,000

On a pay as you go plan, the price of one result. On a tier that starts after a set number of monthly calls, the cost of those first calls.

Bundle10

Charges › Also pays for

Performance10

Time per number › Median

Our benchmark of the provider's call. N/A on a call we haven't benchmarked. Each API's sheet shows what we measured on each benchmarked plan, in the columns after its price.