Postio pricing: phone validation API
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GET / Postio's only call for this APIAbout this item
- Live. Postio checks the phone number you send when you call the API.
- 7 of the 9 key fields we check. Number, Formats, Validity, Type, Carrier, Porting and roaming, Place.
- Nothing to pay. You get 100 requests.
- One call. You send
numbertoGET /. The call returns whether the number is valid.phone/ {number} - Anyone can get it. Keep data: no limit. Use data: with conditions.
Postio: phone validation API alternatives
Postio alternatives: every phone validation API provider ranked
The table starts with Postio's cheapest paid plan. Next come plans from other providers with the price per 1,000 phones closest to Postio's. Each plan in the table gives live data.
| Postio, top-up from £10 | 1Lookup, $7,990 yearly, Professional (annual), POST /bulk/jobs, Create a bulk job (type hlr_lookup) | HLR Lookup, £2,500 pack, 1,000,000 lookups, POST /batches/{id}/sourcejson, Bulk uploads via API, full | PhoneVerify, top-up, Volume 10k-50k numbers | Listar, top-up from €100,000, Diamond, POST /search/verify-whatsapp | |
|---|---|---|---|---|---|
| $ per 1,000 phones | $13.335 | $13.317 | $13.335 | $13.335 | $13.504 |
| Completeness | 78% | 67% | 89% | 33% | 22% |
| Billing | pay first | yearly | pay first | pay first | pay first |
| Pay | £10 | $7,990 | £2,500 | any amount | €100,000 |
| Enough for | as many as you pay for | 50,000 results a month | 250,000 results | as many as you pay for | about 8,333,333 results |
| Freshness | live | live | live | live | live |
| Who can get it | anyone | anyone with a business name and a working business email address | anyone | anyone | anyone whose cumulative spend on credits has reached €100,000 excl. tax |
Sources
From each provider's own pricing page and docs, and from what providers tell us. We read this row from these pages on 2026-11-03.
Product details
The key fields this plan's answer can hold, then each filled column in its row on the sheet.
- Number
- Formats
- Validity
- Type
- Carrier
- Porting and roaming
- Place
- Risk, not in the answer
- Owner, not in the answer
| $ per 1,000 phones | $0.00 |
|---|---|
| Per | call |
| Billing | free |
| Aggregators | none |
|---|
| $ per 1,000 | $0.00 |
|---|
| Their pitch | Postio phone validation parses and formats a number, then runs a live HLR carrier lookup — so you learn not just whether a number is well-formed but which carrier holds it now, whether it has been ported, and whether it is reachable. |
|---|
| Freshness | live |
|---|---|
| Countries | Worldwide |
| What it checks | numbering plan, carrier, line in service |
| Keep data | no limit |
| Use data | Don't use the API for fraud, spam targeting, stalking, harassment, or anything that breaks UK law. Because the address service uses Royal Mail PAF data, you must also keep to the PAF End User Terms — in particular, don't copy, extract, resell, republish or publicly display PAF data except as those terms allow, don't use it to build a competing product, and don't try to reverse-engineer the underlying data files. Don't use automated means to scrape or bulk-harvest responses beyond your purchased lookups. |
| Pay | $0 |
|---|---|
| You get | 100 requests |
| Enough for | 100 calls |
| Per second | 30 |
|---|---|
| Batch | 1 |
| Answer | in the call |
|---|
| You send | number |
|---|---|
| Method | GET |
| Path | /phone/{number} |
| Plan | 100 free lookups |
|---|---|
| Who can get it | anyone |
The 22 fields the plan's answer can hold
success, number, valid number, possible number, line type, country code, country name, national format number, international format number, E.164 number, original carrier, current carrier, ported, reachable, MCC, MNC, lookup level, lookup error, result count, request ID, worker time, lookup time