What technologies does Return Zero use?

Return Zero uses Route 53, Amazon SES, Gmail, Google Apps, Microsoft Office 365. View their full technology stack — including all 13 detected tools — on StackWho.

Who is the Chief Executive Officer of Return Zero?

Chamsol Lee is the Chief Executive Officer at Return Zero. Get verified contact information on StackWho.

Where is Return Zero located?

Return Zero is based in Seoul, South Korea.

Return Zero

rtzr.ai

information technology & services

rtzr.ai

Seoul, South Korea

11-50 employees

LinkedIn Profile

About Return Zero

ai, machine learning, speech recognition, stt, asr, ai flywheel, software development, vito, real-time speech processing, meeting transcription, voice data processing, d2c, saas, multilingual speech recognition, voice data dataset, custom models, call transcription, ai speech technology, b2b, korean speech dataset

Return Zero's Tech Stack

AI/ML

Decision Makers at Return Zero

1 contact

Chamsol Lee

Chief Executive Officer

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13 technologies detected · 1 decision maker · Emails available

Sales Outreach Angle

Return Zero is a technology company. Software vendors, dev tools, and SaaS platforms find technology companies like this highly receptive. Use StackWho to identify the right decision-maker (CTO, VP Eng, or Head of Product) and reach out with a stack-specific pitch.

Return Zero's Position in the StackWho Database

• Return Zero is 1 of 194,140 information technology & services companies tracked in StackWho.
• 193,618 information technology & services companies in our database have verified decision-maker emails (100% of the cohort).
• 74,148 information technology & services companies are in the 11-50 employee range (same size as Return Zero).

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 Return Zero use?

Return Zero uses Route 53, Amazon SES, Gmail, Google Apps, Microsoft Office 365, Cloudflare DNS, and 7 more technologies. This data is sourced from StackWho's technology detection engine.

How do I contact the decision makers at Return Zero?

StackWho has verified email addresses for 1 decision maker at Return Zero. Pro members can access direct emails for the CEO, CTO, VP of Engineering, and other key contacts. Use StackWho to reach Return Zero directly for sales, recruiting, or partnerships.

What industry is Return Zero in?

Return Zero operates in the information technology & services industry, headquartered in Seoul, South Korea. StackWho tracks technology stacks and decision maker contacts for companies across all industries.

Can I export Return Zero's contact data?

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