Phone number validation tools compared by price

Which phone number validation tool should I use?

What it is

Email verification with a real SMTP mailbox check: each address comes back valid, risky or invalid with a reason. Includes an email finder on Pro and up.

Price per check

Starter $9/mo for 2,500 ($3.60 per 1,000); Pro $39/mo, 100,000 a month at full speed ($0.39 per 1,000 when used), then slower, never cut off. Business $99/mo with 300,000 at full speed; Agency $249/mo with 750,000 at full speed.

One-time packs

10,000 for $15 ($1.50 per 1,000); 25,000 for $29 ($1.16 per 1,000); 50,000 for $49 ($0.98 per 1,000); 100,000 for $79 ($0.79 per 1,000); 250,000 for $169 ($0.68 per 1,000). Credits never expire, run at standard speed, CSV verification only (no API or finder).

Free checks

First 100 email checks free with a Google sign-in, no card, once per account. Single checks on the free email checker need no account.

Billing

Monthly subscription, cancel anytime (yearly billing optional). One-time packs are listed above. Starter allowances reset monthly and do not roll over.

Speed today

One sending IP today, shared by every customer: about 13,000 mailbox checks a day in the standard lane. Bad syntax, dead domains and disposable addresses return at once; a list of 100,000 takes days, not hours, and each job shows its estimated finish time.

Catch-all handling

Catch-all (accept-all) addresses stay risky, never valid, and are graded higher, medium or lower likelihood with the reasons. Anything a mail server does not confirm is risky.

API and MCP

REST API on Pro, Business and Agency (Pro includes 10,000 calls a month, then $1.50 per 1,000). Remote MCP server with 6 tools for Claude, ChatGPT, Cursor and VS Code. No API on Starter.

Integrations

Connects to Instantly, Smartlead, HubSpot and Mailchimp by API key: verifies a campaign or list and tags each contact with its result. CSV in and out for any other tool.

Phone

Free phone format checks (country, type range). Live carrier and line-type lookups come with Pro + Phone at $49.99/mo (5,000 a month). It never says a number is in service.

What it does not do

No sending, warmup or inbox placement tests. No published accuracy benchmark against other verifiers. Catch-all domains, Yahoo and AOL cannot be confirmed, and Outlook.com and Hotmail mailboxes are not probed while Microsoft refuses checks from our server's network: all of these come back risky, never valid.

SimpleVerifier facts from our pricing page and product. Last updated October 31, 2026.

How we compared

We read each vendor's own pricing page on 19 October 2026. Where a vendor charges per request, we multiplied the published rate by 5,000; where it charges credits, we used its stated credits per live carrier lookup. We compared price and returned fields only, not accuracy, and left out vendors whose pages did not state a clear price for this volume.

Each tool in a few lines

1. 1. Numverify

   Best for: Low-volume API lookups on a budget

   • Carrier and line type on every plan, including the free one
   • Yearly Basic is $161.99
   • Watch out: A hard request cap per plan; 50,000 a month is $59.99

   Checked October 19, 2026: Numverify pricing

2. 2. Abstract API

   Best for: Developers who want location and timezone fields too

   • Returns carrier, line type, region, city and timezone
   • Bulk CSV upload on paid plans
   • Watch out: Messaging and risk fields need the Standard or Professional plans

   Checked October 19, 2026: Abstract API phone validation pricing

3. 3. Veriphone

   Best for: High volumes of standard validations

   • 1,000 free credits every month
   • A standard validation is 1 credit, so the $12.99 Starter covers 10,000 of them
   • Watch out: A live current-carrier lookup costs 10 credits, so 5,000 of them need the $39 plan

   Checked October 19, 2026: Veriphone pricing

4. 4. Twilio Lookup

   Best for: Teams already sending SMS or calls on Twilio

   • Basic formatting and validation has no per-request charge
   • Add-ons such as caller name, identity match and SMS pumping risk on the same API
   • Watch out: No dashboard upload for a list; it is an API

   Checked October 19, 2026: Twilio Lookup pricing

5. 5. SimpleVerifier(our tool)

   Best for: Teams that verify emails and phones on one bill

   • Email verification on the same bill: the first 100,000 checks a month at full speed, then slower, never cut off
   • Failed carrier lookups do not count against the 5,000
   • The free validator runs in your browser with no account
   • Watch out: The free tool reads the numbering plan only; it cannot tell whether a number is in service
   • Watch out: Costs more than phone-only APIs if you need no email verification

   Checked October 19, 2026: SimpleVerifier pricing

Common questions

What is the lowest-priced phone validation API for 5,000 lookups a month?

By published prices on 19 October 2026, Numverify Basic at $14.99 a month for 5,000 requests, then Abstract API Starter at $19. Both return carrier and line type.

Can I validate a phone number for free?

Yes, within limits. SimpleVerifier's phone number validator checks format, country and line-type range with no account and no cap. Twilio Lookup's formatting and validation has no per-request charge but needs a Twilio account. Numverify and Abstract give 100 requests and Veriphone 1,000 credits a month.

Does a valid phone number mean it is in service?

No. A format check says the number fits its country's numbering plan. Only a live carrier lookup shows which network a number is on now, and even that does not prove someone answers it.

Why doesn't SimpleVerifier rank first here?

Because the rule is price for phone lookups alone, and its route, Pro + Phone at $49.99 a month, also pays for email verification. If you only need phone lookups, a phone-only API such as Numverify or Abstract costs less.