Middleware
Hiring
What they do:
AI-based full stack observability platform
Quick facts:
HQ: San Francisco, CA, United States
Top B2B Software Startups in California
This list has 2,349 startups and was last updated on Oct 15, 2026. 592 of them are hiring right now. Biggest hubs: San Francisco (2,110), Los Angeles (79), and San Diego (12). Largest teams: Stripe, Deel, and GrubMarket. Latest round: Modal raised $750M (Oct 14, 2026).
2,349 startupsPage 6 of 66
Salient
Hiring
What they do:
AI Servicing for Auto Lenders
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HQ: San Francisco, CA, United States
Vooma
Hiring
What they do:
Automation platform for logistics
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HQ: San Francisco, CA, United States
Hub
Hiring
What they do:
Real-world training data for frontier AI labs and robotics.
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HQ: San Francisco, CA, United States
What they do:
The multiplayer AI agent builder. Let anyone build, IT controls access
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HQ: San Francisco, CA, United States
SigNoz
Hiring
What they do:
Open source alternative to DataDog
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HQ: San Francisco, CA, United States
What they do:
The only end-to-end crowdfunding platform built for today’s creators
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HQ: San Francisco, CA, United States
What they do:
B2B debt collection powered by AI agents
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HQ: San Francisco, CA, United States
What they do:
Connect, Unify, Respond to any data, anywhere with human-level…
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HQ: San Francisco, CA, United States
FurtherAI
Hiring
What they do:
AI Workforce for the Insurance Industry
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HQ: San Francisco, CA, United States
Streak
Hiring
What they do:
Streak transforms Gmail into a powerful CRM
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HQ: San Francisco, CA, United States
What they do:
no-code end-to-end testing that integrates with any CI/CD pipeline
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HQ: San Francisco, CA, United States
What they do:
Expo brings together the best of web and native app development
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HQ: San Francisco, CA, United States
What they do:
Sales software for roofers. Aerial measurements + proposals in seconds
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HQ: San Francisco, CA, United States
Inscribe
Hiring
What they do:
AI Document Fraud Detection for Banks, Credit Unions & Lenders
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HQ: San Francisco, CA, United States
BlueCargo
Hiring
What they do:
The automated solution for complex freight transactions.
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HQ: Los Angeles, CA, United States
Sieve
Hiring
What they do:
The multimodal data lab
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HQ: San Francisco, CA, United States
Bretton AI
Hiring
What they do:
AI-native operations for the banks
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HQ: San Francisco, CA, United States
Trellis AI
Hiring
What they do:
Accelerate Medication Access with AI
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HQ: San Francisco, CA, United States
Stacksync
Hiring
What they do:
Real-time and two-way sync between CRMs and Databases
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HQ: San Francisco, CA, United States
What they do:
Turnkey security & hassle-free cyber insurance from leading insurers
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HQ: San Francisco, CA, United States
Eze
Hiring
What they do:
The easiest way to track, buy, and sell your company’s tech — all in…
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HQ: San Francisco, CA, United States
HockeyStack
Hiring
What they do:
The operating system for inbound B2B revenue
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HQ: San Francisco, CA, United States
What they do:
Sourceress is an AI recruiter that is reinventing how people find jobs. With tailor-made machine learning models, we rigorously define what a company is…
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HQ: San Francisco, CA, United States
Okteto
Hiring
What they do:
Cloud Development Environments with one click
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HQ: San Francisco, CA, United States
Recall.ai
Hiring
What they do:
The API to get recordings, transcripts, and metadata from meetings
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HQ: San Francisco, CA, United States
What they do:
AI-powered content creation infrastructure for apps
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HQ: San Francisco, CA, United States
What they do:
Open-source, serverless vectordb for production-scale generative AI
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HQ: San Francisco, CA, United States
Truewind
Hiring
What they do:
AI-Powered Accounting
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HQ: San Francisco, CA, United States
Hyperbound
Hiring
What they do:
Revenue Activation Platform
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HQ: San Francisco, CA, United States
Outset
Hiring
What they do:
AI-powered user interviews
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HQ: San Francisco, CA, United States
Giga
Hiring
What they do:
AI Support Agent for Enterprises.
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HQ: San Francisco, CA, United States
What they do:
AI code review agent with complete context of your codebase
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HQ: San Francisco, CA, United States
Reducto
Hiring
What they do:
The complete agentic document platform
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HQ: San Francisco, CA, United States
Alex
Hiring
What they do:
Alex is the AI recruiter for hiring great people.
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HQ: San Francisco, CA, United States
AfterQuery
Hiring
What they do:
Applied research lab curating data solutions for foundation model…
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HQ: San Francisco, CA, United States