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Telecommunications · head to head

Bandwidth vs Telesign

Bandwidth logo

Bandwidth

Telecommunications

Voice, messaging and emergency calling APIs run on the company's own US carrier network

From
On request
Rated
-
Full reviewWebsite
Telesign logo

Telesign

Telecommunications

Phone number verification and fraud scoring rather than general purpose messaging

From
On request
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Bandwidth commercial terms are negotiated contracts rather than a published rate, so a small team cannot start without going through a sales process.; Telesign risk scoring is probabilistic, so tuning thresholds trades fraud caught against genuine users blocked, and somebody has to own that trade-off continuously.
  • They diverge on capability: Bandwidth covers Owned US carrier network, Telesign covers Phone number verification.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Bandwidth and Telesign actually diverge.

Attributes where Bandwidth and Telesign differ
AttributeBandwidthTelesign
Pricing modelquotePer message and per verification, priced by destination country
PlatformsWeb, APIs, Python, JavaScript, Java, C#, RubyWeb, APIs, Java, Python, JavaScript, PHP, C#

Identical on both: starting price (On request), free tier (No), user rating (Not yet rated), category (Telecommunications).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Bandwidth

  • Owned US carrier network
  • Programmable voice
  • Messaging APIs
  • Emergency calling
  • Global numbering

Only in Telesign

  • Phone number verification
  • Phone number intelligence
  • Risk scoring
  • Published SMS rate card
  • Delivery routing

What people use each for

The jobs each tool is most often brought in to do.

Bandwidth

  • Unified communications and contact centre providers needing wholesale voice termination under their own brandnot Telesign
  • Enterprises with high call volumes where a wholesale margin on every minute is materialnot Telesign
  • VoIP deployments with US emergency calling obligations requiring E911 and dynamic locationnot Telesign
  • Platforms needing local numbers across many countries from a single suppliernot Telesign

Telesign

  • Consumer platforms blocking fake account creation at signupnot Bandwidth
  • Fintechs and marketplaces checking SIM swap history before a high value actionnot Bandwidth
  • Businesses suffering promotion and free trial abuse from disposable numbersnot Bandwidth
  • Products needing passcode delivery optimised for completion rather than lowest costnot Bandwidth

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Bandwidth

  • Commercial terms are negotiated contracts rather than a published rate, so a small team cannot start without going through a sales process.
  • US A2P messaging still requires 10DLC brand and campaign registration, and those fees plus per-segment carrier surcharges are charged on top of the negotiated message rate.
  • The self-serve developer experience is weaker than the aggregators it competes with, so teams prototyping quickly start elsewhere and migrate later, if ever.
  • Its owned-network advantage is a United States advantage; international coverage arrived through the Voxbone acquisition and does not rest on the same model.
  • Committed volume pricing means an organisation whose traffic falls short of forecast pays for capacity it did not use.

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.

Pricing, plan by plan

Bandwidth

On request
  • Bandwidth$undefined/year
    • Committed volume contracts quoted per customer
    • Per-minute and per-message rates negotiated by destination
    • US 10DLC registration and carrier surcharges billed in addition

Telesign

On request
  • Telesign$undefined/month
    • SMS prices published for 233 destination countries
    • Every voice destination listed as quote only
    • Enterprise agreements normally tied to volume commitments

Which should you pick?

Choose Bandwidth if

  • You need owned us carrier network.
  • You work on Web, APIs, Python, JavaScript, Java, C#, Ruby.
  • You also want programmable voice.
Bandwidth review

Choose Telesign if

  • You need phone number verification.
  • You work on Web, APIs, Java, Python, JavaScript, PHP, C#.
  • You also want phone number intelligence.
Telesign review

Questions people ask

Is Bandwidth or Telesign better?
Neither clearly leads. Bandwidth starts at On request and Telesign at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Bandwidth or Telesign?
Bandwidth starts at On request and Telesign at On request.
Does Bandwidth or Telesign run on more platforms?
Bandwidth runs on Web, APIs, Python, JavaScript, Java, C#, Ruby. Telesign runs on Web, APIs, Java, Python, JavaScript, PHP, C#.
What is Bandwidth best used for?
Bandwidth is most often used for unified communications and contact centre providers needing wholesale voice termination under their own brand, enterprises with high call volumes where a wholesale margin on every minute is material, voip deployments with us emergency calling obligations requiring e911 and dynamic location, platforms needing local numbers across many countries from a single supplier. Of those, unified communications and contact centre providers needing wholesale voice termination under their own brand and enterprises with high call volumes where a wholesale margin on every minute is material are not what Telesign is typically brought in for.
What can Bandwidth do that Telesign cannot?
Bandwidth covers Owned US carrier network, Programmable voice, Messaging APIs, Emergency calling. Telesign covers Phone number verification, Phone number intelligence, Risk scoring, Published SMS rate card.

Answered from the vendors’ own pages

Bandwidth: Is Bandwidth a carrier or a reseller?

It is a licensed carrier operating its own US network. That removes the wholesale margin an aggregator pays its upstream and gives direct control over routing and regulatory functions such as E911.

Telesign: 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.

Bandwidth: Do 10DLC fees apply on top of Bandwidth's rates?

Yes. US A2P messaging requires brand and campaign registration with The Campaign Registry, and the registration fees plus per-message carrier surcharges are billed in addition to whatever per-message rate you negotiated.

Telesign: 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.

Bandwidth: Did Bandwidth acquire Voxbone?

Yes, in 2020, for 519.4 million dollars. Voxbone supplied international phone numbering and became the basis of Bandwidth's coverage outside the United States.

Telesign: 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.

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