Telephone
Telephone: A focused API for international number validation, enrichment, and risk scoring. Ranked #18 of 25 in Phone Number Validation Software by our editors (7.5/10); pricing: 7-day trial; best for international risk-aware validation.
At a glance
- Editor score7.5 / 10
- Pricing7-day trial
- Best forInternational risk-aware validation
- Free planNo
- Paid from€24.99/mo
- Facts checked20 Sep 2026
Where it wins
- Validates phone numbers across more than 190 countries
- Detects fake, invalid, and disposable numbers
- Adds carrier, line-type, location, and risk data
Where it doesn't
- No free plan; ongoing access starts at €24.99 per month
- Only one published Pro tier limits plan choice
- Developer-focused API access may require technical implementation
Our verdict on Telephone
Telephone is a developer-focused phone number validation and verification service for teams that need to assess number quality during sign-up, checkout, contact-list cleaning, routing, or similar workflows. It provides real-time checks through a REST API and also supports bulk validation, making it suited to both individual lookups and larger data-processing tasks. Results can include validity, formatting, carrier, line type, country, region, city, timezone, and risk information.
Pricing is straightforward: the published plan is Pro at €24.99 per month, billed monthly. It includes phone number validation, carrier and line-type detection, location and geo data, risk scoring, coverage across 190+ countries, and a real-time API. A 7-day free trial is available, and there is no free plan. The product is therefore easier to evaluate than a paid-only service without a trial, but the single published tier offers limited plan flexibility for organizations with different volume or feature requirements.
Telephone’s strongest distinction is the combination of validation, enrichment, and risk signals in one focused service. It can identify mobile, landline, VoIP, and toll-free numbers, detect disposable numbers, return geographic data, and process numbers through single-number or bulk endpoints. That breadth fits international workflows where basic validity checks are not enough. It is less suitable for buyers seeking a broader communications platform, as the offering centers on phone-number data and API-based processing rather than a wider application ecosystem. Choose Telephone when international coverage and risk-aware validation matter more than plan variety or non-API tooling.
Your product? Our editors can test Telephone in depth and publish a review, labelled as paid · from $149/mo →
Telephone pricing
All 1 Telephone plans and prices →
Telephone fact sheet
| Free plan | No |
|---|---|
| Paid from | €24.99/mo |
| Validation modes | Not verified |
| Line type data | Yes |
| Carrier data | Yes |
| Reachability data | Yes |
| Bulk validation | Yes |
| Monthly lookup limit | Not verified |
| Free trial | 7 days |
| Deployment | Cloud |
| Platforms | Web |
| Compliance & security | SOC 2, GDPR |
| Support | Docs |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Pricing | 7-day trial (source) |
| Website | telephone.so |
| Facts checked | 20 Sep 2026 |
Alternatives to Telephone
- Neutrino Phone ValidateA budget-friendly API for high-volume phone validation and number enrichment.9.4
- Abstract Phone Validation APIA data-rich phone validation API with broad integrations and a free starting point.9.2
- VeriphoneA practical validator for API workflows, bulk CSV checks, and carrier data.9.0
See all Telephone alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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