Onyx

Onyx

AI-powered mobile trainer with form feedback

Overview

Onyx is a mobile AI-powered personal trainer for at-home workouts. It uses the smartphone camera to track movements, automatically counts reps, and provides real-time feedback on form to prevent injuries and improve effectiveness. It offers personalized workout plans aligned with goals like strength, muscle building, or weight loss, and it tracks progress over time. Its differentiator is real-time form correction and rep counting through computer vision, combined with integrated coaching and progress tracking in one app to support safer, more effective workouts.

YC Company

About Onyx

Simplify's Rating
Why Onyx is rated
C+
Rated C on Competitive Edge
Rated B on Growth Potential
Rated C on Differentiation

Industries

Data & Analytics

Consumer Software

AI & Machine Learning

Healthcare

Company Size

11-50

Company Stage

Seed

Total Funding

$10.1M

Headquarters

San Francisco, California

Founded

2023

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Simplify's Take

What believers are saying

  • Zoom acquisition on September 23, 2026 gives Onyx enterprise reach and sales muscle.
  • Self-hosting fits regulated buyers like NASA, Ramp, and universities demanding data sovereignty.
  • Open-source positioning keeps developer adoption strong while customers pilot agentic search.

What critics are saying

  • Zoom's September 23, 2026 acquisition strips Onyx's independence and startup upside.
  • Microsoft and Google bundle enterprise search into existing workflows, compressing Onyx's pricing power.
  • If Zoom prioritizes proprietary bundling, Onyx's open-source community loses trust quickly.

What makes Onyx unique

  • Open-source, self-hosted enterprise search gives buyers data-control Zoom now values.
  • March 12, 2025 seed from Khosla and First Round validated product-market fit.
  • YC W24 pedigree and 30,000-developer community widen distribution beyond classic SaaS.

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Funding

Total Funding

$10.1M

Above

Industry Average

Funded Over

2 Rounds

Seed funding is usually the first official round after pre-seed, when a startup has a prototype or concept. It’s typically used to develop the product, test the market, and start building the team. Investors here are often angel investors or early-stage venture capitalists.
Seed Funding Comparison
Above Average

Industry standards

$3.3M
$2M
Netflix
$2.3M
Instacart
$3M
Robinhood
$10M
Onyx

Benefits

Remote Work Options

Flexible Work Hours

Unlimited Paid Time Off

Paid Vacation

Health Insurance

401(k) Retirement Plan

401(k) Company Match

Wellness Program

Mental Health Support

Conference Attendance Budget

Professional Development Budget

Stock Options

Company Equity

Parental Leave

Family Planning Benefits

Fertility Treatment Support

Adoption Assistance

Phone/Internet Stipend

Home Office Stipend

Relocation Assistance

Tuition Reimbursement

Professional Certification Support

Company News

Customer Experience Magazine
Sep 25th, 2026
Zoom Buys Onyx to Bring Self-Hosted Enterprise AI Search

Zoom has bought Onyx, an open-source enterprise AI search platform that runs on customers' own servers, with implications for CX.

AiThority
Mar 13th, 2025
Onyx Raises $10 Million To Help Teams Find Knowledge Faster with Open Source AI Agents

Onyx, the first AI deep research agent designed for the workplace, announced today a $10M seed round of funding.

The Business Journals
Apr 3rd, 2024
Here's what you need to know about Y Combinator's 2024 winter batch demo day

Y Combinator seeded more than 250 companies in its current winter batch, which leans heavily into AI. One particular AI subcategory has nearly tripled over the past year.

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