# Gabriel Kalejaiye

> Gabriel Bayomi Tinoco Kalejaiye is a Brazilian-born engineer and entrepreneur who co-founded Openlayer, a San Francisco-based AI governance and observability platform. After earning his MS in Computer Science from Carnegie Mellon and working as a Machine Learning Engineer at Apple - where he contributed to both Siri and the secretive Vision Pro project - he left with two colleagues to solve the problem that haunted every AI team: models that look great in testing but fail in the real world. Openlayer provides enterprises with evaluation, monitoring, and compliance tooling across the full AI lifecycle, from prototype to production. The company raised a $14.5M Series A in May 2025, grew nearly 5x in 2024, and is now a recognized vendor in Gartner's 2026 Market Guide for AI Evaluation and Observability Platforms.

- **Role:** Co-Founder & CEO at Openlayer
- **Organizations:** Openlayer, Apple, Salesforce, Y Combinator, Carnegie Mellon University
- **From:** Brazil
- **Nationality:** Brazilian
- **Education:** Master of Science in Computer Science, Carnegie Mellon University, Computer Science, Cornell University, Ignite Program, Stanford University Graduate School of Business, Startup Accelerator (S21 Batch), Y Combinator
- **Known for:** Co-founded Openlayer, named a Representative Vendor in Gartner's 2026 Market Guide for AI Evaluation and Observability Platforms, Raised $19.3M total across seed and Series A rounds, Grew Openlayer nearly 5x in 2024

## Career timeline

- **2017-2019** — MS Computer Science at Carnegie Mellon University; worked on Amazon Alexa Prize project
- **2019-2021** — Machine Learning Engineer at Apple AI/ML R&D; worked on Siri multimodal signals and Apple Vision Pro across 15 teams
- **2021** — Left Apple with co-founders Vikas Nair and Rishab Ramanathan to found Openlayer
- **2021** — Accepted into Y Combinator Summer 2021 batch
- **2023** — Openlayer raises $4.8M seed round
- **2024** — Openlayer grows nearly 5x in annual revenue
- **2025-05** — Openlayer raises $14.5M Series A led by Race Capital; named in Gartner 2026 Market Guide for AI Evaluation and Observability

## Achievements

- Co-founded Openlayer, named a Representative Vendor in Gartner's 2026 Market Guide for AI Evaluation and Observability Platforms
- Raised $19.3M total across seed and Series A rounds
- Grew Openlayer nearly 5x in 2024
- Contributed to Apple Vision Pro and Siri ML systems across 15 teams
- Published research cited by 120+ academics
- Partnered with Telefonica Tech for EU AI Act compliance across European and Latin American markets
- Listed on Azure Marketplace as an AI governance solution
- Y Combinator S21 alumni

## Latest updates

- **2025-05** — Openlayer raises $14.5M Series A led by Race Capital, with investors including NXTP, KPN Ventures, Mindset, Y Combinator, Quiet Capital, and Telefonica
- **2025-05** — Openlayer named a Representative Vendor in the 2026 Gartner Market Guide for AI Evaluation and Observability Platforms
- **2025-03** — Openlayer partners with Telefonica Tech to deliver EU AI Act compliance across European and Latin American enterprises
- **2024-12** — Openlayer reports nearly 5x revenue growth in 2024
- **2024-10** — Enhanced test diagnosis page with list view released
- **2024-07** — Custom metrics support added to Openlayer platform

## Links

- Website: https://gbayomi.me/
- LinkedIn: https://www.linkedin.com/in/gbayomi
- Twitter/X: https://x.com/gbayomi

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Profile page: https://yespress.io/gabriel-kalejaiye
Published by YesPress — https://yespress.io
Last updated: 2026-05-14