Acquisition
Jul 2026ZeroEntropy announced it had been acquired by Notion; the whole team joined Notion, models were open-sourced under Apache 2.0, and products were slated to sunset on 2026-09-04.
SourceCompany research
Public company, workplace, funding, and market signals
Updated Jul 30, 2026
Overview
ZeroEntropy is a San Francisco-based AI training and inference company that builds specialized retrieval infrastructure and task-specific models for production AI systems, with an emphasis on low-latency, high-accuracy rerankers, embedders, and custom models. The company was acquired by Notion on July 24, 2026; its models were open-sourced under Apache 2.0 and products were scheduled to sunset on September 4, 2026.
Primary product
An API and model suite for AI retrieval infrastructure, centered on rerankers (zerank-2), embeddings (zembed-1), and end-to-end retrieval pipelines.
Founded
2024
Headquarters
San Francisco, California, United States
Team size
1-10
Industry
Technology, Information and Internet
Sub-industry
AI infrastructure / information retrieval / developer tools
Offices
San Francisco Bay Area
United States
France
Business model
API usage-based pricing
enterprise licensing
on-prem/VPC deployment
model licensing
white-glove support
Funding
People & investors
Leadership
Co-Founder and CEO
Co-Founder and CTO
Founding Research Engineer
Amine Raji
Angel Investor
Work & culture
Small, dense team with an intense technical culture focused on math, competitiveness, and numerical rigor; the company described itself as scrappy, rigorous, and product-led, with an emphasis on building core technology rather than merely using it.
Compensation
Public job postings showed roughly $80K-$200K base salary ranges plus equity for full-time roles and $5K-$10K/month for a summer internship; some roles also indicated equity ranges.
Benefits
Salary ranges were posted for some roles (e.g. $80K-$180K, $120K-$200K, $5K-$10K monthly intern pay)
Equity was included for open roles
Remote option was listed for at least one role (Head of Developer Experience)
Product & market
Pricing
Usage-based API pricing per token / per volume, plus pay-as-you-go search infrastructure pricing and enterprise/on-prem licensing.
Differentiators
- —Specialized small models instead of general-purpose frontier LLMs
- —Low-latency reranking and retrieval
- —Calibrated scalar models for production systems
- —Public eval harness and methodology (MTEB Evals, zELO)
- —Competitive benchmark claims on accuracy vs latency vs cost
- —On-prem/VPC deployment options
Technology
zerank-2
zembed-1
zELO
MTEB Evals
zchunk
zbench
probe
Python SDK
AWS Marketplace
Azure
VPC deployment
custom kernels
inference stack
Hugging Face
Apache 2.0
Customers
Notion
Assembled
Competitors
Cohere
Jina AI
Voyage AI
OpenAI embeddings
Gemini embeddings
BGE
Hugging Face models
Scale & contact
Signals & risks
Shutdown
Sep 2026ZeroEntropy announced existing products would be sunset on September 4, 2026 and new signups disabled after the Notion acquisition.
SourceLatest news
Notion · Jul 2026
Notion announced it had acquired ZeroEntropy; ZeroEntropy’s team was joining Notion and its models were being open-sourced under Apache 2.0, with products sunset on September 4, 2026.
ZeroEntropy Blog · Jul 2026
ZeroEntropy confirmed its acquisition by Notion, said new signups were disabled, and announced product support until September 4, 2026 plus migration guidance for customers.
ZeroEntropy Blog · Feb 2026
Case study describing Assembled as a customer using ZeroEntropy reranking in production.
ZeroEntropy Blog · Jul 2025
ZeroEntropy announced a $4.2M seed round led by Initialized Capital and stated total capital raised was approximately $4.4M.
TechCrunch · Jul 2025
TechCrunch reported on ZeroEntropy’s seed financing and identified Ghita Houir Alami and Nicholas Pipitone as co-founders.
Jobs and careers at ZeroEntropy
0 jobs at ZeroEntropy
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