
Veriphone
RealPhoneValidation
Clearout Phone
Lookup by Twilio
IPQualityScore
Antideo
Twilio
Global phone number validation and lookup API

NovoPsych
Clinical assessment tools for psychologists, therapists and occupational therapists. Send measures by secure link and review scored results, severity bands and reports.

Which is more popular?
Based on our record, Numverify seems to be more popular. It has been mentioned 11 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | numverify.com | clientforms.app |
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In their own words, as submitted to SaaSHub.


NumVerify offers an extensive yet straightforward RESTful JSON API for a total of 232 countries around the world for domestic and international mobile number validation and information search. It is one of the reasonably priced API numbers. Additionally, it offers sophisticated capabilities like...
Clinical assessment tools for psychologists, therapists and occupational therapists. Send measures such as the PHQ-9, GAD-7 and DASS-21 by secure link and get scored results, severity bands and reports ready to review. The catalogue also includes DSM-5 ADHD assessments and autism screening tools....
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


No analysis of Numverify yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
How to Lookup Phone Number | Free Phone Number Verification API | numverify
No ClientForms.app videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Numverify and ClientForms.app.
ClientForms.app's answer:
Frontend: Next.js 15 (React 19), Tailwind CSS Backend: Supabase (PostgreSQL, Row-Level Security) Authentication: Clerk Payments: Stripe Hosting: Vercel (Sydney region) Database hosting: Supabase (Australian data residency)
ClientForms.app's answer:
Psychologists who assess ADHD and autism. Typically private practice, solo or small group (1-5 clinicians), currently using paper forms and spending hours on admin per assessment. They want something that works and is secure.
ClientForms.app's answer:
Neurodivergent-first design. Most digital forms just replicate paper online. ClientForms is built specifically for ADHD and autism patients - progress bars with time remaining (helps with time blindness), softer colours instead of harsh white, sticky headers so you always know where you are. The forms are designed to reduce anxiety and improve completion rates.
ClientForms.app's answer:
Most clinical software treats patients as an afterthought. ClientForms is designed specifically for neurodivergent users who are filling out the forms, progress indicators, time estimates, calmer colours, predictable layouts. One link, no signup required, works on any device. Patients just open and complete.
Share your experience with using Numverify and ClientForms.app. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


Overview: Numverify provides global phone number validation with extensive coverage of countries and carrier detection. Its real-time validation ensures businesses only process legitimate numbers. - Source: dev.to / over 1 year ago
Phone number carrier lookup APIs are indispensable tools for SaaS platforms, telecom providers, and application developers aiming to optimize call routing and security. By integrating these APIs, businesses can improve customer... - Source: dev.to / almost 2 years ago
Numverify — Global phone number validation and lookup JSON API. 250 API requests/month. - Source: dev.to / about 4 years ago
Tracking ClientForms.app since Dec 2025.
When comparing Numverify and ClientForms.app, you can also consider the following products.

Phone number validation API: line type, carrier and formats for 243 countries. Clean CSV lists and Google Sheets in one upload. 1,000 free lookups a month.
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NovoPsych is a tool that is used for outcome monitoring via conducting psychological tests online.
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Realtime API and Batch Phone Validation
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Phone Number Validation - Accuracy Guaranteed, GDPR Compliant, Abuse Phone Number Checker, Real-Time API 99.999% Uptime - Free Trial With 100 Credits!
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Know the details behind every phone number
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IPQualityScore (IPQS) proactively prevents fraud without disrupting the user experience. Access leading fraud prevention tools to detect bots, emulators, VPNs, proxies, stolen user data, and fake users.
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