Telesignvs
Twilio
Twilio: Its verification product covers passcode delivery for teams that do not need separate fraud scoring
Telesign
Phone number verification and fraud scoring rather than general purpose messaging
As of 31 August 2026, Telesign's pricing is not published; the vendor quotes on request. Identity and fraud APIs built on phone number intelligence, used to score signups before they become accounts. Softwr lists it under Telecommunications. Telesign is made by Telesign (Proximus Global), available on Web, API.
Overview
What Telesign does
Telesign provides phone number verification through SMS and voice one-time passcodes, phone number intelligence covering line type, carrier, porting and SIM swap history, and risk scoring that assesses whether a number and its subscriber history look legitimate. It was founded in 2005 and is headquartered in Los Angeles. It is not competing to be the cheapest way to send a message, and evaluating it on a per-message rate misreads the product. What a customer buys is a judgement about a phone number: how long it has existed, whether it has recently been ported or swapped to a new SIM, whether it sits in a range associated with disposable numbers and fraud. The return is measured against fraud losses and promotion abuse rather than against a rate card, and its passcode routing is optimised for delivery completion rather than lowest cost. Its pricing disclosure is unusual and asymmetric, and worth knowing before you shortlist it: Telesign publishes SMS prices for 233 countries without a login, and lists every single voice destination as quote-only, so there is no published per-minute price anywhere. Ownership explains its data position. Proximus, the Belgian telecommunications operator, acquired Telesign in 2017 through its then majority-owned subsidiary BICS, and has held it outright since February 2021. It now sits in Proximus Global alongside BICS and Route Mobile, which matters because the carrier assets are the siblings' rather than Telesign's own; Telesign is the identity software layer. A merger with the special purpose acquisition company North Atlantic Acquisition Corporation, announced in December 2021 at around 1.3 billion dollars, was terminated on 1 July 2022, and it never listed.
What people use it for
- Consumer platforms blocking fake account creation at signup
- Fintechs and marketplaces checking SIM swap history before a high value action
- Businesses suffering promotion and free trial abuse from disposable numbers
- Products needing passcode delivery optimised for completion rather than lowest cost
Related searches
The honest half
Where it falls short
Concrete and checkable, so you can decide whether any of them matter to you. This is the half of a review a vendor will not write about Telesign.
- Risk scoring is probabilistic, so tuning thresholds trades fraud caught against genuine users blocked, and somebody has to own that trade-off continuously.
- No voice pricing is published at all: every one of the 233 destinations in its public rate card lists voice as quote only, so voice cost cannot be modelled in advance.
- It is a verification and risk product, so a business that also needs general purpose messaging will run a second vendor for that traffic.
- Number intelligence quality varies by country because it depends on operator data availability, and coverage in some markets is thinner than the global claim implies.
- The underlying carrier assets belong to its sibling companies rather than to Telesign, so network questions route back to a parent whose principal business is not developer APIs.
Cross-shopped
What people choose instead of Telesign
Each pairing was judged by two reviewers asking whether a buyer would genuinely weigh the two against each other. The ones that failed were deleted rather than published.
- TelesignvsVonage
Vonage: Verification and number insight APIs bundled with general purpose messaging and voice
- TelesignvsAuth0
Auth0: Handles authentication broadly, with phone verification as one factor rather than a fraud intelligence product
Pricing
What Telesign costs
Taken from the vendor's own pricing page. Prices move, so check before you buy.
Telesign
On request
- SMS prices published for 233 destination countries
- Every voice destination listed as quote only
- Enterprise agreements normally tied to volume commitments
Capabilities
Features
Phone number verification
SMS and voice one-time passcode delivery with channel fallback
Phone number intelligence
Line type, carrier, porting and SIM swap history for a number
Risk scoring
A score for a phone number at signup or before a sensitive transaction
Published SMS rate card
SMS prices listed publicly for 233 countries
Delivery routing
Passcode routing optimised for completion rate rather than lowest cost
Answered, with sources
Questions people ask
Each answer names the page it came from, so you can check it rather than take our word for it.
Who owns Telesign?
Proximus, the Belgian telecommunications operator. It acquired Telesign in 2017 through its subsidiary BICS and has owned it outright since February 2021. Telesign now sits in Proximus Global alongside BICS and Route Mobile.
Did Telesign go public?
No. A merger with the North Atlantic Acquisition Corporation special purpose vehicle was announced in December 2021 at around 1.3 billion dollars and terminated on 1 July 2022, so it remained within Proximus.
Is Telesign a cheaper way to send one-time passcodes?
No, and that is not its purpose. It routes for verification completion and adds a risk judgement about the number. If you only need cheap message delivery, compare rate card vendors instead.
Keep looking
Where to go from Telesign
- Telesign alternativesEvery product people weigh against it
- Telesign pricingPlans, floors and what the tiers exclude
- Telesign badgesWhich rules it meets, and the figure behind each
- All Telecommunications softwareThe full category
- Best Telecommunications softwareThe shortlist, and how it was cut
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Softwr does not host reviews and shows no star rating for Telesign, because a rating we did not collect is not ours to publish. What is here is the pricing and platform detail from the vendor’s own pages, limitations we could state concretely, and alternatives a reviewer confirmed people weigh against it. Tell us if any of it is wrong.
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