# Sergiy Korolov

> Sergiy Korolov is CEO and co-founder. Mailtrap Email API + MCP on Anchor Terminal, with grades, an about and public profiles.

- Canonical: https://www.anchorterminal.com/people/sergiy-korolov/
- Markdown: https://www.anchorterminal.com/people/sergiy-korolov/index.md (~750 tokens)
- Slim: https://www.anchorterminal.com/people/sergiy-korolov/index.min.md (~480 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/people/sergiy-korolov/index.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-10-27

CEO and co-founder.

Sergiy Korolov is managing partner at Railsware, the product studio behind Mailtrap, Coupler.io and TitanApps. Railsware credits him with shaping its culture and product approach, and he has spoken on podcasts and in interviews about development culture, product-led growth and how Mailtrap reached seven-figure revenue.

- LinkedIn: https://www.linkedin.com/in/sergiykorolov

## What Sergiy builds

- [Mailtrap Email API + MCP](https://www.anchorterminal.com/tools/mailtrap.md), graded B, 66.9/100, in Email delivery APIs. Email platform from Railsware Products Studio LLC for transactional and bulk sending, inbound mail, templates, contacts and sandbox testing. Agents reach it through a REST API, SMTP, SDKs, a CLI and a local MCP server. CEO and co-founder, researched 2026-10-27.

## Questions

### Who is Sergiy Korolov?

Sergiy Korolov is managing partner at Railsware, the product studio behind Mailtrap, Coupler.io and TitanApps. Railsware credits him with shaping its culture and product approach, and he has spoken on podcasts and in interviews about development culture, product-led growth and how Mailtrap reached seven-figure revenue.

### What does Mailtrap (Railsware) make?

Anchor Terminal lists Mailtrap Email API + MCP from Mailtrap (Railsware). Email platform from Railsware Products Studio LLC for transactional and bulk sending, inbound mail, templates, contacts and sandbox testing. Agents reach it through a REST API, SMTP, SDKs, a CLI and a local MCP server.

### How are Sergiy's tools graded?

Mailtrap Email API + MCP is graded B, 66.9 out of 100, on Anchor Terminal's benchmark, which scores every listing against the same checklist.

## Sources

- https://www.linkedin.com/in/sergiykorolov/details/experience/
- https://mailtrap.io/about-us/
- https://www.linkedin.com/in/sergiykorolov
- https://mailtrap.io/
- https://mailtrap.io
- https://docs.mailtrap.io/

These are the people building the tools we list, named for their public role in the company or project behind a listing, from public pages, with the date it was researched. They don't work for Anchor Terminal (our own team is on the about page, /about/#author). We show public roles, public profiles and what the listing pages show, nothing private. To correct something, send an about or a photo, or have a page removed, write to privacy@anchorterminal.com.

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