15 Best Telephony Startups to Watch in 2025

The Definitive Seedtable Ranking of Telephony Startups

We track 71,000+ companies and rank them dynamically using our Seedtable Score – a score that uses quantitative and qualitative data points to signal the momentum behind a company. We then monitor the list manually leveraging our expertise as founders and investors.

There are 15 start-ups with an aggregate funding of $745.9m. The average funding per company in this subset is $49.7m.

Last update to the database: Feb 18, 2025. See changelog.

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Aircall logo

Aircall

Cloud based phone system and call center software with integrations into CRMs & helpdesk software.

18

Funding Rounds

$383.4m

Money raised

Jajah logo

Jajah

Jajah is a Mountain View, California-based company founded in 2005.

4

Funding Rounds

$33.0m

Money raised

RingDNA logo

RingDNA

ringDNA is a company that transforms sales team into a high-performing revenue engine.

7

Funding Rounds

$41.2m

Money raised

TeleStax logo

TeleStax

TeleStax is an Austin, Texas-based company founded in 2011 by ivelin Ivanov, Paul Doscher, Amit Bhayani and Jean Deruelle.

3

Funding Rounds

$8.3m

Money raised

CallRail logo

CallRail

CallRail is an Atlanta-based company founded in 2011 by Andy Powell.

4

Funding Rounds

$202.3m

Money raised

Knowlarity logo

Knowlarity

Knowlarity is a Singapore-based company founded in 2009 by Pallav Pandey.

2

Funding Rounds

$6.5m

Money raised

fontacto logo

fontacto

fontacto is a Mexico-based company founded in 2012 by Ricardo Cacique, Jose Antonio del Rio, Joaquin Martínez and Daniel Martinez.

1

Funding Rounds

Unison Technologies logo

Unison Technologies

Developer of a co-investing platform designed to help in long-term financing. The company's platform offers long-term investments in individual residential properties through their innovative programs in exchange for the opportunity to share gain or loss in the home's value when they decide to sell, enabling applicants to buy homes without interest or monthly payments.

1

Funding Rounds

$40.0m

Money raised

Ring.io logo

Ring.io

Ring.io is a company founded in 2009 by Sam Aparicio.

1

Funding Rounds

$200.0k

Money raised

Fonix logo

Fonix

Fonix is a London-based company founded in 2006 by Will Neale, Marcus Kern and Rob Weisz.

1

Funding Rounds

$1.8m

Money raised

Lightyear AI logo

Lightyear AI

Company enabling users to find, compare, and purchase business IT infrastructure (internet, voice, managed wi-fi, etc.) completely online.

2

Funding Rounds

$7.4m

Money raised

Invoxia logo

Invoxia

Invoxia is an Issy-les-Moulineaux-based company founded in 2010 by Éric Carreel.

1

Funding Rounds

Ringover Group logo

Ringover Group

Ringover Group is a Paris-based company founded in 2005 by Renaud CHARVET.

2

Funding Rounds

$18.8m

Money raised

ShoutNow logo

ShoutNow

ShoutNow is a company founded in 2019 by Joel Smith.

1

Funding Rounds

$20.0k

Money raised

Infratel logo

Infratel

Infratel is a Lusaka-based company founded in 2003.

1

Funding Rounds

$3.0m

Money raised