Y Combinator · Feb 2026
YC launch announcing Fiber AI's contact-data and search product expansion, with claims about verified phones/emails, better search than LinkedIn, and lower pricing than major vendors.
The freshest data APIs for AI sales, recruiting, & growth products
Company research
Public company, workplace, funding, and market signals
Updated Jul 29, 2026
Overview
Fiber AI is a YC S23, San Francisco–headquartered B2B data infrastructure company building agent-native APIs and MCP tools for company/person search, enrichment, and verified work contact reveal for sales, recruiting, and GTM workflows.
Primary product
B2B data APIs and MCP tools for company and people search, profile enrichment, and verified email/phone reveal.
Founded
2023
Headquarters
San Francisco, California, United States
Team size
11-50 employees
Work style
Flexible
Industry
Software Development
Sub-industry
B2B data infrastructure / sales intelligence API
Offices
San Francisco, California, United States
San Francisco, 94105, United States
Business model
API-first B2B SaaS
credit-based usage model
data platform / data licensing
Funding
Stage
Seed
Total raised
$4.3M
Latest round
Seed
Latest amount
$4.3M
Rebel Fund
People & investors
Work & culture
Founder-led and technically heavy, with a strong emphasis on speed, cost efficiency, agent-native workflows, and shipping infrastructure for sales and recruiting teams.
Work style
Flexible
Compensation
A publicly posted remote role listed a salary range of $36K-$84K for a founding chief of staff / marketing strategy & operations lead position.
Product & market
Pricing
Credit-based API pricing with per-org credits and explicit cost confirmation before billable operations.
Differentiators
- —Fresh data across 40M+ companies, 850M+ people, and 30M+ jobs
- —Verified emails and phone numbers
- —Live LinkedIn profile/company enrichment
- —Natural-language search and advanced filters
- —APIs plus MCP tools for agentic workflows
- —Clear cost controls and explicit charge confirmation
- —Claims of being 4x cheaper than Clay, Apollo, and ZoomInfo for contact data
Technology
JavaScript
TypeScript
React
Next.js
Postgres
AWS DocumentDB
AWS Lambda
Elasticsearch
Elastic
LinkedIn
Marketo
Loom
Microsoft
Customers
HubSpot
Agent AI
Ramp
DocuSign
Flatfile
Karat
Centralize
Fonzi
Lumos
Secureframe
Competitors
People Data Labs
Crustdata
Cognism
CoreSignal
Explorium
Clay
Apollo
ZoomInfo
Demandbase
OneShot.ai
Scale & contact
Latest news
LinkedIn · Jul 2025
Company post promoting Fiber AI's verified phones and emails, 0% email bounce guarantee, and customer claims such as Ramp, Docusign, and Flatfile.
Forbes · Jan 2024
Forbes profile of Fiber AI noting the founders and reporting $4.3M raised from investors including Rebel Fund and Soma Capital.
Elastic · Jul 2023
Customer story describing Fiber AI's product, architecture, customer outcomes, and a public claim that it reached over $1M ARR within six months of launch.
Jobs and careers at Fiber AI
0 jobs at Fiber AI
No open positions
Check back later for new openings