What technologies does CALLR use?

CALLR uses Sendgrid, Gmail, Outlook, Google Apps, MailChimp SPF. View their full technology stack — including all 14 detected tools — on StackWho.

Who is the Co-founder and CTO of CALLR?

Florent Chauveau is the Co-founder and CTO at CALLR. Get verified contact information on StackWho.

Who is the CEO of CALLR?

Taoufik Zagdoud is the CEO at CALLR. Get verified contact information on StackWho.

Where is CALLR located?

CALLR is based in Paris, Ile-de-France, France.

CALLR

Q: What industry is CALLR in?

CALLR operates in the telecommunications industry.

callr.com

telecommunications

callr.com

Paris, Ile-de-France, France

1-10 employees

8291000 revenue

LinkedIn Profile

About CALLR

voice api, call tracking, voice broadcasting, click to call, api, mobile, business services, collaboration, business productivity, information technology, enterprise software, internet, software, call scheduling, b2b, services, call volume management, crm data push, call recaps, call data push to bi

CALLR's Tech Stack

AI/ML

Decision Makers at CALLR

2 contacts

Florent Chauveau

Co-founder and CTO

f***@callr.com Sign up to view

Taoufik Zagdoud

CEO

t***@callr.com Sign up to view

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14 technologies detected · 2 decision makers · Emails available

Sales Outreach Angle

AWS infrastructure signals engineering sophistication. This company likely evaluates cloud cost management, security tooling, observability, and developer productivity solutions.

CALLR's Position in the StackWho Database

• CALLR is 1 of 6,980 telecommunications companies tracked in StackWho.
• 6,918 telecommunications companies in our database have verified decision-maker emails (99% of the cohort).
• 12,711 companies in Ile-de-France are in the StackWho database.
• 2,453 telecommunications companies are in the 1-10 employee range (same size as CALLR).

Technology detection from public web signals. Decision-maker contacts compiled from LinkedIn public profiles, company filings, and verified outbound testing. Methodology & sources · Updated July 2026.

Frequently Asked Questions

What technology does CALLR use?

CALLR uses Sendgrid, Gmail, Outlook, Google Apps, MailChimp SPF, Zendesk, and 8 more technologies. This data is sourced from StackWho's technology detection engine.

How do I contact the decision makers at CALLR?

StackWho has verified email addresses for 2 decision makers at CALLR. Pro members can access direct emails for the CEO, CTO, VP of Engineering, and other key contacts. Use StackWho to reach CALLR directly for sales, recruiting, or partnerships.

What industry is CALLR in?

CALLR operates in the telecommunications industry, headquartered in Paris, Ile-de-France, France. StackWho tracks technology stacks and decision maker contacts for companies across all industries.

Can I export CALLR's contact data?

Yes. StackWho Pro members can export decision maker contact data for CALLR and similar companies to CSV. Use the export feature to build targeted prospect lists segmented by technology stack, industry, or location.