Y Combinator W19
YC Winter 2019 developer tools companies
API-first stock and crypto brokerage platform
150 people · San Francisco, CA, USA · Developer Tools, Fintech, API, Investing · YC page
Superb AI provides end-to-end computer vision MLOps platform
80 people · Seoul, Seoul, South Korea · AIOps, AI, ML · YC page
Glide turns spreadsheets into beautiful, intelligent apps.
46 people · San Francisco, CA, USA · Developer Tools, No-code, Enterprise Software, AI · YC page
Mobot is a QA-as-a-service platform using actual mechanical robots
40 people · New York City, NY, USA · Developer Tools, Hardware · YC page
Termius is an SSH client with team collaboration features
35 people · Auckland, New Zealand · Developer Tools, DevSecOps, IoT Security · YC page
Cloud Development Environments with one click
30 people · San Francisco, CA, USA · Developer Tools, Open Source, Kubernetes · YC page
Develop your CI/CD pipelines as code and run them anywhere
22 people · San Francisco, CA, USA · Developer Tools, DevSecOps · YC page
Design system platform joins developers and designers together
20 people · Prague, Prague, Czechia · Developer Tools, Design Tools · YC page
Fixing data quality in product analytics.
10 people · Reykjavík, Iceland · Developer Tools · YC page
Cosmic is an AI-powered headless CMS
5 people · San Francisco, CA, USA · Developer Tools, API · YC page
On demand ephemeral environments to run manual and automated tests.
4 people · Bengaluru, KA, India · DevOps · YC page
Universal, Pure-GPU HTML Renderer
1 person · San Francisco, CA, USA · Developer Tools, Hard Tech, Gaming, API · YC page
First IoT reliability platform for debugging, monitoring, OTA updates
80 people · San Francisco, CA, USA · Developer Tools, IoT · YC page
Secure secrets. Prevent breaches. Keep teams moving.
25 people · Austin, TX, USA · Developer Tools, DevSecOps, Security · YC page
Work at the speed of thought
6 people · San Francisco, CA, USA · Developer Tools, Productivity · YC page
Build React components visually
6 people · Remote · Developer Tools, Design Tools · YC page
Acquired by Brex. Building digital payments infrastructure.
5 people · San Francisco, CA, USA · Payments, Infrastructure · YC page
No-code Web Apps testing for everyone
5 people · Chicago, IL, USA · Developer Tools · YC page
Basilica is an API that embeds high-dimensional data like images and…
2 people · San Francisco, CA, USA · Machine Learning, API · YC page
Managed equipment data pipelines for manufacturers
2 people · Boston, MA, USA · Data Engineering · YC page
Datamode (datamode.com) is a tool for engineers to instantly diagnose…
1 person · Seattle, WA, USA · Analytics, Data Engineering · YC page
FAQ
How many developer tools companies are in YC Winter 2019 (W19)?+
21 launched companies in YC Winter 2019 carry a developer-tools or infrastructure tag in YC's directory (snapshot of 2026-10-20); 12 are active. Companies that have not launched publicly on YC's site yet are not counted.
What are the top tags in YC W19 dev tools?+
Developer Tools (15), API (4), DevSecOps (3), AI (2), Data Engineering (2). 1 of 21 are tagged open source.
Which YC W19 dev-tool companies are the largest?+
By team size on YC's directory: Alpaca, Superb AI, Glide.
← Summer 2019All YC dev-tool companiesOpen-source YC companies
Source: Y Combinator's public company directory via the unofficial mirror yc-oss/api. DevHunt is not affiliated with Y Combinator.