Compare
Private phone number services compared: everything, without the catch
SMS rental sites, second-number apps and business VoIP each get part of it right. Here is the whole picture — based on the public offers of the main services in each category.
Comparison table
| Feature |  Numonym | SMS rental sites | Second-number apps | Business VoIP |
|---|---|---|---|---|
| Calls and texts, both ways | Yes | Receive only | Yes | Yes |
| Real mobile numbers | Yes | Some | Mostly VoIP | No |
| No email to sign up | Yes | Some | Some | No |
| No ID documents, ever | Yes | Varies | Some | No |
| Pay with BTC, ETH, XMR, USDT or SOL | Yes | Often | Rarely | No |
| Numbers never recycled straight away | Yes | No | Some | Yes |
| Balance that never expires, refundable | Yes | No | Some | Some |
| Works in the browser, no app store | Yes | Yes | Rarely | Some |
| Phone system with call flows | Yes | No | No | Yes |
| No per-user pricing | Yes | — | — | Per seat |
Based on the public offers of the main services in each category, September 2026. “Some” means some services in the category do it.
In detail
Where each kind of service falls short
Each category gets part of it right. Here is what’s missing from each.
SMS rental sites
Built to receive one code, then move on. Numbers are often shared or recycled, outgoing calls and texts rarely exist, and balances can be locked or expire.
Second-number apps
Polished apps, but tied to app stores and cards, mostly US, Canada and UK, and some ask for ID after you’ve paid.
Business VoIP
Excellent call handling, but per-seat pricing, contracts, company verification and card payments.
Alternatives
Looking for an alternative to…
A factual summary from each service’s public pages (September 2026), and how Numonym differs.
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Google Voice alternativeWhat it offersFree US numbers for people who already have a US phone number to verify with, inside a Google account; idle numbers can be reclaimed after 3 months.
With NumonymNumbers in 12 countries with nothing to link — and yours for as long as you renew.
Full comparison -
TextNow alternativeWhat it offersFree US and Canadian numbers paid for by ads; free numbers are recycled when they go unused.
With NumonymNo ads, no inactivity rules, and real mobile numbers that receive verification codes.
Full comparison -
Burner alternativeWhat it offersSecond US and Canadian lines, with an account opened with your own phone number or an Apple or Google account.
With NumonymNo phone number or Apple/Google sign-in: a random 16-digit account number and crypto.
Full comparison -
Silent.link alternativeWhat it offersPrepaid eSIM data in 160+ countries, with an optional US number that receives texts but can’t send them or take regular calls.
With NumonymNumonym numbers make and receive calls and texts, in the browser or any SIP app.
Full comparison -
JMP.chat alternativeWhat it offersUS and Canadian numbers used through Jabber (XMPP) apps, with an optional SIP account for calls; paid by card or in crypto.
With NumonymNumbers in 12 countries, used in your browser with no Jabber account or setup.
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TextVerified alternativeWhat it offersUS numbers rented mainly for verification codes, with an email-based account and a reactivation fee after expiry.
With NumonymNo email, no reactivation fee: 30 days to renew at the normal price, then quarantine.
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Hushed alternativeWhat it offersApp-based US, Canadian and UK internet numbers with an email account; app stores and cards, and Bitcoin on the web.
With NumonymNo app store, no email, no ID: a 16-digit account number and passkeys.
Full comparison -
MySudo alternativeWhat it offersSeveral identities, each with a number and an email, paid through app stores; US, Canadian and UK numbers, with ID checks for UK ones.
With NumonymCrypto payments, no ID in any country, and real mobile numbers in 12 countries.
Full comparison -
Crypton.sh alternativeWhat it offersText messages on SIM-based and virtual numbers in a handful of countries, paid by card or in crypto; voice calls announced as coming soon.
With NumonymCalls as well as texts today, voicemail transcription, and a phone system for teams.
Trademarks belong to their owners. Offers change — check each service for its current terms.
Why not just use a free SMS-receiving website?
Those numbers are public and shared: anyone can read the codes and recover the accounts you created with them. A rented number is yours alone, for as long as you keep it — which is what account recovery needs.
Is a second-number app the same thing?
Close, but most need an app store account and a card, many cover only the US, Canada and the UK, and several ask for ID later. Numonym works in the browser, takes crypto, and never asks for documents.
Can Numonym replace my business VoIP provider?
For most small and mid-size teams, yes: numbers in several countries, call flows, queues, unlimited extensions, SIP trunking and a shared SMS inbox — without per-seat pricing or company paperwork.
Try the difference
A real number, calls and texts both ways, no email, no ID — with a 72-hour swap guarantee.