JustAI
YC W24San Francisco, US · Founded 2024 · 4 employees · Hiring · 5 known investors
Find your way into JustAI
1,221 people in our graph share verified history with the JustAI team — schools, employers, funds. One of them is your warm intro.
Chris Bischoffunlockedknows Neha Mittal · together at Goldman Sachs (overlapped)
×10knows the team · via Goldman Sachs
knows the team · via Pinterest
A company focused on growth and productivity solutions that prioritizes customer needs over technology for its own sake.
Also known as Choice · Choice AI · just words · Just Words
AI & Machine LearningEnterprise SoftwareMarketing TechSaaSArtificial IntelligenceReinforcement LearningWorkflow AutomationPersonalizationMarketingUnited States of AmericaAmerica / Canada
Founders & leadership· Y Combinator alumni (W24)
JustAI was founded in 2024 by Neha Mittal and Jeff Hara.
NM
Neha Mittalin𝕏CEO and Co-founderNeha Mittal held product leadership roles at Pinterest and Twitter, and previously worked in product and engineering positions at the Chan Zuckerberg Initiative and Goldman Sachs. She co-founded CityStructure and was an early engineer at Sensorflow.
JH
Jeff HarainCofounder and CTOPreviously a senior machine learning engineer at Twitter and Automattic, with earlier ML work at Mercari and a stint as Founder-in-Residence at Foundations. He began his career at Stanford, working as a software engineer at the Center for the Study of Language and Information and as a research assistant in the Computer Graphics Laboratory.
Investors · 5
Peak XV PartnersTrianon · $100K – $10M
Y CombinatorSan Francisco · $500K
Base10 PartnersreportedSan Francisco · $100K – $5M
Also in the syndicate · 2
Base 10leadBase10lead
Funding
SEC filings, press & company announcements$17M disclosed across 1 round · 2026
- $17MSeries AJun 2026 · 10 sources
Base 10 (lead), Base10 (lead), Base10 Partners (lead), Peak XV Partners, Y Combinator
Source ↗
Source: company announcements and press reports — follow each round's link for the claim.
The YC application· Winter 2024 batch
Alumni Q&A
- How did your company get started? (i.e., How did the founders meet? How did you come up with the idea? How did you decide to be a founder?)
- The founders met while leading Growth at Twitter, where they observed that small copy changes had outsized effects; one push notification edit added 800K users. Because each change took 3-6 months to ship, they built internal tools to automate the process and saw 20% additional user growth, then encountered similar problems at Pinterest before leaving to build justwords.ai.
- What is your long-term vision? If you truly succeed, what will be different about the world?
- The founders aim to automate the full lifecycle marketing loop—strategy, creation, optimization, and learning—using AI agents, with humans acting as orchestrators rather than operators. They envision campaigns that continuously test and improve themselves, shifting brands from batch campaigns to always-on, personalized cross-channel journeys, and giving marketers at any company size access to enterprise-level capabilities.
Summarized from the founders' answers on their Y Combinator profile.
Competitors · 1
by search overlap
Companies competing with JustAI for the same Google search keywords, organic and paid, via search-intersection analysis.
In the news
Frequently asked questions
- What does JustAI do?
- A company focused on growth and productivity solutions that prioritizes customer needs over technology for its own sake.
- Who founded JustAI?
- JustAI was founded by Neha Mittal, Jeff Hara in 2024.
- Who are JustAI's investors?
- JustAI's investors include Peak XV Partners, Y Combinator, Base10 Partners.
- How much funding has JustAI raised?
- JustAI has disclosed $17M raised across 1 round.
- Where is JustAI headquartered?
- JustAI is headquartered in San Francisco, US.