We believe that voice & SMS technology will be the single most important business driver in the future.

Founded 2011
16-50 employees
  • Digital Communication
  • Headquarters address

    CALLR is a french startup based in Paris and with offices in New York City. Founded in 2011, it is profitable from day one and has had since then a mean annual growth of more than 100%.

    We are the missing link between the web and the telecommunications industry.

    We provide a high-performance API that allows users to embed Voice and SMS messaging at whichever scale into their apps, websites, CRM software or other information system.
    We also provide a sleek user interface that allows clients who do not have the technical abilities to use our API to still profit from our services to create marketing and/or alerting Voice & SMS campaigns.

    We are the owners of our whole infrastructure inside several datacenters and our API processes hundreds of millions of requests per month.

    Today, with scaling and swift features release in mind, we are hiring multiple frontend and backend engineers to help us expand our reach and serve our customer for the better.

    Come join us in the heart of Paris, in our brand new offices !

    Tech stack

    Angular2, PHP, MySQL, Redis, Memcached, RabbitMQ


    Health and wellness

    Health insurance
    Dental insurance
    Vision insurance
    CALLR - Company Photo
    CALLR - Company Photo
    CALLR - Company Photo
    CALLR - Company Photo